| abstract |
Disclosed is an additive for nonaqueous electrolyte solutions, which contains a compound represented by formula (1). In formula (1), X represents a sulfonyl group or a carbonyl group; R 1 represents a hydroxyl group, an alkyl group having 1-4 carbon atoms, which may be substituted by a halogen atom, or the like; and R 2 represents a hydrocarbon group having 1-3 carbon atoms, which may be substituted by a halogen atom. |