Abstract

High purity MnO and zinc oxide may be efficiently recovered from alkaline and/or carbon zinc batteries using a process involving the treatment of the crushed batteries with an alkali hydroxide to produce insoluble manganese oxides and an alkali zincate solution. Zinc oxide is obtained by reacting the zinc solution with carbon dioxide or an acid such as a mineral acid and furnacing. The manganese oxides are converted to MnO by furnacing under an inert atmosphere.

IPC Classes  ?

• H01M 6/52 - Reclaiming serviceable parts of waste cells or batteries
• H01M 10/54 - Reclaiming serviceable parts of waste accumulators

Abstract

The present invention related to a method for the recycling of batteries by recovering and regenerating the cathode material. The method includes the steps of isolating the cathode particles and then regenerating the cathode particles for use in the same type of battery.

IPC Classes  ?

• H01M 6/52 - Reclaiming serviceable parts of waste cells or batteries
• H01M 10/54 - Reclaiming serviceable parts of waste accumulators

Abstract

There is provided an improvement for capacitors having activated carbon electrodes by the use of an electrolyte solution containing a carbonate of the formula RO(C=O)OR1 and a conductive salt such as a lithium salt or a quaternary ammonium salt at a concentration of from 0.6 to 3 mol/1.

IPC Classes  ?

• H01M 10/052 - Li-accumulators
• H01M 10/056 - Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
• H01M 10/05 - Accumulators with non-aqueous electrolyte
• H01G 11/60 - Liquid electrolytes characterised by the solvent
• H01G 11/58 - Liquid electrolytes
• H01G 11/30 - Electrodes characterised by their material
• H01G 9/035 - Liquid electrolytes, e.g. impregnating materials

Abstract

The present invention provide novel compounds and electrolyte solutions which can be used in capacitors and lithium batteries and which have a liquidus range of from about -65 to about 171 degrees C.

IPC Classes  ?

• H01M 10/0566 - Liquid materials
• H01G 9/035 - Liquid electrolytes, e.g. impregnating materials
• H01G 11/60 - Liquid electrolytes characterised by the solvent
• C07C 68/06 - Preparation of esters of carbonic or haloformic acids from organic carbonates
• C07C 68/08 - PurificationSeparationStabilisation
• C07C 69/96 - Esters of carbonic or haloformic acids

Abstract

The invention relates to the low temperature recovery of lead oxide (PbO) from lead acid battery paste through the preparation of at least one lead salt such as a lead carboxylate from the battery paste and the conversion of the at least one lead salt to PbO. The methods described herein may comprise treating the spent lead acid battery paste with a first base to remove sulfates and to form a mixture of lead oxides; treating the lead oxide mixture with an acid and a reducing agent to form at least one lead salt; and treating the lead salt with a second base under a CO2-free atmosphere at an elevated temperature to form PbO.

IPC Classes  ?

• H01M 10/54 - Reclaiming serviceable parts of waste accumulators
• H01M 10/06 - Lead-acid accumulators

Abstract

The present invention relates to the recovery of high purity litharge from spent lead acid battery paste at a low temperature which does not produce sulfur dioxide. In the process lead acetate or other lead salt is produced which is converted to high purity litharge by precipitation with a base.

IPC Classes  ?

• C01G 21/06 - Lead monoxide [PbO]
• B09B 3/00 - Destroying solid waste or transforming solid waste into something useful or harmless

Abstract

There is provided a process for recovering AB5 alloy from spent nickel hydride storage batteries and/or their cells without thermal melting or dissolving the AB5 alloy. The process comprises a step of partially dissolving the Ni(OH)2 and separating AB5 alloy still containing lanthanum metal.

IPC Classes  ?

• H01M 10/54 - Reclaiming serviceable parts of waste accumulators
• B09B 3/00 - Destroying solid waste or transforming solid waste into something useful or harmless

Abstract

An electrochemical device having an operational voltage up to 4.5 V in combination with a high concentration of an electrolyte salt consisting of a tetrafluoroborate salt and a eutectic of two solvents in which ethylene carbonate is one and an improved carbon electrode a preferred electrochemical device is a capacitor.

IPC Classes  ?

• H01G 9/00 - Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devicesProcesses of their manufacture

Abstract

Carbon electrodes for a capacitor having conditioned carbon elements in combination with a high concentration of an electrolyte tetrafluoroborate salt and a non-aqueous aprotic solvent to provide an operational voltage up to 4.5 V and capacitors used with the carbon electrodes.

IPC Classes  ?

• H01G 9/00 - Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devicesProcesses of their manufacture