METHOD FOR PRODUCING POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY PRODUCED THEREBY

The present invention relates to a method for producing a positive electrode active material, a positive electrode active material produced by the method, thereby having a BET specific surface area of 10 m/g or less, a positive electrode including the positive electrode active material, and a lithium secondary battery, wherein the method includes preparing a lithium transition metal oxide in the form of a secondary particle in which primary particles are aggregated, mixing the lithium transition metal oxide and a carbon-based material of a hollow structure having a plurality of pores to form a mixture, and surface treating the mixture in a mechanical manner to form a carbon coating layer on the surface of the lithium transition metal oxide, wherein the carbon-based material of a hollow structure having a plurality of pores has a specific surface area of 200 m/g or greater and a graphitization degree(I/I) of 0.5 or greater.