Advanced Materials by Vivara Scientific

Silicon-Carbon Composite Anode – 420 mAh/g - 100g

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Silicon–carbon composite anode, 420 mAh/g grade. Silicon nanodomains dispersed in a carbon matrix, giving roughly 15% more capacity than graphite while keeping expansion and first-cycle losses manageable. The carbon matrix buffers silicon’s volume change and maintains electrical contact as the particle breathes.

Typical properties

Property Typical value
Material Silicon–carbon composite
Appearance Black powder
Reversible capacity ~420 mAh/g
First-cycle efficiency 85–90%
Volume expansion 20–40% (vs ~10% for graphite)
Typical use Blended at 5–20% into graphite

Figures are typical values, not guaranteed limits. A lot-specific Certificate of Analysis ships with every order.

Anode material comparison

Anode Capacity First-cycle eff. Rate capability Volume change Best for
Natural graphite 360–372 mAh/g 92–94% Moderate ~10% Cost-driven, high energy
Fast-charge graphite 340–355 mAh/g 92–94% High ~10% Fast charge and high rate
MCMB 300–330 mAh/g 90–94% High ~10% Reference and benchmark work
Silicon–carbon (420) 400–450 mAh/g 85–90% Moderate 20–40% Higher energy blends
Lithium metal 3860 mAh/g — — — Half-cells, Li-metal research

Blending guidance

Silicon content Composite capacity Trade-off
5% Si–C ~375 mAh/g Minimal impact on cycle life; easiest entry point
10% Si–C ~385 mAh/g Noticeable gain, still manageable expansion
20% Si–C ~405 mAh/g Requires binder and electrolyte optimisation
100% Si–C ~420 mAh/g Research use; expect significant capacity fade

Working with silicon anodes

Silicon expands far more than graphite on lithiation, which stresses the electrode and repeatedly ruptures the SEI. Three consequences follow. First-cycle efficiency is lower, so the cathode must be oversized to compensate. Binder choice matters more — CMC/SBR or polyacrylic acid outperform PVDF because they tolerate strain. And the electrolyte usually needs FEC or VC to build an SEI that survives repeated expansion.

Applications

  • High-energy-density anode development
  • Silicon–graphite blend optimisation
  • Binder and electrolyte additive research
  • Prelithiation and first-cycle loss studies
  • EV and consumer cell energy density programmes

Handling

Store sealed and dry. Silicon composites are more moisture-sensitive than graphite; water reacts with the silicon surface and degrades first-cycle efficiency.

Ordering

Contact us for pricing, pack sizes and current lead time. Safety data sheet and lot-specific Certificate of Analysis available on request.

Silicon-Carbon Composite Anode – 420 mAh/g - 100g

$324.01