A cathode active material including: a lithium metal oxide core represented by Formula 1 below; and an oxide coating layer formed on the lithium metal oxide core:
Li[LixMeyMz]O2+d. <Formula 1>
In Formula 1: x+y+z=1 (0<x<0.33 and 0<z<0.1); 0≦d≦0.1; Me includes at least one metal selected from the group consisting of Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Al, Mg, Zr, and B; and M includes at least one metal selected from the group consisting of Mo, W, Ir, Ni, and Mg.