Patent ID: 8580434

Claim:
A cathode active material comprising: a lithium metal phosphate represented by Formula 1; and an additive comprising a metal oxynitride and a metal oxide, wherein the metal of the metal oxynitride is selected from the group consisting of Ti, Mo and Ta and the metal of the metal oxide is selected from the group consisting of Ti, Mo and Ta: LiMPO4 <Formula 1> where M is selected from the group consisting of Fe, V, Cr, Co and Ni, wherein the cathode active material comprises a core and a coating layer formed on a surface of the core, wherein the core comprises the lithium metal phosphate, and the coating layer comprises the metal oxynitride and the metal oxide, wherein a mole ratio of the metal of the coating layer to the metal of the lithium metal phosphate is from 1:100 to 5:100.