CATHODE ACTIVE MATERIAL AND LITHIUM SECONDARY BATTERY USING SAME

Disclosed is a cathode active material for secondary batteries comprising at least one compound selected from the following formula 1: (1-s-t)[Li(Li a Mn (1-a-x-y) Ni x Co y )O 2 ]*s[Li 2 CO 3 ]*t[LiOH] (1) wherein 0