Patent ID: 8709650

Claim:
A cathode active material for a secondary battery, comprising a combination of: one or more compound selected from compounds represented by Formula 1; one or more compound selected from compounds represented by Formula 2; and one or more compound selected from compounds represented by Formula 3, (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) Li(Li b Mn (2-b) )O 4 (2) (1-u)LiFePO 4 *uC (3) wherein 0<a<0.3; 0<x<0.8; 0<y<0.6; 0<s<0.05; 0<t<0.05; 0<b<0.3; 0.01<u<0.1; a, b, x and y denote mole ratios; and s, t and u denote weight ratios and wherein the compound represented by Formula 1 is contained in an amount of 20 to 90 wt. %, the compound represented by Formula 2 is contained in an amount of 5 to 80 wt. %, and the compound represented by Formula 3 is contained in an amount of 10 to 75 wt. %, relative to a total weight of the cathode active material.