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What should you pay attention to when mixing lithium battery materials?

From:CTECHI GROUP Limited     Release time:2019-10-09

Overview:Lithium battery positive (negative) pole slurry preparation, is a mixing process of mixing positive (negative) polar active materials, conductive agents, binders and other positive (negative) polar materials, the mixture is battery active material And the auxiliary material is highly dispersed in a solvent to form a Newtonian high-viscosity fluid, and the purpose of fully mixing and uniformly dispersing the active material, the conductive agent, the binder and other additives is achieved.

What should you pay attention to when mixing lithium battery materials?

Lithium battery positive (negative) pole slurry preparation, is a mixing process of mixing positive (negative) polar active materials, conductive agents, binders and other positive (negative) polar materials, the mixture is battery active material And the auxiliary material is highly dispersed in a solvent to form a Newtonian high-viscosity fluid, and the purpose of fully mixing and uniformly dispersing the active material, the conductive agent, the binder and other additives is achieved.

Points to note:

(1) The raw materials should meet the process requirements, such as the type of material and the amount of each component added;

(2) The positive electrode cannot be brought into moisture;

(3) The equipment should be dry and control the humidity in the room;

(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. Before milling, CMC should be dissolved in water. PVDF and CMC should be fully dissolved and evenly dispersed. The binder or thickener must increase the mixing time or change the mixing process;

(5) After adding conductive agent and active material, the slurry should be uniform and uniform, there is no agglomerated particles, and the bubbles in the slurry should be removed, the positive electrode viscosity: 4000-10000mpa.s, the negative electrode viscosity: 1500mpa.s, slurry viscosity The solids content is critical to the impact of the grouting process.


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