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Gadolinia-doped ceria mixed with alkali carbonates for SOFC applications: II - An electrochemical insight
Chimie ParisTech. (Laboratoire d'Electrochimie, Chimie des Interfaces et Modélisation pour l'Energie)
Chimie ParisTech. (Laboratoire d'Electrochimie, Chimie des Interfaces et Modélisation pour l'Energie)
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Applied Electrochemistry.
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Applied Electrochemistry.ORCID iD: 0000-0002-2268-5042
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2012 (English)In: International journal of hydrogen energy, ISSN 0360-3199, E-ISSN 1879-3487, Vol. 37, no 24, 19371-19379 p.Article in journal (Refereed) Published
Abstract [en]

Composite materials based on gadolinia-doped ceria (GDC) and alkali carbonates (Li2CO3-K2CO3 or Li2CO3-Na2CO3) are potential electrolytes for low temperature solid oxide fuel cell applications (LTSOFC). This paper completes a first one dedicated to the thermal, structural and morphological study of such compounds; it is fully focussed on their electrical/electrochemical properties in different conditions, temperature, composition and gaseous atmosphere (oxidative or reductive). The influence of the gaseous composition on the Arrhenius conductivity plots is evidenced, in particular under hydrogen atmosphere. Finally, electrical conductivity determined by impedance spectroscopy is presented as a function of time to highlight the stability of such composites over 6000 h. First results on single cells showed performance at 600 degrees C of 60 mW cm(-2).

Place, publisher, year, edition, pages
2012. Vol. 37, no 24, 19371-19379 p.
Keyword [en]
SOFC, composite, alkali molten carbonates, gadolinia-doped ceria, conductivity
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-50228DOI: 10.1016/j.ijhydene.2011.10.062ISI: 000313923900087Scopus ID: 2-s2.0-84869747852OAI: oai:DiVA.org:kth-50228DiVA: diva2:461326
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StandUpSwedish Research Council
Note

QC 20130111

Available from: 2011-12-02 Created: 2011-12-02 Last updated: 2017-12-08Bibliographically approved

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Lagergren, Carina

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