Ni-rich ternary cathode material LiNi0.8Co0.1Mn0.1O2 for lithium-ion battery was synthesized by a high-temperature solid-state reaction method

and its process conditions were optimized. The structural and morphological features of LiNi0.8Co0.1Mn0.1O2 cathode material prepared were investigated with X-ray diffraction and scanning electron microscopy. Its electrochemical properties were analyzed. The results showed that under the oxygen atmosphere

the molar ratio of lithium to metal elements was 1.05:1

the sintering time was 15 h and the sintering temperature was 750℃

the optimal synthesis conditions were obtained. The initial discharge capacity of the sample was 174.9 mA·h·g-1 at 1C

the specific capacity was 158.5 mA·h·g-1 after 50 cycles

and the capacity retention rate was 90.62%

which showed good cycle stability. The results of XRD and SEM showed that the sample sintered in oxygen atmosphere had a good layered structure with a small degree of cationic mixing and a good spherical shape. The particles were uniformly distributed in the range of 10-20 μm. The results of cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) showed that the electrochemical performance of the cathode materials was improved by optimization conditions.