Nanosize Sulfur Powder (99.9%, 50 nm) for Li-S Battery Cathode, 25-100 g/bottle, CLSBCNSP
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Sulfur powder is a key component as the active material for Lithium-Sulfur (Li-S) battery cathodes due to its high theoretical specific capacity (1,672 mAh/g) while mitigating its strict physical and chemical challenges.
To successfully build a Li-S cell, the cathode fabrication process must overcome three major limitations of elemental sulfur: (1) Extreme Insufficiency in Conductivity: Pure sulfur is an electronic and ionic insulator (10^{-30} S/cm at room temperature). Without a tight network of conductive additives, the charge-transfer kinetics stall. (2) The "Shuttle Effect" of Polysulfides: During discharging, sulfur transitions from elemental S8 to long-chain soluble lithium polysulfides (Li2S8, Li2S6, Li2S4). These species readily dissolve into organic carbonate or ether electrolytes, migrating to the lithium metal anode where they react parasitically. This causes irreversible capacity loss and high internal impedance. (3) Severe Density Modulation (Volume Change): Converting S8 into Li2S induces a large ~80% structural volumetric expansion, which can disintegrate the binder matrix and cause active material delamination from the current collector.
| Part Number |
CLSBCNSP (C-LSB-C-NSP) |
| CAS |
7704-34-9 |
| Molecular Weight |
32.07 |
| Appearance |
Yellow powder (spherical particles) |
| Size Distribution |
~50 nm |
| Specific SurfaceArea (BET) |
20 m2/g |
| Melt Point |
~ 112.8 °C |
| Density |
2.10 g/mL at 25 °C |
| Package Size | 25 g, 50 g, and 100 g/bottle (a larger bottle size also can be supplied upon request) |
Notes: Please try to store the nanosize sulfur powder in a dry place (glovebox is the best option).
References:
- M. Horst, et al. A binder-free dry coating process for high sulfur loading cathodes of Li–S batteries: A proof-of-concept, Journal of Power Sources 2023, 587, 233675
- A. Rosenman, et al. Li-S Cathodes with Extended Cycle Life by Sulfur Encapsulation in Disordered Micro-Porous Carbon Powders, J. Electrochem. Soc., 2014, 161 A657