용융탄산염 연료전지 Anode부 집전판의 부식특성

한원규; 주정운; 신정철; 강성군; 전중환; 임희천; Won-Kyu Han; Jeong-Woon Ju; Jung-Cheol Shin; Sung-Goon Kang; Joong-Hwan Jun; Hee-Chun Lim

Korean Journal of Materials Research, Vol.18, No.5, 259-265, May, 2008

DOI10.3740/MRSK.2008.18.5.259 Export Citation

용융탄산염 연료전지 Anode부 집전판의 부식특성

Corrosion Behavior of Anode Current Collectors in Molten Carbonate Fuel Cells

한원규, 주정운, 신정철¹, 강성군 ^†, 전중환², 임희천³

한양대학교 신소재공학부
¹한양대학교 철강공정 및 응용연구소
²포항산업과학연구원
³한전 전력연구원

Won-Kyu Han, Jeong-Woon Ju, Jung-Cheol Shin¹, Sung-Goon Kang^†, Joong-Hwan Jun², and Hee-Chun Lim³

Division of Materials Science and Engineering, Hanyang University, Seoul 133-791, South Korea
¹Research Institute of Steel Processing & Application, Hanyang University, Seoul 133-791, South Korea
²Research Institute of Science &Technology, Korea
³Korea Electric Power Research Institute, Daejeon 305-380, South Korea

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The corrosion and degradation factors of a current collector in a molten carbonate fuel cell (MCFC) were investigated to determine the optimized coating thickness of nickel on STS316L. The results show that the surface morphology and electrical properties depended on the nickel coating thickness. The surface morphology gradually changed from a flat to a porous structure along as the nickel coating thickness decreased, and the electrical resistance of the nickel-coated STS316L increased as the nickel coating thickness decreased. This can be attributed to the diffusion of elements of Fe and Cr from the substrate through the nickel grain boundaries. Additionally, carburization in the metal grains or grain boundaries in an anodic environment was found to influence the electrical properties due to matrix distortion. The resistance of Cr-oxide layers formed in an anodic environment causes a drop in the potential, resulting in a decrease in the system efficiency.

Keywords:molten carbonate fuel cell (MCFC);corrosion;STS316L;nickel

[References]

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Bergman B, Lagergren C, Lindbergh G, Schwartz S, Zhu BH, J. Electrochem. Soc., 148(1), A38 (2001)
Biedenkopf P, Spiegel M, Grabke HJ, Electrochim. Acta, 44(4), 683 (1998)
Capobianco P, Guarnone P, Leonini M, Torazza A, High temperature corrosion in molten carbonate fuel cells for power generation, in Proceedings of the International AIM/NACE Conference, (Venice, May 18.19, 2000) p.189. (2000)
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Vossen JP, Makkus RC, Dewit JH, J. Electrochem. Soc., 143(1), 66 (1996)
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Parezanovic I, Strauch E, Spiegel M, J. Power Sources, 135(1-2), 52 (2004)

[Related Articles]

[1] Huijsmans JPP, Kraaij GJ, Makkus RC, Rietveld G, Sitters EF, Reijers HTJ, J. Power Sources, 86(1-2), 117 (2000)

[2] Bergman B, Lagergren C, Lindbergh G, Schwartz S, Zhu BH, J. Electrochem. Soc., 148(1), A38 (2001)

[3] Biedenkopf P, Spiegel M, Grabke HJ, Electrochim. Acta, 44(4), 683 (1998)

[4] Capobianco P, Guarnone P, Leonini M, Torazza A, High temperature corrosion in molten carbonate fuel cells for power generation, in Proceedings of the International AIM/NACE Conference, (Venice, May 18.19, 2000) p.189. (2000)

[5] Randstrom S, Lagergren C, Capobianco P, J. Power Sources, 160(2), 782 (2006)

[6] Vossen JP, Plomp L, Dewit JH, J. Electrochem. Soc., 141(11), 3040 (1994)

[7] Vossen JP, Makkus RC, Dewit JH, J. Electrochem. Soc., 143(1), 66 (1996)

[8] Durante G, Vegni S, Capobianco P, Golgovici F, J. Power Sources, 152(1), 204 (2005)

[9] Parezanovic I, Strauch E, Spiegel M, J. Power Sources, 135(1-2), 52 (2004)