The production process flow of ternary cathode materials for lithium batteries. Lithium battery ternary cathode materials dominate the future trend, and high nickel and high voltage lead technological changes. As the standards for cruising range of new energy vehicles increase, traditional lithium iron phosphate power batteries gradually give way to ternary cathode material batteries. Since the cathode materials for power batteries with high energy density currently on the market are all ternary materials with different proportions, this article will start with ternary materials and introduce the industrial production methods of the materials.

　　Production process flow of ternary cathode materials for lithium batteries

　　The three main links in the production of ternary materials for lithium batteries are mixing abrasives, high-temperature sintering, and crushing and decomposition. The control of each link and the performance of the equipment will have a direct or indirect impact on the final product. Among them, grading, screening and packaging are the final steps of ternary materials. Let’s take a look at these steps.

　　●Grading

　　The particle size distribution of ternary lithium battery materials will affect the material's specific surface area, compaction density, pole piece processing performance and battery electrical properties. 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 classification equipment. For the classification of ternary materials, an airflow classification device is generally added after the airflow pulverizer to directly classify the crushed products.

　　According to the particle size distribution requirements of ternary materials, different airflow classifiers and classification processes can be selected.

　　●Screening

　　In order to avoid foreign matter or coarse particles in the material, the lithium battery ternary materials also need to be screened. The Dmax of ternary materials is at least less than 50μm, but sometimes Dmax exceeds the standard. The vibrating screen has high screening efficiency, generally 80% to 95%; the particle size range of the screened raw materials 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 kind of screen requires special transmission equipment and consumes power.

　　For the entire work of the vibrating screen, the most important components are the screen, motor and bearings. In the use of ternary materials for lithium batteries, the selection of screens is critical. Because the production process of ternary materials should avoid bringing in iron impurities or other metals, the screen material needs to be non-metallic and resistant to alkali corrosion.

　　●Packaging

　　Ternary lithium battery material packaging generally adopts vacuum packaging or vacuum and then filled with inert gas. There are many types of vacuum packaging machines, usually divided into mechanical extrusion type, intubation type, chamber conveyor type, rotary table type and thermoforming type. The principle of mechanical extrusion vacuum packaging is: after the packaging bag is filled, elastic items such as sponges are used on both sides to remove the air in the bag, and then the bag is sealed. This method is the simplest, but has a low vacuum degree and is used in situations where the vacuum degree is not high.

　　At present, lithium battery cathode materials are mainly lithium cobalt oxide, lithium manganate, lithium iron phosphate, and ternary cathode materials, which are mainly used in 3C, power batteries, and energy storage fields. At present, lithium-ion battery cathode materials are mainly lithium cobalt oxide, lithium manganate, lithium iron phosphate, and ternary cathode materials, which are mainly used in 3C, power batteries, and energy storage fields.

　　The mass production technology of ternary cathode materials for lithium batteries has just started, and it will take a long time to accumulate experience in terms of battery technology, supporting technology, application characteristics, safety strategies, etc. before it can embark on a bright road.

　　From the perspective of the development of lithium battery materials, the irreversible demand for high energy density development has made ternary batteries a general trend, and at the same time driven the market demand for ternary lithium battery materials to rise. As the production capacity of battery and lithium battery materials companies is released one after another, competition among companies will intensify. Only by continuously strengthening technological innovation, mastering core technologies, and improving the quality of their own products can companies seek greater development.

　　Ternary lithium battery cathode materials will benefit from the rapid development of new energy vehicles and the increasing penetration rate of ternary cathodes in the next few years, and are expected to achieve a compound annual growth rate of 80% in the future. Compared with lithium iron phosphate batteries, ternary lithium batteries have higher energy density and are in line with the trend of vehicle model upgrades. Therefore, the proportion of ternary materials is gradually increasing.

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