Patent ID: 6855458
Filing Date: 2005-02-15
Classification: H01M,Y02E

Abstract:
1. A non-aqueous electrolyte composition for lithium secondary cells, comprising a lithium salt dissolved in an organic solvent system composed of a fluorobenzene component (FB) and a carbonic acid ester component (CE), wherein the solvent components are present in a ratio from 50 FB:50 CE to 12.5 FB:87.5 CE, based on volume percent, said fluorobenzene component being one or more compounds represented by the following general formula 1: wherein F represents a fluorine element and n is an integer of 1-6; and said carbonic acid ester component having compounds represented by the following general formulas 2 and 3: wherein R 1 and R 2 , which may be the same or different, each represents an alkyl radical containing 1-4 carbon atoms and wherein R 3 , R 4 , R 5 and R 6 , which may be the same or different, each represents a hydrogen atom or an alkyl radical containing 1-4 carbon atoms.