What are the processing techniques of the cathode materials for ternary lithium batteries?

Ternary lithium battery cathode material processing technology The three important steps of lithium battery ternary cathode material processing are mixing and grinding, high temperature sintering, crushing and decomposition. The control of each link and the performance of the equipment will directly or indirectly affect the final product. . Among them, grading, screening and packaging are the final links of ternary materials. Let us know these links. ●The particle size distribution of graded ternary lithium battery materials will affect the material's specific surface area, compaction density, pole piece production performance and battery electrical performance. The crushing equipment can only control the particle size of the material, but cannot control the particle size distribution of the material. If you want to control the particle size distribution of the material, you must use a grading device. The classification of ternary materials is generally followed by a jet pulverizer with an air flow classification device to directly classify the crushed products. According to the particle size distribution requirements of ternary materials, different air classifiers and classification processes can be selected. ●Sieving is to prevent foreign matter or coarse particles in the material, and ternary materials of lithium battery need to be sieved. The Dmax of ternary materials is at least less than 50μm, but sometimes Dmax exceeds the standard. The screening efficiency of vibrating screen is high, generally 80%-95%; the range of the raw material size for screening is large, from more than 250mm to 0.1mm or 0.01mm; the output per unit area is large; it is easy to adjust, and the screen holes are less blocked. This screen requires special transmission equipment and consumes power. Regarding the entire work of the vibrating screen, the most important components are the screen, the motor and the bearing. In the use of ternary cathode materials for lithium batteries, the selection of screens is critical. Because the manufacturing process of the ternary material should prevent iron impurities or other metals from being introduced, the material of the screen should be non-metallic and resistant to alkali corrosion. ●Packaging The packaging of ternary lithium battery materials generally adopts vacuum packaging or is filled with inert gas after vacuum. There are many varieties of vacuum packaging machines, which are usually divided into mechanical extrusion type, intubation type, chamber conveyor belt type, rotary table type and thermoforming type. The principle of mechanical squeeze vacuum packaging is: After the packaging bag is filled, use elastic items such as sponges to remove the air from the bag on both sides, and then seal the bag. This method is the simplest, but the vacuum degree is low, and it is used in occasions where the vacuum degree is not high. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: What are the advantages of 18650 lithium battery?