Patent ID: 8580429

Claim:
A nonaqueous electrolytic solution comprising an electrolyte salt dissolved in a nonaqueous solvent, which contains at least one hydroxy acid derivative compound represented by the following general formulae (I) and (II) in an amount of from 0.01 to 10% by mass of the nonaqueous electrolytic solution: (in the general formulae (I) and (II), R 1 represents a linear or branched alkyl group having from 1 to 6 carbon atoms, a linear or branched alkenyl group having from 2 to 6 carbon atoms, or a linear or branched alkynyl group having from 3 to 6 carbon atoms; R 2 represents a sulfonyl group (—SO 2 R 5 ) (where R 5 represents a linear or branched alkyl group having from 1 to 6 carbon atoms, or a linear or branched alkyl group having from 1 to 6 carbon atoms in which at least one hydrogen atom is substituted with a halogen atom), or a formyl group (—CHO); R 3 and R 4 each represent a hydrogen atom or a methyl group).