| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-capacity nonaqueous electrolytic secondary battery which is excellent in shelf life when being charged to a high final charging voltage.SOLUTION: A nonaqueous electrolytic secondary battery comprises: a positive electrode including a positive electrode active material; a negative electrode; and a nonaqueous electrolyte. The positive electrode active material includes a lithium cobalt complex oxide including at least zirconium and magnesium, or a mixture of the lithium cobalt complex oxide and a lithium manganese nickel complex oxide having a layer structure. The nonaqueous electrolyte includes: fluoroethylene carbonate; di(2-propynyl)oxalate; and a dinitrile compound expressed by NC-R-CN (where R represents a straight-chain saturated hydrocarbon group). |
