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http://dx.doi.org/10.4191/KCERS.2006.43.12.758

Characterization of Ln0.8Sr0.2CoO3-δ (Ln=Gd, Nd, Pr, Sm, or Yb) as Cathode Materials for Low-Temperature SOFCs  

Choi, Jung-Woon (Department of Materials Science and Engineering, University of Seoul)
Kang, Ju-Hyun (Department of Materials Science and Engineering, University of Seoul)
Kim, Han-Ji (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.12, 2006 , pp. 758-763 More about this Journal
Abstract
Perovskites with nominal compositions $Ln_{0.8}Sr_{0.2}CoO_{3-\delta}$ (Ln=Gd, Nd, Pr, Sm, or Yb) were fabricated as cathode materials using a solid-state reaction method for 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 was measured in the temperature range of $600-900^{\circ}C$ in air and fitted with a Solartron ZView program. The crystal structure, microstructure, electrical conductivity, and polarization resistance of $Ln_{0.8}Sr_{0.2}CoO_{3-\delta}$ were characterized systematically.
Keywords
SOFC; Cathode materials; Polarization resistance; Impedance; Porosity;
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