| 摘要 |
A positive active material for a rechargeable lithium battery is provided. The positive active material is characterized by formulas 1 or 2. The positive active material exhibits good cycle life characteristics and high capacity.(where 0.95<=a<=1.05, 0.01<=x+y<=0.5, 0<y<=0.1, 0<=z<=0.05, 1.7<=b <=2.3, M is at least one metal selected from the group consisting of La and Ce, and N is at least one metal selected from the group consisting of Mg and Sr.)(where 0.95<=a+b<=1.05, 0<=b<=0.5, 0.01<=x+y<=0.5, <0<=0.1, 1.7<=z <=2.3, M is at least one metal selected from the group consisting of La and Ce, and N is Mg.) |
