MANUFACTURING METHOD FOR LITHIUM/MANGANESE COMPOSITE OXIDE, LITHIUM/MANGANESE COMPOSITE OXIDE OBTAINED BY THE MANUFACTURING METHOD, POSITIVE ACTIVE MATERIAL FOR SECONDARY BATTERY INCLUDING LITHIUM/MANGANESE COMPOSITE OXIDE, POSITIVE ELECTRODE FOR SECONDARY BATTERY INCLUDING POSITIVE ACTIVE MATERIAL, AND LITHIUM ION SECONDARY BATTERY USING POSITIVE ACTIVE MATERIAL AS POSITIVE ELECTRODE

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method for a lithium/manganese composite oxide excellent in cycle characteristics when used at high temperature, and having a high discharge capacity which is used as a positive active material.SOLUTION: A manufacturing method for a lithium/manganese composite oxide expressed as LiMnMMO, includes: a preliminary crushing process in which a lithium solid source is included in a solvent, the lithium solid source is crushed and mixed in this condition, and then a slurry (1) is obtained; a precursor adjusting process in which the lithium source having crushed and mixed in the slurry (1), a manganese source, a compound including M, and a compound including Mare mixed in a solvent, and they are crushed and mixed in this condition, and then a slurry (2) thus obtained is dried to obtain a precursor; and a firing process in which this obtained precursor is fired at 600-1,200°C to obtain a lithium manganese/composite oxide.