|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||High-Temperature Systems for Energy Conversion and Storage
||Understanding the Mechanisms of Electrode Degradation in Solid Oxide Fuel Cells by Phase-field Modeling
||Jiamian Hu, Liang Hong, Linyun Liang, Kirk Gerdes, Long-Qing Chen
|On-Site Speaker (Planned)
Phase-field method has recently emerged as a powerful computational tool for understanding the mechanisms of electrode degradation in solid oxide fuel cells (SOFCs). We are developing a set of computational models that can be used to predict time-dependent changes in both the electrode microstructure (grains/phases) and the ionic transport across/along the interfaces (grain/interphase boundaries) in SOFCs. In this talk, we report our recent progress in 1) simulating the particle coarsening and grain growth (both in three-dimensions) in a typical three-phase or infiltrated cathode; 2) predicting the concentration profiles of multiple cations, oxygen vacancies, and electrons across the electrolyte-electrode interface with or without loading currents. All simulations results obtained agree well with existing experiments and therefore may provide some guidance for improving the durability of SOFCs.
||Planned: A print-only volume