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Optimum Reduction Condition of SDC-NiO Composite Anode for SDC-based Single Chamber Solid Oxide Fuel Cells

SDC계 단실형 고체산화물 연료전지용 SDC-NiO 복합음극의 최적 환원 조건

  • Min, Ji-Hyun (Department of Materials Science & Engineering, Yonsei University) ;
  • Ahn, Sung-Jin (Department of Materials Science & Engineering, Yonsei University) ;
  • Moon, Joo-Ho (Department of Materials Science & Engineering, Yonsei University) ;
  • Kim, Joo-Sun (Center for Energy Materials Research, KIST)
  • 민지현 (연세대학교 세라믹 공학과) ;
  • 안성진 (연세대학교 세라믹 공학과) ;
  • 문주호 (연세대학교 세라믹 공학과) ;
  • 김주선 (한국과학기술연구원 에너지재료연구단)
  • Published : 2007.10.31

Abstract

We have determined an optimal reduction condition for NiO-based anode in single chamber solid oxide fuel cells that involve samaria-doped ceria (SDC) as an electrolyte. Optimal condition should not only induce sufficient reduction of NiO to Ni, but also prevent the reduction of SDC electrolyte in order to achieve high open circuit voltage (OCV) and power output. Thermodynamic consideration allowed us to determine the optimal anode reduction condition as $96%H_2-4%H_2O$ atmosphere at $250^{\circ}C$. This finding was in a good agreement with the experimental verifications by monitoring the conductivities of SDC and NiO under different reducing conditions.

Keywords

References

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