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자료유형
학술저널
저자정보
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.20 No.4
발행연도
2014.1
수록면
629 - 639 (11page)

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Metallic bipolar-plates have advantages over non-porous graphite ones due to their higher mechanical strengthand better electrical conductivity. However, corrosion resistance and interfacial contact resistance are majorconcerns that remain to be solved, since metals such as stainless steels may develop oxide layers that decreaseelectrical conductivity, thus lowering fuel cell efficiency. In this study, multi-layered nitride coatings consistingof Ti and TiN were deposited on 316L stainless steel (SS316L) by a D.C magnetron sputtering method toenhance the corrosion resistance and to lower the interfacial contact resistance (ICR) of metallic bipolarplatesfor a polymer electrolyte membrane fuel cell (PEMFC). Electrochemical methods were conducted andICRs of the coated specimens were measured to investigate the potential of the coated metallic bipolar-platefor use in PEMFCs. The multi-layered Ti/TiN coating deposited on SS316 showed lower ICR values than thesingle-layered TiN coating, and improved corrosion resistance when the PEMFC was not in operation whilethe degradation of the coating layer was observed in both cathodic and anodic working environments.

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