| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Materials for Energy Conversion and Storage VII
|
| Presentation Title |
Compositionally-stabilized Nickelate-Ceria Composite Oxygen Electrodes for Reversible Solid Oxide Fuel Cells and Electrolyzers |
| Author(s) |
Srikanth Gopalan, Jane Banner, Ayesha Aktar |
| On-Site Speaker (Planned) |
Srikanth Gopalan |
| Abstract Scope |
Composite electrodes consisting of a rare-earth nickelate phase and a doped rare-earth ceria phase with a high level of rare-earth doping have been investigated as oxygen electrodes. While rare-earth nickelates have shown great promise as oxygen electrodes, they are known to become unstable in contact with rare-earth doped ceria. Herein, we describe a strategy to eliminate this instability and enable the use of these electrodes as stable high performance oxygen electrodes in both SOFC and SOEC applications. The performance of such composite electrodes is explored using a symmetrical cell approach, and through the electrical conductivity relaxation (ECR) method. The symmetrical cell tests which reveal the stabilized nickelate-ceria electrodes to be superior, are also well-correlated with the results of testing complete cells in both SOFC and SOEC modes. Based on these results we propose deploying these stabilized nickelate-ceria composite electrodes as oxygen electrodes in reversible SOFC-SOEC systems. |
| Proceedings Inclusion? |
Planned: |