All in One Multifunctional Perovskite Material for Next Generation SOFC
2016 (English)In: Electrochimica Acta, ISSN 0013-4686, E-ISSN 1873-3859, Vol. 193, 225-230 p.Article in journal (Refereed) PublishedText
Multifunctional roles of La0.2Sr0.25Ca0.45TiO3 (LSCT) perovskite material as anode, cathode, and electrolyte for low temperature solid oxide fuel cell (LT-SOFC) are discovered for the first time, and have been investigated via electrochemical impedance spectroscopy (EIS) and fuel cell (FC) measurements. LSCT resistance decreases prominently in FC environment as shown in this study. An improved performance was observed by compositing LSCT with samaria doped ceria (SDC) at 550 degrees C when the FC power density increased from tens of mW cm(-2) for the pure LSCT system up to hundreds of mW cm(-2). The improved conductivity of LSCT-SDC composite is highlighted. The multifunctionality of LSCT as cathode, anode and electrolyte could be attributed to different conducting behavior at high and low oxygen partial pressures and ionic conduction at intermediate oxygen partial pressures. These new discoveries not only indicate great potential for exploring multifunctional perovskites for the next generation SOFC, but also deepen SOFC science and develop new technologies.
Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 193, 225-230 p.
La0.2Sr0.25Ca0.45TiO3 perovskite, Multifunctional material, Proton and oxide ion conduction, Low temperature SOFC, Fuel cell testing
IdentifiersURN: urn:nbn:se:kth:diva-184540DOI: 10.1016/j.electacta.2016.02.061ISI: 000371471900028ScopusID: 2-s2.0-84958793894OAI: oai:DiVA.org:kth-184540DiVA: diva2:917322
FunderSwedish Research Council, 621-2011-4983
QC 201604062016-04-062016-04-012016-04-06Bibliographically approved