Graphite-polypyrrole coated 316L stainless steel as bipolar plates for proton exchange membrane fuel cells |
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| Authors: | Li-jun Yang Hai-jun Yu Li-jun Jiang Lei Zhu Xu-yu Jian Zhong Wang |
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| Affiliation: | (1) Department of Chemical Engineering, Arizona State University, Tempe, AZ, USA;(2) Department of Chemical Engineering, University of Arizona, Tucson, AZ, USA |
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| Abstract: | 316L stainless steel (SS 316L) is quite attractive as bipolar plates in proton exchange membrane fuel cells (PEMFC). In this
study, graphite-polypyrrole was coated on SS 316L by the method of cyclic voltammetry. The surface morphology and chemical
composition of the graphite-polypyrrole composite coating were investigated by scanning electron microscopy (SEM) and X-ray
photoelectron spectroscopy (XPS). A simulated working environment of PEMFC was applied for testing the corrosion properties
of graphite-polypyrrole coated SS 316L. The current densities in the simulated PEMFC anode and cathode conditions are around
3×10−9 and 9×10−5 A·cm−2, respectively. In addition, the interfacial contact resistance (ICR) was also investigated. The ICR value of graphite-polypyrrole
coated SS 316L is much lower than that of bare SS 316L. Therefore, graphite-polypyrrole coated SS 316L indicates a great potential
for the application in PEMFC. |
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