POSITIVE ELECTRODE ACTIVE MATERIAL FOR USE IN NON-AQUEOUS LITHIUM SECONDARY BATTERY AND METHOD OF FABRICATING IT

摘要

PROBLEM TO BE SOLVED: To provide a positive electrode active material for a non-aqueous lithium secondary battery that has high output discharge characteristics and stable cycle characteristics with long life. SOLUTION: A lithium secondary battery comprises a negative electrode of a carbonic material joined with a positive electrode coated with a complex oxide consisting of Li and transition metal as the positive active material through a separator and non-aqueous electrolyte filled inside. The positive active material is a lithium and manganese complex compound of spinel structure that consists of primary particles, and secondary particles obtained by condensing the primary particles. The primary particles have average particle size of 1-50 μm, including particles with octahedral crystal face (111) by at least 3%.