Silicon Oxide (SiOx) Anode Material
CAS Number: 10097-28-6
Silicon oxide (SiOx, x≈1) anode material balances the high capacity of silicon with improved cycle stability over nano-Si, because its SiO2 matrix partially absorbs volume changes and provides mechanical buffering. Pre-lithiated SiOx grades are available to offset the high first-cycle irreversible capacity loss.
Technical Specifications
| D50 (μm) | 3–8 |
| appearance | Dark gray powder |
| purity (%) | ≥99.0 |
| capacity (mAh/g) | 1200–1500 |
| first-cycle ICE (%) | 75–85 |
| BET surface area (m²/g) | 4–10 |
Applications
- NMC pouch cell high-energy anode material (blended 5–20% with graphite)
- Cylindrical 4680 EV cell anode active material
- Pre-lithiated SiOx for high first-cycle ICE
- Solid-state battery anode material
- Consumer Li-ion high-capacity anode replacement
Key Features
- Capacity 1200–1500 mAh/g: 3–4× graphite with better cycle stability than nano-Si
- SiO2 matrix buffers volumetric expansion (~160%), far less than pure Si (~300%)
- Carbon-coated surface improves electronic conductivity and electrolyte compatibility
- Pre-lithiated grade compensates first-cycle ICE loss for improved cell energy output
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