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Synthesis and characterization of composite electrolytes based on samaria-doped ceria and Na/Li carbonates
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
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2010 (English)In: International journal of hydrogen energy, ISSN 0360-3199, E-ISSN 1879-3487, Vol. 35, no 7, 2953-2957 p.Article in journal (Refereed) Published
Abstract [en]

Samaria-doped ceria-based composites with a 2:1 addition of Li and Na carbonates (or simple Na carbonate as admixture) were prepared mixing nanosized powders of the ceramic phase with the remaining constituents. Samples fired at relatively low temperatures (below 700 degrees C) were characterized by X-ray diffraction, scanning electron microscopy combined with energy dispersive spectroscopy and impedance spectroscopy in air. These composites showed a complex but homogeneous distribution of both phases, with one ceramic skeleton of bonded nanosized grains surrounded by the carbonate-based phase. Impedance spectroscopy data was used to confirm the impressive electrical conductivity of these materials, but also to put into evidence the complex nature of the charge transport process, clearly deviating from classical electrolytes.

Place, publisher, year, edition, pages
2010. Vol. 35, no 7, 2953-2957 p.
Keyword [en]
Composite electrolytes, Samaria-doped ceria, Alkali carbonates, Nanosized ceria, Microstructural characterization, Impedance spectroscopy
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-29904DOI: 10.1016/j.ijhydene.2009.05.036ISI: 000276692800072Scopus ID: 2-s2.0-77950339817OAI: oai:DiVA.org:kth-29904DiVA: diva2:398660
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QC 20110218

Available from: 2011-02-18 Created: 2011-02-17 Last updated: 2017-12-11Bibliographically approved

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