Patent ID: 11365130

Abstract:
The present invention provides a positive electrode active material precursor for a lithium secondary battery, in which the positive electrode active material precursor is represented by the following composition formula (I), a ratio (α/β) between a half width α of a peak that is present within a range of a diffraction angle 2θ=19.2±1° and a half width β of a peak that is present within a range of 2θ=38.5±1° is equal to or greater than 0.9 in powder X-ray diffraction measurement using a CuKα beam: NixCoyMnzMw(OH)2  (I) [0.7≤x<1.0, 0<y≤0.20, 0≤z≤0.20, 0≤w≤0.1, and x+y+z+w=1 are satisfied, and M is one or more selected from the group consisting of Mg, Ca, Sr, Ba, Ti, Zr, V, Nb, Cr, Mo, W, Fe, Ru, Cu, Zn, B, Al, Ga, Si, Sn, P, and Bi].