| abstract |
The present disclosure relates to a positive electrode active material for a lithium secondary battery and a lithium secondary battery comprising the same. A positive electrode active material for a lithium secondary battery according to an embodiment may contain a compound represented by chemical formula 1 below. [Chemical formula 1] Lia(NixCoyMnzAlbMgcMd)O2, wherein 0.96<a<1.04, 0.8≤x<1, 0<y≤0.075, 0<z≤0.025, 0.001<b≤0.02, 0<c<0.02, 0≤d<0.005, b>c, x+y+z+b+c+d = 1, and M is at least one element selected from the group consisting of Cr, Fe, La, Ce, Sr, V, Ti, Mo, Zr, B, Rb, and Y. |