Introduction to the requirements of lithium-ion battery manufacturers for cathode materials

The requirements of lithium ion battery manufacturers for cathode materials 1. The reaction of lithium ion batteries should have a large Gibbs free energy to ensure that high battery voltage can be supplied; 2. The Gibbs free energy change during the discharge process should be small to Ensure that the output voltage is close to a constant; 3. The positive and material should have a low oxidation potential, that is, a higher voltage related to metal lithium; 4. It is as light as possible, but it can store a large amount of lithium to ensure a larger capacity; 5. Lithium-ion batteries have good electronic conductivity; 6. The structure is stable within all operating voltages, ensuring a long cycle life; 7. Lithium-ion battery materials are cheap and low-toxic. 8. The particle size of the cathode material will directly affect the preparation of lithium-ion battery slurry and pole pieces. Generally, large particle size material slurry has low viscosity and good fluidity, and can use less solvent and high solid content. 9. The density of the positive electrode material is closely related to the atomic weight of the elements contained in it, crystal arrangement method, crystallinity degree, sphericity, particle size and distribution, density, etc., and is affected by the preparation process. The density of the positive electrode material is divided into loose packing density, tap density, powder compaction density, pole piece compaction density, theoretical density and so on. 10. Lithium-ion batteries have a large diffusion coefficient in the positive electrode material, and can maintain the required speed under different current charging and discharging conditions. Generally speaking, the key performance indicators of lithium ion battery cathode materials include: chemical composition, crystal structure, particle size distribution, tap density, specific surface area, pH value, first discharge specific capacity, first charge and discharge efficiency, cycle life, etc. The performance of lithium-ion batteries depends on the structure and performance of the internal materials used in the battery, and the positive electrode material is more directly decisive. Therefore, the positive electrode material of the lithium-ion battery must meet the basic performance requirements of the lithium-ion battery. 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: Why choose solar lithium-ion batteries more than lead-acid batteries?