SIENOX Battery Slurry Material Solutions

Working Condition Requirements

• Material Type: Battery slurries (lithium‑ion battery cathode slurry, anode slurry, solid‑electrolyte slurry, sodium‑ion battery slurry, etc.)

• Initial Status: A large number of micro‑scale bubbles are incorporated into battery slurries during dispersion and slurry preparation. Active material particles tend to settle and agglomerate. Direct coating easily causes bubble voids and uneven coating thickness, which seriously affects the electrochemical performance, cycle life and safety performance of batteries.

• Treatment Target: Uniformly remove micro‑scale bubbles from battery slurries, disperse active material particles evenly in binder solution, ensure uniform coating and dense defect‑free coatings, and meet high‑precision coating process requirements for lithium‑ion batteries, sodium‑ion batteries and other batteries.

Comparison Before and After Improvement

Before Improvement — Pain Points of Traditional Processes

Battery slurry is the core material of new‑energy batteries such as lithium‑ion batteries and sodium‑ion batteries. Its quality directly determines the electrochemical performance, cycle life and safety performance of batteries. However, slurries are highly prone to bubble entrapment during dispersion and mixing, and traditional treatment methods face multiple challenges:

• Coating defects induced by bubbles: Residual bubbles in slurries form voids and pinholes during coating, leading to uneven coating thickness, inconsistent internal resistance and local overheating of batteries, which severely impair battery safety performance.

• Uneven distribution of active materials: Active material particles feature higher density than solvents. Traditional stirring easily causes sedimentation or agglomeration, resulting in inconsistent active‑material concentration in different coating zones and fluctuations in battery capacity and cycle life.

• Particle damage from high‑speed dispersion: Excessive shear force of traditional high‑speed dispersers may damage the morphology of active‑material particles or break conductive‑agent network structures, impairing battery rate performance.

• Difficult‑to‑guarantee batch consistency: Large uniformity fluctuations exist among batches with conventional methods, leading to inconsistent coating thickness and areal density, and low battery yield.

Solutions

• Vacuum Defoaming + Planetary Motion: Under vacuum conditions, powerful shear and convection are generated by planetary rotation‑revolution motion. Micro‑scale bubbles inside slurries gradually rise and are extracted for thorough defoaming.

• Uniform Dispersion of Active Materials: Planetary motion delivers 360° dead‑zone‑free mixing. Active‑material particles are redispersed in a mild and uniform force field without damaging particle morphology or conductive‑agent networks.

• High Batch Consistency: Parameterized control over rotating speed, time and vacuum degree ensures consistent treatment effects for every batch, with stable coating thickness and areal density.

• Compatible with High‑Precision Coating: Treated slurries are applicable for high‑precision processes including lithium‑ion‑battery electrode coating and solid‑state‑battery electrolyte‑layer coating, bringing remarkable improvements in battery performance and yield.

Advantages of Stirring‑Defoaming Machine

• Efficient Removal of Micro‑Scale Bubbles: Vacuum environment combined with planetary motion effectively eliminates micro‑sized bubbles in slurries and eliminates hidden risks of coating voids and pinholes.

• Uniform Dispersion of Active Materials: Gentle and uniform planetary rotation‑revolution motion enables non‑destructive dispersion of active‑material particles while preserving original electrochemical performance.

• Precisely Controllable Parameters: Adjustable rotating speed, time and vacuum degree for precise process‑parameter optimization for different slurry formulas.

• Excellent Batch Consistency: Standardized treatment procedures guarantee uniform slurries across batches with stable coating thickness and areal density.

• High Efficiency & Time‑Saving: The whole stirring‑defoaming process is completed within several minutes, greatly boosting production efficiency.

• Suitable for High‑Precision Coating: Treated slurries satisfy high‑precision process requirements for lithium‑ion‑battery electrode coating and solid‑state‑battery electrolyte‑layer coating.

Test Conditions

Comparison Before and After Stirring

Mature Application Fields

✅ Lithium‑ion Battery Cathode Slurry

✅ Lithium‑ion Battery Anode Slurry

✅ Solid‑State Battery Electrolyte Slurry

✅ Sodium‑ion Battery Slurry

✅ Fuel‑Cell Catalyst Slurry

✅ Supercapacitor Slurry

***SIENOX has more than 1800 material stirring‑defoaming cases, free sample testing and trial machine test available