ACTIVE MATERIAL, ELECTRODE, AND LITHIUM-ION SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide an active material which is capable of obtaining sufficient discharge capacity and is excellent in rate characteristics, and to provide an electrode and a lithium-ion secondary battery.SOLUTION: The active material being a compound which is represented by chemical formula LiVOPOand whose crystal system is a tetragonal system, and having an average primary particle diameter of 0.05 to 3 μm inclusive is used as an electrode active material for a lithium-ion secondary battery.