Abrégé

The present invention relates to a sulfide-based solid electrolyte including elemental lithium (Li), elemental phosphorus (P), elemental sulfur (S), and an elemental halogen (Ha), and having an argyrodite-based crystal structure, wherein at least a portion of the crystal structure is doped with a first compound including a Group 13 element (M) and a second compound including elemental oxygen (O).

Classes IPC  ?

• H01M 10/0562 - Matériaux solides
• H01M 10/42 - Procédés ou dispositions pour assurer le fonctionnement ou l'entretien des éléments secondaires ou des demi-éléments secondaires
• H01M 10/0585 - Structure ou fabrication d'accumulateurs ayant uniquement des éléments de structure plats, c.-à-d. des électrodes positives plates, des électrodes négatives plates et des séparateurs plats

Abrégé

gggg is the glass transition temperature of the dried intermediate product.

Classes IPC  ?

• H01M 10/0562 - Matériaux solides
• H01M 10/0585 - Structure ou fabrication d'accumulateurs ayant uniquement des éléments de structure plats, c.-à-d. des électrodes positives plates, des électrodes négatives plates et des séparateurs plats
• H01M 10/052 - Accumulateurs au lithium

Abrégé

The present invention relates to a method for manufacturing a sulfide-based solid electrolyte, the method comprising the steps of: (S1) preparing a precursor solution by adding a precursor containing an alkali metal sulfide, a phosphorus sulfide, and a halogen compound to a solvent; (S2) performing first milling on the precursor solution to prepare an intermediate product; (S3) adding a dispersant after the step (S2) and then performing second milling to adjust the particle size of the intermediate product; (S4) drying the particle size-adjusted intermediate product after the step (S3); and (S5) heat-treating the dried intermediate product, wherein the dispersant is an aliphatic compound, and the mass ratio of the solvent and the dispersant is 75: 1 to 150: 1.

Classes IPC  ?

• H01M 10/0562 - Matériaux solides

Abrégé

The present invention relates to a method for preparing an alkali metal sulfide, comprising the steps of: mixing a precursor and a first reducing agent to form a mixture; reducing the mixture together with a second reducing agent to obtain an alkali metal sulfide; dissolving and purifying the obtained alkali metal sulfide in a polar solvent; and drying the purified alkali metal sulfide.

Classes IPC  ?

• C01B 17/28 - Préparation par réduction avec des gaz réducteurs
• C01B 17/26 - Préparation par réduction avec du charbon
• C01B 17/36 - Purification

Abrégé

The present invention relates to a sulfide-based solid electrolyte comprising a lithium element, a phosphorus element, a sulfur element, a halogen element, and a boron-based element while comprising an argyrodite-based compound having an argyrodite crystal structure. The sulfide-based solid electrolyte of the present invention can exhibit improvements in electrochemical stability and stability in the air by substitution of some in the crystal structure with boron-based elements.

Classes IPC  ?

• H01M 10/0562 - Matériaux solides
• H01M 10/052 - Accumulateurs au lithium
• C01B 25/14 - Composés de phosphore et de soufre, sélénium ou tellure
• H01B 1/10 - Conducteurs ou corps conducteurs caractérisés par les matériaux conducteurs utilisésEmploi de matériaux spécifiés comme conducteurs composés principalement d'autres substances non métalliques sulfures

Abrégé

The present invention relates to a composite positive electrode active material comprising: a first electrolyte layer disposed on the active material; and a second electrolyte layer disposed on the first electrolyte layer, wherein the first electrolyte layer is contained at 2.5 wt% to 5.0 wt% relative to the active material. The composite positive electrode active material of the present invention has thin and uniform electrolyte coating layers formed on the surface thereof, thereby enhancing electrochemical performance and rate capability in an all-solid-state battery.

Classes IPC  ?

• H01M 4/36 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs
• H01M 4/02 - Électrodes composées d'un ou comprenant un matériau actif

Abrégé

A method of preparing a sulfide-based solid electrolyte according to embodiments comprises mixing a solvent and precursors in a reactor. In the reactor, an open vacuum atmosphere is formed. While maintaining the open vacuum atmosphere in the reactor, a mixture inside the reactor may undergo a reaction under conditions of stirring or applying ultrasonic waves. Accordingly, a high-purity sulfide-based solid electrolyte may be prepared with high efficiency.

Classes IPC  ?

• H01M 10/0562 - Matériaux solides

Abrégé

One embodiment of the present disclosure includes a method of producing high-purity alkali metal sulfide including mixing an alkali metal sulfide salt precursor and a reducing agent to form a mixture, reducing the mixture to obtain alkali metal sulfide; and purifying the obtained alkali metal sulfide.

Classes IPC  ?

• C01B 17/36 - Purification

Abrégé

A method of preparing a sulfide-based solid electrolyte according to embodiments comprises mixing a solvent and a precursor in a reactor. An open vacuum atmosphere may be formed within the reactor. The mixture inside the reactor may be caused to react by stirring or under conditions of applying ultrasonic waves while maintaining the open vacuum atmosphere within the reactor. Accordingly, a high-purity sulfide-based solid electrolyte may be prepared with high efficiency.

Classes IPC  ?

• H01M 10/0562 - Matériaux solides

Abrégé

Provided are a method for preparing a sulfide-based solid electrolyte, a sulfide-based solid electrolyte prepared by the method, and an all-solid-state lithium secondary battery including the sulfide-based solid electrolyte. The method includes a) mixing Li2S with P2S5 to prepare a mixed powder, b) placing the mixed powder, an ether, and stirring balls in a container, sealing the container, followed by stirring to prepare a suspension, and c) stirring the suspension under high-temperature and high-pressure conditions to prepare sulfide-based solid particles.

Classes IPC  ?

• H01M 10/0562 - Matériaux solides

Abrégé

In a method for preparing a sulfide-based solid electrolyte according to embodiments, a solvent and a precursor are mixed in a reactor. An open vacuum atmosphere is formed in the reactor. While the open vacuum atmosphere in the reactor is maintained, the mixture in the reactor is subjected to a reaction under stirring or ultrasonic application conditions. A high-purity sulfide-based solid electrolyte can be prepared with high efficiency.

Classes IPC  ?

• C01B 25/14 - Composés de phosphore et de soufre, sélénium ou tellure
• H01B 1/06 - Conducteurs ou corps conducteurs caractérisés par les matériaux conducteurs utilisésEmploi de matériaux spécifiés comme conducteurs composés principalement d'autres substances non métalliques
• H01B 1/10 - Conducteurs ou corps conducteurs caractérisés par les matériaux conducteurs utilisésEmploi de matériaux spécifiés comme conducteurs composés principalement d'autres substances non métalliques sulfures
• H01M 10/0562 - Matériaux solides

Abrégé

An embodiment of the present invention discloses a method for producing a high-purity alkali metal sulfide, the method comprising the steps of: mixing an alkali metal sulfide salt precursor and a reducing agent to form a mixture; reducing the mixture to obtain an alkali metal sulfide; and purifying the obtained alkali metal sulfide.

Classes IPC  ?

• C01B 17/26 - Préparation par réduction avec du charbon
• C01B 17/28 - Préparation par réduction avec des gaz réducteurs
• C01B 17/36 - Purification
• C01B 17/38 - Déshydratation
• C01B 17/40 - Fabrication de produits de forme déterminée, p. ex. granulés

Abrégé

In a method for preparing a sulfide-based solid electrolyte according to embodiments, a solvent and a precursor are mixed in a reactor. An open vacuum atmosphere is formed in the reactor. While maintaining the open vacuum atmosphere in the reactor, the mixture inside the reactor is reacted under conditions of stirring or of application of ultrasonic waves. A high-purity sulfide-based solid electrolyte can be prepared with high efficiency.

Classes IPC  ?

• C01B 25/455 - Phosphates halogénés
• H01M 10/0562 - Matériaux solides
• H01B 1/06 - Conducteurs ou corps conducteurs caractérisés par les matériaux conducteurs utilisésEmploi de matériaux spécifiés comme conducteurs composés principalement d'autres substances non métalliques

Abrégé

2S [Formula 2] AX wherein A represents an alkali metal, and X represents an element of the halogen group.

Classes IPC  ?

• H01M 10/0562 - Matériaux solides
• H01M 10/0525 - Batteries du type "rocking chair" ou "fauteuil à bascule", p. ex. batteries à insertion ou intercalation de lithium dans les deux électrodesBatteries à l'ion lithium
• H01M 10/0585 - Structure ou fabrication d'accumulateurs ayant uniquement des éléments de structure plats, c.-à-d. des électrodes positives plates, des électrodes négatives plates et des séparateurs plats
• C01B 25/14 - Composés de phosphore et de soufre, sélénium ou tellure

Abrégé

5 to prepare a mixed powder, b) placing the mixed powder, an ether, and stirring balls in a container, sealing the container, followed by stirring to prepare a suspension, and c) stirring the suspension under high-temperature and high-pressure conditions to prepare sulfide-based solid particles.

Classes IPC  ?

• H01M 10/00 - Éléments secondairesLeur fabrication
• H01M 10/0525 - Batteries du type "rocking chair" ou "fauteuil à bascule", p. ex. batteries à insertion ou intercalation de lithium dans les deux électrodesBatteries à l'ion lithium
• H01M 10/0562 - Matériaux solides