About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Ceramics for Clean Hydrogen
|
| Presentation Title |
Mitigating Chromium Poisoning of Air Electrodes in Solid Oxide Cells |
| Author(s) |
Soumendra Basu, Zhikuan Zhu, Michelle Sugimoto, Kaixin Suo, Srikanth Gopalan, Uday Pal |
| On-Site Speaker (Planned) |
Soumendra Basu |
| Abstract Scope |
Ferrite stainless-steel interconnects for solid oxide cells (SOCs) used in fuel cell (SOFC) and electrolyzer (SOEC) modes form Cr2O3 scales at operating temperatures, leading to Cr-poisoning of the air electrodes. In this presentation, two mitigation strategies will be discussed. The first is an in-situ electrochemical cleaning process which removes most of the Cr-containing deposits from the air electrode and restores a significant fraction of the cell performance. The second mitigation technique is the deposition of a protective spinel coating on the stainless-steel surfaces by electrophoretic deposition (EPD). The ability to uniformly coat the surfaces of porous stainless-steel substrates used for metal supported cells by EPD will be discussed. Coating properties, including the ability of the coating to limit thermally grown chromia, electrical conductivity of the spinel, and area specific resistance changes in the coating during the high temperature oxidation exposure, will be discussed. |
