|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advanced Materials for Energy Conversion and Storage 2022
||Simulating Microstructure Evolution in Ni-YSZ Electrodes of Solid Oxide Cells under Operating Conditions
||Yinkai Lei, William Epting, Jerry Hunter Mason, Tianle Cheng, Harry Abernathy, Gregory Hackett, Youhai Wen
|On-Site Speaker (Planned)
A model for simulating microstructure evolution in Ni-YSZ electrodes of solid oxide cells under fuel cell, electrolysis and reversible mode has been developed by coupling our recently developed phase field model, multiphysics model and microstructure analyzing tools. The mechanisms of Ni(OH)2 diffusion and Ni-YSZ wettability change have been considered. The model has been used to investigate the effect of temperature, current density, and gas compositions on the degradation of Ni-YSZ electrode. Both Ni coarsening and redistribution are found to be affected by gas composition and temperature, while current density only affects the Ni redistribution. The results are compared to available experiments. It shows both mechanisms cannot fully explain the Ni redistribution observed in the experiment.
||Modeling and Simulation, Energy Conversion and Storage, Other