Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Include electrolyte chemically specified and method
Patent
1995-03-23
1997-09-16
Valentine, Donald R.
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Include electrolyte chemically specified and method
429194, 429218, 429229, H01M 616, H01M 614, H01M 458, H01M 442
Patent
active
056679130
ABSTRACT:
An electroconductive polymer composite for use in secondary batteries as positive electrode active materials is disclosed. It includes 10-99 weight percent of a conjugated electroconductive polymer, such as polyaniline, and 90-1 weight percent of polymeric electrolyte. The latter is composed of 10-90 weight percent of an ionic salt, such as LiClO.sub.4, and 90-10 weight percent of a polymer which can form an electrolyte material with the ionic salt. The polymer, for example, can be polyvinyl alcohol or polyalkylene oxide. A method of using the electroconductive polymer composite to prepare the positive electrode of secondary batteries is also disclosed. It includes the steps of dissolving the above three components in an appropriate solvent (such as 1-methyl-2-pyrrolidinone), casting the resulting solution on an appropriate metallic grid or plate (such as nickel, aluminum or platinum) and removing the solvent therein to form a film which adheres to the metal grid or plate, in which the film is a positive electrode active material and the metallic grid or plate is a current collector. This invention also discloses a non-aqueous secondary battery which uses such positive electrode.
REFERENCES:
patent: 5066556 (1991-11-01), Toyosawa et al.
patent: 5108855 (1992-04-01), Diafuka et al.
patent: 5424151 (1995-06-01), Koksbang et al.
Chen Show-An
Lin Liang-Chang
Liauh W. Wayne
National Science Council
Valentine Donald R.
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