Carbon-Coated Silicon Powder (C@Si)
C@Si powder buffers silicon's large volume expansion during lithium-ion cycling with a conductive carbon shell, enabling high-capacity silicon-blended anodes for next-generation battery cells.
~5 wt% CCoating Content
D50 1.6-8.6 µmParticle Size Range
Custom Made-to-OrderGrade, Size & Quantity
WorldwideExport Shipping
Carbon-Coated Silicon Powder — Grades & Specifications
Carbon-Coated Silicon Powder (C@Si) powder is supplied across a range of grades, particle sizes and coating ratios. The options below are typical; specify your target values in the request form and we will confirm availability, lead time and pricing.
| Material | Carbon-Coated Silicon Powder (C@Si) |
|---|---|
| Category | Carbon-Coated Powder |
| Core material | Silicon (CAS 7440-21-3) |
| Coating / shell material | Amorphous carbon |
| Coating content | Approximately 5 wt% carbon on common commercial grades, with a wider 5-15 wt% range depending on nanostructure loading and cycling targets |
| Particle size | D50 approximately 1.6-8.6 um depending on secondary-particle design; BET surface area roughly 20-25 m²/g on nano-Si@C grades |
| Morphology | Nanostructured silicon core (nanoparticles, nanowires or porous Si) encapsulated by an amorphous carbon shell, often agglomerated into micron-scale secondary particles |
| Appearance | Black powder |
| Electrochemical Performance | First-cycle efficiency around 88-93% with first charge capacity commonly 1800-2170 mAh/g depending on grade; the carbon coating buffers silicon's large volume expansion during lithiation and maintains electrical contact |
| Typical applications | EV Battery Anodes, High-Energy Consumer Electronics Cells, Cylindrical & Pouch Cell Anodes, Fast-Charging Power Tool Batteries |
Applications by Industry
EV Battery AnodesBlended into graphite anodes to boost energy density in high-range electric-vehicle cells.
High-Energy Consumer Electronics CellsUsed in premium smartphone and laptop batteries needing higher volumetric energy density.
Cylindrical & Pouch Cell AnodesApplied in cylindrical, flexible-pouch and aluminum-shell cell formats.
Fast-Charging Power Tool BatteriesSi/C blends support the higher C-rates power tools demand.
Lithium-Metal & Li-S Battery AnodesUsed in next-generation lithium-metal and lithium-sulfur cell chemistries.
Grid & ESS Battery CellsSilicon-enhanced anodes adopted in stationary storage packs to reduce footprint.
Particle Size & Mesh Conversion
Reference for converting between US mesh and microns/millimetres. Figures are nominal sieve openings and may vary slightly by standard.
| Mesh (US) | Micron (µm) | mm | Inch | Remarks |
|---|---|---|---|---|
| 3 | 6730 | 6.730 | 0.2650 | |
| 4 | 4760 | 4.760 | 0.1870 | |
| 5 | 4000 | 4.000 | 0.1570 | |
| 6 | 3360 | 3.360 | 0.1320 | |
| 7 | 2830 | 2.830 | 0.1110 | |
| 8 | 2380 | 2.380 | 0.0937 | |
| 10 | 2000 | 2.000 | 0.0787 | |
| 12 | 1680 | 1.680 | 0.0661 | |
| 14 | 1410 | 1.410 | 0.0555 | |
| 16 | 1190 | 1.190 | 0.0469 | |
| 18 | 1000 | 1.000 | 0.0394 | |
| 20 | 841 | 0.841 | 0.0331 | |
| 25 | 707 | 0.707 | 0.0278 | |
| 30 | 595 | 0.595 | 0.0234 | |
| 35 | 500 | 0.500 | 0.0197 | |
| 40 | 420 | 0.420 | 0.0165 | |
| 45 | 354 | 0.354 | 0.0138 | |
| 50 | 297 | 0.297 | 0.0117 | |
| 60 | 250 | 0.250 | 0.0098 | |
| 70 | 210 | 0.210 | 0.0083 | |
| 80 | 177 | 0.177 | 0.0070 | |
| 100 | 149 | 0.149 | 0.0059 | |
| 120 | 125 | 0.125 | 0.0049 | |
| 140 | 105 | 0.105 | 0.0041 | |
| — | 100 | 0.100 | 0.0039 | Sand |
| 170 | 88 | 0.088 | 0.0035 | |
| 200 | 74 | 0.074 | 0.0029 | |
| — | 70 | 0.070 | 0.0027 | |
| 230 | 63 | 0.063 | 0.0024 | Human hair |
| — | 55 | 0.055 | 0.00217 | |
| 270 | 53 | 0.053 | 0.0021 | |
| — | 50 | 0.050 | 0.00197 | |
| 325 | 44 | 0.044 | 0.0017 | |
| — | 40 | 0.040 | 0.00157 | |
| 400 | 37 | 0.037 | 0.0015 | |
| 550 | 25 | 0.025 | 0.00099 | |
| 625 | 20 | 0.020 | 0.00079 | |
| 1200 | 12 | 0.012 | 0.0005 | |
| 1250 | 10 | 0.010 | 0.000394 | |
| — | 7 | 0.007 | 0.000276 | |
| 2500 | 5 | 0.005 | 0.000197 | |
| 4800 | 3 | 0.003 | 0.000118 | |
| 5000 | 2.5 | 0.0025 | 0.000099 | Bacteria (approx.) |
| 12000 | 1 | 0.001 | 0.0000394 |
Information Required for Quotation
- Grade or type
- Particle size (micron or mesh)
- Coating content / core-shell ratio
- Quantity
- Application environment
- Required delivery country
Lead time depends on grade, particle size, quantity and processing requirements. Export availability can be reviewed based on destination country and material type. A Certificate of Analysis can be provided on request.
Request a Quote or Custom Order
Tell us your grade, particle size and quantity. We typically reply within one business day.
Frequently Asked Questions
What is the coating content of Carbon-Coated Silicon Powder?
Approximately 5 wt% carbon on common commercial grades, with a wider 5-15 wt% range depending on nanostructure loading and cycling targets Other coating ratios can be reviewed on request depending on your application and quantity.
What particle sizes can you supply?
D50 approximately 1.6-8.6 um depending on secondary-particle design; BET surface area roughly 20-25 m²/g on nano-Si@C grades Mesh-based requirements are also accepted; a mesh-to-micron conversion reference is provided on the page.
Can Carbon-Coated Silicon Powder be made to custom specifications?
Yes. Carbon-Coated Silicon Powder is produced to order — core/shell ratio, particle size, morphology and packaging can be customized to your specification. Select “Custom Order” in the request form and provide your target values.
What is the minimum order quantity (MOQ)?
Order quantity is flexible and small quantities and prototype requests are welcome. Please state your required quantity in the form for an accurate quotation.
Can you export and ship Carbon-Coated Silicon Powder internationally?
Yes, export inquiries are welcome. Availability and shipping are reviewed based on destination country, grade and quantity.
Do you provide a Certificate of Analysis (COA) or technical data?
A Certificate of Analysis and technical data can be provided on request for supplied lots.
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Request a Quote for Carbon-Coated Silicon Powder
Send us your grade, particle size, quantity and application. We will review availability, quotation and lead time. Small quantities, prototypes and custom made-to-order specifications are welcome.