Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Fabrication of Thin Solid Oxide Film Fuel Cells

  • Jee, Young-Seok (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Chang, Ik-Whang (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Son, Ji-Won (Center for Energy Materials Research, Korea Institute of Science and Technology) ;
  • Lee, Jong-Ho (Energy Laboratory / Emerging Technology Institute, Samsung Advanced Institute of Technology) ;
  • Kang, Sang-Kyun (Energy Laboratory / Emerging Technology Institute, Samsung Advanced Institute of Technology) ;
  • Cha, Suk-Won (School of Mechanical and Aerospace Engineering, Seoul National University)
  • Published : 2010.01.31
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Abstract

Recently, thin film processes for oxides and metal deposition, such as physical vapor deposition (PVD) and chemical vapor deposition (CVD), have been widely adapted to fabricate solid oxide fuel cells (SOFCs). In this paper, we presented two research area of the use of such techniques. Gadolinium doped ceria (GDC) showed high ionic conductivity and could guarantee operation at low temperature. But the electron conductivity at low oxygen partial pressure and the weak mechanical property have been significant problems. To solve these issues, we coated GDC electrolyte with a nano scale yittria-doped stabilized zirconium (YSZ) layer via atomic layer deposition (ALD). We expected that the thin YSZ layer could have functions of electron blocking and preventing ceria from the reduction atmosphere. Yittria-doped barium zirconium (BYZ) has several orders higher proton conductivity than oxide ion conductor as YSZ and also has relatively high chemical stability. The fabrication processes of BYZ is very sophisticated, especially the synthesis of thin-film BYZ. We discussed the detailed fabrication processes of BYZ as well as the deposition of electrode. This paper discusses possible cell structure and process flow to accommodate such films.

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References

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