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Direct preparation of CE0.8SM0.2O1.9 powders oxidized with H2O2 for low temperature SOFCS application
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology.
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2005 (English)In: Proceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, ASME Press, 2005, 295-298 p.Conference paper, Published paper (Refereed)
Abstract [en]

A novel method was developed to prepare fine doped ceria (DCO) powders directly. Ceria doped with 20 mol. % of samarium (Ce0.8Sm 0.2O1.9, SDC) was prepared by in-situ oxidization of hydroxide precipitates with H2O2 in the solutions. The resultant powder desiccated at 85°C overnight was characterized by X-ray diffraction (XRD), thermogravimetry /differential thermal analysis (TG/DTA), and transmission electron microscopy (TEM). The XRD pattern showed that the as-dried SDC powder is single phase with a cubic fluorite structure like that of pure CeO2. An anodesupported SOFC was also fabricated based on SDC and 20wt % (62mol. %Li2CO3-38 mol. %K2CO 3) composite electrolyte, LiNiO2 as cathode and NiO as anode, by cold pressing. Using hydrogen as the fuel and air as the oxidant, the I-V and I-P characteristics exhibit excellent performances and the maximum power densities are about 696, 469, 377 and 240 mWcm-2 at 650, 600, 550 and 500°C, respectively.

Place, publisher, year, edition, pages
ASME Press, 2005. 295-298 p.
Keyword [en]
Composite electrolyte, H2O2, Low temperature solid oxide fuel cells (LTSOFCs), Oxidization, Samarium doped ceria (SDC)
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-156577ISI: 000243400200041Scopus ID: 2-s2.0-27744487359ISBN: 0791837645 (print)OAI: oai:DiVA.org:kth-156577DiVA: diva2:767227
Conference
3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005, 23 May 2005 through 25 May 2005, Ypsilanti, MI, United States
Note

QC 20141201

Available from: 2014-12-01 Created: 2014-12-01 Last updated: 2014-12-01Bibliographically approved

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CiteExportLink to record
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  • apa
  • harvard1
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