Abstract
Abstract Nickel has been considered advantageous as a bipolar plate for proton exchange membrane fuel cells (PEMFC). In fact, nickel presents high mechanical strength, good thermal and electrical conductivity in addition to its low cost. Nevertheless, the long-term exposure of nickel bipolar plate to the humid medium of PEMFC accelerates its corrosion kinetics which brings to PEMFC performance deterioration. The objective of this study is to improve the corrosion resistance of nickel bipolar plate by means of conductive polymer coating. Typically, polypyrrole film has been electrodeposited using chronopotentiometric technique at different current densities in aqueous sodium saccharin medium. The electrochemical behaviour of nickel in the presence of sodium saccharinate solution in the absence and the presence of the pyrrole monomer were investigated using cyclic voltammetry. Characterization of the polypyrrole coating was carried out using x-ray photoelectrons (XPS) and scanning electron microscopy (SEM). Corrosion behavior of the PPy coating has been studied in aggressive medium using 3.5% NaCl by OCP and EIS techniques.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
