About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Molecular Approaches to Ceramics; Synthesis, Processing, Modeling, and Derived Ceramics
|
| Presentation Title |
Improved Electrochemical Stability of Lithium–Sulfur Batteries Using SiBCN Sulfur Hosts |
| Author(s) |
Arijit Roy, Murilo Machado Amaral, Gurpreet Singh |
| On-Site Speaker (Planned) |
Arijit Roy |
| Abstract Scope |
The performance degradation of lithium–sulfur batteries is mainly caused by the migration of soluble lithium polysulfides during cycling. Therefore, sulfur host materials with high electrical conductivity and strong polysulfide confinement are essential for improving battery stability. Polymer-derived ceramics such as silicon carbonitride provide conductive carbon networks and polar bonding environments that support electron transport and polysulfide adsorption. In this work, a boron-integrated silicon carbonitride (SiBCN) ceramic was synthesized through thermochemical conversion of a single-source precursor and evaluated as a sulfur host. Compared to unmodified silicon carbonitride, the SiBCN host showed improved capacity retention, stable cycling, and high coulombic efficiency. The enhanced performance was attributed to boron–nitrogen bonding environments that strengthened polysulfide adsorption and reduced active material loss. Even under electrolyte-limited and high-rate conditions, the optimized SiBCN host maintained superior electrochemical stability, demonstrating the effectiveness of compositional tuning in polymer-derived ceramics. |