Crack Growth Rate at Oxygen Electrode/Electrolyte Interface in Solid Oxide Electrolysis Cells Predicted by Experiment Coupled Multiphysics Modeling
نویسندگان
چکیده
Solid oxide electrolysis cell (SOEC) is a very efficient hydrogen production technology, but the degradation serious limiting factor for its long-term implementation. Oxygen electrode (OE) delamination reported to be critical mechanism. In this study, we present methodology understand failure of OE due chemical stress in better perspective. Several configurations were tested: baseline strontium-doped lanthanum cobalt iron (LSCF) single layer design and tantalum-doped strontium (SCT) - LSCF bilayer designs with different SCT loadings. An electro-chemo-mechanical model developed associate electrochemical behavior solid mechanics calculating crack growth during long term test. The configuration 20 wt% has performance as it survived life test least length. This study implies that an additional nano-coating over have improved species transport oxygen evolution reduced stress. As operating current density decreases, takes longer time reach same length 6.5 μ m (∼93% electrode/electrolyte interface length). Finally, was concluded plays significant role failure, however may not only source stresses at interface.
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ژورنال
عنوان ژورنال: Journal of The Electrochemical Society
سال: 2023
ISSN: ['0013-4651', '1945-7111']
DOI: https://doi.org/10.1149/1945-7111/acd4f1