Method for preparing and using electroconductive polymer composi

Details Method for preparing and using electroconductive polymer composi Method for preparing and using electroconductive polymer composi

1997-03-27

1998-12-15

Valentine, Donald R.

Metal working

Method of mechanical manufacture

Electrical device making

2041921, 252 622, 252511, 427 58, 427250, 4273882, 4273885, 427404, 427409, 429215, H01M 600, B05D 512, B05D 700

Patent

active

058490450

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: 5424151 (1995-06-01), Koksbang et al.
patent: 5597661 (1997-01-01), Takeuchi et al.

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