| 摘要 |
Provided is a nonaqueous electrolyte for secondary batteries, which is capable of maintaining high discharge characteristics even at low temperatures. This nonaqueous electrolyte for secondary batteries contains a nonaqueous solvent and a lithium salt that is dissolved in the nonaqueous solvent. The nonaqueous solvent contains a cyclic carbonate, a chain carbonate, a fluoroarene and a carboxylic acid ester; and the cyclic carbonate contains ethylene carbonate. In the nonaqueous solvent, the content of the cyclic carbonate (MCI) is 4.7-90% by mass, the content of the ethylene carbonate (MEC) is 4.7-37% by mass, the content of the chain carbonate (MCH) is 8-80% by mass, the content of the fluoroarene (MFA) is 1-25% by mass, and the content of the carboxylic acid ester (MCAE) is 1-80% by mass. |
