A phase field study on the microstructure evolution in the Ni-YSZ electrode of SOC under operating condition: comparison between Ni(OH)2 diffusion and Ni-YSZ wettability change
Presented by LRST at PRiME 2020, 10/4
Lei, Yinkai↗
Engineering topics
Lei, Yinkai
Publications and source records attributed to Lei, Yinkai.
Phase field simulation of anode microstructure evolution of solid oxide fuel cell through Ni(OH) 2 diffusion
Microstructure evolution in a solid oxide fuel cell anode is strongly affected by operating condition. The detailed mesoscale evolution mechanism under operating condition is still under debate. Here we develop a phase-field model to simulate microstructure evolution through formation and diffusion of gaseous Ni(OH)2. We studied the coarsening kinetics and redistribution of Ni under different steam distributions and compare it to that under pure hydrogen condition. Overall, the results suggest that although the presence of a steady gradient of steam leads to redistribution of Ni, Ni(OH) 2 formation and diffusion do not significantly change the Ni coarsening rate under strictly humid conditions, contrary to commonly reported hypotheses. It is concluded that competing mechanisms other than Ni(OH) 2 diffusion must be responsible for the experimentally observed Ni redistribution and enhanced coarsening under humid conditions.
25 ENERGY STORAGE↗
Molecular dynamic simulations on the mechanical properties of CoCrFeMnNi high entropy alloy and the equimolar alloys in its sub-system
Presented by NETL at World Congress on High Entropy Alloys (HEA 2019), 11/19
Lei, Yinkai↗
Phase Field Simulation of Ni Coarsening in the Porous Anode of Solid Oxide Fuel Cell
Presented by NETL at MS&T 2019, 09/19
Lei, Yinkai↗
Investigating SOFC Electrode Microstructures and Performance Degradation: A High Throughput Integrated Model
Presented by NETL at MS&T 2019, 09/19
Epting, William K.↗