Nano Silicon (Si) Anode Powder
CAS Number: 7440-21-3
Battery-grade nano silicon powder enables next-generation high-energy-density lithium-ion anodes with theoretical capacity ~10× greater than graphite (3579 mAh/g). Carbon-coated or bare nano-Si is used as a blending agent with graphite (5–15 wt%) to increase cell energy density while managing volumetric expansion through nano-size engineering.
Technical Specifications
| D50 (nm) | 80–200 |
| appearance | Gray to dark gray powder |
| purity (%) | ≥99.5 |
| carbon coating (%) | 0 or 3–8 (coated grade) |
| oxygen content (%) | ≤2 |
| BET surface area (m²/g) | 10–30 |
Applications
- Graphite/nano-Si blended anode (5–15 wt% Si)
- High-energy-density EV battery next-gen anode
- Silicon-dominant anode (>50% Si) with PAA/PI binder
- Solid-state battery Si-Li composite anode
- Research-grade electrode development
Key Features
- Nano-size (80–200 nm) reduces fracture during lithiation/delithiation cycling
- Carbon-coated grade improves first-cycle ICE and electronic conductivity
- High purity (≥99.5%) minimizes irreversible capacity from surface oxide
- Tight particle size distribution ensures homogeneous mixing with graphite in slurry
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