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  • 1.
    Jannat, Sharif
    et al.
    Isfahan Univ Technol, Dept Mat Engn, Esfahan 8415683111, Iran..
    Rashtchi, Hamed
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering, Applied Electrochemistry. Isfahan Univ Technol, Dept Mat Engn, Esfahan 8415683111, Iran..
    Atapour, Masoud
    Isfahan Univ Technol, Dept Mat Engn, Esfahan 8415683111, Iran..
    Golozar, Mohammad Ali
    Isfahan Univ Technol, Dept Mat Engn, Esfahan 8415683111, Iran..
    Elmkhah, Hassan
    Bu Ali Sina Univ, Fac Engn, Hamadan 6517838695, Iran..
    Zhiani, Mohammad
    Isfahan Univ Technol, Dept Chem, Esfahan 8415683111, Iran..
    Preparation and performance of nanometric Ti/TiN multi-layer physical vapor deposited coating on 316L stainless steel as bipolar plate for proton exchange membrane fuel cells2019In: Journal of Power Sources, ISSN 0378-7753, E-ISSN 1873-2755, Vol. 435, article id 226818Article in journal (Refereed)
    Abstract [en]

    The current research mainly focuses on surface properties, corrosion resistance and interfacial contact resistance (ICR) of nanometric titanium/titanium nitride (Ti/TiN) multi-layer coating deposited on 316L stainless steel via physical vapor deposition (PVD) technique for using in proton exchange membrane fuel cell (PEMFC) bipolar plate (BPP) application. The phase and microstructure of the coated BPPs is characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and contact angle examinations. The performance of the BPPs is investigated by electrochemical corrosion tests including electrochemical impedance spectroscopy (EIS), potentiodynamic and potentiostatic polarization tests at two conditions including at ambient temperature and in the simulated PEMFC cathode environment. Electrochemical test results reveal that the Ti/TiN coating increases the polarization resistance of 316L stainless steel by 26 orders of magnitude at ambient temperature and by 1000 orders of magnitude in the simulated PEMFC cathode environment. The corresponding ICR of the BPPs is measured ex-situ in a PEMFC set-up. It is observed that the coated BPP has ICR value of 11 and 18 m Omega cm(2) before and after potentiostatic polarization, respectively. Hence, the Ti/TiN coating studied in this work has promising properties as BPP material and is potentially suitable alternative to replace the graphite BPP in PEMFC.

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