Ossila Sulfur-Carbon Composite Powder (M2554A1) is a cathode active material for lithium-sulfur (Li–S) batteries. It is a black powder containing 69 ± 1% sulfur and 30 ± 1% carbon by TGA, with a purity above 99.45%. Li–S chemistry is attractive because of its very high theoretical energy density of 2600 Wh/kg and specific capacity of 1672 mAh/g.
The composite is made by grinding sulfur with carbon powder and then melt-diffusing the mixture at 155°C for 12 hours. In the finished material the carbon serves as the host, supplying a conductive surface and pathways for ions and electrons, which matters most when sulfur loading is high and electrodes are thick. The structure also improves electrolyte penetration, so lithium ions can react quickly with the sulfur.
Sulfur-carbon composites with sulfur contents between 40-70% have been reported to reach discharge capacities of 500-900 mAh/g, retaining 50-70% of capacity over 50-150 cycles. The powder is sieved to 80 mesh and is supplied in 5 g, 10 g and 25 g packs.
- Preparing cathodes for lithium-sulfur (Li–S) battery research.
- Studying high sulfur loading and thick electrode designs for Li–S cells.
- Battery R&D aimed at high energy density storage for electric vehicles.
- Research into battery materials for grid energy storage.
| Brand | Ossila |
|---|---|
| CAS number | 7440-44-0 (carbon), 7704-34-9 (sulfur) |
| Molecular formula | C(S) |
| Purity | >99.45% (TGA) |
| Category | — |
| Pack sizes | 5 g, 10 g, 25 g |
| Physical form | Black powder |
| Storage | — |
- Product code: M2554A1
- 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: Battery materials, Cathode active materials, Lithium sulfur material
- Sulfur Content: 69 ± 1% (TGA)
- Carbon Content: 30 ± 1% (TGA)
- Particle Size: 80 meshes (sieving method)
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