Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Include electrolyte chemically specified and method
Patent
1988-07-25
1991-04-23
McCamish, Marion E.
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Include electrolyte chemically specified and method
522 83, 522 86, 522166, C08J 328, C08K 324, C08L 7102, H01M 618
Patent
active
050099701
ABSTRACT:
A solid polymer electrolyte is in the form of a gel comprising a complex of a solid polymer (e.g. poly(ethene oxide) and an alkali metal salt (e.g. LiClO.sub.4), the polymer being cross-linked to inhibit its transformation from an amorphous form to a crystalline form thereby to improve the alkali metal ion conductivity of the electrolyte at lower temperatures. The electrolyte may be made by irradiating (e.g. by gamma radiation or an electron beam) a solution, preferably aqueous, of the complex to cause the polymer to cross-link and form a gel. The electrolyte may be used as a component in a solid state electrochemical cell (e.g. for a rechargeable lithium battery), where the gel form of the electrolyte assists fabrication.
REFERENCES:
patent: 2964455 (1960-12-01), Graham
patent: 3429794 (1969-02-01), Patterson
patent: 3470078 (1969-09-01), King
patent: 4556614 (1985-12-01), le Mehaute et al.
Hooper Alan
Kronfli Esam
Lovell Keith V.
Neat Robin J.
Koeckert Arthur H.
McCamish Marion E.
United Kingdom Atomic Energy Authority
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