| abstract |
A positive active material for a rechargeable lithium battery includes a lithium metal oxide represented by the following Chemical Formula 1: n (Li 1−(x+y) Na x Ky)(Co 1−(a+b) Zr a M′ b )O 2 [Chemical Formula 1]n n wherein, 0<x≦0.1, 0≦y≦0.1, 0<x+y≦0.1, 0<a≦0.1, 0≦b≦0.1 and 0<a+b≦0.1, and M′ is at least one element selected from Y, Nb, V, Cr, Mn, Fe, Ni, Cu, Zn, Mg, Ca, and Sr. |