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Electrochemical properties of LaCePr-oxide/K2WO4 composite electrolyte for low-temperature SOFCs
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.ORCID iD: 0000-0002-3133-7031
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2017 (English)In: Electrochemistry communications, ISSN 1388-2481, E-ISSN 1873-1902, Vol. 77, 44-48 p.Article in journal (Refereed) Published
Abstract [en]

In this study, we introduced tungstate into solid oxide fuel cells (SOFCs) for the first time by using a La/Pr-doped CeO2 (LCP)/K2WO4 composite as the electrolyte, which exhibited remarkably enhanced grain boundary conduction compared to that of single-phase LCP. The composition dependence of the electrical conductivity was investigated. As a result, the composite with 10 wt% K2WO4 was proven to be the optimum ratio, revealing a significantly higher ionic conductivity than LCP, along with a negligible electronic conductivity. The fuel cell using the LCP/K2WO4 electrolyte displayed an encouraging performance of 500 mW cm(-2) at 550 degrees C. These findings indicate that the LCP/K2WO4 composite is a promising electrolyte for low-temperature SOFCs.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE INC , 2017. Vol. 77, 44-48 p.
Keyword [en]
Composite electrolyte, Solid oxide fuel cells, Electrical property, LaCePr-oxide, K2WO4
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-206690DOI: 10.1016/j.elecom.2016.12.013ISI: 000399510400011ScopusID: 2-s2.0-85013435367OAI: oai:DiVA.org:kth-206690DiVA: diva2:1094068
Note

QC 20170509

Available from: 2017-05-09 Created: 2017-05-09 Last updated: 2017-05-09Bibliographically approved

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