Positive Electrode Active Material for Lithium Secondary Battery, Method of Preparing the Same, and Positive Electrode for Lithium Secondary Battery and Lithium Secondary Battery Which Include the Positive Electrode Active Material

A positive electrode active material comprising:

• a lithium transition metal oxide represented by Formula 1;
• and a coating element M3-containing coating layer formed on a surface of the lithium transition metal oxide represented by Formula 1, wherein M3 comprises at least one of Al, Ti, Mg, Zr, W, Y, Sr, or Co;
• Li1+a[NixCoyM1zM2w]1-aO2 [Formula 1]
• wherein,
• 0≤a≤0.2, 0.6≤x<1, 0<y≤0.4, 0<z≤0.4, 0<w≤0.1, and x+y+z+w=1,
• M1 comprises at least one of manganese (Mn) or Al, and
• M2 comprises at least one of Al, Ti, Mg, Zr, W, Y, Sr, Co, F, Si, Na, Cu, Fe, Ca, S, or B,
• wherein the lithium transition metal oxide has a single particle form and comprises a center portion having a layered structure and a surface portion having a rock-salt structure, and
• a total amount of a doping element M2 and the coating element M3 is in a range of 4,580 ppm to 9,120 ppm based on a total weight of the positive electrode active material.