About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Advances in Materials and Systems for a Hydrogen Economy
|
| Presentation Title |
Advanced Materials for Low-Temperature Oxygen-Ion Conducting Solid Oxide Electrolysis Cell for Hydrogen Production |
| Author(s) |
Zhijun Liu, Benjamin B. Peterson, Micah Midgett, Xuefei Zhang, Weining Wang, Kaiwen Wang, Nicholas E. Stanislowski, Meilin Liu, Jiahong Zhu, Zhien Liu |
| On-Site Speaker (Planned) |
Zhien Liu |
| Abstract Scope |
The state-of-the-art solid oxide electrolysis cell (SOEC) requires operation at high temperatures (HT) because of significantly increased resistance of stabilized zirconia electrolyte at lower temperatures (LT). The challenges are 1) higher SOEC degradation initiated by thermally activated material diffusion, migration, and interaction, especially under high current density and steam concentrations; and 2) expensive HT alloy as interconnect. The team is developing a novel LT-SOEC technology based on co-doped ceria and an electron blocking layer (EBL) formed in situ at the interface of electrolyte and H-electrode during co-firing. The thickness and resistance of the EBL can be optimized via H-electrode composition and SOEC firing parameters to block electronic current while maintaining high performance. To enable LT operation, advanced O-electrode material, low-cost and domestically available ferritic stainless steel, and sealing materials are also being developed and evaluated for SOEC stack. Low-cost ceramic processing technologies are being utilized for SOEC fabrication. |