Polyacrylic Acid (PAA) Binder for Silicon Anode
CAS Number: 9003-01-4
Polyacrylic acid (PAA) is a high-performance aqueous binder specifically developed for high-silicon-content (>10%) and pure silicon anodes, where its abundant carboxylic acid groups form strong covalent and hydrogen bonds with silicon oxide surface groups to maintain electrode integrity through severe volume cycling.
Technical Specifications
| appearance | White to off-white powder or solution |
| moisture (%) | ≤5 (powder grade) |
| pH (1% solution) | 2.5–3.5 |
| solid content (%) | 35–40 (solution grade) |
| molecular weight (g/mol) | 450,000–3,000,000 |
Applications
- High-silicon (>10 wt%) and nano-Si anode binder
- SiOx/graphite composite anode electrode formulation
- Cross-linked PAA/CMC binder network for Si anode
- Next-generation fast-charging Si anode cells
- Lithium-silicon solid-state battery electrode
Key Features
- High carboxylic acid density forms the strongest binder-silicon interfacial bonds
- Self-healing hydrogen bond network maintains electrode integrity through 300% volume expansion
- Water-soluble: enables green, NMP-free electrode manufacturing
- Cross-linkable with CMC or polyvinyl alcohol for enhanced mechanical strength
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