What should I pay attention to when mixing 18650 lithium battery raw materials?

The preparation of the positive (negative) electrode slurry of 18650 lithium battery is a process of mixing the positive (negative) electrode materials such as the positive (negative) electrode active material, the conductive agent, and the binder. Materials and auxiliary materials are highly dispersed in a solvent to form a Newtonian high-viscosity fluid to achieve the purpose of fully mixing and evenly dispersing active materials, conductive agents, binders and other additives. 18650 lithium battery pay attention to the control points (1) the raw materials must meet the process requirements, such as the type of material and the amount of each component added; (2) the positive electrode must not bring moisture; (3) the equipment should be dry and the indoor humidity should be controlled; (4) The dissolution process of PVDF is relatively slow. It is necessary to dissolve PVDF in NMP before pulping. CMC is also a difficult solution. Dissolve CMC in water before pulping; PVDF and CMC must be fully dissolved and dispersed evenly. If there is a particle binder Or the thickener has to increase the mixing time or change the mixing process; (5) After adding the conductive agent and the active material, the slurry should be evenly consistent, without agglomerated particles, and the bubbles in the slurry should be eliminated. The positive electrode viscosity: 4000- 10000mpa.s, negative electrode viscosity: 1500mpa.s, slurry viscosity and solid content are critical to the coating process. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.