Improvement of physical and chemical properties of LiNi_0.8Co_0.1Mn_0.1O₂ anode material by composite modification of Na and Zr

Due to the poor electrochemical performance of LiNi_0.8Co_0.1Mn_0.1O₂ anode materials under high voltage, modified materials were obtained after ball-milling of the precursor Ni_0.8Co_0.1Mn_0.1(OH)₂ obtained through a simple coprecipitation method with appropriate Na sources, Zr sources and Li sources. The changes in the electrochemical properties of the modified materials were explored by comparing the single doping or co-modification of Na and Zr、The XRD results show that after doping with Na and Zr, the Li spacing and the transition metal layer spacing of all modified materials are expanded and the cycle and multiplier performance of the modified materials are significantly improved through the electrochemical performance tests. In addition, the cycle and multiplier performance of LiNi_0.8Co_0.1Mn_0.1O₂ (NCM-Na-Zr) comodified by Na and Zr are significantly improved. After 200 cycles at 2.75~4.35 V and 1C rate, there are still the discharge specific capacity of 177.4 mAh/g and the capacity retention rate of 87.7%.