Patent ID: 8383274

Claim:
A nonaqueous electrolytic solution for a lithium battery, comprising: a nonaqueous solvent; and an electrolyte dissolved in the nonaqueous solvent; wherein the nonaqueous solvent comprises from 0.01 to 10% by mass of at least one compound selected from the group consisting of a compound of formula (I), 1,2-ethanediol acetate methanesulfonate, 1,3-propanediol acetate methanesulfonate, 1,4-butanediol acetate methanesulfonate, and 2-butene-1,4-diol acetate methanesulfonate: wherein X is an alkylene group having from 1 to 6 carbon atoms, an alkenylene group having from 4 to 8 carbon atoms, or an alkynylene group having from 4 to 8 carbon atoms; R 1 is a hydrogen atom, or a group of formula (II); R 2 is an alkyl group having from 1 to 6 carbon atoms, a cycloalkyl group having from 3 to 8 carbon atoms, or a group of formula (II); with the proviso that at least one hydrogen atom of the alkyl group is optionally substituted with a halogen atom; wherein R 3 to R 7 are each independently a hydrogen atom, a fluorine atom, a methoxy group, or an ethoxy group.