Thermal stability study of SDC/Na2CO3 nanocomposite electrolyte for low temperatur SOFCs
2010 (English)In: International journal of hydrogen energy, ISSN 0360-3199, Vol. 35, no 7, 2580-2585 p.Article in journal (Refereed) Published
The novel core-shell nanostructured SDC/Na2CO3 composite has been demonstrated as a promising electrolyte material for low-temperature SOFCs. However, as a nanostructured material, stability might be doubted under elevated temperature due to their high surface energy. So in order to study the thermal stability of SDC/Na2CO3 nanocomposite, XRD, BET, SEM and TGA characterizations were carried on after annealing samples at various temperatures. Crystallite sizes, BET surface areas, and SEM results indicated that the SDC/Na2CO3 nanocomposite possesses better thermal stability on nanostructure than pure SDC till 700 °C. TGA analysis verified that Na2CO3 phase exists steadily in the SDC/Na2CO3 composite. The performance and durability of SOFCs based on SDC/Na2CO3 electrolyte were also investigated. The cell delivered a maximum power density of 0.78 W cm-2 at 550 °C and a steady output of about 0.62 W cm-2 over 12 h operation. The high performances together with notable thermal stability make the SDC/Na2CO3 nanocomposite as a potential electrolyte material for long-term SOFCs that operate at 500-600 °C.
Place, publisher, year, edition, pages
2010. Vol. 35, no 7, 2580-2585 p.
BET surface area, CeSmO (SDC), Composite electrolytes, Core-shell, Electrolyte material, Elevated temperature, High surface energy, Low temperatures, Maximum power density, Nano-structured, Nanocomposite electrolytes, SEM, Steady output, Thermal stability, Thermal stability studies, XRD
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-11624DOI: 10.1016/j.ijhydene.2009.03.052ISI: 000276692800002ScopusID: 2-s2.0-77951022644OAI: oai:DiVA.org:kth-11624DiVA: diva2:278467
QC 20101019. Uppdaterad från In press till Published (20101019).2009-11-262009-11-262012-05-30Bibliographically approved