| abstract |
Provided is a positive electrode active material for a lithium ion secondary battery excellent in high safety, high discharge voltage, high capacity, and cycle durability, and a method of manufacturing the same.n n n General formula (1): Li a Co b Al c Mg d A e O f F g (wherein A is Ti, Nb, or Ta, 0.90≤a≤1.10, 0.97≤b≤1.00, 0.0001≤c≤0.02 Containing a lithium cobalt-based composite oxide represented by 0.0001≤d≤0.02, 0.0001≤e≤0.01, 1.98≤f≤2.02, 0≤g≤0.02, and 0.0003≤c + d + e≤0.03). The positive electrode active material for lithium secondary batteries characterized by the above-mentioned.n n n Positive electrode active material for lithium secondary battery, safety, charge and discharge cycle characteristics, high discharge voltage, high chargeability |