Silicon Powder
Silicon powder (CAS number 7440-21-3) is a semiconducting material with a bandgap of 1.12 eV. It was a dominant material during the late 20th century to early 21st century, referred to as the 'Silicon Age'.
Silicon powder recently draws attention on its application as an anode material for Li-ion batteries, owing to its high theoretical capacity of 3579 mAh/g (for Li15Si4). Si-based anodes show high energy density, limit growth of interphase, and are free of Li dendrites in solid state batteries.
Silicon powder can easily be engineered with other materials for high-performance batteries with a specific capacity of 913 mAh/g. Silicon powder can be further functionalized with vinylene carbonates and polyethylene oxides for enhanced stability.
| CAS Number | 7440-21-3 |
|---|---|
| Chemical Formula | Si |
| Full Name | Silicon |
| Molecular Weight | 28.09 g/mol |
| Synonyms | Si powder, Silicon particles, Silicon microparticles, Silicon nanoparticles |
| Classification or Family | Batteries, Photocatalysis, Fuel cells, Anode active materials, Solid-state batteries |
| Product Code | M2442A1 | M2442B1 |
|---|---|---|
| Purity | > 99.5% | > 99.99% |
| Average Particle Size | 90 nm | 10 µm |
| Crystal Structure | Polycrystalline | Diamond cubic |
| True Density | 2.3 g/cm3 | 2.3 g/cm3 |
| Specific Surface Area | 45 – 80 m2/g | N/A |
| Appearance | Dark brown powder |
Dark grey/blue powder |
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