Patent ID: 8574757

Claim:
A nonaqueous electrolytic solution comprising: an electrolyte, a nonaqueous solvent, and a compound represented by at least one formula selected from the group consisting of Formula (2) and Formula (3), wherein for Formula (2), R 11 and R 12 are each independently selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, an aryl group, an aralkyl group, an alkoxyalkyl group, and a group represented by R a —O— in which R a represents an alkyl group, an alkenyl group, an aryl group, an aralkyl group, or an alkoxyalkyl group, wherein each of R 11 and R 12 has at most 12 carbon atoms; and R 15 represents an alkyl group having 1 to 12 carbon atoms, optionally substituted by a halogen atom, an alkenyl group having 2 to 12 carbon atoms, optionally substituted by a halogen atom, an aryl group having 6 to 12 carbon atoms, optionally substituted by a halogen atom, or an aralkyl group having 7 to 12 carbon atoms, optionally substituted by a fluorine atom; and wherein for Formula (3), R 21 to R 24 are each independently selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, an aryl group, an aralkyl group, an alkoxyalkyl group, and a group represented by R b —O— in which R b represents an alkyl group, an alkenyl group, an aryl group, an aralkyl group, or an alkoxyalkyl group, wherein each of R 21 to R 24 has at most 12 carbon atoms; R 25 represents an alkyl group having 1 to 12 carbon atoms, optionally substituted by a halogen atom, an alkenyl group having 2 to 12 carbon atoms, optionally substituted by a halogen atom, an aryl group having 6 to 12 carbon atoms, optionally substituted by a halogen atom, or an aralkyl group having 7 to 12 carbon atoms, optionally substituted by a halogen atom; and r is an integer of 0 to 6, provided that when both R 21 and R 22 are alkoxy groups, r is an integer of 1 to 6, and at least one of R 23 and R 24 represent a group other than a hydrogen atom.