| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Materials for Energy Conversion and Storage 2025
|
| Presentation Title |
Unraveling the conundrum of electronic leakage in protonic ceramic cells: Operation-specific insights and rational design strategies |
| Author(s) |
Bo Guan, Hanchen Tian, Yoosuf Picard, Jian Liu, Harry Abernathy, Thomas Kalapos, Lingfeng Zhou, Xuemei Li, Wenyuan Li, Xingbo Liu |
| On-Site Speaker (Planned) |
Xingbo Liu |
| Abstract Scope |
In this study, we explore the electron and ion mixed transport properties of four common protonic ceramics. BZCYYb1711 exhibits the highest ionic conductivity, but 2-3 times higher electronic leakage when exposed to oxygen-containing environments than the others. BZY82 exhibits ~2 times higher electronic leakage in hydrogen-containing environment. BZCY721 demonstrates excellent ion transport numbers across these four operating conditions. The most challenging operating environment for all candidates is the air side of fuel cell mode, which leads to a high initial electronic leakage, followed by a significant increase with polarization. The probable cause for this behavior is a H2-free, polarization-induced reduction that leads to the formation of . The electron small polaron associated with is released by the electrical field due to the Poole-Frenkel effect. ZnO and NiO sintering aids are found to be detrimental to the ionic conductivity of the electrolytes. In particular, NiO substantially lowers the ion transport number. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, Energy Conversion and Storage, Other |