| 摘要 |
PURPOSE: Provided are a cathode active material for lithium secondary battery, which has an excellent life property, and which is safe when overcharged, and a lithium secondary battery comprising the same. CONSTITUTION: The cathode active material comprises a cobalt-based or nickel-based lithium intercalation compound selected from the group consisting of the following(1)-(9); and a lithium-containing manganese-based compound surface-treated with hydroxyl group(OH). LixCo1-yM'yA2(1); LixCo1-yM'yO2-zXz(2); LixNi1-yM'yA2(3); LixNi1-yM'yO2-zXz(4); LixNi1-yCoyO2-zXz(5); LixNi1-y-zCoyM'zAα(6); LixNi1-y-zCoyM'zO2-αXα(7); LixNi1-y-zMnyM'zAα(8); LixNi1-y-zMnyM'zO2-αXα (9). In the formulas, 0.95<=x<=1.1, 0<=y<=0.5, 0<=z<=0.5, 0<=α<=2, M' is at least one element selected from the group consisting of Al, Ni, Co, Mn, Cr, Fe, Mg, Sr, V or rare earth elements, A is an element selected from the group consisting of O, F, S and P, and X is an element selected from the group consisting of F, S, and P. |
