Mitigating Electronic Conduction in Ceria-Based Electrolytes via External Structure Design

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dc.contributor.authorRobinson, Ian A.
dc.contributor.authorHuang, Yi-Lin
dc.contributor.authorHorlick, Samuel A.
dc.contributor.authorObenland, Jonathan
dc.contributor.authorRobinson, Nicholas
dc.contributor.authorGritton, J. Evans
dc.contributor.authorHussain, A. Mohammed
dc.contributor.authorWachsman, Eric D.
dc.date.accessioned2024-07-02T17:32:13Z
dc.date.available2024-07-02T17:32:13Z
dc.date.issued2023-12-22
dc.description.abstractDoped ceria electrolytes are the state of the art low-temperature solid oxide electrolytes because of their high ionic conductivity and good material compatibility. However, cerium tends to reduce once exposed to reducing environments, leading to an increase in electronic conduction and a decrease in efficiency. Here, the leakage current is mitigated in ceria-based electrolytes by controlling the defect chemistry through an engineered cathode side microstructure. This functional layer effectively addresses the problematic electronic conduction issue in ceria-based electrolytes without adding significant ohmic resistance and increases the ionic transference to2- number to over 0.93 in a thin 20 µm ceria-based electrolyte at 500 °C, compared to a of to2- 0.8 for an unmodified one. Based on this design, solid oxide fuel cells (SOFCs) are further demonstrated with the remarkable peak power density of 550 mW at 500 °C and excellent stability for over 2000 h. This approach enables a potential breakthrough in the development of ceria-based low-temperature solid oxide electrolytes.
dc.description.urihttps://doi.org/10.1002/adfm.202308123
dc.identifier.citationI. A. Robinson, Y.-L. Huang, S. A. Horlick, J. Obenland, N. Robinson, J. E. Gritton, A. M. Hussain, E. D. Wachsman, Mitigating Electronic Conduction in Ceria-Based Electrolytes via External Structure Design. Adv. Funct. Mater. 2024, 34, 2308123.
dc.identifier.urihttp://hdl.handle.net/1903/33111
dc.language.isoen_US
dc.publisherWiley
dc.relation.isAvailableAtA. James Clark School of Engineeringen_us
dc.relation.isAvailableAtMaterials Science & Engineeringen_us
dc.relation.isAvailableAtDigital Repository at the University of Marylanden_us
dc.relation.isAvailableAtUniversity of Maryland (College Park, MD)en_us
dc.titleMitigating Electronic Conduction in Ceria-Based Electrolytes via External Structure Design
dc.typeArticle
local.equitableAccessSubmissionNo

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