This title appears in the Scientific Report :
2019
Please use the identifier:
http://dx.doi.org/10.1016/j.jpowsour.2019.226718 in citations.
Bilayer CrN/CrCoating Modified 316L Stainless Steel Bipolar Plates for High Temperature Polymer Electrolyte Fuel Cells
Bilayer CrN/CrCoating Modified 316L Stainless Steel Bipolar Plates for High Temperature Polymer Electrolyte Fuel Cells
In this work, a bilayer CrN/Cr coating was deposited on the surface of a 0.1 mm-thick SS316L specimen with a size of 60 × 60 mm2 by means of a reactive magnetron sputtering method. Using a specially-designed electrochemical cell for simulating the HT-PEFC environment, various electrochemical tests,...
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Personal Name(s): | Li, Ruiyu (Corresponding author) |
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Cai, Yun / Wippermann, Klaus / Lehnert, Werner | |
Contributing Institute: |
Technoökonomische Systemanalyse; IEK-3 |
Published in: | Journal of power sources, 434 (2019) S. 226718 - |
Imprint: |
New York, NY [u.a.]
Elsevier
2019
|
DOI: |
10.1016/j.jpowsour.2019.226718 |
Document Type: |
Journal Article |
Research Program: |
Fuel Cells |
Publikationsportal JuSER |
In this work, a bilayer CrN/Cr coating was deposited on the surface of a 0.1 mm-thick SS316L specimen with a size of 60 × 60 mm2 by means of a reactive magnetron sputtering method. Using a specially-designed electrochemical cell for simulating the HT-PEFC environment, various electrochemical tests, including potentiodynamic polarization, potentiostatic polarization and EIS, were performed in order to evaluate the anti-corrosion properties and stability of the bilayer CrN/Cr coating in simulated HT-PEFC environments. Additionally, ex-situ characterizations using XRD, SEM + EDX and ICR were carried out to investigate the crystal structure and composition of CrN/Cr coating, surface morphologies and the interfacial contact resistance of samples before and after corrosion tests. The results show that the bilayer CrN/Cr coating could provide a more than 99.9% protective effect on the substrate (SS316L) in the simulated HT-PEFC environment at RT and 130 °C, and reduce the corrosion rates of BPPs more than 600 times in both the simulated cathodic and anodic environments of a HT-PEFC. Furthermore, an ICR value of CrN/Cr SS316L (5.5 mΩ cm2) is around one order of magnitude lower than that of the bare SS316L substrate (47 mΩ cm2) in a typical pressing force for assembling fuel cells (140 N cm−2). |