SSPN Composite Cathode Powder for Lithium-Sulfur Batteries
SSPN Composite Cathode Powder — next-generation Li-S battery cathode combining S90D polymer sulfur and SPAN in a single composite material. Delivers >79 wt% sulfur content, fine D50 ≈ 7.14 μm particles, and ultra-low metal impurities. Engineered for UAV, drone, and eVTOL Li-S batteries targeting 500+ Wh/kg energy density.
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Name: SSPN Composite Cathode (S90D Polymer Sulfur + SPAN)
Material Form: Black powder
Product Code: XN-SSPN
Description:
SSPN is a composite cathode active material formulated from two complementary components: S90D polymer sulfur, which delivers high theoretical capacity through stable polymer-sulfur chains, and SPAN (sulfurized polyacrylonitrile), which provides a covalently bonded carbon-nitrogen framework that anchors sulfur and suppresses polysulfide dissolution. The hybrid architecture achieves >79 wt% sulfur content — significantly higher than conventional SPAN — while retaining the structural integrity needed for stable cycling in lithium-sulfur batteries.
Application:
Cathode active material for high-energy-density lithium-sulfur (Li-S) batteries. Suitable for UAV, drone, and eVTOL battery applications targeting 500+ Wh/kg specific energy, as well as HAPS, defense, aerospace, and Li-S battery R&D in coin, pouch, and prismatic cell formats.
Specifications:
| Property | Specification | Typical Value | Test Method |
|---|---|---|---|
| Appearance | Black powder | Black powder | Visual |
| Sulfur Content | > 50 wt% | > 79% | TGA |
| Moisture | ≤ 1.0 wt% | 0.8% | Karl Fischer |
| Residual Solvents | ≤ 0.5 wt% | 0.4% | GC / TGA |
| Particle Size (D10 / D50) | D10: 2–10 μm; D50: 5–20 μm | D10: 3.43 μm; D50: 7.14 μm | Coulter |
| Volume Mean Diameter D[4,3] | ≤ 25 μm | 8.43 μm | Coulter |
| BET Surface Area (N₂, 77K) | 1–10 m²/g | 3.612 m²/g | BET |
| DSC Thermal Behavior | Information-controlled | Peak: 119.99 °C; ΔH: 23.19 J/g | DSC, 10 °C/min |
Metal Impurities:
| Element | Spec Limit (ppm) | Result (ppm) | Notes |
|---|---|---|---|
| Na | ≤ 100 | 10.64 | — |
| K | ≤ 30 | 1.46 | — |
| Fe | ≤ 300 | 82.39 | — |
| Cu | ≤ 1.0 | ND (< 0.001) | LOD 0.001 ppm |
| Ni | ≤ 1.0 | ND (< 0.005) | LOD 0.005 ppm |
| Zn | ≤ 2.0 | ND (< 0.02) | LOD 0.02 ppm |
| Pb | ≤ 1.0 | ND (< 0.05) | LOD 0.05 ppm |
| Total Metals | ≤ 500 | 94.49 | ND values included |
Values measured by Xnergy. Typical values for reference; not guaranteed unless otherwise specified.
Characteristics:
Higher sulfur loading than standard SPAN
Standard SPAN cathodes contain ~50 wt% sulfur. SSPN composite achieves >79 wt% — a step-change improvement that translates into higher gravimetric capacity at the cathode level.
Hybrid composite architecture
The S90D + SPAN structure preserves the polysulfide-shuttle suppression of covalent SPAN chemistry while unlocking the higher capacity ceiling of polymer sulfur, suitable for aviation-grade Li-S pouch cells targeting 500+ Wh/kg.
Fine, uniform particle distribution
D10 = 3.43 μm, D50 = 7.14 μm, D[4,3] = 8.43 μm. Powder coats uniformly into thin, dense electrodes with consistent batch-to-batch electrochemistry.
Ultra-low metal impurities
Total metals 94.49 ppm against a 500 ppm spec. Cu, Ni, Zn, Pb all below detection limits, preventing parasitic reactions in finished cells.
Packaging & Storage:
Aluminum-laminated, moisture-proof vacuum-sealed bags or HDPE bottles. Sealing performed under dry inert atmosphere when required. Store in a cool, dry, sealed environment away from moisture. Reseal promptly after opening.
Safety:
For research and industrial use only. Avoid inhalation of dust. Wear PPE (masks, gloves, safety goggles). Handle in a dry environment. Refer to SDS for complete safety information.
Note: Values listed above are typical and for reference only. Performance may vary depending on cell architecture, electrolyte selection, and test protocol.
