90109011122110101010' does not exceed 2.3 μm. The single-crystal ternary positive electrode material has smooth surfaces and rounded edges, which are beneficial for fabricating batteries having excellent electrochemical properties.
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
2.
TERNARY POSITIVE ELECTRODE MATERIAL PRECURSOR, PREPARATION METHOD AND USE
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
H01M 4/131 - Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
3.
METHOD FOR PREPARING LITHIUM IRON PHOSPHATE AND USE THEREOF
The present disclosure provides a method for preparing lithium iron phosphate and use thereof. The method comprises: adding a mixed solution of ferrous salt and ammonium dihydrogen phosphate, a citric acid solution and a pH adjusting agent in parallel into a first reactor for reaction, and simultaneously extracting the materials in the first reactor to a second reactor, and adding a copper salt solution and a sodium hydroxide solution to the second reactor for reaction, and refluxing the materials in the second reactor into the first reactor, mixing the solid material obtained in the reaction with a lithium source, and calcining the mixture in an ammonia gas stream to obtain lithium iron phosphate. This method can prepare a lithium iron phosphate precursor with a spherical structure, thereby improving the electrochemical performance of the subsequently prepared lithium iron phosphate material, which has a relatively high conductivity.
C01B 25/45 - Phosphates containing plural metal, or metal and ammonium
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
4.
COPPER-DOPED LITHIUM COBALT OXIDE PRECURSOR, POSITIVE ELECTRODE MATERIAL, AND PREPARATION METHOD THEREFOR AND USE THEREOF
Disclosed are a copper-doped lithium cobalt oxide precursor, a cathode material, a preparation method therefor and use thereof. The method comprises the following steps: (1) mixing a solution of soluble cobalt salt and copper salt, urea and a carbon source to perform a hydrothermal reaction to obtain a mixture; and (2) subjecting the mixture obtained in step (1) to solid-liquid separation, washing and drying the obtained solid product to obtain the copper-doped lithium cobalt oxide precursor. The cathode material prepared by the copper-doped lithium cobalt oxide precursor has better cycle performance and discharge capacity.
322, and a semiconductor block polymer such as P3HT-PE. The MXene material having metal properties and the semiconductor block polymer are introduced and mixed, and jointly coat lithium iron phosphate, thereby forming a Schottky junction at a position where the MXene material is in close contact with the semiconductor block polymer, such that the directional movement of electrons can be promoted and the electron transfer rate can be increased; and the block polymer has certain tensile properties, and thus can not only tightly coat the lithium iron phosphate, but also does not easily fall off during long-time charging and discharging.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
6.
MODIFIED HYDROGEL ADSORBENT, AND PREPARATION METHOD THEREFOR AND USE THEREOF
The present disclosure provides a modified hydrogel adsorbent, and a preparation method therefor and a use thereof. The preparation method comprises the following steps: (1) mixing a first polymer solution with an acid solution to obtain a solution A, mixing a second polymer, a cross-linking agent and a solvent to obtain a solution B, mixing the solution A with the solution B to obtain a mixed solution, adding a lithium ion sieve to obtain a prepolymer solution, and carrying out freezing treatment after a reaction to obtain the hydrogel adsorbent; and (2) mixing a linear polymer monomer and an initiator to obtain a modified precursor solution, mixing the hydrogel adsorbent and the modified precursor solution, and carrying out an illumination reaction to obtain the modified hydrogel adsorbent. According to the present disclosure, the adsorbent/ion sieve is entrapped in a hydrogel to prepare the hydrogel adsorbent having good mechanical stability; the impurity ion level in the adsorbent retains constant, thereby enabling a lithium extraction method for concentrating brine by illumination; and the method allows for simultaneous concentration and lithium extraction to obtain by-product salts, without the need for additional concentration steps.
B01J 20/28 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof characterised by their form or physical properties
C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
7.
SURFACE MODIFIED HARD CARBON NEGATIVE ELECTRODE MATERIAL, PREPARATION METHOD THEREFOR AND USE THEREOF
A surface modified hard carbon negative electrode material, a preparation method therefor and a use thereof, relating to the field of sodium ion batteries. The preparation method comprises mixing hard carbon powder, water, and a surface modifier to form a solid-liquid mixture, drying the solid-liquid mixture, and performing vacuum dehydration to obtain the surface modified hard carbon negative electrode material. The surface modifier is an organic compound containing both a carboxyl group and a carbonyl group. The carboxyl group in the surface modifier reacts with the hydroxyl group on the surface of a hard carbon negative electrode, so that the carbonyl group is accurately and uniformly insert into the surface of hard carbon. The introduced carbonyl groups can be used as active "anchoring points" in the electrolysis process to preferentially control and catalyze the decomposition of an inorganic salt and inhibit the excessive decomposition of an organic solvent, so that a uniformly distributed inorganic salt-rich SEI film is formed. The inorganic salt-rich SEI film is beneficial to the transmission of Na+ at an interface and maintenance of the structural stability of the SEI film, and finally the surface modified hard carbon negative electrode material having high first coulombic efficiency and excellent cycling stability is obtained.
The present application relates to the technical field of battery material preparation, and discloses a lithium manganese iron phosphate positive electrode material, and a preparation method therefor and a use thereof. In the preparation method, a manganese iron hydroxide is used as a precursor to prepare a lithium manganese iron phosphate positive electrode material. A lithium manganese iron phosphate positive electrode material having a more uniform element distribution, a more stable structure, and better electrical performance can be obtained by means of conditional controls such as pre-sintering treatment. The present application has a simple process, a high element utilization rate and low costs, is environmentally-friendly and easy to realize large-scale industrial production, and has broad industrialization prospects.
C01B 25/45 - Phosphates containing plural metal, or metal and ammonium
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
9.
IRON PHOSPHATE MATERIAL, AND PREPARATION METHOD THEREFOR AND USE THEREOF
The present disclosure provides an iron phosphate material, and a preparation method therefor and a use thereof. The method comprises the following steps: mixing a solution of a temperature-sensitive polymer having an upper critical solution temperature, a solution containing an iron source, and a solution containing a phosphorus source to obtain a mixed solution; carrying out gelation treatment on the mixed solution, then adding an alkali liquid, adjusting the pH value until the solution is acidic, and heating to obtain a precipitate; carrying out aging reaction on the precipitate together with a phosphoric acid solution to obtain a precursor material; and carrying out calcination treatment on the precursor material to obtain the iron phosphate material. In the present disclosure, by introducing the temperature-sensitive polymer, a thermo-responsive reversible sol-gel is prepared as a medium to fractionate and distribute the alkaline precipitant, so as to achieve uniform diffusion of the precipitant, avoid the problems of excess local concentration and poor product uniformity, and suppress movement of nanoparticles, thereby preventing agglomeration of iron phosphate particles.
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
10.
CONTINUOUS RECOVERY DEVICE AND METHOD FOR LITHIUM ION BATTERY POSITIVE ELECTRODE SHEETS
A continuous recovery device and method for lithium ion battery positive electrode sheets. The recovery device comprises a conveying mechanism (1), a loading mechanism (2), a pulse mechanism (3), and an unloading mechanism (4); the conveying mechanism (1) comprises a conveying line (11) and a plurality of clamps (12), the plurality of clamps (12) are uniformly distributed on the conveying line (11) in the conveying direction of the conveying line (11), and the conveying line (11) is sequentially provided with a loading area (111), a pulse area (112), and an unloading area (113) in the conveying direction of the conveying line (11); the loading mechanism (2) is configured to install a positive electrode sheet to be processed into a clamp (12) in the loading area (111), each clamp (12) is configured to sequentially convey the corresponding positive electrode sheet from the loading area (111) to the unloading area (113) through the pulse area (112), and the pulse area (112) is located on the side of the conveying line (11) facing the ground; the pulse mechanism (3) comprises a first driving member (31) and a pulse member (32), the first driving member (31) is spaced apart from and arranged below the pulse area (112), and the first driving member (31) is transmittingly connected to the pulse member (32), so that the pulse member (32) abuts against the positive electrode sheet; and the unloading mechanism (4) is configured to unload aluminum foil separated from the positive electrode sheet.
A preparation method for a ternary positive electrode material having a coating layer, which method comprises the following steps: S1, mixing a ternary material precursor with a lithium source, pre-sintering same to obtain a pre-sintered material, mixing the pre-sintered material again, and then calcining same, so as to obtain a primary ternary positive electrode material; S2, dissolving an additive T to obtain a solution U, subjecting the primary ternary positive electrode material and the solution U to mixing and washing, and drying same, so as to obtain a secondary ternary positive electrode material; and S3, subjecting the secondary ternary positive electrode material to an atomic layer deposition treatment, so as to obtain a ternary positive electrode material, wherein the additive T is composed of a lithium-containing material and a sodium-containing material, and the stirring Reynolds number during the process of washing is 200-20000. Further disclosed are a ternary positive electrode material prepared according to the method, and a lithium-ion battery.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/48 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
A wound lithium ion battery positive electrode sheet recycling processing device, comprising an unwinding assembly, a winding assembly, and a pulse assembly. The unwinding assembly is used for controlling the unwinding length of a positive electrode sheet to be processed; the winding assembly is used for collecting a processed positive electrode sheet; in the conveying direction of the positive electrode sheet, a high-voltage pulse region is arranged between the unwinding assembly and the winding assembly; the pulse assembly is arranged in the high-voltage pulse region; the pulse assembly comprises a first electrode plate and a second electrode plate; the first electrode plate and the second electrode plate are spaced from each other in the width direction of the positive electrode sheet; and both the first electrode plate and the second electrode plate can move in the thickness direction perpendicular to the positive electrode sheet, so that the first electrode plate and the second electrode plate selectively abut against the edge of the positive electrode sheet.
A porous manganese-based adsorbent, a preparation method therefor and an integrated chain use thereof. The preparation method comprises the following steps: (1) mixing a manganese source and a lithium source with water to obtain a mixed solution; (2) mixing the mixed solution with a trimellitic acid solution to implement a hydrothermal reaction; and (3) sintering a material obtained by the hydrothermal reaction to obtain the porous manganese-based adsorbent. The adsorbent can prevent bubble accumulation and rupture, avoiding the cavitation effect that may damage its microstructure, thereby improving the stability of the adsorbent. When lithium extraction fails, the adsorbent can also be directly used for synthesizing an MOF-coated lithium manganate positive electrode material.
B01J 20/30 - Processes for preparing, regenerating or reactivating
B01J 20/28 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof characterised by their form or physical properties
C02F 1/28 - Treatment of water, waste water, or sewage by sorption
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
14.
COPPER-CONTAINING SODIUM-ION BATTERY POSITIVE ELECTRODE MATERIAL PRECURSOR, AND PREPARATION METHOD THEREFOR AND USE THEREOF
y22y222 layer. The designed precursor can achieve uniform distribution of Cu in the bulk phase of the precursor, thereby reducing the phenomenon of non-uniform diffusion, and therefore a copper-containing sodium-ion battery positive electrode material prepared therefrom has better performance. Moreover, the preparation method for the structure effectively avoids the problem of the co-precipitation of Cu ions and other metal ions being difficult, solves the problems of a low Cu precipitation rate and Cu ion loss under high-ammonia conditions, enables the utilization rate of metal ions to reach 100%, and solves related problems at an industrialization end.
A lithium extraction electrode, and a preparation method therefor and the use thereof. The preparation method comprises the following steps: mixing an active material, a conductive agent, a binder, a foaming agent and a solvent to obtain a slurry, then coating a current collector with the slurry, and conducting drying and water immersion treatments, so as to obtain the lithium extraction electrode, wherein the foaming agent comprises composite silicone oil, an inhibitor and a catalyst. The foaming agent containing composite silicone oil, an inhibitor and a catalyst is used to form, in the lithium extraction electrode, micropores with a uniform pore size, and moreover the connectivity between the micropores is stronger, the specific surface area of the electrode is larger, and the porosity is higher; therefore, the prepared lithium extraction electrode has good charge-discharge performance and relatively long cycle life.
A semi-hydrated phosphogypsum gel material, and a preparation method therefor and the use thereof. By preparing the gel material from semi-hydrated phosphogypsum, an alkaline activator and a water-reducing agent, a good retarding effect can be achieved while water consumption is reduced; and by introducing a silicic acid compound and a crystal form regulator that has a succinic acid group and a silane group, a cementitious network can be provided for dihydrate gypsum crystals by means of the cooperation between the silicic acid compound and the crystal form regulator, resulting in an increase in binding strength, and therefore the strength of a gypsum product is improved. Therefore, the semi-hydrated phosphogypsum gel material can ensure the mechanical properties of the gel material on the premise of reducing water consumption and prolonging setting time.
C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
C04B 24/42 - Compounds having one or more carbon-to-silicon linkages
17.
METAL-ION-DOPED LITHIUM IRON PHOSPHATE MATERIAL, PREPARATION METHOD THEREFOR, AND USE THEREOF
23444 has good uniformity, is not prone to agglomeration, inherits the two-dimensional sheet-like morphology of the precursor material, has a porous structure, has good capability for rapid charging and discharging, and improves the rate performance of a lithium iron phosphate material by means of doping same with metal ions.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
18.
METHOD FOR MEASURING CONTENT OF INORGANIC CARBON IN POSITIVE ELECTRODE MATERIAL ADDITIVE BY USING CARBON AND SULFUR ANALYZER, AND USE OF METHOD
The present disclosure provides a method for measuring the content of inorganic carbon in a positive electrode material additive by using a carbon and sulfur analyzer, and a use of the method. The method comprises the following steps: (1) mixing a positive electrode material additive and a solvent, dissolving the mixture to obtain a suspension, and carrying out solid-liquid separation to obtain an insoluble substance to be measured; and (2) using a carbon and sulfur analyzer to measure the content of carbon in said insoluble substance, and calculating the content of inorganic carbon in the positive electrode material additive according to the following formula. According to the present disclosure, a positive electrode material additive and a solvent are fully dissolved and mixed, and a solid-liquid separation method is used to realize separation of inorganic carbon and organic carbon in the positive electrode material additive, and then the content of carbon in an insoluble substance is measured, and the content of inorganic carbon in the positive electrode material additive is calculated. The measurement method has accurate result, small fluctuation, and good development potential.
G01N 5/04 - Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
19.
PREDICTION METHOD AND APPARATUS FOR CRUSHING PARTICLE SIZE OF TERNARY POSITIVE ELECTRODE MATERIAL
Disclosed in the present invention are a prediction method and apparatus for a crushing particle size of a ternary positive electrode material. The method comprises: for each crushing device, collecting crushing particle size measurement results of the crushing device under different process parameters to form a sample data set, the sample data set comprising the crushing particle size measurement results corresponding to the crushing device under different process parameters; performing preprocessing and standard-compliant data screening on the sample data set; on the basis of different products, selecting corresponding sample data sub-sets from the sample data set for training to obtain crushing particle size prediction models corresponding to different products; and inputting process parameters, obtained on site, of the crushing device into a corresponding crushing particle size prediction model so as to obtain a crushing particle size index prediction result. By using the present invention, crushing particle size prediction models are used to obtain predicted measurement particle sizes corresponding to process parameters of current devices, so that a worker can adjust the process parameters of the devices on the basis of the deviation between the predicted measurement particle sizes and target particle size data.
G16C 60/00 - Computational materials science, i.e. ICT specially adapted for investigating the physical or chemical properties of materials or phenomena associated with their design, synthesis, processing, characterisation or utilisation
20.
ELECTRODE MATERIAL, ELECTRODE AND USE THEREOF IN EXTRACTION OF LITHIUM FROM SALT LAKE
The present invention belongs to the technical field of extraction of lithium from a salt lake. Disclosed are an electrode material, an electrode and the use thereof in extraction of lithium from a salt lake. A preparation method comprises the following steps: oxidizing a lithium-containing positive electrode material by means of an oxidizing agent, so as to obtain a delithiated positive electrode material; adding the delithiated positive electrode material into a coating liquid for coating, so as to obtain an organically coated positive electrode material; calcining the organically coated positive electrode material, uniformly mixing the calcined positive electrode material and a pore-forming agent, and subjecting the mixture to ball-milling and drying, so as to obtain an electrode material. The electrode material can significantly improve the lithium extraction effect of extraction of lithium from a salt lake, and has wide application prospects.
The present invention belongs to the technical field of lithium iron phosphate positive electrode materials. Disclosed are a lithium iron phosphate positive electrode material, and a preparation method therefor and the use thereof. The lithium iron phosphate positive electrode material comprises small lithium iron phosphate particles and large lithium iron phosphate particles, wherein gaps among the large lithium iron phosphate particles are filled with at least a portion of the small lithium iron phosphate particles, and crystal lattices of the lithium iron phosphate small particles are doped with Ti. The lithium iron phosphate positive electrode material has a relatively high compaction density, which is beneficial for improving the discharge capacity and coulombic efficiency of the material. The preparation method therefor comprises: mixing a first slurry for forming large lithium iron phosphate particles with a second slurry for forming small lithium iron phosphate particles, and drying and sintering the resulting mixture. The lithium iron phosphate positive electrode material can be further used for preparing a battery.
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
22.
COMPOSITE LITHIUM IRON PHOSPHATE POSITIVE ELECTRODE MATERIAL, PREPARATION METHOD THEREFOR, AND USE THEREOF
A composite lithium iron phosphate positive electrode material, a preparation method therefor, and the use thereof. The preparation method comprises the following steps: (1) mixing an iron source and a phosphorus source with a solvent to obtain a mixed solution, adjusting the pH value of the mixed solution to a first pH value and carrying out a first reaction, and then adjusting the pH value to a second pH value and carrying out a second reaction, so as to obtain composite iron phosphate containing ferric hydroxide; (2) sintering the composite iron phosphate, mixing same with a lithium source, and calcining same to obtain modified lithium iron phosphate; and (3) mixing the modified lithium iron phosphate with a silver salt solution, and carrying out a replacement reaction, so as to obtain the composite lithium iron phosphate positive electrode material. The method fully uses ferric hydroxide generated during the precipitation process of iron phosphate, so that no impurity removal step is required, and silver can be uniformly distributed in the ferric phosphate product, so as to form a uniformly dispersed conductive network, thus solving the problems of agglomeration and non-uniform dispersion.
C01B 25/45 - Phosphates containing plural metal, or metal and ammonium
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
23.
POROUS IRON PHOSPHATE NANOMATERIAL, AND PREPARATION METHOD THEREFOR AND USE THEREOF
Provided in the present disclosure are a porous iron phosphate nanomaterial, and a preparation method therefor and the use thereof. The preparation method comprises the following steps: mixing and reacting an iron-source-containing hydrogel microemulsion with a phosphorus-source-containing hydrogel microemulsion, so as to obtain an intermediate; and calcining the intermediate, so as to obtain the porous iron phosphate nanomaterial. In the preparation method of the present disclosure, based on a spatial confinement effect of a hydrogel template, iron phosphate nanoparticles are nucleated and grown in a network structure of the hydrogel template, thereby effectively improving the microstructure and size of a product; and a porous product can be obtained by gasifying the hydrogel, thereby effectively improving the electrochemical performance of the iron phosphate material.
Disclosed herein are a ternary precursor with a high tap density and a method for preparing same. The method comprises the following steps: (1) adding a silicon dioxide emulsion into an alkaline substrate solution to give a mixed solution; (2) adding a mixed nickel-cobalt-manganese salt solution, a precipitant, a complexing agent, and a surfactant; (3) conducting solid-liquid separation to give a solid material, and drying and crushing to give a crushed material; (4) mixing the crushed material with the alkaline substrate solution and the surfactant; (5) repeating step (2); and (6) conducting solid-liquid separation to give a solid material, and washing and drying the solid material to give the ternary precursor with a high tap density. The precursor particle prepared according to the method has a higher tap density, and can provide excellent cycle performance for the positive electrode material.
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
25.
SCREENING METHOD AND APPARATUS FOR CASCADE UTILIZATION OF RETIRED POWER BATTERIES
Disclosed in the present invention are a screening method and apparatus for cascade utilization of retired power batteries. The method comprises: performing appearance screening on battery cells, wherein the battery cells are detached from a retired power battery; performing voltage testing on battery cells that have passed appearance screening; under different ambient temperatures, performing test operations for a plurality of characteristic test items on the battery cells that have passed voltage testing; and on the basis of test results of the plurality of characteristic test items, performing classification and regrouping on the battery cells. Thus, by performing test operations for a plurality of characteristic test items on battery cells under different ambient temperatures to reflect battery status data under the impact of different ambient temperatures, accurate screening is realized.
B07C 5/344 - Sorting according to other particular properties according to electric or electromagnetic properties
B07C 5/00 - Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or featureSorting by manually actuated devices, e.g. switches
26.
SHORT-RANGE REGENERATION METHOD FOR SPENT LITHIUM NICKEL COBALT MANGANESE OXIDE POSITIVE ELECTRODE MATERIAL
The present invention relates to the technical field of the regeneration of spent batteries, and provides a short-range regeneration method for a spent lithium nickel cobalt manganese oxide positive electrode material. The method comprises: separating black mass from a spent lithium nickel cobalt manganese oxide battery; mixing a mixed solution consisting of an acid, a reductant and a surfactant with the black mass, subjecting same to acid leaching to obtain a leachate, and filtering same to obtain a purified solution, wherein the surfactant comprises sodium dodecyl sulfate and cetyltrimethylammonium bromide at a mass ratio of 1:(1-3); and carrying out spray pyrolysis on the purified solution to obtain a lithium nickel cobalt manganese oxide powder, and adding lithium carbonate to the lithium nickel cobalt manganese oxide powder, and sintering same to obtain a regenerated lithium nickel cobalt manganese oxide positive electrode material. In the method, by adding surfactants at a specific ratio, the leaching rate can be increased, and the effects of reducing the grain size of the (003) crystal plane of the material and improving the activity of the crystal plane can also be achieved, thereby increasing the capacity.
A method for recycling acid-soluble slag of neodymium-iron-boron waste. The method comprises: separating iron from rare earths/cobalt in an acid leachate of acid-soluble slag of neodymium-iron-boron waste in a selective precipitation manner to obtain a battery-grade iron phosphate product and a precipitate enriched with metal elements such as rare earths and cobalt. Compared with other recycling processes, the value of the recycled iron phosphate product is higher, achieving efficient enrichment and recovery of metal elements such as rare earths and cobalt in the acid-soluble slag of neodymium-iron-boron waste, improving the overall recovery efficiency of the acid-soluble slag of neodymium-iron-boron waste in industry, greatly reducing the discharge of the acid-soluble slag of neodymium-iron-boron waste, and reducing the storage cost; in addition, the method achieves environmentally-friendly recycling and is environmentally friendly.
A directional recycling method for removing aluminum from lithium iron phosphate waste, comprising the following steps: (1) mixing lithium iron phosphate waste, an iron salt solution and a reducing agent for pulping, and carrying out one-step reaction to obtain a mixed salt solution containing aluminum ions and ferrous ions and aluminum-removed lithium iron phosphate; (2) adjusting the pH of the mixed salt solution obtained in step (1), carrying out two-step reaction, and then carrying out solid-liquid separation to obtain aluminum hydroxide slag and a ferrous-containing solution; and (3) mixing the ferrous-containing solution obtained in step (2) with an oxidizing agent, adjusting the pH, and carrying out three-step reaction to obtain an iron salt solution, wherein the iron salt solution is used for recycling the iron salt solution in step (1). According to the aluminum removal method, no other impurities are introduced during leaching, the operation is simple, pollution is avoided, an impurity removal agent can be recycled, iron elements can be recycled, the process costs are low, and the impurity removal effect is good.
A lithium-ion sieve membrane, and a preparation method therefor and a use thereof. The preparation method comprises the following steps: (1) performing carboxyl modification treatment on a manganese-based lithium-ion sieve adsorbent, then mixing same with an organic solvent to obtain a carboxyl modified adsorbent solution, and mixing an organic polycationic compound, a pore-foaming agent, and the organic solvent to obtain a mixed solution; (2) performing surface hydroxylation treatment on a quartz plate, then soaking same in the mixed solution, blow-drying, and then soaking the quartz plate in the carboxyl modified adsorbent solution to obtain a membrane-loaded quartz plate; and (3) soaking the membrane-loaded quartz plate in a chemical cross-linking agent solution, blow-drying, performing ultraviolet irradiation treatment, and then soaking the membrane-loaded quartz plate in alkali liquor to obtain a lithium-ion sieve membrane. The method can avoid the occurrence of agglomeration during the formation of the lithium-ion sieve membrane, and ensures the hydrophilicity and stability of the lithium adsorbent after membrane formation, thereby reducing the problem of reduction of the adsorption capacity of the adsorbent caused by loss of effective components.
B01D 67/00 - Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
B01D 69/02 - Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or propertiesManufacturing processes specially adapted therefor characterised by their properties
Disclosed is a preparation method for ammonium manganese iron phosphate. The preparation method comprises: respectively mixing a mixed salt solution of metals and an ammonium dihydrogen phosphate solution with an organic solution to obtain a mixed liquor of metal salts and a mixed liquor of phosphate; concurrently adding the mixed liquor of metal salts, the mixed liquor of phosphate and a first ammonia water into a base solution for reaction; and carrying out solid-liquid separation to obtain ammonium manganese iron phosphate. A mixed metal salt solution of a ferrous source and a manganese source and a phosphorus source are subjected to a coprecipitation reaction in an organic phase, to synthesize large-particle ammonium manganese iron phosphate with high compaction density. After the ammonium manganese iron phosphate is mixed with a lithium source and a carbon source, sintering can be carried out to prepare a lithium manganese iron phosphate cathode material.
C01B 25/45 - Phosphates containing plural metal, or metal and ammonium
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
31.
POROUS IRON PHOSPHATE AND PREPARATION METHOD THEREFOR
The present disclosure discloses a porous iron phosphate and a preparation method thereof. The preparation method includes the following steps: (1) mixing a phosphorus-iron solution with an aluminum-containing alkaline solution to allow a co-precipitation reaction; (2) subjecting a reaction system obtained in step (1) to solid-liquid separation (SLS) to obtain a precipitate; (3) subjecting the precipitate obtained in step (2) to a reaction with phosphine under heating; (4) after the reaction is completed, cooling a product obtained in step (3), and soaking the product in a weak acid solution; and (5) subjecting a system obtained in step (4) to SLS to obtain a solid, and subjecting the solid to aerobic calcination to obtain the porous iron phosphate.
C01B 25/45 - Phosphates containing plural metal, or metal and ammonium
H01M 4/02 - Electrodes composed of, or comprising, active material
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
32.
POROUS IRON PHOSPHATE, PREPARATION METHOD THEREFOR, AND USE THEREOF
23233-C precursor, urea and phosphoric acid with a solvent, heating and reacting same, and then carrying out sintering treatment to obtain the porous iron phosphate. The iron phosphate prepared by the method has a three-dimensional porous structure; and because of said structure, a lithium iron phosphate positive electrode material prepared by means of using the iron phosphate as a precursor exhibits an increased specific surface area, which shortens the diffusion path of lithium ions and accelerates the diffusion, thereby improving the electrochemical properties of lithium ion batteries.
A method for treating a mother liquor resulting from preparation of soda ash from mirabilite, relating to the field of wastewater treatment. The treatment method comprises: subjecting sodium sulfate wastewater and ammonium bicarbonate to double decomposition to obtain sodium bicarbonate; acidifying a double decomposition mother liquor and then evaporating and denitrifying the acidified double decomposition mother liquor to obtain sodium sulfate; cooling and crystallizing a denitration mother liquor to remove a double salt; and mixing a mother liquor from double salt removal with aluminum sulfate and evaporating the mixture to obtain ammonium aluminum sulfate. Co-production of sodium bicarbonate and ammonium aluminum sulfate byproducts from high-concentration sodium sulfate wastewater is achieved. A large amount of high-salinity wastewater produced in industry is rationally utilized. Byproducts with higher value are produced. The process is simple, process products can all be recycled into the system, and no wastewater and waste residues are produced, thus improving economic benefits.
A lithium manganate material, a preparation method therefor, and a use thereof, relating to the technical field of lithium manganate materials. The lithium manganate material comprises aluminum-doped lithium manganate and a layered structure formed by self-assembly of functionalized graphene, wherein the aluminum-doped lithium manganate is loaded at an interlayer position of the layered structure, and the functionalized graphene is graphene grafted with glycan on the surface. The lithium manganate material has relatively high lithium ion capacity, lithium ion extraction efficiency and cycling performance. The preparation thereof comprises: mixing functionalized graphene, a lithium source, and an aluminum source, then reacting the materials with a manganese source, and further carrying out a heating reaction and calcination. The lithium manganate material can be prepared into an electrode for use in lithium extraction.
C25B 11/091 - Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of at least one catalytic element and at least one catalytic compoundElectrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalysts material consisting of two or more catalytic elements or catalytic compounds
35.
IRON PHOSPHATE MATERIAL, AND PREPARATION METHOD THEREFOR AND USE THEREOF
An iron phosphate material, and a preparation method therefor and the use thereof. In the preparation method for the iron phosphate material, by introducing acetone and C3-C5 alkyl diamines into the reaction process and performing three stages of reactions, the prepared iron phosphate material has a relatively small particle size, a high compaction density, a large specific surface area and a high purity. The preparation method is simple to operate and is thus conducive to actual production.
A self-assembled modified composite material, and a preparation method therefor and the use thereof. The self-assembled modified composite material comprises modified desulfurized gypsum which uses fly ash as a carrier and a lanthanum-based material which is self-assembled and adsorbed onto the fly ash. The composite material has a good phosphorus removal effect and a low cost, and the efficiency of phosphorus removal can reach 99.9%; moreover, the composite material has a fluorine removal effect, and the removal rate of fluorine ions can reach 98%. In the composite material, the desulfurized gypsum is combined with the fly ash, and therefore the adsorption performance of the fly ash is effectively incorporated. Moreover, the lanthanum-based material is self-assembled onto the modified desulfurized gypsum which uses the fly ash as a carrier, thereby forming a composite material having a uniform coordination structure. The composite material has a relatively large specific surface area, which further enhances the adsorption performance of the composite material and broadens the application range thereof. Therefore, the comprehensive resource utilization of industrial waste residues is achieved, and a new direction is provided for the resource utilization of solid waste.
B01J 20/04 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
B01J 20/28 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof characterised by their form or physical properties
B01J 20/30 - Processes for preparing, regenerating or reactivating
C02F 1/28 - Treatment of water, waste water, or sewage by sorption
A lithium extraction and deintercalation electrode plate and a manufacturing method therefor and a use thereof. An active layer of the lithium extraction and deintercalation electrode plate comprises a lithium-rich positive electrode material after delithiation and alginate. The alginate is used for improving the hydrophilicity of the electrode plate, and at the same time, a hydrogel structure is produced by the alginate and dissolved-out metal ions under the gelation effect generated in a water flow environment during a lithium intercalation and deintercalation cycle, so that lithium ion transport can be enhanced; the mechanical properties of the electrode plate can be improved, and the stability thereof in all directions can be maintained, thereby solving the problems of falling-off of substances and poor stable lithium-ion transport capability caused by insufficient mechanical stability of the electrode plate during long-term use.
The present invention relates to the technical field of analytical chemistry, and in particular to a measurement method for nickel, iron, copper and manganese in a battery material, comprising: first measuring the content of a manganese element, the content of an iron element, the content of a copper element, and the total amount of nickel, iron, copper and manganese elements, respectively, and then calculating the content of the nickel element on the basis of the total amount of nickel, iron, copper and manganese and the contents of the manganese element, the iron element and the copper element. During measurement of the content of the manganese element in the battery material, sodium pyrophosphate is used as a masking agent, such that Fe3+can be masked while disproportionation of Mn3+ is inhibited, thereby achieving a double-masking effect, and ensuring the measurement accuracy of the manganese content. Therefore, the objective of accurately measuring the contents of four elements, i.e., nickel, iron, copper and manganese, in the battery material is achieved. In the measurement method, no expensive measurement device is required, and a constant analysis means is used; and by efficiently using the masking agent, the interference of coexistence elements on a specific element measurement method is effectively avoided, thereby achieving a stable and reliable measurement result.
G01N 31/16 - Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroupsApparatus specially adapted for such methods using titration
G01N 21/78 - Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
39.
MODIFIED IRON PHOSPHATE MATERIAL AND LITHIUM IRON PHOSPHATE MATERIAL, AND PREPARATION METHODS THEREFOR AND USE THEREOF
The present invention belongs to the technical field of lithium iron phosphate materials, and provides a modified iron phosphate material and a lithium iron phosphate material, and preparation methods therefor and the use thereof. The modified iron phosphate material is integrally in a sheet shape and comprises zirconium phosphate of a lamellar structure, wherein elemental silver and lithium oxide are loaded between lamellas of the zirconium phosphate, and iron phosphate is formed on the outer surface of the zirconium phosphate. The modified iron phosphate material can be further prepared into a lithium iron phosphate material for use in a battery, and can improve the rate capability, coulombic efficiency, capacity and conductivity of the battery. The preparation methods for the modified iron phosphate material and the lithium iron phosphate material are simple and can realize industrial production.
The present disclosure relates to the field of battery material preparation, and provides hollow iron phosphate, a preparation method therefor, and a use thereof. According to the preparation method, a specific iron source precursor, namely spherical ferrous glycerate, is mixed with a phosphorus source for an anion exchange reaction to continuously form iron phosphate having a hollow structure. The preparation method is a template-free method in which a specific iron source precursor is used as a consumable template, rather than incorporating an additional template agent; and the obtained hollow iron phosphate can further be prepared into a lithium iron phosphate material having a hollow structure, thereby facilitating the shortening of the diffusion path of lithium ions, and the improvement of the electrochemical performance of positive electrode materials.
The present application belongs to the technical field of lithium extraction from salt lakes and particularly relates to a lithium-ion sieve precursor, a lithium-ion sieve, a preparation method therefor and a use thereof. The preparation method for the lithium-ion sieve precursor comprises the following steps: (1) dissolving a manganese salt, a lithium salt, and a carboxyl-containing polymer in solvent A to obtain solution A, and dissolving an aluminum salt in solvent B to obtain solution B; (2) mixing solution A with solution B to obtain a gel, aging the gel, and then freeze-drying the gel to obtain an aerogel; (3) carrying out a heat treatment on the aerogel to obtain an aluminum-doped lithium manganese oxide material; and (4) mixing the aluminum-doped lithium manganese oxide material with an aqueous solution in which a surfactant and pyrrole are dissolved, then adding a persulfate for reaction, and taking out a solid phase and then drying to obtain a lithium-ion sieve precursor.
The present disclosure belongs to the field of wastewater treatment and resource recovery. Provided in the present disclosure is a method for removing fluorine from a battery leaching solution. In the method, a blank organic phase is first supplemented with iron to obtain a preliminary organic phase, and then the preliminary organic phase is mixed with the battery leaching solution for extraction to obtain a fluorine-loaded first organic phase and fluorine-removed raffinate. The present disclosure realizes the deep removal of low-content fluorine impurities while extracting and separating metals, and is particularly suitable for removing fluorine from a battery leaching solution with a low fluorine content, such that fewer impurities are generated during subsequent extraction and separation, the resulting metal product has a higher purity, and the cost of subsequent treatment of fluorine-containing wastewater can be greatly reduced.
A modified aluminum-based lithium extraction adsorbent, and a preparation method therefor and the use thereof. The preparation method comprises the following steps: (1) mixing an aluminum-based adsorbent with a dihydrogen phosphate solution, and reacting same to obtain a modified adsorbent slurry; and (2) mixing the modified adsorbent slurry with a curing agent, and granulating the resulting mixture at a high temperature to obtain the modified aluminum-based lithium extraction adsorbent. The preparation method can improve the strength of the adsorbent, reduce adsorbent poisoning and prolong the service life of the adsorbent.
B01J 20/02 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material
B01J 20/30 - Processes for preparing, regenerating or reactivating
C02F 1/28 - Treatment of water, waste water, or sewage by sorption
44.
LITHIUM IRON PHOSPHATE POSITIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREFOR, AND LITHIUM-ION BATTERY
Provided are a lithium iron phosphate positive electrode material and a preparation method therefor, and a lithium-ion battery. The preparation method comprises the following steps: (1) preparing an iron hydroxymethyl acid salt two-dimensional precursor; (2) mixing the iron hydroxymethyl acid salt two-dimensional precursor with a nitrogen-containing carbon source for reaction to obtain a two-dimensional precursor material; and (3) mixing the two-dimensional precursor material, a lithium source, and a phosphorus source and sintering the mixture to obtain the lithium iron phosphate positive electrode material. The lithium iron phosphate positive electrode material is prepared by a method that is simple in process and simple to operate. The positive electrode material has a large electrode/electrolyte contact interface, so that complete infiltration of the electrolyte and the positive electrode material is facilitated; in addition, the microstructure of the positive electrode material inherits the two-dimensional sheet-like appearance of the iron hydroxymethyl acid salt precursor, and a large specific surface area of the positive electrode material provides sufficient active sites for the storage of lithium ions and electrons, thereby promoting rapid diffusion and transmission of lithium ions, and facilitating the improvement of the electrochemical performance of the lithium-ion battery.
C01B 25/45 - Phosphates containing plural metal, or metal and ammonium
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
45.
ELECTROLYTIC METHOD FOR VALUABLE METAL IONS IN WASTE LITHIUM BATTERY POWDER
The present disclosure provides an electrolytic method for valuable metal ions in waste lithium battery powder, comprising the following steps: obtaining n different types of waste positive electrode battery powder, wherein n is greater than or equal to 2, and n is a positive integer; classifying the n types of waste positive electrode battery powder to separately obtain anode treatment mixed powder and cathode treatment mixed powder; separately carrying out slurry preparation operation on the anode treatment mixed powder and the cathode treatment mixed powder to obtain an anode slurry and a cathode slurry; carrying out ionization operation on the anode slurry and the cathode slurry by means of an electrolytic device; and filtering the cathode slurry that has undergone the ionization operation to obtain a cathode post-electrolysis liquid, i.e., a valuable metal ion solution. Efficient and comprehensive ionization recovery of valuable metal ions in two or more types of waste positive electrode powder is achieved, and the operation is simple and environmentally-friendly.
C25B 15/08 - Supplying or removing reactants or electrolytesRegeneration of electrolytes
H01M 10/54 - Reclaiming serviceable parts of waste accumulators
46.
ELECTROLYTE FOR ELECTROCHEMICAL REPAIR OF LITHIUM BATTERY AND PREPARATION METHOD THEREFOR, ELECTROCHEMICAL REPAIR AND REGENERATION METHOD, AND RECYCLING METHOD
An electrolyte for electrochemical repair of a lithium battery and a preparation method therefor, an electrochemical repair and regeneration method, and a recycling method, relating to the technical field of resource recycling and regeneration. Raw materials of the electrolyte for electrochemical repair of the lithium battery comprise: a lithium salt, an aromatic agent, a stabilizing additive and a solvent, the final concentration of the lithium salt in the electrolyte is 0.1-15 g/L, the final concentration of the stabilizing additive is 0.1-5 g/L, and a mass ratio of the lithium salt to the aromatic agent is (1-5):(1-5). The electrolyte can improve the effect of repair and regeneration. When the electrolyte is used for electrochemical repair, a decommissioned battery does not need to be destroyed, no additional impurities are introduced, and indexes of an electrode sheet, such as the powder resistance and compaction density would not deteriorate. An electrochemical reaction has high current efficiency.
The present disclosure relates to the technical field of lithium-ion battery positive electrode materials. Disclosed are a preparation method for nano lithium iron phosphate and an application thereof. The method comprises: dispersing iron phosphate in an alcohol solvent, and performing ultrasonic treatment to obtain a suspension A; performing laser treatment on the suspension A, stirring the suspension A during the laser treatment, adding a lithium source and a carbon source into the suspension A having undergone laser treatment, and mixing same to obtain a suspension B; and performing spray drying on the suspension B to obtain dried powder, and sintering the dried powder in an inert atmosphere to obtain nano lithium iron phosphate.
B82Y 40/00 - Manufacture or treatment of nanostructures
B82Y 30/00 - Nanotechnology for materials or surface science, e.g. nanocomposites
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
48.
MODIFIED LITHIUM EXTRACTION ADSORBENT, AND PREPARATION METHOD THEREFOR AND USE THEREOF
Provided are a modified lithium extraction adsorbent, and a preparation method therefor and a use thereof. The modified lithium extraction adsorbent comprises an aluminum-based adsorbent and microcapsules arranged on the surface of the aluminum-based adsorbent, wherein the microcapsules include curing agent microcapsules and adhesive microcapsules. The microcapsules in the modified lithium extraction adsorbent can fill cracks when the lithium extraction adsorbent fractures due to expansion, thereby reducing the dissolution loss of the adsorbent.
B01J 20/02 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material
B01J 20/28 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof characterised by their form or physical properties
B01J 20/30 - Processes for preparing, regenerating or reactivating
The present disclosure provides a composite lithium extraction adsorbent and a preparation method therefor and a use thereof. The preparation method comprises the following steps: (1) mixing a manganese-based adsorbent, a first solvent, and an amino modifier, and carrying out a one-step reaction to obtain an amino-modified adsorbent; (2) mixing the amino-modified adsorbent, a zinc salt, tetra(4-carboxyphenyl)porphine, pyrazine, N,N-dimethylacetamide, and a second solvent, and carrying out a two-step reaction to obtain an adsorbent composite organic metal framework material; and (3) mixing a sulfo modifier, the adsorbent composite organic metal framework material, and a third solvent, carrying out a three-step reaction to obtain a hydrophilic lithium extraction adsorbent, and carrying out acid leaching treatment to obtain the composite lithium extraction adsorbent. By means of the method of the present disclosure, a composite lithium extraction adsorbent having low dissolution loss rate and high adsorption selectivity and permeability can be prepared.
B01J 20/28 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof characterised by their form or physical properties
C02F 1/28 - Treatment of water, waste water, or sewage by sorption
50.
POWER BATTERY CARBON FOOTPRINT ACCOUNTING METHOD AND SYSTEM, DEVICE, AND STORAGE MEDIUM
The present invention relates to the technical field of carbon footprint accounting. Disclosed are a power battery carbon footprint accounting method and system, a device, and a storage medium. The method comprises: obtaining the battery model and service time of a power battery; inputting the battery model and the service time into a fixed carbon footprint accounting model for carbon emission calculation to obtain fixed carbon emission data; inputting the battery model and the service time into a non-fixed carbon footprint accounting model for carbon emission calculation to obtain non-fixed carbon emission data; and adding the fixed carbon emission data and the non-fixed carbon emission data together to obtain a carbon footprint accounting result of the power battery. According to the present invention, by means of aging analysis and recycling analysis, accurate carbon footprint accounting for the full lifecycle of the power battery is achieved; moreover, according to the present invention, calculation of echelon carbon emission data is performed down to the component level, achieving accurate estimation of the carbon emission data in an echelon utilization phase, further improving the accuracy of carbon footprint accounting of the power battery.
A preparation method for a composite lithium manganese iron phosphate positive electrode material, comprising the following steps: (1) mixing a lithium manganese iron phosphate core material with a surfactant solution, ultrasonically dispersing to obtain composite micelles of lithium manganese iron phosphate, and adding a swelling agent while heating and stirring, to obtain rod-shaped micelles; (2) mixing the rod-shaped micelles with a phosphorus source, an iron source and a lithium source, and reacting by heating, to obtain a precursor; (3) sintering the precursor, to obtain a composite lithium manganese iron phosphate positive electrode material. The composite lithium manganese iron phosphate positive electrode material has lithium manganese iron phosphate as a core, and lithium iron phosphate having a spatially graded pore structure as a shell. The lithium iron phosphate having a spatially graded pore structure is coated on the outside of the lithium manganese iron phosphate, which inhibits the dissolution of manganese, and can also increase the specific surface area of the positive electrode material, shorten the lithium ion transport distance, and make full use of the electrical performance of the positive electrode material.
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
C01B 25/45 - Phosphates containing plural metal, or metal and ammonium
52.
METHOD AND APPARATUS FOR REMOVING CHROMIUM FROM FERRONICKEL LEACHATE
A method and an apparatus for removing chromium from a ferronickel leachate. Iron phosphate seed crystals are used as an inducer to treat a ferronickel leachate, so that formation of chromium phosphate dihydrate precipitate can be rapidly induced in the form of nucleation, and chromium can be removed from the ferronickel leachate more thoroughly at a specific reaction temperature, significantly enhancing the chromium removal rate.
An electrochemical lithium extraction apparatus, and a method, relating to the technical field of electrochemical metallurgy. The apparatus comprises: a first circulation tank (1), comprising a first inlet (11) and a first outlet (12) in communication with each other; a first circulation pump (2); a second circulation tank (3), comprising a second inlet (31) and a second outlet (32) in communication with each other; a second circulation pump (4); an electrochemical stack (5), having provided therein an anode chamber (52) and a cathode chamber (53) separated by a diaphragm (51), the anode chamber (52) being provided with an anode plate (54), and the cathode chamber (53) being provided with a cathode plate (55). The first outlet (12) is in communication with an inlet of the anode chamber (52) by means of the circulation pump (2), and an outlet of the anode chamber (52) is in communication with the first inlet (11); the second outlet (32) is in communication with an inlet of the cathode chamber (53) by means of the second circulation pump (4), and an outlet of the cathode chamber (53) is in communication with the second inlet (31). The present apparatus and method can extract lithium from lithium-containing solid-phase materials or liquid-phase materials, and the lithium extraction efficiency is high, achieving environmental protection effects.
The present application relates to the field of positive electrode material preparation, and provides an iron phosphate material, a preparation method therefor and a use thereof. According to the preparation method, modified nanocellulose having double bonds and carboxyl groups is used to form an iron phosphate seed. On the one hand, the modified nanocellulose is interspersed in iron phosphate of the seed, so that dispersion occurs in the interior of the seed, thereby reducing the grinding difficulty and improving the grinding efficiency, and thus facilitating obtaining small-particle-size iron phosphate. On the other hand, the modified nanocellulose undergoes cross-linking and forms a three-dimensional mesh coating on the surface of the seed, so that the seed has a high specific surface area and a large number of active groups to attract iron ions. Therefore, by using the obtained seed to further grow the iron phosphate material, the reaction can be greatly accelerated, thereby increasing the yield of the iron phosphate material.
The present disclosure relates to the technical field of lithium resources. Disclosed are a double-layer lithium-ion sieve fiber material, and a preparation method therefor and the use thereof. The double-layer lithium-ion sieve fiber material comprises a core layer and a coating layer. The core layer comprises a flexible carrier and a manganese ion sieve dispersed in the flexible carrier, wherein the flexible carrier is made of a soft polyvinyl chloride and a hydrophilic polyether sulfone, and a plurality of first holes are constructed in the flexible carrier. The coating layer comprises a rigid carrier and a titanium ion sieve dispersed in the rigid carrier, wherein the rigid carrier is made of polyparaphenylene terephthamide and polyhexamethylene adipamide, and a plurality of second holes are constructed in the flexible carrier. The double-layer lithium-ion sieve fiber material provided in the present disclosure is rigid outside and soft inside, has good water pressure resistance and fracture resistance; in addition, the manganese ion sieve has a low solution loss, and excellent cycle performance and lithium-ion adsorption performance, and can be widely used for extraction of lithium from brine.
B01J 20/28 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof characterised by their form or physical properties
56.
FLAKY LITHIUM MANGANATE, PREPARATION METHOD THEREFOR AND USE THEREOF
The present application provides flaky lithium manganate, a preparation method therefor and a use thereof. The preparation method comprises the following steps: (1) mixing an oil phase substance, an emulsifier and a divalent manganese salt with water to obtain an O/W emulsion; (2) mixing a permanganate solution with the O/W emulsion, and carrying out stirring for a reaction to obtain flaky trimanganese tetraoxide; and (3) mixing the flaky trimanganese tetraoxide with a lithium source, and carrying out sintering treatment to obtain the flaky lithium manganate. According to the present application, an emulsion method is utilized to prepare flaky lithium manganate having a stable structure; and the flaky lithium manganate can greatly shorten the transport pathway of lithium ions, improve the lithium ion extraction efficiency, increase the specific surface area of an electrode material, promote sufficient contact between lithium ions in an electrolyte and the electrode material, and further promote the transport of lithium ions.
C10G 45/12 - Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbonsHydrofinishing characterised by the catalyst used containing crystalline alumino-silicates, e.g. molecular sieves
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
57.
CARBON EMISSION ANALYSIS METHOD AND SYSTEM FOR LITHIUM-ION BATTERY, AND DEVICE AND MEDIUM
The present invention relates to the technical field of carbon emission analysis. Disclosed are a carbon emission analysis method and system for a lithium-ion battery, and a device and a medium. The method comprises: calculating fuel carbon emission data of an upstream enterprise, and usage-stage carbon emission data and recovery-stage carbon emission data of a lithium-ion battery; calculating correction coefficients on the basis of the fuel carbon emission data, the usage-stage carbon emission data and the recovery-stage carbon emission data; and calculating planned carbon emission data for the lithium-ion battery on the basis of planned carbon emission data of the upstream enterprise and the correction coefficients, wherein the planned carbon emission data comprises usage-stage planned carbon emission data and recovery-stage planned carbon emission data. In the present invention, an actual carbon emission amount of a lithium-ion battery is accurately calculated and a planned carbon emission amount is corrected by means of carbon emission correction coefficients, such that the difference between the carbon emission amount of an upstream enterprise of the lithium ion battery and the carbon emission amount of a downstream enterprise of the lithium ion battery is coordinated, thereby facilitating the establishment of an integrated carbon-emission-amount planning system for a whole industrial chain.
The present application provides a sintering process, a sintering system device, a target product and a use. The sintering process comprises: subjecting a water-containing and sulfur-containing substance to primary sintering to remove a first substance, and then subjecting same to secondary sintering to remove a second substance, so as to obtain a target product, wherein the primary sintering is n-stage sintering, n being an integer greater than or equal to 2; and the first substance comprises water, and the second substance comprises sulfur. In the sintering process of the present application, the traditional procedure of expansion drying can be omitted, and therefore the production costs and energy consumption are reduced, and the production process is simplified; and by sequentially performing the primary sintering and the secondary sintering, moisture and sulfur in the water-containing and sulfur-containing substance can be effectively removed, thereby reducing the sulfur content of the target product and the phenomenon of moisture condensation.
A method for the resource utilization of calcium fluoride residue and fluorine-containing wastewater. The method comprises: subjecting a leaching solution obtained by acid leaching of calcium fluoride residue to spray roasting, and dissolving and slurrying the resulting solid product to obtain a calcium salt solution; using a calcium salt solution, a sulfate solution, and a fluorine salt solution to prepare a first fluorine removal agent; subjecting the first fluorine removal agent and first fluorine-containing wastewater to a first-stage fluorine removal reaction to obtain first-stage fluorine-removed water and a second fluorine removal agent; and subjecting the second fluorine removal agent and second fluorine-containing wastewater to a second-stage fluorine removal reaction to obtain second-stage fluorine-removed water and a crude calcium fluoride product, wherein the fluorine concentration of the first fluorine-containing wastewater is less than the fluorine concentration of the second fluorine-containing wastewater. This method can not only obtain calcium fluoride products with relatively high purity, but also make the fluoride-containing wastewater meet discharge standards, realizing resource utilization of calcium fluoride residue and fluoride-containing wastewater, reducing the disposal cost of solid waste residue. The method has extensive economic and social benefits.
Provided in the present disclosure are an electrochemical lithium extraction electrode, an electrochemical lithium extraction device and a lithium extraction method. The electrochemical lithium extraction electrode comprises a cathode flow electrode and an anode flow electrode. The cathode flow electrode comprises a cathode active material, and the anode flow electrode comprises an anode active material, wherein the initial lithium content of each of the cathode active material and the anode active material is 20-80% of a theoretical lithium content of the active material. The present disclosure greatly increases the surface utilization rate of active materials, avoids the problems of detachment of active materials, etc., and is free of the problem of concentration polarization caused by traditional electrodes. Moreover, the electrochemical lithium extraction electrode greatly improves the lithium extraction capacity, eliminates the need to swap the cathode/anode of an electrolytic cell for reverse charging, and only needs replenishment or replacement of electrode materials, thus achieving simplicity and high efficiency; a continuous electrochemical lithium extraction process can be achieved at high voltage and high current density, thereby improving production efficiency.
The present disclosure provides an adsorbent for lithium extraction, and a preparation method therefor and the use thereof. The adsorbent for lithium extraction comprises at least one hollow penetrating columnar adsorbent for lithium extraction, and the hollow penetrating columnar adsorbent for lithium extraction is made of an aluminum-based adsorbent and a polymer. The adsorbent for lithium extraction in the present disclosure can achieve a capillary action by virtue of the unique structure thereof; brine to be subjected to lithium extraction can be separated from brine, which is not subjected to lithium extraction, during the lithium extraction process; the brine in a hollow position can be discharged by means of a negative pressure after lithium extraction; and the concentration of the brine can be prevented from being reduced during the lithium extraction process.
C02F 1/28 - Treatment of water, waste water, or sewage by sorption
B01J 20/28 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof characterised by their form or physical properties
B01J 20/30 - Processes for preparing, regenerating or reactivating
62.
PREPARATION METHOD FOR IRON PHOSPHATE WITH CORE-SHELL STRUCTURE AND USE THEREOF
A preparation method for iron phosphate with a core-shell structure and the use thereof. The method comprises: mixing a surfactant, an organic iron source, an organic phosphorus source, a waste oil coagulant and liquid oil at 60-90°C, adding the obtained mixed liquid to water to form an emulsion, separately adding a trivalent iron salt solution and a phosphate solution to the emulsion for a reaction, naturally cooling and filtering the reaction solution, and subjecting the obtained wet solid material to microwave heating in an oxygen atmosphere, so as to obtain iron phosphate with a core-shell structure.
A method for separating nickel and iron from a ferronickel-containing raw material, comprising: using oxalic acid as a leaching agent and a precipitating agent, leaving most of impurities such as calcium, chromium, copper, zinc, and silicon in a solution while precipitating nickel and iron, so as to achieve a certain impurity removal effect; then performing aerobic roasting on precipitates to produce ferric oxide and nickel oxide; and performing magnetic separation to obtain nickel oxide and ferric oxide with high purity, wherein the nickel oxide is used as a raw material for ion battery production, and the ferric oxide, as a by-product, can also be directly sold. The method has the advantages of a simple process, convenient utilization of the by-product ferric oxide, and a low yield of waste residues.
The present disclosure provides an iron(III) phosphate material, and a preparation method therefor and a use thereof. The preparation method comprises the following steps: (1) mixing 1,3,6,8-tetra(4-carboxyphenyl)pyrene with water, and adjusting the pH to induce reaction to obtain an organic framework solution; (2) mixing an iron salt with the organic framework solution, stirring to obtain a mixed solution, and mixing the mixed solution with a phosphoric acid source for reaction to obtain an iron(III) phosphate hydrate; and (3) aging the iron(III) phosphate hydrate, and performing sintering to obtain the iron(III) phosphate material. Flaky iron(III) phosphate is prepared in the present disclosure, and controllable morphology and in-situ carbon coating of lithium iron phosphate particles are achieved while improving the electronic conductivity and the ion migration capability of lithium iron phosphate.
Provided are a magnetic lithium extraction adsorbent, and a preparation method therefor and the use thereof. The preparation method comprises the following steps: (1) mixing an iron salt, a ferrous salt, an aluminum salt and a hydrophilic organic polymer with a solvent to obtain a mixed solution; (2) adding the mixed solution into an alkali-lithium salt-ammonium carbonate-ethanol mixed solution dropwise via an electrostatic spraying device by using an injection pump to obtain microspheres; and (3) carrying out a post-treatment on the microspheres to obtain a magnetic lithium extraction adsorbent. The adsorbent prepared by means of the method is magnetic and can realize solid-liquid separation by means of a magnet, without filtering brine and other operations, such that a lithium extraction process is simpler and more convenient.
B01J 20/02 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material
B01J 20/28 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof characterised by their form or physical properties
B01J 20/30 - Processes for preparing, regenerating or reactivating
C02F 1/28 - Treatment of water, waste water, or sewage by sorption
66.
METHOD FOR PREPARING NANO-FLAKE CALCIUM SULFATE FROM PHOSPHOGYPSUM, NANO-FLAKE CALCIUM SULFATE AND USE THEREOF
A method for preparing nano-flake calcium sulfate from phosphogypsum, nano-flake calcium sulfate and a use thereof, relating to the technical field of waste recovery. The method comprises: pretreating phosphogypsum to obtain purified gypsum; mixing an inorganic salt with an alcohol solution containing a crystal form regulator and clarifying same, and then carrying out aging to obtain a crystallization template solution, wherein the crystal form regulator is a composition of piceatannol and 1,2-bis(4-pyridyl)ethylene; and slurrying and reacting the purified gypsum and the crystallization template solution, and after the reaction is completed, carrying out post-treatment to obtain the nano-flake calcium sulfate. The crystal morphology of calcium sulfate can be regulated and controlled; and the growth of crystal plane {111} is inhibited, such that crystal growth on a two-dimensional plane is achieved, thereby forming flaky crystals. The crystal growth environment is relatively stable and is not prone to being affected by impurities; and the prepared nano-flake calcium sulfate has good dispersibility and is not prone to agglomeration.
A porous ferric phosphate precursor, a lithium iron phosphate material, and a preparation method therefor, relating to the technical field of positive electrode materials. When the porous ferric phosphate material precursor is used in batteries, the wetting area in an electrolyte can be increased and the diffusion path of Li+ ions can be shortened, thereby improving the rate performance of batteries and low-temperature performance of batteries; the electronic conductivity of batteries can also be increased. Moreover, the preparation method is simple to operate and beneficial to actual production.
C01B 25/45 - Phosphates containing plural metal, or metal and ammonium
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
68.
IRON PHOSPHATE MATERIAL AND PREPARATION METHOD THEREFOR
An iron phosphate material and a preparation method therefor, relating to the technical field of materials. According to the method, a hydrothermal system having high cost performance is still used as a basis; when raw materials are conventionally introduced, urea-intercalated halloysite nanotubes are used as additives for mixing; the urea-intercalated halloysite nanotubes can slowly release urea in a hydrothermal process to maintain a stable pH balance of the system; and the urea in intercalation layers has improved high-temperature stability and is prevented from rapid decomposition due to high temperature and high pressure of the hydrothermal system in an initial phase of a reaction, so that the final prepared iron phosphate material has an ideal structural morphology. The lithium iron phosphate positive electrode material prepared from an iron phosphate precursor obtained by the method has excellent electrochemical performance.
C01B 25/45 - Phosphates containing plural metal, or metal and ammonium
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
A preparation method for iron phosphate, relating to the technical field of material synthesis. The method comprises: introducing a pH-sensitive agent, i.e., chitosan, as a modifier into the process of synthesizing iron phosphate by means of coprecipitation, adsorbing and aggregating hydrated iron phosphate particles and precipitating same during coprecipitation, adjusting a pH value so that a solution is alkaline, then further forming a layer of basic iron phosphate salt on the surfaces of the crystal grains, and chitosan becoming hydrophobic and rapidly precipitating. Therefore, the crystal grain agglomeration and recrystallization phenomena are inhibited, and the prepared particles are small in size and uniform in size; after sintering, the basic iron phosphate salt and chitosan can endow the iron phosphate with a loose morphology, thereby being conducive to improving the lithium deintercalation performance of the finally prepared lithium iron phosphate.
The present invention relates to the technical field of waste recovery, and provides a method for preparing a hemihydrate gypsum powder from phosphogypsum by means of an atmospheric salt solution process, and a hemihydrate gypsum powder. The method comprises: preparing a slurry from a mixed liquid of a salt and a crystal modifier and purified phosphogypsum, wherein the crystal modifier is a betaine compound with pH responsiveness; and adjusting the pH value of the slurry on the basis of the isoelectric point of the crystal modifier and the required length-diameter ratio of hemihydrate gypsum crystals, subjecting the slurry to a constant-temperature dynamic reaction, and filtering same, thereby obtaining a hemihydrate gypsum powder, wherein when the pH value of the slurry is greater than the isoelectric point of the crystal modifier, the length-diameter ratio of the hemihydrate gypsum crystals increases, and when the pH value of the slurry is less than the isoelectric point of the crystal modifier, the length-diameter ratio of the hemihydrate gypsum crystals decreases. By using the betaine compound as the crystal modifier, hemihydrate gypsum crystals with different length-diameter ratios can be obtained by adjusting the pH value of the slurry, and therefore the regulation and control of the crystal morphology of hemihydrate gypsum are achieved and exhibit a certain pattern.
Iron phosphate as well as a preparation method therefor and the use thereof. The method comprises: preparing a precursor solution from an iron source, a phosphate source, an amide substance and a first solvent, filling a mesoporous material with the precursor solution to form a filling body; then adding a second solvent which is immiscible with the first solvent and has a different density, and wrapping the filling body in the second solvent, so as to seal the precursor solution in the cavities or pore channels in the mesoporous material, such that the mesoporous material has blocking and limiting effects, and the precursor solution in the cavity or the pore channel can generate, after reaction, iron phosphate particles smaller than the volume of the cavity; and then calcinating same to remove the mesoporous material, so as to obtain discrete iron phosphate particles having a small particle size.
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
B82Y 40/00 - Manufacture or treatment of nanostructures
72.
MODIFIED LITHIUM EXTRACTION ADSORBENT, AND PREPARATION METHOD AND USE THEREFOR
A modified lithium extraction adsorbent, and a preparation method and use therefor. The preparation method comprises the following steps: (1) mixing activated aluminum oxide with a lithium salt solution, and carrying out a heating reaction to obtain an adsorbent precursor; (2) mixing a phenyllithium solution with the adsorbent precursor, carrying out ultrasonic treatment, adding a chlorotriphenylmethane-containing solution, reacting to obtain a tetraphenylmethane-coated aluminum-based adsorbent; (3) carrying out plasma hydrophilic treatment on the tetraphenylmethane-coated aluminum-based adsorbent to obtain a modified lithium extraction adsorbent. The outer-layer modified layer of the modified lithium extraction adsorbent can improve the cycling stability of the adsorbent, and can physically adsorb lithium ions in the brine, such that the inner-layer adsorbent is protected while the adsorption capacity is not reduced.
B01J 20/30 - Processes for preparing, regenerating or reactivating
B01J 20/28 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof characterised by their form or physical properties
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
74.
METHOD FOR REMOVING FERROUS IRON FROM LATERITE-NICKEL ORE BY HIGH-PRESSURE ACID LEACHING
The present disclosure provides a method for removing ferrous iron from laterite-nickel ore by high-pressure acid leaching, comprising the following steps: S1, pulping laterite-nickel ore, preheating the slurry, and mixing the slurry with a sulfuric acid compound and a nitric acid compound for heating, pressurizing and acid leaching to obtain an acid-leached slurry; and S2, carrying out flash evaporation on the acid-leached slurry to obtain a slurry leachate, wherein steam generated by flash evaporation is used for the preheating process of the slurry in step S1.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
76.
DETERMINATION METHOD FOR CONTENT OF COBALT IN COBALTOSIC OXIDE MATERIAL
The present invention relates to the technical field of cobalt content determination, and disclosed is a determination method for the content of cobalt in a cobaltosic oxide material. The determination method comprises: calcining a cobaltosic oxide sample in an inert atmosphere to completely react cobaltosic oxide into cobaltous oxide; using hydrochloric acid to digest a calcined product obtained by calcination to obtain a digestion solution; using a potassium ferricyanide solution as a titrant to perform potentiometric titration on the digestion solution, wherein the titration process comprises: reacting an excess of the potassium ferricyanide solution with the digestion solution to completely react divalent cobalt in the digestion solution into trivalent cobalt, and then titrating the remaining unreacted potassium ferricyanide solution in a titration system with a cobalt standard solution until a jump point is reached; then calculating the content of cobalt in the sample on the basis of a formula. The method is simple and safe, and provides highly accurate and stable test results.
G01N 31/16 - Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroupsApparatus specially adapted for such methods using titration
77.
POSITIVE ELECTRODE LITHIUM-SUPPLEMENTING AGENT, AND PRECURSOR THEREOF, PREPARATION METHOD THEREFOR AND USE THEREOF
222 to form a good solid solution, thereby realizing the effect of reducing the sintering temperature and facilitating obtaining a high-purity lithium-supplementing material. The positive electrode lithium-supplementing agent prepared from the precursor has low hygroscopicity and high stability.
H01M 4/485 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
78.
TERNARY PRECURSOR, AND SYNTHESIS METHOD THEREFOR AND USE THEREOF
Provided in the present disclosure are a ternary precursor, and a synthesis method therefor and the use thereof. The synthesis method comprises: adding a mixed solution containing a metal salt and a complexing agent and liquid caustic soda into a reaction container in a parallel flow manner, so as to perform a first co-precipitation reaction, adjusting the reaction temperature until a reaction product grows to a target particle size, so as to perform a second co-precipitation reaction, and aging same to obtain a nickel-cobalt-manganese precursor, wherein the complexing agent comprises sodium N,N-dicarboxyamino-2-hydroxypropanesulphonate. In the present disclosure, sodium N,N-dicarboxyamino-2-hydroxypropanesulphonate is used as a complexing agent, and the morphology of a sample is adjusted by using different complexing capabilities of the complexing agent to metal ions under high and low temperature conditions, so as to synthesize a product having densely stacked internal primary particles, a loose external morphology and orientated shell whiskers; and the product can have the characteristics of both a large BET specific surface area, a high TD and a relatively low impurity content.
The present invention belongs to the technical field of batteries. Disclosed are an iron(III) phosphate material, a preparation method therefor, and a use thereof. The iron(III) phosphate material comprises a carbon quantum dot core located internally and an iron(III) phosphate shell formed on the surface of the carbon quantum dot core, and the surface of the iron(III) phosphate shell is provided with a carbon coating layer formed from a carbon-containing dispersing agent. The iron(III) phosphate material is nanoscale iron(III) phosphate and has a uniform crystal size. The preparation method therefor comprises the following steps: mixing a first mixed solution containing a divalent iron salt and carbon quantum dots, a second mixed solution containing a phosphate and a dispersing agent, and an oxidizing agent to undergo a reaction to obtain iron(III) phosphate dihydrate; and annealing and calcining the iron(III) phosphate dihydrate. The iron(III) phosphate material can be further used for preparing a lithium iron phosphate positive electrode material and a battery.
The present disclosure belongs to the technical field of resource recycling and battery materials, and particularly relates to a regeneration method for iron phosphate waste. The regeneration method comprises the following steps: (1) calcining iron phosphate waste, then mixing the calcined iron phosphate waste with an acid solution and an oxidizing agent, and heating the mixture to perform a hydrothermal reaction; and (2) subjecting the slurry obtained by the reaction in step (1) to solid-liquid separation, and washing and sintering the obtained solid phase to obtain regenerated iron phosphate.
Provided in the present application are an RMS-based accounting and tracing method and apparatus for the proportion of a recycled material, and a storage medium. The method comprises: collecting production material data within a preset system boundary range on a production line, wherein the production material data comprises the proportion of externally purchased salt in an element i of salt used in the production of a raw material of a self-produced positive electrode material, the proportion of a recycled material in the element i of the externally purchased salt, the proportion of self-produced salt in the element i of the salt used in the production of the raw material of the self-produced positive electrode material, and the proportion of a recycled material in the element i of the self-produced salt, and the salt used in the production of the raw material of the self-produced positive electrode material comprises the self-produced salt and the externally purchased salt; and on the basis of the production material data and a preset accounting formula for the proportion of a recycled material in the element i of the raw material of the self-produced positive electrode material, obtaining the proportion of the recycled material in the element i of the raw material of the self-produced positive electrode material. By using the present application, the proportion of a recycled material can be precisely accounted.
2222-MIL-53(Al) powder to prepare a dispersion, mixing the dispersion with an iron salt solution, stirring and then drying the mixture, mixing the resulting powder with a phosphorus source solution, controlling the pH, and carrying out a reaction; and (3) carrying out sintering treatment on a material resulting from aging to obtain the modified iron(III) phosphate. Provided are iron(III) phosphate prepared according to the method and a positive electrode material. In the method, a hollow metal organic framework nanomaterial is used as a template to provide a micro reaction area for the synthesis of iron(III) phosphate, so that the microscopic morphology of the prepared iron(III) phosphate is restrained and controlled to prepare nanoscale iron(III) phosphate having a polyhedral structure.
A method for resource utilization of laterite-nickel ore, belonging to the technical field of the treatment of laterite-nickel ore. The method comprises: performing high-pressure acid leaching and solid-liquid separation on laterite-nickel ore to obtain a leachate and a leaching residue; adjusting the pH value of the leachate to 2.0-5.0 and performing solid-liquid separation to obtain an adjusted solution and an adjustment residue; performing ion exchange on the adjusted solution by means of an ion exchange resin to obtain an adsorbent resin having adsorbed nickel ions from the adjusted solution and the adsorption residual liquid; and using an acid to desorb the adsorbent resin and performing ion exchange membrane treatment on a nickel-containing desorption acid solution obtained after desorption, so as to separate a nickel salt from the acid to obtain a nickel salt solution to be purified. The method is simple, has a low cost, and can stably and reliably recover a metal such as nickel.
Disclosed in the present disclosure are a phosphogypsum building material and a preparation method therefor. The phosphogypsum building material comprises an alkaline excitation material, fly ash, and an unsaturated carboxylic acid water reducing agent, wherein the water reducing agent can exert an original water reducing effect of the water reducing agent; furthermore, the water reducing agent facilitates slow release of Ca2+ from phosphogypsum hemihydrate, thereby exerting a retarding effect, and accelerates the dissolution of fly ash glass phases, thereby promoting a hydration process thereof, and a complex formed with an unsaturated carboxylic acid can act as a filler to fill in gaps between crystals of a gel material, thereby enhancing the strength of the material. Compared with an ordinary polycarboxylic acid water reducing agent, the phosphogypsum building material of the present disclosure has a better retarding effect, and a building material test piece obtained thereby has better mechanical properties.
C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
444444 core-shell material prepared according to the present disclosure has a relatively high ion conduction capability, can compensate for the deficiency of large Li+44-water interface, and can facilitate the conduction of Li+444 core-shell material prepared according to the present disclosure can be widely applied to the extraction of lithium from salt lake brine.
A composite positive electrode material precursor, a preparation method therefor and a use thereof. The composite positive electrode material precursor comprises a porous iron phosphate core, a carbon-coated inner layer covering the surface of the core and doped with metal phosphide, and an iron phosphate-coated outer layer covering the surface of the carbon-coated inner layer; and at least part of the carbon-coated inner layer is arranged in pores of the porous iron phosphate core. The surface and pores of the porous iron phosphate core are provided with the carbon-coated inner layer doped with the metal phosphide, so that the electrical conductivity of the material can be significantly improved, the use of conductive carbon is reduced, and the tap density can be prevented from being greatly reduced while improving the rate performance and low-temperature performance of the material. In addition, forming the iron phosphate-coated outer layer on the surface of the carbon-coated inner layer effectively avoids direct contact between the metal phosphide and an electrolyte and reduces side reactions, thereby improving the cycle performance of lithium ion batteries.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
87.
IRON(III) PHOSPHATE, PREPARATION METHOD THEREFOR, AND USE THEREOF
The present disclosure provides iron(III) phosphate, a preparation method therefor, and a use thereof. The preparation method comprises: using dendritic poly(propylene imine) as a medium to replace alkaline substances in the prior art to adjust pH, so that iron(III) phosphate is produced, and at the same time the iron(III) phosphate can precipitate and grow on a dendritic structure of the dendritic poly(propylene imine) by means of a coordination effect; and finally, removing the poly(propylene imine) at a high temperature to obtain the iron(III) phosphate containing a three-dimensional dendritic network channel. The preparation method does not introduce other impurities, effectively reduces the presence of alkalis in coprecipitation wastewater, and reduces the wastewater treatment cost; moreover, the three-dimensional dendritic network channel makes the iron(III) phosphate easier to grind, and the channel can shorten the lithium-ion transmission distance during the subsequent preparation for lithium iron phosphate, thereby improving the electrical performance of the lithium iron phosphate.
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
A recovery method for a cobalt intermediate. The cobalt intermediate is firstly pulped, and is sequentially subjected to neutral leaching, reduction acid leaching and high-acid leaching, wherein trivalent cobalt is reduced into divalent cobalt, while ferrous iron is oxidized into ferric iron during the neutral leaching process, and most cobalt can be leached by means of neutral leaching, while impurities, such as copper and aluminum, are co-precipitated together with ferric hydroxide; high-valence cobalt in neutral leaching residues is reduced into divalent cobalt ions by means of reduction acid leaching, thereby achieving the efficient leaching of neutral residues; and the acid leaching residues obtained after reduction acid leaching are subjected to high-acid leaching to recover cobalt metal in the acid leaching residues to the maximum extent, thereby improving the recovery rate of cobalt.
The present disclosure belongs to the field of resource recovery. The present disclosure provides a method for separating and recovering nickel and iron from a nickel-iron material. The method comprises: carrying out acid leaching on a nickel-iron material, adjusting a leachate to remove chromium and aluminum impurities, adding a reducing agent to the impurity-removed solution to reduce iron ions, and then using a resin to adsorb nickel ions from the solution to obtain a saturated resin and an iron-containing solution, thereby realizing the separation of nickel from iron; and desorbing the saturated resin having adsorbed the nickel ions to obtain a nickel-containing solution, wherein the nickel-containing solution and the iron-containing solution can undergo subsequent treatment to obtain nickel and iron products. Compared with a conventional recovery process, the present disclosure involves using the resin, so that not only is the nickel concentration enriched, thereby separating iron from nickel in a high-selectivity manner, but also a complex impurity removal and purification process is omitted, and the resin can be recycled after being desorbed, so that the technological process is greatly economized, and the recovery cost is reduced.
C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
90.
RMS-BASED ACCOUNTING AND TRACING METHOD AND APPARATUS FOR RECOVERED MATERIAL, AND DEVICE AND STORAGE MEDIUM
Provided in the present invention are an RMS-based accounting and tracing method and apparatus for a recovered material, and a device and a storage medium. The method comprises: recycling a recovered positive electrode material from a waste battery, and collecting process parameters on a recovered positive electrode material production line, wherein the process parameters comprise: a first mass of an element of the waste battery in a mixed precursor, a second mass of the element of the waste battery in the recovered positive electrode material, a first proportion of a recovered material, which is from the element of the waste battery, in an externally purchased precursor, an external purchase rate of the element of the waste battery in a precursor, a second proportion of the recovered material, which is from the element of the waste battery, in externally purchased crude salt, and a third proportion of the element of the waste battery in externally purchased metal salt used in precursor production; and on the basis of a nonlinear relationship between the first mass, the first proportion, the external purchase rate, the second proportion and the third proportion and the second mass, acquiring the proportion of a recovered material of the element. By means of the present invention, the technical gap of it being impossible to trace the proportion of a recovered material in a recycling industry chain can be filled, and the proportion of the recovered material can be precisely traced, thereby improving the recycling supervision efficiency.
Provided are α-cobalt hydroxide, a preparation method therefor, and the use thereof. The preparation method comprises the following steps: (1) mixing a cobalt salt, an intercalation agent and a solvent to obtain a mixed solution; and (2) injecting in parallel flow the mixed solution and a caustic soda solution into a base solution to undergo a coprecipitation reaction, so as to obtain a cobalt hydroxide slurry; and (3) carrying out solid-liquid separation on the cobalt hydroxide slurry, washing same with a washing agent containing the intercalation agent, and drying same to obtain α-cobalt hydroxide. Mixing the cobalt salt and the intercalation agent first, and then performing the coprecipitation reaction with the caustic soda solution enable the cobalt hydroxide structure to be stably generated, and prevent interlayer collapse, thereby obtaining spherical α-cobalt hydroxide which has perfect crystallinity and dense primary particle intercalation.
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
92.
POROUS IRON PHOSPHATE, PREPARATION METHOD THEREFOR AND USE THEREOF
The present disclosure relates to the technical field of battery materials, and in particular to porous iron phosphate, a preparation method therefor and a use thereof. The preparation method comprises the following steps: (1) mixing an iron source, a phosphorus source and an oxidizing solution, adding a pH regulator, and synthesizing a crude iron phosphate hydrate; (2) mixing the crude iron phosphate hydrate prepared in the step (1) with an aging solution for aging, performing solid-liquid separation, and then washing to obtain a solid; and (3) sintering the solid obtained in the step (2) to obtain the porous iron phosphate. The preparation method can effectively remove impurity elements, the prepared porous iron phosphate has high compaction density, and the endurance capability of batteries can be effectively improved.
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
93.
LITHIUM IRON PHOSPHATE MATERIAL HAVING HIGH COMPACTION DENSITY AND LOW SPECIFIC SURFACE AREA, AND PREPARATION METHOD THEREFOR
xyz44/C, wherein 0.97≤x≤1.03, 0.95≤y≤1.01, 0＜z≤0.05, and Me is selected from at least one of Mg, Ti, B, V, Zr or Nb. The coating layer is composed of at least one element of C, Li, Mg, B, Ti, P or O. The carbon content of the positive electrode material is 1.05-1.45%; the BET range of the base material is: 10.6≤BET≤13.0 m2/g; and the compaction density of the lithium iron phosphate positive electrode material is 2.58-2.72 g/cm3.
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
94.
MODIFIED FERRIC PHOSPHATE MATERIAL, PREPARATION METHOD THEREFOR, AND USE THEREOF
Provided in the present disclosure are a modified ferric phosphate material, a preparation method therefor, and the use thereof. The preparation method comprises the following steps: (1) mixing dopamine hydrochloride and F127 with a solvent, and adding trimethylbenzene, so as to obtain a nano-emulsion; and (2) adjusting the pH of the nano-emulsion, then adding an initiator to polymerize dopamine hydrochloride, adding a ferric salt for adsorption, and adding a phosphorus source to obtain a precursor; and (3) sintering the precursor to obtain the modified ferric phosphate material. The present disclosure uses the F127, TMB and dopamine to form a dendritic structure, and uses dopamine to complex Fe3+to form ferric phosphate having a dendritic structure, which, together with ferric phosphate formed by free iron ions and ferric phosphate formed by Fe3+ that is complexed with dopamine not having the dendritic structure, constitutes ferric phosphate particles containing a carbon channel skeleton therein.
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
95.
HEAVY-METAL CAPTURING AGENT, AND PREPARATION METHOD THEREFOR AND USE THEREOF
The present disclosure belongs to the technical field of water treatment. Provided are a heavy-metal capturing agent, and a preparation method therefor and the use thereof. In the present disclosure, calcium sulfate hemihydrate crystal whiskers are first prepared from phosphogypsum; a silylamino group is grafted onto a hydroxyl group of the calcium sulfate hemihydrate crystal whiskers by means of primary modification; double bonds are then introduced by means of secondary modification; and a sulfydryl compound is then grafted by means of a sulfydryl-alkenyl click chemical reaction, thereby obtaining a heavy-metal capturing agent. The heavy-metal capturing agent contains a hydroxyl group, an amino group and a sulfydryl group at the same time, and therefore the heavy-metal capturing agent can adsorb heavy metals in heavy-metal wastewater by means of physical and chemical adsorption effects, so as to achieve the purpose of removing the heavy metals.
B01J 20/04 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
C02F 1/28 - Treatment of water, waste water, or sewage by sorption
C08K 9/06 - Ingredients treated with organic substances with silicon-containing compounds
C08K 9/04 - Ingredients treated with organic substances
A salt lake lithium extraction electrode, a preparation method therefor and the use thereof. The preparation method comprises the following steps: (1) mixing an active substance, a conductive agent, a non-aqueous binder and a water-soluble polymer having a molecular weight of 100-800 with a solvent to obtain a paste; (2) coating a current collector with the paste to obtain an electrode, and immersing the electrode in water for soaking treatment; and (3) immersing the electrode subjected to the soaking treatment into an oxidizing agent solution, carrying out an oxidation reaction, and then immersing the electrode in water to terminate the oxidation reaction, so as to obtain the salt lake lithium extraction electrode. Adding the water-soluble polymer into the paste of the salt lake lithium extraction electrode and removing the water-soluble polymer by means of soaking enable nanoscale pores to be formed in the electrode; the removal of the water-soluble polymer can increase the specific surface area of the electrode, and in addition, the nanoscale pores also increase the structural stability of the electrode.
An electrode for extracting lithium from a salt lake and a preparation method therefor and use thereof. The preparation method comprises the following steps: (1) mixing an active substance, a conductive agent, a binder and a solvent to obtain a slurry, and coating the slurry on a collector to obtain an electrode; (2) immersing the electrode in a non-solvent, and then soaking the electrode after curing; and (3) oxidizing the soaked electrode to obtain the electrode for extracting lithium from a salt lake. The solvent and the non-solvent are mutually soluble in any proportion, and the interaction parameter of the non-solvent and the binder is > 0.5. The resulting electrode for extracting lithium from a salt lake forms uniform pores inside a electrode plate, the connectivity between the pores is stronger, and the specific surface area of the electrode plate is larger, so that a drying step is not required, the process flow can be simplified and the workload can be reduced; in addition, surface cracks of the electrode plate can be reduced, and the strength and service durability of the electrode plate can be improved.
Disclosed is a battery power iron removal magnetic separation device, comprising a body (1) in which an accommodating space (11) is provided, a feeding port (12) being provided at one end of the body (1), and a first discharging port (13) and a second discharging port (14) being provided at the other end of the body (1); a conveying mechanism (2) comprising an electric motor (21) and a screw (22); a magnetic separation mechanism (3) arranged in the accommodating space (11) and located above the conveying mechanism (2), the magnetic separation mechanism (3) comprising a conveyor belt (31) which comprises a first horizontal section (31a), a second horizontal section (31b), a first end section (31c) and a second end section (31d), wherein the first horizontal section (31a) is arranged above the second horizontal section (31b), the first end section (31c) and the second end section (31d) are arranged at either end of the first horizontal section (31a) and the second horizontal section (31b), and are distributed in a feeding direction of the conveying mechanism (2), and the second end section (31d) is arranged above the second discharging port (14); a conveyor wheel (32) for maintaining a smooth movement of the conveyor belt (31); electromagnetic rods (33) arranged on a surface of the conveyor belt (31); and an electrified rail (34) mounted on an inner wall of the body (1). The device can operate continuously with high magnetic separation efficiency.
Flaky iron phosphate, and a preparation method therefor and the use thereof. The preparation method for the flaky iron phosphate comprises the following steps: mixing oleyl alcohol and a low alcohol having 1-4 carbon atoms until uniform, and sequentially adding a ferric salt solution and a solution containing phosphate radicals, so as to obtain a first solution; and subjecting the first solution to a hydrothermal reaction, and after the reaction is completed, filtering, washing, drying and calcining a product, so as to obtain flaky iron phosphate. Lithium iron phosphate prepared by using the flaky iron phosphate as a raw material has relatively good charge-discharge performance when being used as a positive electrode material of a battery.
C01B 25/45 - Phosphates containing plural metal, or metal and ammonium
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
Disclosed in the present application is a preparation method for iron(III) phosphate, relating to the technical field of battery material preparation. The iron(III) phosphate preparation method uses an iron-nickel dissolved solution as a preparation raw material; appropriate heat treatment is performed on a prepared iron(III) phosphate crude product, so that changes occur on the crystal form surface of the iron(III) phosphate crude product, and nickel ions bound within easily separate from the crystal; and subsequent washing can greatly reduce the nickel content in the iron(III) phosphate.
