abstract |
A positive active material for a rechargeable lithium battery includes a compound represented by Chemical Formula 1, Li a Ni x Co y Me z M 1 k M 2 p O 2 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, M 1 is a divalent element, and M 2 is a tetravalent element. |