Bipolar plate, method of production, and use thereof
AssigneeEKPO Fuel Cell Technologies GmbH
InventorsAlexander Hoeflich, Michael Goetz, Alexander Groeh
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Abstract
The present invention relates to a bipolar plate for a low-temperature fuel cell, in particular for a polymer electrolyte fuel cell, including a metal substrate with a coating on a surface of the substrate, the coating including an organic polymer and an electroconductive filler. The organic polymer is formed by chemical reaction of at least two components, including a bi- or polyfunctional isocyanate compound as the first component and one or more compounds having at least two free hydroxy or amino groups, as the second component.
Claims19
A bipolar plate for a low-temperature fuel cell, comprising a metal substrate with a coating on one or both surfaces of the substrate, the coating comprising an organic polymer and an electroconductive filler,
- wherein the organic polymer is formed by chemical reaction of at least two components, comprising a bi-or polyfunctional isocyanate compound as first component and one or more compounds having at least two free hydroxy or amino groups as second component,
- and wherein the second component is a prepolymer having at least two free hydroxy or amino groups, said prepolymer being selected from hydroxy-or amino-functional polyolefins, polyureas, alkyd resins and polyalkylsiloxanes.
Dependencies are inferred from the claim text.