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Advanced Materials by Vivara Scientific
SBR Binder – Styrene-Butadiene Rubber Emulsion for Aqueous Anode Slurry - 100g
$59.99
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$59.99
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Styrene-butadiene rubber (SBR) binder emulsion. The elastic half of the standard aqueous anode binder system. SBR provides adhesion and flexibility while CMC provides viscosity and dispersion; together they replace PVDF/NMP and remove solvent recovery from the electrode coating line entirely.
Properties
| Property | Value |
|---|---|
| Type | Styrene-butadiene rubber, aqueous emulsion |
| Appearance | Milky white latex |
| Carrier | Water |
| Function | Adhesion and mechanical flexibility |
| Normally paired with | Sodium carboxymethyl cellulose (CMC) |
| Typical CMC:SBR ratio | 1:1 to 1:2 by dry weight |
| Typical total binder | 1.5–3 wt% of dry electrode |
Full specification and lot-specific Certificate of Analysis available on request.
Binder system comparison
| System | Solvent | Typical use | Advantage | Trade-off |
|---|---|---|---|---|
| CMC + SBR | Water | Graphite and Si anodes | No solvent recovery, low cost, safe | Not for water-sensitive actives |
| PVDF | NMP | Cathodes, some anodes | Wide electrochemical window | Toxic solvent, recovery cost |
| PAA / PAA-Na | Water | High-silicon anodes | Tolerates large volume change | Brittle if over-dried |
| LA132 / LA133 | Water | Cathodes and anodes | Aqueous cathode processing | Narrower supply base |
Why CMC and SBR are used together
Neither works alone. CMC is a stiff, water-soluble polymer that controls slurry viscosity and keeps graphite dispersed, but a CMC-only electrode is brittle and cracks on calendering. SBR is a soft latex that bonds particles elastically, but on its own it does not build viscosity and the slurry settles. The combination gives a coatable slurry and a flexible electrode, at roughly a third of the binder loading a PVDF system would need.
Applications
- Aqueous graphite anode slurries
- Silicon and silicon–graphite anodes, where flexibility matters most
- Water-based LFP cathode slurries
- Binder loading reduction studies
- NMP-free electrode process development
Handling
Add SBR last, after the CMC solution and active material are fully dispersed, and mix at low shear. High shear coagulates the latex into visible specks that will not redisperse. Do not freeze — freezing irreversibly breaks the emulsion. Store cool and use within the stated shelf life.
Ordering
Contact us for pricing, pack sizes and current lead time. Safety data sheet and lot-specific Certificate of Analysis available on request.
