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