CATHODE ACTIVE MATERIAL, PREPARATION METHOD THEREFOR, AND LITHIUM SECONDARY BATTERY COMPRISING SAME

The present exemplary embodiments relate to a positive electrode active material, a manufacturing method thereof, and a lithium secondary battery including the same. [0002] According to an exemplary embodiment, it is possible to provide a positive electrode active material containing: a lithium metal oxide, and a coating layer positioned on the surface of the lithium metal oxide, and the coating layer comprises a first compound having a peak observed in the range of 1580 cm to 1600 cm when measured by FT-IR and an average transmittance of the peak in the 0.990 to 0.998 range.