Fabrication Of Thin Electrolyte Layer For Solid Oxide Fuel Cell by Vacuum Slurry Dip-coating Process

진공 슬러리 담금 코팅 공정에 의한 고체 산화물 연료전지용 박막 전해질막 제조에 관한 연구

  • Son, Hui-Jeong (Advanced Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Lim, Tak-Hyoung (Advanced Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Lee, Seung-Bok (Advanced Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Shin, Dong-Tyul (Advanced Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Song, Rak-Hyun (Advanced Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Kim, Sung-Hyun (Department of Chemical and Biological Engineering, Korea University)
  • 손희정 (한국에너지기술연구원 신연료전지연구센터) ;
  • 임탁형 (한국에너지기술연구원 신연료전지연구센터) ;
  • 이승복 (한국에너지기술연구원 신연료전지연구센터) ;
  • 신동열 (한국에너지기술연구원 신연료전지연구센터) ;
  • 송락현 (한국에너지기술연구원 신연료전지연구센터) ;
  • 김성현 (고려대학교 화공생명공학과)
  • Published : 2006.06.15

Abstract

The electrolyte in the solid oxide fuel cell must be dense enough to avoid gas leakage and thin enough to reduce the ohmic resistance. In order to manufacture the thin and dense electrolyte layer, 8 mol% $Y_2O_3$ stabilized-$ZrO_2$ (8YSZ) electrolyte layers were coated on the porous tubular substrate by the novel vacuum slurry dip-coating process. The effects of the slurry concentration, presintering temperature, and vacuum pressure on the thickness and the gas permeability of the coated electrolyte layers have been examined in the vacuum slurry coating process. The vacuum-coated electrolyte layers showed very low gas permeabilities and had thin thicknesses. The single cell with the vacuum-coated electrolyte layer indicated a good performance of $495\;mW/cm^2$, 0.7 V at $700^{\circ}C$. The experimental results show that the vacuum dip-coating process is an effective method to fabricate dense thin film on the porous tubular substrate.

Keywords

Solid Oxide Fuel Cell;Electrolyte;Dip coating;Dense thin film;Yrrria-stabilized zirconia

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