| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte that can achieve a nonaqueous electrolyte secondary battery having improved initial charge capacity, input/output characteristics and impedance characteristics.SOLUTION: The nonaqueous electrolyte contains a nonaqueous solvent, LiPF, and a fluorosulfonic acid salt expressed by formula (1):M(FSO)x, and further at least one substance selected from the group consisting of a cyclic carbonate having a fluorine atom, a cyclic carbonate having a carbon-carbon unsaturated bond, cyclic sulfonic acid ester, a compound having a cyano group, a diisocyanate compound, lithium fluorophosphate except LiPF, lithium imide salts and lithium oxalate salts. The nonaqueous electrolyte secondary battery containing the nonaqueous electrolyte is also disclosed. |
