| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Materials for Energy Conversion and Storage VI
|
| Presentation Title |
Rational Design of Diffusion-blocking Layer to Suppress Chemical Degradation of Solid Oxide Fuel Cells |
| Author(s) |
Kyung Joong Yoon |
| On-Site Speaker (Planned) |
Kyung Joong Yoon |
| Abstract Scope |
Among the various sources of performance degradation of solid oxide fuel cells, the interdiffusion between the cathode and electrolyte has been identified as a predominant factor. Herein, we demonstrate a highly reliable diffusion-blocking layer that effectively suppresses detrimental chemical interactions at elevated temperatures. The diffusion-blocking layer is constructed via a bilayer approach, in which the top and bottom layers perform individual functions to control the bulk and interfacial properties. Harnessing two types of specially designed nanoparticles for each part enables the realization of the desired film structure. Consequently, the formation of insulating phases and decomposition of the cathode are prevented, resulting in a remarkable improvement in performance and stability. The scalability and feasibility of mass production is verified via the fabrication of large cells and a multi-cell stack. The stack in which the bilayer technique is implemented exhibits a low degradation rate of 0.23 %/kh. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |