Production process of lithium battery cathode material

Lithium-ion battery cathode material production process The performance of the lithium-ion battery cathode material directly affects the performance of the lithium-ion battery, and its cost directly determines the cost of the battery. There are many industrial production processes for cathode materials, the synthesis route is relatively complicated, and the control of temperature, environment, and impurity content is relatively strict. There are many industrial production processes for cathode materials, and the synthesis route is relatively complicated. The control of temperature, environment, and impurity content is also strict. The cathode materials mainly include lithium cobaltate, lithium manganate, lithium iron phosphate, ternary materials, etc. . The calcination technology adopts the new microwave drying technology to dry lithium-ion battery cathode materials, which solves the long-term use of conventional lithium-ion battery cathode material drying technology, slower capital turnover, uneven drying, and insufficient drying depth. The specific features are: 1. It adopts microwave drying equipment for lithium ion battery cathode material, which is fast and rapid, and deep drying can be completed in a few minutes, which can make the final moisture content reach more than one thousandth; 2. The drying is uniform, and the product drying quality is good; 3. Lithium ion battery The positive electrode material is highly energy-efficient, safe and environmentally friendly; 4. It has no thermal inertia, and the immediate heating is easy to control. Microwave sintered lithium ion battery cathode materials have the characteristics of fast heating speed, high energy utilization, high heating efficiency, safety and health and no pollution, and can improve the uniformity and yield of the product, and improve the microstructure and performance of the sintered material. The general preparation method of lithium ion battery cathode material 1. The solid phase method generally selects lithium salt such as lithium carbonate and cobalt compound or nickel compound after grinding and mixing, and then sintering reaction. The advantage of this method is that the process flow is simple and the raw materials are easily available. It belongs to the method that has been extensively researched and developed in the early stage of the development of lithium-ion batteries. The foreign technology is relatively mature; the disadvantage is that the prepared cathode material has limited capacitance, poor mixing uniformity of raw materials, and the preparation of The performance stability is not good, and the quality consistency between batches is poor. 2. Complex method The complex method uses organic complexes to first prepare complex precursors containing lithium ions and cobalt or vanadium ions, and then sinter to prepare them. The advantages of this method are molecular-scale mixing, material uniformity and performance stability, and the positive electrode material has a higher capacitance than the solid phase method. It has been tested abroad as an industrial method for lithium-ion batteries. The technology is not mature, and it is currently rare in China. Report. 3. The sol-gel method uses the method of preparing ultrafine particles developed in the 1970s to prepare cathode materials. This method has the advantages of the complex method, and the capacitance of the prepared electrode materials is greatly improved. A method that is rapidly developing at home and abroad. The disadvantage is that the cost is high, and the technology is still in the development stage. 4. The LiMnO2 prepared by the ion exchange method has a reversible discharge capacity of 270mAh/g. This method has become a new research focus. It has the characteristics of stable electrode performance and high capacitance. However, the process involves energy-consuming and time-consuming steps such as solution recrystallization and evaporation, which is far from practical. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: What is the charging voltage of the lithium battery? What are the charging principles