| 摘要 |
PROBLEM TO BE SOLVED: To provide a producing method of a spinel-type lithium manganese multiple oxide by a spray pyrolysis method with addition of heat treatment so that excellent characteristics in cycles of charging and discharging can be obtd. for a long period of time when the obtd. product is used as a positive electrode active material of a lithium secondary cell. SOLUTION: After a spinel-type lithium manganese multiple oxide expressed by the formula of Li(Mn2-x Lix )O4 (wherein 0<x<=0.08) is synthesized by spray pyrolysis, the product is heat treated at TC (T satisfies T<865-2027×x, and x is same as x in the formula of Li(Mn2-x Lix )O4 ). The x in the above formula of Li(Mn2-x Lix )O4 satisfies 0<x<=0.05, and more preferably 0<x<0.02. |
