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2023 (English)In: Journal of Power Sources, ISSN 0378-7753, E-ISSN 1873-2755, Vol. 555, article id 232341Article in journal (Refereed) Published
Abstract [en]
The electrical contact resistance is a key parameter for optimising both the bipolar plate of the polymer electrolyte membrane fuel cell (PEMFC) and the electrical contact of the power terminal of the stack. The contact resistance is affected by the conductivity, roughness, and hardness of the two contacting surfaces. Here, new, application-specific contact resistance measurement methods are proposed for both the stack power terminal, and the bipolar plate. The proposed methods are compared to methods from references as well as standards, and it is concluded that the uncertainty of the measurements can be reduced by changing the measurement setup, and that the influence of probe resistance on measurement results can be eliminated. Furthermore, the effect of different accelerated durability tests on the contact resistance of the power terminal is examined both on test coupons and on a prototype screw connection with an electroless NiP and an electroplated NiSn coatings. As expected, the NiSn coupons gives lower contact resistance after ageing as compared to the NiP. However, the increase in contact resistance seen on coupons after ageing is not observed on the prototype screw connection. © 2022 The Author(s)
Place, publisher, year, edition, pages
Elsevier B.V., 2023
Keywords
Aluminium, Electrical contact resistance, GDL, NiP, NiSn, PEMFC, Binary alloys, Current voltage characteristics, Durability, Electric contacts, Electric resistance measurement, Polyelectrolytes, Proton exchange membrane fuel cells (PEMFC), Screws, Uncertainty analysis, Bipolar-plates, Electrical contacts, Keys parameters, Measurement methods, PEM fuel cell, Power terminals, Resistance measurement, Screw connections, Contact resistance
National Category
Energy Engineering
Identifiers
urn:nbn:se:ri:diva-61352 (URN)10.1016/j.jpowsour.2022.232341 (DOI)2-s2.0-85142179649 (Scopus ID)
Note
Funding details: Horizon 2020 Framework Programme, H2020; Funding details: H2020 Marie Skłodowska-Curie Actions, MSCA, 764977; Funding details: Stiftelsen för Strategisk Forskning, SSF, ARC19-0026; Funding details: Stiftelsen för Kunskaps- och Kompetensutveckling, KKS; Funding details: Horizon 2020; Funding text 1: This work has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 764977, Swedish Foundation for Strategic Research (Project No. ARC19-0026), the ALUSAP project within the strategic innovation programme Metallic materials funded by Vinnova, Formas and Energimyndigheten, the Smart Industry Sweden project funded by the Swedish Knowledge Foundation. The authors would like to thank LPTech AB for performing the coating of the samples and Powercell AB for their input on the project.; Funding text 2: This work has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 764977 , Swedish Foundation for Strategic Research (Project No. ARC19-0026 ), the ALUSAP project within the strategic innovation programme Metallic materials funded by Vinnova , Formas and Energimyndigheten , the Smart Industry Sweden project funded by the Swedish Knowledge Foundation .
2022-12-092022-12-092024-05-20Bibliographically approved