| abstract |
PROBLEM TO BE SOLVED: To provide a battery which has a high flash point, is excellent in safety, suppresses the decomposition reaction of a solvent, and has excellent life characteristics with little reduction in capacity and deterioration of load characteristics during high-temperature storage. And a secondary battery including the non-aqueous electrolyte. SOLUTION: A non-aqueous electrolyte containing a non-aqueous solvent containing a cyclic carboxylic acid ester, a sulfonic acid derivative and a lithium salt. Cyclic carboxylic acid ester, by using a lithium salt, and an electrolyte which contains a sulfonic acid derivative such as LiPF 6, non-load characteristics during life test such as the high temperature storage test, the deterioration of the resistance is significantly reduced A water electrolyte secondary battery can be obtained. In addition, a nonaqueous electrolyte secondary battery having a high flash point and excellent safety can be obtained by the nonaqueous electrolyte of the present invention. |