Patent ID: 8765310

Claim:
A nonaqueous electrolytic solution comprising: a polymer which undergoes electrolytic polymerization in the range of 4.3V or more to 5.5V or less at the lithium metal standard voltage, having a repeating unit represented by formula (1); an electrolytic salt; and a nonaqueous solvent, where A is a functional group which undergoes electrolytic polymerization in the range of 4.3V or more to 5.5V or less at the lithium metal standard voltage, comprising: an electrolytic polymerization functional group having an aromatic functional group; and a bonding group comprising a bond binding the aromatic functional group of the electrolytic polymerization functional group to the repeating unit, the bond binding the aromatic function group to the repeating unit selected from the group consisting of an ether bond and an ester bond, and where R and R′ are each independently selected from the group consisting of a hydrogen atom and a methyl group.