Abstract:In order to further provide empirical guidance and data support for the actual production of high-nickel materials, the method of combining primary sintering and secondary coating was used to prepare high-nickel materials, and the washing process was introduced in the preparation process to reduce the residual alkali on the material surface and improve the electrochemical performance of the material. The results show that: In primary sintering, gradient sintering can improve the material capacity, and there is more residual alkali on the surface of the material after primary sintering. Water washing can effectively remove the residual alkali content on the surface of the material, and the optimization of the washing process is helpful to improve the electrochemical performance of the material, and control the washing time and stirring rate. Secondary sintering can increase the discharge gram capacity of materials, and also improve the cyclic properties of materials.