LITHIUM CUPRATE POSITIVE ELECTRODE MATERIAL, METHOD FOR PRODUCING THE SAME, AND LITHIUM SECONDARY BATTERY INCLUDING THE POSITIVE ELECTRODE MATERIAL AS POSITIVE ELECTRODE ACTIVE MATERIAL

摘要

PROBLEM TO BE SOLVED: To improve discharge capacity and electrode potential of lithium cuprate that is a lithium secondary battery positive electrode material high in safety and excellent in cycle characteristics, thereby providing an inexpensive material for improving safety, energy density or cycle characteristics of a lithium secondary battery.SOLUTION: The present invention provides a positive electrode material for a lithium secondary battery, which is lithium cuprate having a crystal structure that belongs to a space group Immm and represented by a chemical formula: LiCuMO(where M represents metal, and 0.01≤x≤0.45 is satisfied).