O método de produção do material precursor do material catódico de níquel-cobalto-lítio-óxido de manganês (V)
The production method of the precursor material (Ni0.8Co0.1Mn0.1)O0.55 for nickel cobalt lithium manganese oxide cathode material involves two main steps: the preparation of nickel cobalt manganese alloy powder and the oxidation of the alloy powder to obtain nickel cobalt manganese oxide.
In the first step, the nickel cobalt manganese alloy powder is prepared by mixing metal nickel, cobalto, e manganês em uma proporção molar de 8:1:1. The mixture is heated and melted under nitrogen protection to prevent oxidation. The molten metal liquid is then atomized by a high-pressure nitrogen gas flow at a pressure of 4 MPa and a flow rate of 4 kg/min. The atomized metal powder solidifies, resolve, and falls into a powder collection tank in the atomization tower to obtain nickel cobalt manganese alloy powder. The resulting powder particles are regular spherical, with a loose density of 4.7 g/cm3 e uma densidade compactada de 5.2 g/cm3. The melting of nickel, cobalto, and manganese metals at high temperatures results in a uniform mixing of the alloy powder at the atomic level, which is beneficial for the subsequent preparation of highly homogeneous nickel cobalt manganese oxides.
In the second step, the nickel cobalt manganese alloy powder obtained in the first step is placed in an oxidation furnace with stirring and ventilation. The stirring speed is 100 rpm, and compressed air is introduced at a pressure of 0.5 MPa to maintain the material in a dynamic state during roasting and oxidation. The oxidation temperature is 600℃, and the oxidation time is 6 h. The oxidized product is then transferred to an airflow mill for crushing treatment, com um consumo de ar de 1.5 m3/min and a pressure of 0.9 MPa. O óxido de níquel-cobalto-manganês resultante (Ni0.8Co0.1Mn0.1)O0.55 has an average particle size D50 of 10 μm, uma densidade solta de 2.2 g/cm3, e uma densidade compactada de 2.8 g/cm3.
Para concluir, the production method of the precursor material (Ni0.8Co0.1Mn0.1)O0.55 for nickel cobalt lithium manganese oxide cathode material involves two main steps: the preparation of nickel cobalt manganese alloy powder and the oxidation of the alloy powder to obtain nickel cobalt manganese oxide. The resulting nickel cobalt manganese oxide has a uniform particle size distribution, a high loose density, and a high compacted density, making it an ideal precursor material for the preparation of high-performance nickel cobalt lithium manganese oxide cathode material.
