| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte exhibiting excellent rate characteristics after high temperature storage, and to provide a lithium ion secondary battery using the nonaqueous electrolyte.SOLUTION: The nonaqueous electrolyte containing a nonaqueous solvent and an electrolyte dissolved into the nonaqueous solvent, further contains at least one kind of lithium salt selected from a group consisting of a difluorophosphoric acid lithium salt, a bis(fluorosulfonyl) amide lithium salt and a fluorosulfonic acid lithium salt, and a cyclic disulfonic acid ester. |
