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Scaled up low-temperature SOFCs with symmetrical electrode for applications
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.
2015 (English)In: Journal of Solid State Electrochemistry, ISSN 1432-8488, E-ISSN 1433-0768, Vol. 19, no 8, 2361-2368 p.Article in journal (Refereed) Published
Abstract [en]

In this study, a new type of the Mg0.4Zn0.6O/Ce0.8Sm0.2O2-delta (MZSDC) composite electrolyte was synthesized using a co-precipitation method. Large-sized engineering cells have been fabricated and tested to meet the demands of applications. X-ray diffraction scanning electron microscopy and X-ray photoelectron spectroscopy have been employed to characterize the microstructure and the morphology of the synthesized samples. MZSDC is a composite system. X-ray electron spectroscopy shows that Ce (3d) binding energy shifted from high to low and the ratio of Ce3+ decreased in comparison to pure CeO2, due to the doping effect. The doping and composite caused the material to have an excellent electrical property, 0.089 S center dot cm(-1), and device performance, with a maximum power of 16.4 W (648 mW center dot cm(-2)) achieved at 600 A degrees C for a larger-sized (6 cm x 6 cm x 1 mm) fuel cell. The open circuit voltage and power of the fuel cell only slightly degrades (less than 1 %) after continually tested for 100 h. This is the first report regarding the large size engineering cell performance for using this new composite electrolyte with both excellent performance and low cost.

Place, publisher, year, edition, pages
2015. Vol. 19, no 8, 2361-2368 p.
Keyword [en]
Solid oxide fuel cells, Samarium doped ceria, Composite electrolyte, Large size, Engineering cell, Symmetrical electrode
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-172702DOI: 10.1007/s10008-015-2871-2ISI: 000358546700018Scopus ID: 2-s2.0-84938949176OAI: oai:DiVA.org:kth-172702DiVA: diva2:850059
Note

QC 20150831

Available from: 2015-08-31 Created: 2015-08-27 Last updated: 2017-12-04Bibliographically approved

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