| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Materials for Energy Conversion and Storage 2025
|
| Presentation Title |
Surface Treatment using Sulfur for Stabilized Cathode/Sulfide Electrolyte Interface |
| Author(s) |
Ha Young Ko, Yong Joon Park |
| On-Site Speaker (Planned) |
Ha Young Ko |
| Abstract Scope |
Given the safety concerns surrounding lithium-ion batteries, interest in all-solid-state batteries is rapidly growing. Sulfide-based solid electrolytes are on the brink of commercialization due to their high ionic conductivity and excellent formability. However, their narrow electrochemical stability window leads to undesirable side reactions at the cathode interface. Lithium niobate coatings for the cathode surface are typically applied to mitigate these reactions. Nevertheless, the low chemical compatibility between the oxide-based lithium niobate and the sulfide-based electrolytes hampers the effectiveness of these coatings in fully controlling side reactions. To address this issue, we propose an innovative approach involving sulfur treatment on the lithium niobate coating layer. Sulfur-modified lithium niobate is anticipated to enhance the electrochemical properties by improving chemical compatibility with electrolytes, thereby providing superior control over interfacial side reactions. Our findings indicate that sulfur treatment improves rate performance, long-term cycling stability, and the overall effectiveness of side reaction control. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, Surface Modification and Coatings, Electronic Materials |