Positive electrode active material for lithium secondary battery and lithium secondary battery comprising same

The invention provides a positive electrode active material for a lithium secondary battery and a lithium secondary battery including the same. The positive electrode for a lithium secondary battery includes lithium metal oxide particles including a Ti or V doped core containing a lithium iron phosphate-based compound, and a carbon coating layer formed on the core. The ratio of the intensity of a peak corresponding to PO4 to the intensity of a D band of the positive electrode active material measured by Raman spectroscopy has a predetermined range. Consequently, a positive electrode having improved structural stability, high-temperature stability, and cycle characteristics, high capacity, and high output characteristics can be provided. 本发明提供一种锂二次电池用正极活性物质及含其的锂二次电池。锂二次电池用正极包括锂金属氧化物颗粒，锂金属氧化物颗粒包括含磷酸铁锂系化合物且掺杂Ti或V的核及形成于所述核上的碳涂层。正极活性物质的通过拉曼光谱分析法测量的对应于PO4的峰的强度与D带的强度之比具有预定范围。因此可提供结构稳定性、高温稳定性及循环特性提高，具有高容量及高输出特性的正极。