| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery with high charging/discharging cycle characteristics and high charge a shelf life characteristics by using the specified sulfite as a solvent of a nonaqueous electrolyte. SOLUTION: A sulfite represented by formula: R<1> OSOOR<2> (R<1> and R<2> are the same or different alkyl groups having 1-4 carbon atoms) is used as a solvent of a nonaqueous electrolyte. The solvent of the nonaqueous electrolyte is the mixed solvent of the sulfite and at least one kind of cyclic carbonates selected from the group comprising ethylene carbonate, propylene carbonate, butylene carbonate, and vinylene carbonate in a volume ratio of 20:80-80:20. |
