|Title||Bipolar plate materials for PEMFCs: A conductivity and stability study|
|Publication Type||Articolo su Rivista peer-reviewed|
|Year of Publication||2008|
|Authors||Pozio, A., Zaza F., Masci A., and Silva R.F.|
|Journal||Journal of Power Sources|
|Keywords||Chromium nitrides, Corrosion resistance, Electric conductivity, Interfacial contact resistance, Nickel alloys, Physical vapor deposition, Proton exchange membrane fuel cells (PEMFC), Stainless steel, Surface chemistry|
Commercial stainless steels, Ni-based alloys and physical vapor deposition (PVD) chromium nitride (CrN)-coated stainless steels were evaluated as possible metallic bipolar plate materials in conditions that resemble a typical PEMFC cathode environment with respect to their interfacial contact resistance (ICR) and corrosion resistance. Results show that stainless steels have a high ICR and undergo corrosion. Although Ni-based alloys showed an ICR value comparable as to that of graphite, their behaviour was not satisfactory in a corrosive acidic medium. Only CrN-coated stainless steels demonstrated to have low ICR values and a very good corrosion resistance. © 2008 Elsevier B.V. All rights reserved.
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