| 摘要 |
PROBLEM TO BE SOLVED: To provide a homogeneous and substituted lithium cobalt complex oxide which is not only superior in a cycle property, but also gives a secondary battery of a high capacity, and moreover superior in thermal stability, and provide its manufacturing method. SOLUTION: The substituted lithium cobalt complex oxide expressed in an equation Lix My Co1-y Oz is provided (in the equation, M is at least one kind of metallic element selected among Al, Ti, Mn, Mo and Sn, and x is a number ranging from 0.8 to 1.2, and y is a number ranging from 0.001 to 0.10). The oxide is used as a positive electrode active substance of a lithium secondary battery. By mixing powders of lithium compound, cobalt compound, and a compound of the element M so that the molar ratio agrees with the equation (I) in lower aliphatic alcohol of a carbon number 1-3, drying it, and calcining it at a temperature ranging from 600 to 1,100 deg.C under the oxidizing atmosphere, the substituted lithium cobalt complex oxide can be obtained. |
