Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Influences of NiO Precursors on Microstructures and Conductivities of Ni/YSZ Anodes in SOFCs

NiO 전구체가 고체산화물 연료전지 Ni/YSZ 음극의 미세구조와 전기전도도에 미치는 영향

  • Jeong, Youn-Ji (Department of Chemistry, Hanyang University) ;
  • Lee, Hai-Won (Department of Chemistry, Hanyang University) ;
  • Han, Kyoung-R. (Division of Materials Science and Engineering, Korea Institute of Science and Technology) ;
  • Kim, Chang-Sam (Division of Materials Science and Engineering, Korea Institute of Science and Technology)
  • 정윤지 (한양대학교 화학과) ;
  • 이해원 (한양대학교 화학과) ;
  • 임경란 (한국과학기술연구원 재료연구부) ;
  • 김창삼 (한국과학기술연구원 재료연구부)
  • Published : 2006.07.01
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Abstract

NiO/YSZ(70 wt%NiO) composite powders were prepared by ball-milling of 8YSZ and NiO precursors, dried and then followed by calcination. The approach was to combine acidic $Ni(NO_3)_2{\cdot}6H_2O$ and basic $2NiCO_3{\cdot}3Ni(OH)_2{\cdot}4H_2O$ via acid-base reaction as a mixed NiO precursor. Their effects were studied in the aspects of DSC, microstructure, porosity, and electrical conductivity. Ni/YSZ composite of 1N9C (1 mole NiO from the nitrate and 9 moles of NiO from the carbonate) was prepared by consolidation at $1400^{\circ}C$ for 3 h, and then followed by reduction at $1000^{\circ}C$ for 3 h under flowing of 6% $H_2/N_2$. It showed a homogeneous microstructure with ${\sim}20%$ porosity and 1880 S/cm at $1000^{\circ}C$.

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References

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