| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Materials for Energy Conversion and Storage VII
|
| Presentation Title |
In-situ Cathode Cleaning for Chromium Poisoning Recovery in Solid Oxide Fuel Cells |
| Author(s) |
Zhikuan Zhu, Michelle Sugimoto, Srikanth Gopalan, Soumendra Basu, Uday Bhanu Pal |
| On-Site Speaker (Planned) |
Uday Bhanu Pal |
| Abstract Scope |
A quick, cost-effective, in-situ method was developed to reverse chromium poisoning in SOFC cathodes. In this method, Cr deposits are removed from the cathode by operating the cells under mild electrolytic conditions. The method is shown to reverse chromium poisoning and recover cell performance. In the present work, cells with LSM cathodes that were degraded by exposure to Cr-containing vapors are cleaned by applying a mild electrolytic bias, as well as increasing the air and fuel humidity. Cell performance improved as a result of cleaning, as evidenced by current-voltage and EIS measurements. SEM and EDS comparisons with a poisoned cell, demonstrate significantly lower amounts of Cr in the cleaned cell. No other microstructural changes in the cathode were observed. Poisoning/cleaning cycle tests were repeated on the same cell to demonstrate feasibility of using this method a number of times during the operating lifetime of the cell. |
| Proceedings Inclusion? |
Planned: |