| 摘要 |
PROBLEM TO BE SOLVED: To provide a lithium secondary battery having superior input/output characteristics to enable an input density and an output density which are high and do not depend on SOC(state of charge). SOLUTION: The lithium secondary battery comprises a positive electrode whose positive electrode activator consists of a lithium transition metal complex oxide, a negative electrode, and a nonaqueous electrolytic solution made by dissolving lithium salt in an organic solvent. The above lithium secondary battery is made to have each input density and output density of more than 1500 W/kg in a SOC of 50%, and to show the rate of change of the input density and of the output density of lower than 20% when the SOC is within the range of 25% to 80%. Further, in the lithium secondary battery, the positive activator is made of the lithium transition metal complex oxide having an olivine structure, which is represented by a compositional formula of LiMePO4 , and the nonaqueous electrolytic solution is impregnated into the positive electrode and negative electrode in the ratio of more than 60 wt.% when the positive electrode activator is 100 wt.%. |
