Positive Electrode Active Material, and Positive Electrode and Lithium Secondary Battery Which Include the Positive Electrode Active Material

In one arrangement, the present disclosure relates to a positive electrode active material including a nickel-cobalt-manganese-based lithium transition metal oxide which contains nickel in an amount of 60 mol % or more based on a total number of moles of metals excluding lithium, wherein the nickel-cobalt-manganese-based lithium transition metal oxide is doped with doping element M(where the doping element Mis a metallic element including Al) and doping element M(where the doping element Mis at least one metallic element selected from the group consisting of Mg, La, Ti, Zn, B, W, Ni, Co, Fe, Cr, V, Ru, Cu, Cd, Ag, Y, Sc, Ga, In, As, Sb, Pt, Au, and Si), where the doping element Mcan be in an amount of 100 ppm to 10,000 ppm, and the doping element Mand the doping element Mare included in a weight ratio of 50:50 to 99:1.