Journal of the Korean Electrochemical Society (전기화학회지)

The Korean Electrochemical Society (한국전기화학회)
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Characterization of (Co/Nb)-coated NiO as a Cathode Material for Molten Carbonate Fuel Cells

코발트와 나이오븀이 코팅된 NiO 용융탄산염 연료전지 양극물질 특성 연구

  • 최희선 (고려대학교 이과대학 화학과) ;
  • 이철우 (성신여자대학교 자연과학대학 화학과) ;
  • 김건 (고려대학교 이과대학 화학과)
  • Received : 2010.07.30
  • Accepted : 2010.08.30
  • Published : 2010.08.28
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Abstract

NiO is commonly used as the cathode for the molten carbonate fuel cell due to its stability and high electrical conductivity in molten carbonates and oxygen atmosphere. However, long-term operation of MCFC has a serious problem which is the degradation of cathode material, the so-called Ni dissolution. In the present study, we have attempted to synthesize a new alternative cathode material as Co/Nb-coated NiO cathode. The results obtained in this study suggest that the Co/Nb-coated NiO cathode can be utilized as having lower dissolution and higher cell performance than those of the pure NiO cathode.

용융탄산염 연료전지(MCFC)의 양극으로 사용되는 NiO는 $650^{\circ}C$의 용융탄산염과 산소 분위기 조건에서 안정하고 높은 전기 전도도를 가지는 장점이 있다. 그러나, 장시간 운전 시 양극에서 전해질로의 Ni dissolution은 전지 내부의 단락을 초래하여 전지의 수명을 단축시킨다. 본 연구에서는 대체 전극물질로서 코발트와 나이오븀을 코팅시킨 NiO 전극을 제조하였으며, 이렇게 제조된 전극은 기존 NiO전극과 비교하여 낮은 Ni dissolution과 안정되고 우수한 전기화학 성능을 보임을 확인하였다.

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References

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