Silicon Nanopowder

CAS Number 7440-21-3

Anode Active Materials, Battery Materials, Green Energy Materials, Inorganic Electronic Materials, Materials

High Purity (>99.5%) Silicon Nanopowder, D₅₀ of 90 nm

Applied as an anode material for Li-ion batteries

Overview | Product Information | Related Products

Silicon nanopowder (CAS number 7440-21-3) is a semiconducting material with a bandgap of 1.12 eV. Our battery-grade silicon nanopowder offers 99.5% purity and an average particle size (D₅₀) of 90 nm.

Silicon nanopowder is widely explored as an anode material for Li-ion batteries due to its high theoretical capacity of 3579 mAh/g (Li₁₅Si₄). Si-based anodes deliver high energy density, limit growth of interphase, and are free of Li dendrites in solid state batteries. Nanosizing helps mitigate the large volume expansion (~300%) during lithiation, improving structural integrity and cycle life.

Green Energy Material

For battery research

Nanoscale Particle Size

D₅₀ of 90 nm

Worldwide Shipping

Quick and reliable shipping

High Purity

>99.5% High purity

Its high surface area enhances lithium-ion diffusion and enables faster charge/discharge rates. Silicon nanopowder can also be engineered with conductive materials like graphene or carbon nanotubes to improve electrical conductivity and mechanical stability.

Beyond Li-ion applications, it is being explored for use in Li-S, Na-ion, thermoelectric, and photovoltaic devices. Silicon nanopowder can be further functionalized with vinylene carbonate, polyethylene oxide, or other surface modifiers for enhanced performance and stability.

General Information

CAS Number	7440-21-3
Chemical Formula	Si
Full Name	Silicon
Molecular Weight	28.09 g/mol
Synonyms	Si nanopowder, Silicon nanoparticles, Silicon nanopowder, Silicon nanoparticles
Classification or Family	Batteries, Photocatalysis, Fuel cells, Anode active materials, Solid-state batteries

Silicon Powder

Product Code	M2442A1
Purity	> 99.5%
Average Particle Size	90 nm
Crystal Structure	Polycrystalline
True Density	2.3 g/cm³
Specific Surface Area	45 – 80 m²/g
Appearance	Dark brown powder

MSDS Documentation

Silicon powder MSDS Sheet

References

Dry pre-lithiation for graphite-silicon diffusion-dependent electrode for all-solid-state battery, J. Lee et al., Adv. Energy Mater., 13, 2300172 (2023); DOI: 10.1002/aenm.202300172.
Functionalized silicon particles for enhanced half- and full-cell cycling of Si-based Li-ion batteries, K. Araño et al., ACS Appl. Mater. Interfaces, 15 (8), 10554–10569 (2023); DOI: 10.1021/acsami.2c16978.
High-performance silicon carbon anodes based on value-added recycling strategy of end-of-life photovoltaic modules, Q. Liao et al., Energy, 281, 128345 (2023); DOI: 10.1016/j.energy.2023.128345.

Building better solid‐state batteries with silicon‐based anodes, Z. Sun et al., Interdiscip. Mater., 2, 635–663 (2023); DOI: 10.1002/idm2.12111.
Constructing pure Si anodes for advanced lithium batteries, M. Je et al., Acc. Chem. Res., 56, 2213–2224 (2023); DOI: 10.1021/acs.accounts.3c00308.
Nanostructured silicon photocatalysts for solar-driven fuel production, S. Putwa et al., iScience, 26, 106317 (2023); DOI: 10.1016/j.isci.2023.106317.

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