Polymeric Sulfur/Sulfurized Polyacrylonitrile Composite (SSPN) Powder for Li-S Battery Cathode, 20-100 g/bottle, CLSBCSSPN
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Sulfurized Polyacrylonitrile (SPAN) has long been a premier solution to these issues because it chemically binds sulfur to a conductive, conjugated carbon framework. However, SPAN typically maxes out at a sulfur content of roughly 40–50 wt%. To push the energy density boundary further, researchers developed Polymeric Sulfur/Sulfurized Polyacrylonitrile Composites (SSPN). This strategy incorporates structural polymeric sulfur stabilized inside or hybridized with a highly sulfurized PAN matrix, combining high sulfur loading with the exceptional cycling stability of chemically bound sulfur.
In an SSPN composite, the synthesis parameters (such as altered S:PAN precursor ratios, lower-temperature stabilization zones, or mechanical shearing) are tuned to induce the formation of polymeric sulfur. Polymeric sulfur consists of long, linear catenated sulfur chains rather than isolated, cyclical S8 rings. When hybridized with the dehydrogenated PAN network, these long polymeric chains are sterically confined and physically/chemically stabilized by the surrounding highly sulfurized heterocyclic ladder polymers.
| Part Number |
CLSBCSSPN (C-LSB-C-SSPN) |
| Chemical Formula/Structure |
Polymeric Sulfur
 SPAN
|
Species Composition |
Polymeric sulfur (S90D) : SPAN = 3:1
|
| Appearance |
Black powder |
| Size Distribution |
D10: 3.43 um D50: 7.14 um D90: 12.4 um |
| Impurities |
Na: ~10.64 ppm K: ~1.46 ppm Fe: ~82.39 ppm |
| Surface Area (BET) |
~3.61 m2/g |
| Specific Capacity |
~640 mAh/g |
| Columbic Efficiency (Frist Cycle) |
95.0% |
| Cycling Stability |
>100 cycles |
| Package Size | 20 g, 50 g, and 100 g/bottle (a larger bottle size also can be supplied upon request) |
Notes: Please try to store the SSPN powder in a dry place (glovebox is the best option).
References:
- S. Wei, et al. Metal–Sulfur Battery Cathodes Based on PAN–Sulfur Composites, J. Am. Chem. Soc. 2015, 137, 37, 12143–12152
- J. Fanous, et al. Structure-Related Electrochemistry of Sulfur-Poly(acrylonitrile) Composite Cathode Materials for Rechargeable Lithium Batteries, Chem. Mater. 2011, 23, 22, 5024–5028