| 摘要 |
PROBLEM TO BE SOLVED: To provide a positive electrode active substance for a lithium secondary battery consisting of a Spinel structural lithium manganese complex oxide wherein the cycle durability in high temperatures can be improved without decreasing the charge-discharge capacity, and also provide the lithium secondary battery in which the charge-discharge capacity and the cycle durability have been improved as a result of using such a positive electrode active substance. SOLUTION: A complex oxide in which a part of Mn in the Spinel structural lithium manganese complex oxide LiMn2O3 has been substituted by divalent metallic element and trivalent metallic element, that is, Li1+XMn2-X-Y-ZAYBZO4-δ (A is at least one kind of Mg, Ni, Cu, Zn, and B is one kind of Al, Cr, Fe, Co, Ga, In) is used as a positive electrode active substance of the lithium secondary battery. |
