| 摘要 |
PROBLEM TO BE SOLVED: To provide a positive electrode active material for lithium secondary battery and a method to manufacture the active material, assuring a high battery capacity, mean discharge voltage, charge-discharge cyclic durability, and the safety. SOLUTION: A positive electrode active material for a lithium secondary battery is formed from a lithium-containing compound oxide expressed by LiNixCoyMzO2, where M is either of Al, Mn, Ti, Mg, Cr, and the conditions should be met that 0.95<=x+y+z<=1.05, 0.5<=x<=0.9, 0.05<=y<=0.3, and 0<=z<=0.2, wherein the half-value width of the diffraction peak at 2θ=65±1 deg. in X-ray diffraction should range between 0.13 deg. and 0.20 deg.. |
