Patent ID: 6677085
Filing Date: 2004-01-13
Classification: H01M,Y02E,Y10T

Abstract:
An electrolyte system for lithium batteries comprising at least one lithium-containing conductive salt and at least one electrolyte liquid, wherein said electrolyte liquid comprises an effective amount of at least one partially fluorinated compound derived from a diol corresponding to formula (I):R1COâ€”Oâ€”[CHR3(CH2)mâ€”O]nâ€”R2â€ƒâ€ƒ(I) whereinR1 is a (C1-C8) alkyl group or a (C3-C8) cycloalkyl group, wherein each of said groups is partially fluorinated or perfluorinated so that at least one hydrogen atom of the group is replaced by fluorine; R2 is a (C1-C8) alkyl carbonyl or (C3-C8) cycloalkyl carbonyl group, wherein said alkylcarbonyl or cycloalkylcarbonyl group may optionally be partially fluorinated or perfluorinated; R3 is a hydrogen atom or a (C1-C8) alkyl or (C3-C8) cycloalkyl group; m is 0, 1, 2 or 3, and n is 1, 2 or 3.