BENZENE SULFONIC ESTER, ELECTROLYTE SOLUTION FOR LITHIUM SECONDARY BATTERY USING IT, AND LITHIUM SECONDARY BATTERY USING IT

摘要

PROBLEM TO BE SOLVED: To provide electrolyte solution for a lithium secondary battery excellent in initial battery capacity and cycle characteristics and a lithium secondary battery using the same.

SOLUTION: The nonaqueous electrolyte solution is expressed in general formula (II), in which, X1to X5denote, each independently, a fluorine atom or a hydrogen atom, at least one substituted with a fluorine atom, and R2contains 0.01 wt.% or more and 10 wt.% or less of benzene sulfonic ester showing a direct-chain or branched alkenyl group, phenyl group or biphenyl group with the carbon number of 3 to 6. The lithium secondary battery contains the nonaqueous electrolyte solution.

COPYRIGHT: (C)2009,JPO&INPIT