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Characteristics of Fluorine-Doped Tin Oxide Film Coated on SUS 316 Bipolar Plates for PEMFCs

ECR-MOCVD를 이용하여 연료 전지 분리판에 코팅된 FTO막의 특성 연구

  • Park, Ji-Hun (Advanced Energy materials processing laboratory, Energy Storage Research Center, Korea Institute of Science and Technology) ;
  • Hudaya, C. (Advanced Energy materials processing laboratory, Energy Storage Research Center, Korea Institute of Science and Technology) ;
  • Jeon, Bup-Ju (Department of Energy Resources, Hanbuk University) ;
  • Byun, Dong-Jin (Department of Material Science&Engineering, Korea University) ;
  • Lee, Joong-Kee (Advanced Energy materials processing laboratory, Energy Storage Research Center, Korea Institute of Science and Technology)
  • 박지훈 (한국과학기술연구원 에너지 저장 센터) ;
  • ;
  • 전법주 (한북대학교 에너지자원학과) ;
  • 변동진 (고려대학교 신소재공학과) ;
  • 이중기 (한국과학기술연구원 에너지 저장 센터)
  • Received : 2011.04.22
  • Accepted : 2011.06.20
  • Published : 2011.06.30

Abstract

Polymer electrolyte membrane fuel cells (PEMFCs) use the bipolar plate of various materials between electrolyte and contact electrode for the stable hydrogen ion exchange activation. The bipolar plate of various materials has representatively graphite and stainless steel. Specially, stainless steels have advantage for low cost and high product rate. In this study, SUS 316 was effectively coated with 600 nm thick F-doped tin oxide (SnOx:F) by electron cyclotron resonance-metal organic chemical vapor deposition and investigated in simulated fuel cell bipolar plates. The results showed that an F-doped tin oxide (SnOx:F) coating enhanced the corrosion resistance of the alloys in fuel cell bipolar plates, though the substrate steel has a significant influence on the behavior of the coating. Coating SUS 316 for fuel cell bipolar plates steel further improved the already excellent corrosion resistance of this material. After coating, the increased ICR values of the coated steels compared to those of the fresh steels. The SnOx:F coating seems to add an additional resistance to the native air-formed film on these stainless steels.

Acknowledgement

Supported by : National Research Foundation

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