| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery in which the high temperature charge and discharge cycle in high temperature use, and capacity reduction, discharge performance reduction and capacity recovering ratio in high storage can be significantly improved, and the discharge performance under heavy load discharge condition or low temperature discharge condition can be also enhanced. SOLUTION: In this nonaqueous electrolyte secondary battery, Lix MO2 (M = selected from Ni, Co, Fe, Mn, V, and Mo) is used as active material in a positive electrode 2, and a carbon material capable of doping or dedoping lithium is used in a negative electrode 1. A solvent for electrolytic solution is formed of a mixed solution of 50-60% by volume of a mixture of a cyclic carbonate and a cyclic ester, 20-40% by volume of a chain carbonate, and 10-25% by volume of a chain ester. The electrolyte for electrolytic solution is selected from LiBF4 , FiPF6 , and LiAsF6 . |
