CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY HAVING THE SAME

摘要

Cathode active material for a lithium secondary battery and a lithium secondary battery with the same are disclosed. The cathode active material comprises a lithium metal complex oxide described by the following Formula 1: [Formula 1] Li[LizA]O2 A={M1 1-x-y(M1 0.78Mn0.22)x}M2 y (wherein, M1 and M2 are at least one distinct transition metal element, a rare earth element, and the combination thereof, -0.05=z=0.1, 0.8=x+y=1.8, 0.05=y=0.35, and the oxidation state of Ni is an oxidation number between 2.01 to 2.4).