CATHODE ACTIVE MATERIAL PRECURSOR AND LITHIUM SECONDARY BATTERY UTILIZING SAME

A cathode active material precursor according to embodiments of the present invention includes nickel (Ni) and cobalt (Co) and includes an excess amount of Ni. A/Ais 1 or more and I/Iis 1 or more. Ais a peak area of (101) plane, and Ais a peak area of (001) plane by an X-ray diffraction (XRD) analysis, and Iis a peak intensity of (101) plane, and Iis a peak intensity of (001) plane by the XRD analysis. A cathode and a lithium secondary battery having improved crystallinity and long-term stability using the cathode active material precursor.