Nickel, cobalt, manganese and nickel are active substances. Because the higher the content of nickel, nickel is one of the important active substances of materials, which is used to improve the volume energy density of new materials. Ternary materials with high nickel content (that is, high nickel content) will also lead to high nickel content of nickel, cobalt and manganese, but when the nickel content is too high, the capacity will decrease. Nickel has the characteristics of good mechanical strength and ductility, high temperature resistance and no oxidation in air. At room temperature, in humid air, a dense oxide film is formed on the surface, which can prevent the bulk metal from further oxidation.