Method for Preparing Positive Electrode Active Material for Secondary Battery, Positive Electrode Active Material Thus Prepared and Lithium Secondary Battery Including the Same

A method for preparing a positive electrode active material for a secondary battery, includes providing a lithium transition metal oxide; forming a mixture by mixing the lithium transition metal oxide, a coating polymer and carbide; and heat-treating the mixture to form a coating layer including a carbonized coating polymer and carbide on the surface of the lithium transition metal oxide particle.