About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage VI
|
Presentation Title |
Reversal of Chromium Poisoning in Solid Oxide Fuel Cell Cathodes |
Author(s) |
Michelle Sugimoto, Zhikuan Zhu, Srikanth Gopalan, Soumendra Basu, Uday Bhanu Pal |
On-Site Speaker (Planned) |
Uday Bhanu Pal |
Abstract Scope |
The goal of this work is to clean solid oxide fuel cell cathodes free of chromium-containing deposits and reverse the effects of chromium poisoning. The cell cathodes were intentionally poisoned at 800°C with chromium-containing oxide deposits by operating the cell in the presence of humidity under galvanostatic conditions. After poisoning, the cells were electrochemically cleaned by imposing an electrolytic bias of 50 to 100 mV with air containing 5-15% water vapor and the fuel (H2) containing 20-40% water vapor between 800-900°C. I-V and electrochemical impedance spectroscopy results showed improvement in cell performance and lower concentrations of the chromium deposit after cleaning. The chemical nature of the chromium deposits before and after cleaning were also analyzed using various techniques. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |