Styrene-Butadiene Rubber (SBR) Anode Binder
CAS Number: 9003-55-8
SBR latex is the standard aqueous binder for graphite and silicon-graphite composite anodes in lithium-ion batteries, used in combination with CMC thickener. Its rubber-like elasticity accommodates volumetric changes during cycling, while the aqueous formulation avoids NMP solvent, reducing manufacturing cost and environmental impact.
Technical Specifications
| pH | 6.5–8.5 |
| appearance | Milky white latex |
| solid content (%) | 48–52 |
| particle size (nm) | 100–200 |
| styrene content (%) | 20–30 |
| viscosity (mPa·s, 25°C) | 20–100 |
Applications
- Graphite anode aqueous slurry binder (paired with CMC)
- Silicon-graphite composite anode binder
- Hard carbon sodium-ion battery anode binder
- LTO (lithium titanate) anode binder
- Flexible thin-film battery electrode binder
Key Features
- Elastic binder matrix accommodates 10–15% graphite volume change during Li intercalation
- Aqueous processing eliminates NMP and its associated health, safety, and recovery costs
- Excellent adhesion to copper current collectors for minimal interface resistance
- Thermally stable up to 250°C, suitable for high-temperature electrolyte formation processes
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