| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
Twin Perovskie Nanocomposite Cathodes for High-Performance Protonic Ceramic Fuel Cells |
| Author(s) |
Jiawei Zhang, Ashley Gomez, Ryo Kitamura, Minda Zhou, Jianhua Tong |
| On-Site Speaker (Planned) |
Jianhua Tong |
| Abstract Scope |
Protonic ceramic fuel cells (PCFCs) have attracted increasing attention recently because of their efficient low-temperature (LT, 300-600oC) operation. However, the insufficient cathode activity for oxygen reduction reaction (ORR) is still one significant challenge. It has been recognized that triple conductivity (electron, oxygen ion, and proton) are prerequisite property for high-performance PCFC cathodes. However, the single-phase perovskite showed limitations in integrating allow three conductions. Herein, the one-pot Pechini method was utilized to synthesize twin perovskite nanocomposite (TPNC) cathodes comprised of a protonic conducting and mixed ionic and electronic conducting perovskite phases. These TPNC cathodes increased the density of the activated sites/areas for ORR by decreasing grain sizes for each phase and increasing interface concentration. It also provided excellent thermodynamic stability because of the one-pot synthesis process. Several new nanocomposite systems were confirmed to be promising cathodes for LT-PCFCs and showed promising fuel cell performance. |