Ternary CR2032 button cell batteries cathode material production process and advantages

　　Production process and advantages of cathode materials for ternary lithium batteries. The cathode material mainly provides lithium ions for the battery, which determines the energy density, lifespan, safety, use field, etc. of the battery. Commonly used cathode materials on the market mainly include lithium iron phosphate, lithium manganate, lithium cobalt oxide and ternary materials. , among which the ternary materials are divided into nickel cobalt manganese NCM and nickel cobalt aluminum NCA.

　　Ternary CR2032 button cell batteries cathode material production process

　　The three main links in the production of ternary cathode 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 CR2032 button cell batteries 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 CR2032 button cell batteries 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 cathode 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 CR2032 button cell batteries 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, sponges and other elastic items are used on both sides to remove the air from 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.

　　One of the important quality indicators of ternary CR2032 button cell batteries cathode materials is particle size and particle size distribution. Particle size and particle size distribution will affect the specific surface area, tap density, compaction density, processing performance and point chemical properties of ternary materials. Therefore, the particle size and particle size distribution of ternary materials used in lithium-ion batteries need to be strictly controlled.

　　Advantages of ternary cathode materials for lithium batteries

　　1. CR2032 button cell batteries ternary cathode materials are inexpensive and low cost

　　2. The cycle performance is better than normal lithium cobalt oxide

　　3. The gram capacity is slightly higher than that of lithium cobalt oxide

　　4. Capacity and security are relatively balanced

　　5. Good overcharge resistance and easy to synthesize

　　6. When charging and discharging with large current, the polarization is small. The battery can be continuously charged at 3C and discharged at 5C with high input and output capabilities.

　　Under the general trend of the booming ternary CR2032 button cell batteries industry, many domestic cathode material companies are facing huge foreign patent fees in their development. Domestic ternary material patent applications are relatively scattered, especially leading companies are less involved, and the overall research atmosphere is not strong. Domestic companies need to pay attention to the research and development of cathode materials and the protection of intellectual property rights; secondly, the safety and cost issues of ternary materials, etc. There is a lot of room for development. At present, the layout of foreign applicants is not perfect. Therefore, if domestic companies can increase R&D investment in these aspects and master core patents as early as possible, they will be able to achieve "overtaking in the corner" in the field of ternary materials.

　　Ternary CR2032 button cell batteries materials have excellent characteristics such as high capacity, low cost, and good safety, and have good development prospects in the field of power lithium batteries. Taking advantage of the advantages of high energy density and relatively low cost of ternary materials, in the next 3 to 5 years, the use of ternary materials in power batteries will become mainstream, and high-end ternary material power batteries will be in short supply.

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