Positive Electrode Active Material For Lithium Secondary Battery, Method Of Preparing The Same, And Lithium Secondary Battery Including The Positive Electrode Active Material

The present invention relates to a positive electrode active material for a lithium secondary battery which includes a lithium composite transition metal oxide including nickel (Ni), cobalt (Co), and manganese (Mn), wherein a portion of nickel (Ni) sites of the lithium composite transition metal oxide is substituted with tungsten (W), and an amount of a lithium tungsten oxide remaining on surfaces of lithium composite transition metal oxide particles is 1,000 ppm or less.