Fabrication and characterization of LSCF-GDC/GDC/NiO-GDC microtubular SOFCs prepared by multi-dip coating

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  • USUI Tomohiro
    Department of Crystalline Materials Science, Graduate School of Engineering, Nagoya University
  • ITO Yoichi
    Department of Crystalline Materials Science, Graduate School of Engineering, Nagoya University
  • KIKUTA Koichi
    Department of Crystalline Materials Science, Graduate School of Engineering, Nagoya University

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Microtubular solid oxide fuel cells were fabricated by the multi-dip coating of ceramic aqueous slurries on steel wire. This is a very convenient way to make small straight tubes without requiring special handling. Prepared NiO-GDC/GDC double layered tubes were separated by dissolving the pre-coated polystyrene layer in organic solvent, then were sintered at 1350°C. Then a cathode layer of LSCF-GDC was also formed on the double layered tubes with heat treatment at 1100°C. The prepared microtubular cell performs with a maximum power density of 0.34 W/cm2 at 550°C. Microstructure observation of the tubes suggested the possibility of further improvement in cell quality.

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