2018/10/21 by Yanhao Dong, Dong, Yanhao, I‐Wei Chen +1
Engineering · Materials Science · #Advancements in Solid Oxide Fuel Cells #Chemical Looping and Thermochemical Processes #FOS: Physical sciences #Fuel Cells and Related Materials #Materials Science (cond-mat.mtrl-sci)
paper · pdf · doi:10.48550/arxiv.1810.09016
openalex publication_date 2018/10/21 · openalex created_date 2018/10/26 · openalex updated_date 2026/07/28
Solid oxide fuel/electrolyzer cell (SOFC/SOEC) converts energy between chemical and electrical forms inversely. Yet electrolyte degradation takes place much more severe for SOEC than SOFC during long-term operations. By solving transport equations, we found very large oxygen potential gradients and sharp oxygen potential transitions at grain boundaries of polycrystalline SOFC/SOEC electrolyte. Surprisingly, an inversion of oxygen potential transitions was identified, suggesting a fundamentally different transport mechanism for minor electronic charge carriers. Such findings could be critical to understand and eliminate SOFC/SOEC degradations in practical applications.