Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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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)
  • Published : 2006.12.31
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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.

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References

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