한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제43권3호
  • /
  • Pages.162-168
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  • 2006
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  • 1229-7801(pISSN)
  • /
  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
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저온 작동형 SOFC Lanthanum Ferrite계 공기극 소재의 전기적 특성

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

  • 강주현 (서울시립대학교 신소재공학과) ;
  • 최정운 (서울시립대학교 신소재공학과) ;
  • 심한별 (서울시립대학교 신소재공학과) ;
  • 유광수 (서울시립대학교 신소재공학과)
  • 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)
  • 발행 : 2006.03.01
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초록

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 $0.291{\Omega}cm^2\;at\;700^{\circ}C$.

키워드

참고문헌

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