| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Materials for Energy Conversion and Storage VI
|
| Presentation Title |
Phase Field Simulation of Ni Coarsening in SOFC Anodes under Operating Conditions |
| Author(s) |
Yinkai Lei, Tianle Cheng, Harry Abernathy, Gregory Hackett, Youhai Wen |
| On-Site Speaker (Planned) |
Yinkai Lei |
| Abstract Scope |
Ni coarsening is an important degradation mechanism in the anodes of Solid Oxide Fuel Cell (SOFC). Besides temperature, the coarsening rate of Ni also depends on operating conditions such as current density and steam content. However, such conditions were not considered in most previous coarsening simulation works. In this work we developed a phase field model capable of simulating Ni coarsening under operation. The effect of current is incorporated by considering generation of steam at the reaction fronts and the diffusion of steam in the pore phase. In the meantime, the reversible reaction between Ni and Ni(OH)2 under humidity atmosphere and the diffusion of Ni(OH)2 is also taken into account. The combined model has been used to simulate the Ni coarsening in synthetic microstructures of Ni-YSZ anodes. The effect of current density and humidity on the Ni coarsening rate is discussed. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |