| abstract |
The present invention relates to a cathode active material for a lithium secondary battery comprising a lithium cobalt doped oxide doped with a metal having different cobalt sites, Wherein the lithium cobalt doped oxide comprises three kinds of dopants; Wherein the dopants are a metal (M1) having an oxidation number of +2, a metal (M2) having a +3 oxidation number, and a metal (M3) having a +4 oxidation number; Wherein the contents of M1, M2, and M3 satisfy the following condition (1) based on the molar ratio, and a method for producing the same. 0.5? R (molar ratio) = CM1 / (CM2 + CM3) <4 (1) Here, CM1 is the content of M1, CM2 is the content of M2, and CM3 is the content of M3. |