abstract |
A positive active material for a rechargeable lithium battery includes a compound represented by Chemical Formula 1, LiaNixCoyMezM1kM2pO2 wherein, 0.9≤a≤1.1, 0.7≤x≤0.93, 0<y≤0.3, 0<z≤0.3, 0.001≤k≤0.006, 0.001≤p≤0.005, x+y+z+k+p=1, Me is Mn or Al, M1 is a divalent element, and M2 is a tetravalent element. |