SDC-LiNa carbonate composite and nanocomposite electrolytes
2010 (English)In: International journal of hydrogen energy, ISSN 0360-3199, Vol. 35, no 7, 2970-2975 p.Article in journal (Refereed) Published
Structural and A.C. impedance analyses were conducted for various ceria-based composite systems. Structural studies showed that the ceria-carbonate composites are two-phase materials, where carbonates were often amorphous. Two phases of ceria and carbonates are mixed at different particle size levels depending on the preparation techniques, especially, employing the NANOCOFC (nanocomposites for advanced fuel cell technology) approach to prepare ceria-LiNaCO3 nanocomposites. General observations from structural analyses are that different preparation techniques resulted in two-phase composite particles in different particle sizes varying from micrometer level to nano-level accompanying also different homogeneity. General observations from impedance analyses are that for the nanocomposites (particle size at nano-scale) more complex grain boundary interface effects are observed compared to that for samples with grains of the micrometer level, but nanocomposites showed enhanced conductivities at the low temperatures. Interfaces and interfacial conduction mechanism can be concluded for such conductivity enhancement.
Place, publisher, year, edition, pages
2010. Vol. 35, no 7, 2970-2975 p.
Intermediate and low temperature solid oxide fuel cell, Samarium doped ceria (SDC), Ceria-based composite electrolytes, Nanocomposites, Interface
IdentifiersURN: urn:nbn:se:kth:diva-29905DOI: 10.1016/j.ijhydene.2009.05.064ISI: 000276692800075ScopusID: 2-s2.0-77951022937OAI: oai:DiVA.org:kth-29905DiVA: diva2:398619
QC 201102182011-02-182011-02-172011-02-18Bibliographically approved