Ce-0.8(SmZr)(0.2)O-2-carbonate nanocomposite electrolyte for solid oxide fuel cell
2014 (English)In: International journal of energy research (Print), ISSN 0363-907X, E-ISSN 1099-114X, Vol. 38, no 4, 524-529 p.Article in journal (Refereed) Published
A nanocomposite Zr/Sm-codoped ceria electrolyte coated with K2CO3/Na2CO3 was synthesized by a coprecipitation method. The electrochemical study of the two-phase nanocomposite electrolytes with carbonate coated on the doped ceria shows high oxygen ion mobility at low temperatures (300-600 degrees C). The interface between the two constituent phases was studied by electrochemical impedance spectroscopy. Ionic conductivities were also measured with electrochemical impedance spectroscopy. The morphology and structure of composite electrolyte were characterized using field-emission scanning electron microscopy and X-ray diffraction. The fuel cell power density is 700 mW cm(-2), and an open-circuit voltage of 1.00 V is achieved at low temperatures (400-550 degrees C). This codoped approach with a second phase provides a good indication regarding overcoming the challenges of solid oxide fuel cell technology.
Place, publisher, year, edition, pages
2014. Vol. 38, no 4, 524-529 p.
composite, zirconia, codoped ceria, morphology
IdentifiersURN: urn:nbn:se:kth:diva-144362DOI: 10.1002/er.3150ISI: 000332989900014ScopusID: 2-s2.0-84897610984OAI: oai:DiVA.org:kth-144362DiVA: diva2:713412
QC 201404232014-04-232014-04-222014-04-23Bibliographically approved