Passivation Behavior and Surface Resistance of Electrodeposited Nickel-Carbon Composites

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  • PARK Jesik
    School of Advanced Materials & Systems Engineering, Kumoh National Institute of Technology
  • DILASARI Bonita
    Department of Energy & Mineral Resources Engineering, Sejong University
  • KIM Youngjun
    Advanced Battery Research Center, Korea Electronics Technology Institute
  • KIM Kijae
    Advanced Battery Research Center, Korea Electronics Technology Institute
  • LEE Churl Kyoung
    School of Advanced Materials & Systems Engineering, Kumoh National Institute of Technology
  • KWON Kyungjung
    Department of Energy & Mineral Resources Engineering, Sejong University

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Bipolar plates in fuel cells and redox flow batteries are one of the most expensive components, which become a crucial factor for their commercialization. In this report, nickel and carbon are co-electrodeposited from Watts solution containing carbon black powder, and the Ni-C composites are characterized by SEM, EDS, XRD and surface profilometry. The intrinsic passivation behavior and the sheet resistance of Ni-C are on a par with pure Ni when carbon is introduced less than 26 at% in the composite, but the introduction of carbon to Ni suppresses the increase in sheet resistance after a storage corrosion test, which invites the expectation of high durability as bipolar plate materials. This kind of approach where carbon is introduced to metal-based bipolar plates by electrodeposition can improve the surface properties of pure metal bipolar plates with maintaining their price competitiveness over graphite-based composites and other high cost manufacturing techniques.

収録刊行物

  • Electrochemistry

    Electrochemistry 82 (7), 561-565, 2014

    公益社団法人　電気化学会

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