In this study, the Ni0.9Co0.05Ti0.05(OH)2 precursor was prepared by the concentration gradient co-precipitation method. In order to overcome the structural change due to oxygen desorption in the cathode active material with high nickel content, the physical and electrochemical analysis of the cathode active material according to the calcination temperature were investigated. Physical properties of Li1.05Ni0.9Co0.05Ti0.05O2 were analyzed by FE-SEM, XRD and TGA. The electrochemical performance of the coin cell using a cathode active material and LiPF6(EC:EMC=1:2 vol%) electrolyte was evaluated by the initial charge/discharge efficiency, cycle retention, and rate capabilities. As a result, the initial capacity and initial efficiency of cathode materials were excellent with 244.5~247.9 mAh/g and 84.2~85.8% at the calcination temperature range of 750~760 °C. Also, the capacity retention exhibited high stability of 97.8~99.1% after 50cycles.