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US 12,620,603 B2Granted
Bipolar plate, fuel cell, and method for producing a bipolar plate
AssigneeEKPO Fuel Cell Technologies GmbH
InventorAlexander Höflich
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Abstract
In order to provide a bipolar plate that has optimized electrical conductivity and can be produced as easily as possible, the invention proposes that the bipolar plate comprises an electrically conductive main body and an electrically conductive coating, wherein the electrically conductive coating comprises a binding material and one or more electrically conductive fillers, and wherein a pigment volume concentration in the coating corresponds at least to a pigment volume concentration required to achieve a percolation threshold.
Claims19
A bipolar plate comprising:
- an electrically conductive main body;
- and
- an electrically conductive coating, wherein
- the electrically conductive coating comprises a binding material and one or more electrically conductive fillers,
- a pigment volume concentration in the coating corresponds at least to a pigment volume concentration required to reach a percolation threshold,
- the one or more electrically conductive fillers have a surface modification,
- the binding material comprises an adhesion promoter component that serves as an adhesion promoter to the main body and which is coupled or couplable to the surface modification, and
- a degree of the surface modification and a content of the adhesion promoter component result in an adhesive strength between the coating and the main body of GT 1 or less.
5 more elements
Dependencies are inferred from the claim text.