CATHODE ACTIVE MATERIAL, METHOD OF PREPARING THE SAME, AND LITHIUM SECONDARY BATTERY INCLUDING CATHODE INCLUDING THE SAME

Provided is a cathode active material including a core including a compound represented by Formula 1; and a coating layer including a phosphorus-containing compound disposed on a surface of the core: LiNaM1M2O Formula 1 In Formula 1, x, M1, M2, and α are the same as defined in relation to the present specification.