NONAQUEOUS ELECTROLYTE SOLUTION AND NONAQUEOUS ELECTROLYTE BATTERY

摘要

Disclosed is a nonaqueous electrolyte solution which enables to obtain a battery with high capacity which generates only a small amount of gas, while being excellent in storage characteristics and cycle characteristics. This nonaqueous electrolyte solution contains an electrolyte and a nonaqueous solvent dissolving the electrolyte, and further contains a compound represented by the general formula (1) below in an amount of not less than 0.001% by volume but less than 1% by volume in the nonaqueous solvent. Alternatively, the nonaqueous electrolyte solution contains the compound represented by the general formula (1) below in an amount of not less than 0.001% by volume but less than 5% by volume in the nonaqueous solvent, and further contains at least one compound selected from the group consisting of cyclic carbonate compounds having a carbon-carbon unsaturated bond, cyclic carbonate compounds having a fluorine atom, monofluorophosphates and difluorophosphates. In the general formula (1), R¹-R³ independently represent an alkyl group having 1-12 carbon atoms which may be substituted by a halogen atom; and n represents an integer of 0-6.