Fluorine-containing solvents for lithium batteries having increa

Details Fluorine-containing solvents for lithium batteries having increa Fluorine-containing solvents for lithium batteries having increa

1997-05-09

1999-06-29

Nuzzolillo, Maria

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

429335, H01M 1040

Patent

active

059167084

ABSTRACT:
The safety of secondary lithium cells is remarkedly enhanced when partially fluorinated ethers of the formulae
and/or
are being used, wherein R is a straight-chain alkyl group containing 1 to 10 carbon atoms or a branched alkyl group containing 3 to 10 carbon atoms, X is fluorine, chlorine or a perfluoroalkyl group containing 1 to 6 carbon atoms, which may also contain ethereal oxygen, m is an integer from 2 to 6 and n is an integer from 1 to 8. Preferred are compounds of the formula (I), wherein R is a methyl group, X is fluorine, m is 2 and n is an integer from 1 to 3 and also compounds of the formula (II), wherein m is 2 and n is an integer from 1 to 3.

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patent: 5529859 (1996-06-01), Shu et al.
patent: 5633099 (1997-05-01), Yokoyama et al.
patent: 5714280 (1998-02-01), Nakano et al.
Database WPI, Section Ch, Derwent Publications Ltd., London GB; Class E16, AN 89-181258 1989, no month available.
Lichtenberger et al., "Sur les Additions Nucleophiles au Trifluorchlorethene (1)", Bulletin De La Societe Chimique De France, 1 Nr. 96, pp. 581-592 (1957) (no month available).
Besenhard, J. O., et al, "Inorganic film-forming electrolyte additives improving the cycling behaviour of metallic lithium electrodes and the self-discharge of carbon-lithium electrodes", Journal of Power Sources 44: p. 413 (1993). (no month available).

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