| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Process Metallurgy and Electrochemistry of Molten Salts, Liquid Metal Batteries, and Extra-terrestrial Materials Processing: An EPD Symposium in Honor of Don Sadoway
|
| Presentation Title |
Insights into the Oxidation Behavior of Cr1−xFex Anodes for Molten Oxide Electrolysis |
| Author(s) |
Antoine Allanore, Mohsen Esmaily |
| On-Site Speaker (Planned) |
Antoine Allanore |
| Abstract Scope |
Molten oxide electrolysis (MOE) is a possible carbon-free alternative to conventional steelmaking routes. However, MOE’s implementation in the industry has been delayed due to materials challenges in the large-scale production of the oxygen-evolving inert anode. As such, the study herein was aimed to generate new insights into the oxidation and electrochemical properties of Cr1−xFex anodes. The alloys resist the corrosive environment through the formation of a layered oxide scale composed of a continuous (Cr2-xAlx)O3, x ranging from 0.02 to 0.3, layer covered with an outer Mg-rich spinel layer. A survey into the electric properties of the inner oxide indicated that the (Cr2-xAlx)O3 layer acts as an intrinsic semi-conductor at the temperature foreseen. In addition, thermodynamic calculations were found to provide insights into the possible electrolysis-induced formation mechanism of the oxides formed on the Cr1−xFex alloy during electrolysis. The findings presented herein open up promising avenues in developing new metallic-based anodes for MOE. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |