| abstract |
A positive electrode active material for a lithium secondary battery containing a compound represented by the following chemical formula 1 is introduced. [Chemical formula 1] Li1 + mNi1-w-x-y-zCowMnxM1yM2zO2-pXp (In the chemical formula 1, M1 and M2 are different from each other, and Al, Mg, Zr, Sn, Ca, Ge, Ti, Cr, Fe, Zn, respectively. It is any one element selected from the group consisting of Y, Ba, La, Ce, Sm, Gd, Yb, Sr, Cu and Ga, and X is selected from the group consisting of F, N, S, and P. Any one of the elements, w, x, y, z, p and m, is 0.125 <w <0.202, 0.153 <x <0.225, 0 ≦ y ≦ 0, respectively. 1, 0 ≦ z ≦ 0.1, 0.34 ≦ w + x ≦ 0.36, 0 ≦ p ≦ 0.1, −0.1 ≦ m ≦ 0.2) |