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What Is Battery Slurry Mixing? | JCT Machinery

May 24, 2024
  • Q
    What is battery slurry mixing?
    Battery slurry mixing is a critical step in the battery manufacturing process, especially the electrodes used in lithium-ion batteries. Battery slurry mixing involves uniformly mixing ingredients such as active materials, conductive agents, binders and solvents to form a homogeneous slurry, which is then coated on the current collector to form an electrode.
Battery Slurry Components
1. Active Materials
• Positive Electrode Materials: such as lithium cobalt oxide, NCM, lithium iron phosphate, etc.
• Negative Electrode Materials: such as graphite, silicon-based materials, lithium titanate, etc.

2. Conductive Agent
Commonly used conductive agents include carbon black, CNT, conductive graphite, etc., with the purpose of improving the conductivity of the electrode.

3. Binder
Binders are used to bond active materials and conductive agents together and attach them to current collectors. Commonly used binders include PVDF, CMC and SBR.

4. Solvent
Used to dissolve the binder and bring the battery slurry to the appropriate viscosity. Common solvents include NMP for PVDF and water for CMC/SBR systems.
battery slurry            

planetary mixer            
The planetary motiion of vacuum planetary mixer provides efficient shearing and mixing, making it ideal for battery slurry mixing process.
JCT vacuum planetary mixer has good sealing performance. It can be pressurized or vacuumed, and has good exhaust and defoaming effects. Vacuum planetary mixer mixing tank is jacketed and can be heated and cooled, and is hydraulically lifted and the mixing cylinder can move freely. Usually SS316, SS304 or Q235 is used, special materials can also be used.

Key Points of Battery Slurry Mixing
  • 1. Uniformity

  • Ensuring that all ingredients are evenly distributed and preventing local concentration differences is critical to battery performance.

  • 2. Viscosity Control

  • The viscosity of battery slurry needs to be within an appropriate range to facilitate the subsequent coating process.

  • 3. Bubble Removal

  • Make sure there are no air bubbles in the slurry to avoid defects forming in the electrodes that could affect battery performance.

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