In fuel cells, stacks of several hundred bipolar plates are combined in membrane electrode assemblies, in which the electrochemical reactions take place. As a result, it must be possible to produce the bipolar plates cost-efficiently. In addition, the corrosion resistance in the surrounding medium and the electrical conductivity have to be sufficiently high. As stainless steels show passivation over time, more expensive materials, like graphite or noble-metal coatings, are used. This paper describes an alternative coating, which can fulfil the above-mentioned requirements. Using electroplating, Cr coatings with thicknesses > 20 µm can be deposited at low costs and REACH compliant. Subsequently, the Cr layers are gas nitrided resulting in a dense Cr-N coating with electrical and corrosion properties exceeding the ones of common stainless steels. Using this new approach, well-performing fuel cells could be produced cost-efficiently.
Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:36249 |
Date | 25 November 2019 |
Creators | Scharf, Ingolf, Müller, Markus, Höhlich, Dominik, Mehner, Thomas, Holländer, Ulrich, Maier, Hans Jürgen, Lampke, Thomas |
Contributors | Technische Universität Chemnitz |
Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
Language | English |
Detected Language | English |
Type | info:eu-repo/semantics/acceptedVersion, doc-type:conferenceObject, info:eu-repo/semantics/conferenceObject, doc-type:Text |
Rights | info:eu-repo/semantics/openAccess |
Relation | urn:nbn:de:bsz:ch1-qucosa2-357204, qucosa:35720 |
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