Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Synthesis and Characterization of LSCF/CGO Composite Cathode for SOFC

SOFC용 LSCF/CGO 공기극의 제조 및 특성연구

  • Park, Jae-Layng (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Lim, Tak-Hyoung (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Lee, Seung-Bok (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Park, Seok-Joo (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Shin, Dong-Ryul (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Han, Kyoo-Seung (Dept. of Fine chemical Engineering and Applied Chemistry, Chungnam National Univ.) ;
  • Song, Rak-Hyun (Fuel Cell Research Center, Korea Institute of Energy Research)
  • 박재량 (한국에너지기술연구원 연료전지연구단) ;
  • 임탁형 (한국에너지기술연구원 연료전지연구단) ;
  • 이승복 (한국에너지기술연구원 연료전지연구단) ;
  • 박석주 (한국에너지기술연구원 연료전지연구단) ;
  • 신동렬 (한국에너지기술연구원 연료전지연구단) ;
  • 한규승 (충남대학교 응용화학과) ;
  • 송락현 (한국에너지기술연구원 연료전지연구단)
  • Published : 2010.02.28
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Abstract

Composites of LSCF($La_{0.6}Sr_{0.4}Co_{0.2}Fe_{0.8}O_{3-\delta}$) and CGO (gadolinium doped ceria)-based ceramics are logical candidate cathode materials with CGO electrolytes. LSCF with perovskite structure was synthesized and investigated by Solid State Reaction (SSR) method used as cathode materials for SOFC (solid oxide fuel cell). The optimized temperature was $1100^{\circ}C$ to synthesize $La_{0.6}Sr_{0.4}Co_{0.2}Fe_{0.8}O_{3-\delta}$ with rhombohedral structure. The polarization resistance of the LSCF/CGO (50:50 wt.%) was smaller than that of other composite cathodes. The analysis of the EIS data of LSCF/CGO suggests that the diffusion and adsorption-desorption of oxygen can be the key process in the cathodic reaction.

Keywords

References

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