About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Thin Films and Coatings: Properties, Processing and Applications
|
| Presentation Title |
Polysulfide-Regulating SnSe,2@Ti3C2Tx MXene Separator for Practical Lithium–Sulfur Batteries |
| Author(s) |
Amirhossein Mirtaleb, Ruigang Wang |
| On-Site Speaker (Planned) |
Ruigang Wang |
| Abstract Scope |
Lithium-sulfur (Li-S) batteries offer high theoretical energy density but face major challenges including polysulfide shuttling, slow redox kinetics, and capacity degradation under practical conditions. We report a multifunctional separator coated with a SnSe₂@Ti₃C₂Tₓ MXene heterostructure, designed to address these limitations. The SnSe₂ component provides abundant catalytic sites to accelerate polysulfide conversion, while the polar, conductive Ti₃C₂Tₓ matrix immobilizes lithium polysulfides and enhances charge transport. This synergistic interface suppresses the shuttle effect, lowers polarization, and facilitates long-term cycling. At 0.2 C, the cell delivers an initial capacity of 1626 mAh g⁻¹ with >99% Coulombic efficiency. Under high-loading (5 mg cm⁻²) and lean-electrolyte (E/S = 5 µL mg⁻¹) conditions, the cell retains 600 mAh g⁻¹ after 120 cycles. Long-term cycling at 1 C exceeds 1000 cycles with 44.4% capacity retention. These results demonstrate a scalable separator-engineering strategy for high-energy, durable Li-S batteries. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, |