Electrochemical Characterization on SDC/Na2CO3 Nanocomposite Electrolyte for Low Temperature Solid Oxide Fuel Cells
2011 (English)In: Journal of Nanoscience and Nanotechnology, ISSN 1533-4880, Vol. 11, no 6, 5413-5417 p.Article in journal (Refereed) Published
Our previous work has demonstrated that novel core-shell SDC/Na2CO3 nanocomposite electrolyte possesses great potential for the development of low temperature (300-600 degrees C) solid oxide fuel cells. This work further characterizes the nanocomposite SDC/Na2CO3 electrochemical properties and conduction mechanism. The microstructure of the nanocomposite sintered at different temperatures was analyzed through scanning electron microscope (SEM) and X-ray diffraction (XRD). The electrical and electrochemical properties were studied. Significant conductivity enhancement was observed in the H-2 atmosphere compared with that of air atmosphere. The ratiocination of proton conduction rather than electronic conduction has been proposed consequently based on the observation of fuel cell performance. The fuel cell performance with peak power density of 375 mW cm(-2) at 550 degrees C has been achieved. A.C. impedance for the fuel cell under open circuit voltage (OCV) conditions illustrates the electrode polarization process is predominant in rate determination.
Place, publisher, year, edition, pages
2011. Vol. 11, no 6, 5413-5417 p.
Low Temperature Solid Oxide Fuel Cells, Nanocomposite, Proton Conduction, A. C. Impedance, Conductivity
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-35613DOI: 10.1166/jnn.2011.3777ISI: 000291568100109ScopusID: 2-s2.0-84861157713OAI: oai:DiVA.org:kth-35613DiVA: diva2:429654
QC 20110705 3rd International Meeting on Developments in Materials, Processes and Applications of Emerging Technologies (MPA-2009), Manchester, ENGLAND, 20092011-07-052011-07-042011-07-05Bibliographically approved