About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage 2025
|
Presentation Title |
The Performance of Sr2-xVMoO6-δ in SOFC Application: Evaluating MIEC Fuel Electrodes for Enhanced Stability, Conductivity, and Electrocatalysis |
Author(s) |
Stephen Kevin Heywood, Julia A. Esakoff, David R. Driscoll, Stephen W. Sofie |
On-Site Speaker (Planned) |
Stephen Kevin Heywood |
Abstract Scope |
Mixed Ionic and Electronic Conductors (MIECs) are effective in air electrodes for Solid Oxide Fuel Cells (SOFC) and Electrolysis Cells but show limited success as fuel electrodes. MIECs, however, can eliminate triple-phase boundaries and enhance electroactive surfaces while resisting sulfur and carbon poisoning. Complex double perovskites, like Sr2-xVMoO6-δ are of particular interest for their optical, electrical, and magnetic properties. SVMO is notable for its exceptional electronic conductivity and low-temperature oxygen ion conduction, transitioning from semiconducting to metallic behavior above 800°C. Electrolyte-supported SOFCs were fabricated via aerosol spraying, using SVMO as the fuel electrode and LSM/YSZ as the air electrode, with buffering mediums to prevent unfavorable reactions. This study utilized Raman spectroscopy to assess SVMO performance during and after operation, and SEM/EDS to evaluate chemical stability and morphology. Intrinsic SVMO electronic and ionic conductivity trends based on stoichiometry, examining lattice charge neutrality and phase behavior through advanced characterization, will be reported. |
Proceedings Inclusion? |
Planned: |
Keywords |
Electronic Materials, Ceramics, Energy Conversion and Storage |