POSCO Holdings Inc.
CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, AND LITHIUM SECONDARY BATTERY COMPRISING SAME

Abstract:

The present disclosure relates to a positive electrode active material for lithium secondary battery comprising a first compound represented by Chemical Formula 1, and a second compound represented by Chemical Formula 2, wherein, a content of the first compound is 65 wt % or more based on 100 wt % of the positive electrode active material, and a lithium secondary battery comprising the same. Li.sub.a1Ni.sub.b1Co.sub.c1Mn.sub.d1N1.sub.e1M2.sub.f1O.sub.2-f1 [Chemical Formula 1] Li.sub.a2Ni.sub.b2Co.sub.c2Mn.sub.d2M3.sub.e2M4.sub.f2O.sub.2-f2 [Chemical Formula 2] wherein, each composition and molar ratio of Chemical Formulas 1 and 2 are as defined in the specification.