About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Ceramics for Clean Hydrogen
|
| Presentation Title |
Advancing Intermediate-Temperature Proton-Conducting Solid Oxide Electrolysis Cells: Mechanistic Insights and Material Optimization |
| Author(s) |
Wenyuan Li, Xuemei Li, Bo Guan, Xingbo Liu |
| On-Site Speaker (Planned) |
Wenyuan Li |
| Abstract Scope |
We focused on understanding proton-conducting solid oxide electrolysis cells (PCECs) by investigating key anode and electrolyte materials for intermediate-temperature applications. We identified Pr₂NiO₄+δ (PNO) as a promising anode material due to its excellent chemical compatibility and catalytic activity for water splitting, achieving high current density and low polarization resistance. Combining BaZr₀.₁Ce₀.₇Y₀.₁Yb₀.₁O₃−δ (BZCYYb) with La₂Ce₂O₇ (LCO) in a bilayer electrolyte demonstrated enhanced stability and performance under high steam conditions. Mechanistic insights revealed the critical role of proton conductivity in maintaining active surface areas, while oxygen conductivity was less significant for water-splitting reactions. Ba substitution in PNO further improved proton conductivity, leading to outstanding performance metrics. Nanocomposite anodes are being investigated to achieve low-temperature operation of SOECs with high performance and reliability. |