Enhanced cyclic stability of NCM-622 cathode by Ti3+ doped TiO2 coating

The TiO2 coating on LiNi0.6Co0.2 Mn0.2O2 electrode can effectively improve its electrochemical properties, such as cyclic stability, ratio capacity and coulomb efficiency, etc. In this paper, Ti3+ was introduced into TiO2 coating by means of hydrogen thermal reduction. Compared with the original material and TiO2 coating material, Ti3+ doped TiO2 coating material has better electrochemical performance. After 150 cycles at 1 C, the capacity retention rates of the three materials were 79.9%, 92.8% and 95.1%, respectively. Our findings provide an effective approach for further enhancing the electrochemical performance of NCM cathode materials.