Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Comparison of Microstructure and Electrical Conductivity of Ni/YSZ and Cu/YSZ Cathode for High Temperature Electrolysis

고온수전해용 Ni/YSZ와 Cu/YSZ 환원극의 미세구조 및 전기전도도 비교

  • Kim, Jong-Min (Plant Engineering Center, Institute for Advanced Engineering) ;
  • Shin, Seock-Jae (CNL Energy) ;
  • Woo, Sang-Kook (Energy Materials Research Center, Korea Institute of Energy Research) ;
  • Kang, Kae-Myung (Department of Materials Engineering, Seoul National University of Technology) ;
  • Hong, Hyun-Seon (Plant Engineering Center, Institute for Advanced Engineering)
  • 김종민 (고등기술연구원 플랜트엔지니어링센터) ;
  • 신석재 ((주)CNL Energy) ;
  • 우상국 (한국에너지기술연구원 융복합에너지재료연구센터) ;
  • 강계명 (서울산업대학교 신소재공학과) ;
  • 홍현선 (고등기술연구원 플랜트엔지니어링센터)
  • Published : 2008.07.27
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Abstract

Hydrogen production via high high-temperature steam electrolysis consumes less electrical energy than compared to conventional low low-temperature water electrolysis, mainly due to the improved thermodynamics and kinetics at elevated temperaturetemperatures. The elementalElemental powders of Cu, Ni, and YSZ are were used to synthesize high high-temperature electrolysis cathodecathodes, of Ni/YSZ and Cu/YSZ composites, by mechanical alloying. The metallic particles of the composites were uniformly covered with finer YSZ particles. Sub-micron sized pores are were homogeneously dispersed in the Ni/YSZ and Cu/YSZ composites. In this study, The cathode materials were synthesized and their Characterizations properties were evaluated in this study: It was found that the better electric conductivity of the Cu/YSZ composite was measured improved compared tothan that of the Ni/YSZ composite. Slight A slight increase in the resistance can be produced for in a Cu/YSZ cathode by oxidation, but it this is compensated offset for by a favorable thermal expansion coefficient. Therefore, Cu/YSZ cermet can be adequately used as a suitable cathode material of in high high-temperature electrolysis.

Keywords

References

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