| 摘要 |
PROBLEM TO BE SOLVED: To improve a cycle property, while keeping flame resistance by adding one or more compounds with specified compositions and a phosphoric acid ester compound as solvents to a nonaqueous electrolytic solution. SOLUTION: This battery comprises a negative electrode containing a material which can be doped or dedoped with lithium as a main component, a positive electrode, and a nonaqueous electrolytic substance and at least one of compounds having a Formula 1 (where R<1> stands for alkyl group; X for halogen group, and n is an integer from 1 to 5) or a Formula 2 (where R<2> , R<3> may be similar or dissimilar alkyl group; X for halogen group; and n is 1-4) and a phosphoric acid ester compound are added as solvents of a nonaqueous electrolytic solution. It is preferable that R<1> of the formula 1 be an alkyl group of 1-6 carbons and R<2> , R<3> of the formula 2 be alkyl group of 1-4 carbons. Further, it is preferable that the compound with the formula 1 added be contained 0.01-1.0 mole/l and the compound with the formula 2 added be contained 0.005-0.5 mole/l in concentration. |
