| 摘要 |
PROBLEM TO BE SOLVED: To manufacture a positive active material with high energy density in a simple process and reduce manufacturing cost by bonding the specified transition metal with lithium in the specified ratio to prepare a salt and decomposing the salt by heat treatment. SOLUTION: As a positive active material, a group 7A or 8A transition metal oxide having high oxidizing force is used. A group 7A or 8A transition metal Me in the periodic table and Li are bonded in a solution reaction so as to substantially become Li/Me>=1 in molar ratio to form a salt, and the salt is heat-treated so that at least part of it forms amorphous transition metal oxide. The amorphous 7A or 8A transition metal oxide is molded in the prescribed electrode shape, and used as the positive active material. The positive active material of the amorphous transition metal oxide is obtained in a simple process, and manufacturing cost of a lithium battery with high energy density is reduced. |
