| 摘要 |
A lithium secondary battery using lithium manganese oxide as an positive active material and excellent for charge and discharge cycle property. As an positive active material of lithium secondary battery, lithium manganese. oxide having a cubic spinel structure, in which the strength ratio (P2/P1 strength ratio) of the primary endothermal peak (P1) appearing around 950.degree.C and the secondary endothermal peak (P2) appearing around 1100.degree.C in differential thermal analysis is under 1, is used. |
