Bipolar plate and process for producing a bipolar plate
AssigneesElringKlinger AG, Forschungszentrum Julich GmbH
InventorsThomas Kiefer, Frank Tietz
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Abstract
In order to provide a bipolar plate for a fuel cell unit, wherein the bipolar plate comprises a support layer of a metallic material and a protective layer, wherein the protective layer comprises an at least binary oxide system with at least two different types of metal cations, the protective layer of which prevents the formation of an oxide layer or changes the properties of the formed oxide layer such that lower mechanical stresses occur in the oxide layer, it is proposed that one type of metal cation of the oxide system of the protective layer is Mn and a further type of metal cation of the oxide system of the protective layer is Cu.
Claims26
Bipolar plate for a fuel cell unit, wherein the bipolar plate comprises a support layer of a metallic material and a protective layer, wherein the protective layer comprises an at least binary oxide system with at least two different types of metal cations, wherein one type of metal cation of the oxide system of the protective layer is Mn and a further type of metal cation of the oxide system of the protective layer is Cu.
Process for producing a bipolar plate for a fuel cell unit comprising the following process steps:
- applying a layer of a protective layer starting material to a support layer of the bipolar plate, wherein the protective layer starting material comprises Mn and Cu;
- increasing the temperature to a sintering temperature;
- cooling the support layer and the protective layer formed at the sintering temperature.
Dependencies are inferred from the claim text.