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Multiscale modeling of degradation of full solid oxide fuel cell stacks

Authors :
Xing-Yuan Miao
Omid Babaie Rizvandi
Henrik Lund Frandsen
Source :
Rizvandi, O B, Miao, X-Y & Frandsen, H L 2021, ' Multiscale Modeling of Degradation of Full Solid Oxide Fuel Cell Stacks ', International Journal of Hydrogen Energy, vol. 46, no. 54, pp. 27709-27730 . https://doi.org/10.1016/j.ijhydene.2021.05.204
Publication Year :
2021
Publisher :
Elsevier BV, 2021.

Abstract

Limiting the degradation of solid oxide fuel cells is an important challenge for their widespread use and commercialization. The computational expense of long-term simulation of a full stack with conventional models is immense. In this study, we present a multiscale three-dimensional model of a degrading full stack of solid oxide cells, where we integrate degradation phenomena of nickel particle coarsening in the anode electrode, chromium poisoning of the cathode electrode, and oxidation of the interconnect into a multiscale model of the stack. This approach makes this type of simulation computationally feasible, and 38 thousand hours of the stack operation can be simulated in 1 h and 15 min on a high-end workstation. Hereby one can start to explore the optimum operating conditions for a range of parameters. The model is validated with experimental data from an 18-cell Julich Mark-F stack experiment and predicts common trends reported in the literature for evolutions of the stack performance, degradation phenomena, and the related model variables. Moreover, it captures how different regimes in the full stack degrades at different rates and how the various degradation phenomena interact over time. The model is used to investigate the effects of galvanostatic and potentiostatic operation modes, operating conditions, and flow configurations on the long-term performance of the stack. Results demonstrate, as expected, that potentiostatic operation mode, moderate temperature, lower load current, and counter-flow configuration improve the long-term performance of the stack.

Details

ISSN :
03603199
Volume :
46
Database :
OpenAIRE
Journal :
International Journal of Hydrogen Energy
Accession number :
edsair.doi.dedup.....3eb97dd94238c18e10d9fbb5be94136e
Full Text :
https://doi.org/10.1016/j.ijhydene.2021.05.204