Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Synthesis and Characterization of a Ceria Based Composite Electrolyte for Solid Oxide Fuel Cells by an Ultrasonic Spray Pyrolysis Process

초음파분무 열분해법을 이용한 고체산화물 연료전지용 세리아계 복합체 전해질의 제조 및 특성

  • Lee, Young-In (Department of Materials Science and Engineering, Seoul National University of Science and Technology) ;
  • Choa, Yong-Ho (Department of Fusion Chemical Engineering, Hanyang University)
  • 이영인 (서울과학기술대학교 신소재공학과) ;
  • 좌용호 (한양대학교 융합화학공학과)
  • Received : 2014.06.09
  • Accepted : 2014.06.20
  • Published : 2014.06.28
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Abstract

Much research into fuel cells operating at a temperature below $800^{\circ}C$. is being performed. There are significant efforts to replace the yttria-stabilized zirconia electrolyte with a doped ceria electrolyte that has high ionic conductivity even at a lower temperature. Even if the doped ceria electrolyte has high ionic conductivity, it also shows high electronic conductivity in a reducing environment, therefore, when used as a solid electrolyte of a fuel cell, the powergeneration efficiency and mechanical properties of the fuel cell may be degraded. In this study, gadolinium-doped ceria nanopowder with $Al_2O_3$ and $Mn_2O_3$ as a reinforcing and electron trapping agents were synthesized by ultrasonic pyrolysis process. After firing, their microstructure and mechanical and electrical properties were investigated and compared with those of pure gadolinium-doped ceria specimen.

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