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http://dx.doi.org/10.4191/KCERS.2006.43.3.162

Electrical Properties of the Lanthanum Ferrite-Based Cathode Materials for Low-Temperature SOFCs  

Kang, Ju-Hyun (Department of Materials Science and Engineering, University of Seoul)
Choi, Jung-Woon (Department of Materials Science and Engineering, University of Seoul)
Shim, Han-Byel (Department of Materials Science and Engineering, University of Seoul)
Yoo, Kwang-Soo (Department of Materials Science and Engineering, University of Seoul)
Publication Information
Journal of the Korean Ceramic Society / v.43, no.3, 2006 , pp. 162-168 More about this Journal
Abstract
The perovskites with nominal compositions $La_{0.8}Sr_{0.2}Fe_{1-x}M_xO_3$ (M=Co, Mn, Ni, x=0.1-0.3) were fabricated by a solid-state reaction method as cathode materials of low-temperature operating Solid Oxide Fuel Cells (SOFCs). X-ray diffraction analysis and microstructure observation for the sintered samples were performed. The ac complex impedance were measured in the temperature range $600-900^{\circ}C$ in air and fitted with a Solatron ZView program. The electrical conductivity and polarization resistance of $La_{0.8}Sr_{0.2}Fe_{1-x}M_xO_3$ (M=Co, Mn, Ni, x=0.1-0.3) were characterized systematically. The porosities of the sintered samples were in the range of 25% to 38%. The polarization resistance of $La_{0.8}Sr_{0.2}Fe_{0.7}M_{0.3}O_3$ was $0.291{\Omega}cm^2\;at\;700^{\circ}C$.
Keywords
SOFC; Perovskite; LSF; Polarization resistance; Impedance;
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Times Cited By KSCI : 1  (Citation Analysis)
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