a lithium metal oxide particle having a form of secondary particle in which a plurality of primary particles are aggregated,

wherein the primary particles include a particle having a rod-type shape, and

wherein the lithium metal oxide particle is represented by Chemical Formula 1;

wherein in Chemical Formula, M1, M2 and M3 represents a first metal, a second metal and a third metal, respectively, and the first metal is Ni, the second metal is Mn and the third metal is Co,

0<x≤1.1, 2≤y≤2.02, 0.8≤a≤0.9, 0.01≤b≤0.2, 0.04≤c≤0.2, 0.091≤c/(a+c)≤0.111, and a+b+c=1,

wherein the first metal includes a decreasing concentration gradient region only at a specific portion between a central portion of the lithium metal oxide particle and a surface of the lithium metal oxide particle, and the third metal has a constant concentration from the central portion of the lithium metal oxide particle to the surface of the lithium metal oxide particle,

wherein a molar ratio of the first metal at the surface is 0.770 or more based on a total amount of the first metal, the second metal and the third metal,

wherein the first metal and the second metal do not have a continuous concentration gradient in a region of 0.4 μm radius from a center of the lithium metal oxide particle.