About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage 2025
|
Presentation Title |
Oxygen Electrodes for Reversible Solid Oxide Cells |
Author(s) |
Ayesha Akter, Jillian R Mulligan, John-In Lee, Soumendra N Basu, Uday B Pal, Srikanth Gopalan |
On-Site Speaker (Planned) |
Srikanth Gopalan |
Abstract Scope |
Solid oxide electrochemical cells operated reversibly between fuel cell and electrolysis modes (rSOCs), have the potential to incorporate and integrate far greater amounts of solar and wind energy into our power grid. In standalone systems, they can also function as distributed generation systems thereby decreasing our reliance on the power grid. In this talk, we present results on rSOCs based on rare earth nickelate – rare-earth doped ceria composite oxygen electrodes that exhibit excellent reversibility when switched cyclically between solid oxide fuel cell (SOFC) and solid oxide electrochemical cell (SOEC) modes of operation. The cyclic operating mode mitigates against cell degradation when compared to operating in single mode operation in electrolysis mode. Further, we have used distribution of relaxation times (DRT) analysis of impedance spectra obtained from single-mode (electrolysis) operated cells, and cells operated in switched-modes, to identify cell gradation mechanisms. |
Proceedings Inclusion? |
Planned: |
Keywords |
Energy Conversion and Storage, High-Temperature Materials, Ceramics |