Sulfur-Carbon Composite Powder

CAS Number 7440-44-0 / 7704-34-9

Battery Materials, Cathode Active Materials, Inorganic Electronic Materials

Sulfur-Carbon Composite Powder CAS 7440-44-0 / 7704-34-9

A cathode composite material for lithium sulfur batteries

with high sulfur content for high discharge capacity and energy density

Overview | Product Information | Related Products

Sulfur-carbon composite (CAS number 7440-44-0/7704-34-9) is a cathode active material used in lithium-sulfur (Li–S) batteries. Li–S batteries have an exceptionally high theoretical energy density of 2600 Wh/kg and specific capacity of 1672 mAh/g. Sulfur-carbon composite is synthesized through melt diffusion at 155°C for 12 hours from ground sulfur and carbon powder. Carbon acts as a host material in the sulfur-carbon composite, providing sufficient conductive surface and ion/electron transport channels, particularly at high sulfur loading and great electrode thickness. Sulfur-carbon composite enhances electrolyte permeability, allowing fast reactions between lithium ions and sulfur.

Sulfur-carbon composite with vary sulfur content from 40-70% can achieve discharge capacities of 500-900 mAh/g, with 50-70% capacity retention over 50-150 cycles.

High Specific Energy Density

For high power batteries

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Affordable battery R&D

Versatile Material

EVs, power tools, and grid storage

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General Information

CAS Number	7440-44-0 (carbon);7704-34-9 (sulfur)
Chemical Formula	C(S)
Full Name	Sulfur carbon composite
Molecular Weight	44.08 g/mol
Synonyms	Carbon sulfur composite, C-S composite, S-C composite, S/C composite, C/S composite
Classification or Family	Battery materials, Cathode active materials, Lithium sulfur material

Product Details

Purity	>99.45% (TGA)
Sulfur Content	69 ± 1% (TGA)
Carbon Content	30 ± 1% (TGA)
Particle Size	80 meshes (sieving method)
Appearance	Black powder

MSDS Documentation

Sulfur-Carbon Composite powder MSDS Sheet

References

Accelerating lithium-ion transfer and sulfur conversion via electrolyte engineering for ultra-stable all-solid-state lithium-sulfur batteries, M. Li et al., Adv. Funct. Mater., 35, 2413580 (2025); DOI: 10.1002/adfm.202413580.
Advances in high sulfur loading cathodes for practical lithium-sulfur batteries, M. Wang et al., Adv. Energy Mater., 12, 2201585 (2022); DOI: 10.1002/aenm.202201585.
Sulfur/carbon cathode material chemistry and morphology optimisation for lithium–sulfur batteries, T. Safdar et al., RSC Adv., 14, 30743–30755 (2024); DOI: 10.1039/d4ra04740k.

Kinetics of sulphur dissolution in lithium–sulphur batteries, M. Dent et al., J. Phys. Energy, 4, 024001 (2022); DOI: 10.1088/2515-7655/ac521d.
A step-by-step strategy to realized high-performance lithium-sulfur batteries, M. Dent et al., ACS Appl. Energy Mater., 8, 1492–1506 (2025); DOI: 10.1021/acsaem.4c02457.
Fabrication of ordered structure in sulfur/carbon composite cathode with high areal capacity via acoustic-field patterning for lithium-sulfur batteries, Y. Zhang et al., Energy Technol., 2500743 (2025); DOI: 10.1002/ente.202500743.
Metal-based composite sulfur cathodes for lithium–sulfur electrochemical cells, C.-C. Wu et al., Commun. Mater., 6, 111 (2025); DOI: 10.1038/s43246-025-00835-x.

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