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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 cells
Isfahan Univ Technol, Dept Mat Engn, Esfahan 8415683111, Iran..
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering, Applied Electrochemistry. Isfahan Univ Technol, Dept Mat Engn, Esfahan 8415683111, Iran..
Isfahan Univ Technol, Dept Mat Engn, Esfahan 8415683111, Iran..
Isfahan Univ Technol, Dept Mat Engn, Esfahan 8415683111, Iran..
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2019 (English)In: Journal of Power Sources, ISSN 0378-7753, E-ISSN 1873-2755, Vol. 435, article id 226818Article in journal (Refereed) Published
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.

Place, publisher, year, edition, pages
ELSEVIER , 2019. Vol. 435, article id 226818
Keywords [en]
PEM fuel cell, Bipolar plate, Physical vapor deposition, Cathodic arc evaporation, Interfacial contact resistance, Corrosion resistance
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-259414DOI: 10.1016/j.jpowsour.2019.226818ISI: 000482496300033Scopus ID: 2-s2.0-85068182105OAI: oai:DiVA.org:kth-259414DiVA, id: diva2:1354045
Note

QC 20190924

Available from: 2019-09-24 Created: 2019-09-24 Last updated: 2019-09-24Bibliographically approved

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Rashtchi, Hamed

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