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

Abstract:

The present disclosure relates to a positive active material for a lithium rechargeable battery and a lithium rechargeable battery including the same, which include a first compound represented by Chemical Formula 1 and a second compound represented by Chemical Formula 2, and a content of the first compound is 65 wt % or more based of the positive active material of 100 wt %. Li.sub.a1Ni.sub.b1Co.sub.c1Mn.sub.d1M1.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] Chemical Composition 1 and 2 of each composition and molar ratio is as defined in the specification. Each composition and molar ratio of Chemical Formula 1 and 2 is as defined in the specification.