Positive active material for rechargeable lithium battery and rechargeable lithium battery including same

Abstract

A positive active material for a rechargeable lithium battery and a rechargeable lithium battery including the same are provided. The positive active material for a rechargeable lithium battery may include a compound represented by Chemical Formula 1: Li1+x1Co1-x2-x3-x4M1x2M2x3M3x4O2.   Chemical Formula 1 In Chemical Formula 1, 0<x1≤0.03, 0.005≤x2≤0.02, 0.01≤x3≤0.025, 0≤x4≤0.005, and x2+x3>0.01; M1 may be selected from Mg, Na, Ca, and a combination thereof; M2 may be selected from Al, B, Fe, and a combination thereof; and M3 may be selected from Ti, Zr, V, Cr, Mo, W, Mn, Ni, Cu, Ag, Zn, Si, Sn, N, P, S, F, Cl, and a combination thereof.

Dependencies are inferred from the claim text.