CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, AND METHOD FOR PREPARING CATHODE ACTIVE MATERIAL

The present invention relates to a positive electrode active material, a method for producing the positive electrode active material, a positive electrode including the positive electrode active material, and a lithium secondary battery, the positive electrode active material including a lithium transition metal oxide having a spinel crystal structure, and a coating layer positioned on the surface of the lithium transition metal oxide, wherein the coating layer has an orthorhombic structure, and includes an oxide represented by Formula 1.