Electrolyte system for lithium batteries and use of said system,

Details Electrolyte system for lithium batteries and use of said system, Electrolyte system for lithium batteries and use of said system,

1998-06-12

2000-12-12

Nuzzolillo, Maria

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

429199, H01M 616

Patent

active

06159640&

ABSTRACT:
Electrolyte systems for lithium batteries of increased safety comprise at least one lithium-containing conducting salt and at least one electrolyte fluid and, according to the invention, are defined by at least one partially fluorinated carbamate of general formula (I) ##STR1## where R.sup.1 and R.sup.2 independently of one another or identical or different, linear C.sub.1 -C.sub.6 -alkyl, branched C.sub.3 -C.sub.6 -alkyl, C.sub.3 -C.sub.7 -cycloalkyl or R.sup.1 and R.sup.2 directly or via one or more additional nitrogen and/or oxygen atoms are linked to form a ring having from 3 to 7 ring members, and the additional nitrogen atoms present in the ring being substituted with C.sub.1 -C.sub.3 -alkyl and the ring carbon atoms optionally carrying C.sub.1 -C.sub.3 -alkyl, with the option of one or more hydrogen atoms in the radicals R.sup.1 and R.sup.2 being replaced by fluorine atoms, R.sup.3 is a partially fluorinated or perfluorinated straight-chain alkyl group having from 1 to 6 carbon atoms, is a partially fluorinated or perfluorinated branched alkyl group having from 3 to 6 carbon atoms or a partially fluorinated cycloalkyl group having from 3 to 7 carbon atoms, which optionally be monosubstituted or polysubstituted with C.sub.1 -C.sub.6 -alkyl.

REFERENCES:
patent: 5385794 (1995-01-01), Yokoyama et al.
patent: 5866711 (1997-07-01), Hung et al.

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