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Method of manufacturing catalytically coated membrane and membrane electrode unit and fuel cell stack

A technology for fuel cells and catalytic materials, which can be used in fuel cells, electrical components, battery electrodes, etc., and can solve problems such as loss of catalytic materials

Active Publication Date: 2020-10-23
VOLKSWAGEN AG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In each case, overcoating means loss of catalytic material

Method used

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  • Method of manufacturing catalytically coated membrane and membrane electrode unit and fuel cell stack
  • Method of manufacturing catalytically coated membrane and membrane electrode unit and fuel cell stack
  • Method of manufacturing catalytically coated membrane and membrane electrode unit and fuel cell stack

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Experimental program
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Embodiment Construction

[0029] figure 1 A detail of a fuel cell stack indicated overall by 100 is shown, only two individual fuel cells 10 being shown here.

[0030] Each fuel cell 10 has a polymer electrolyte membrane 11 consisting of an electrolyte-conducting, in particular proton-conducting, polymer material.

[0031] Typically, polymeric materials require a certain amount of humidity in order to maintain their dielectric conductivity. The catalyst layers, ie the catalyst layer 12 of the anode and the catalyst layer 13 of the cathode, each adjoin the two flat sides of the membrane 11 . Catalyst layers 12 and 13 comprise a catalytic material, typically a noble metal, especially platinum. Typically, the catalyst layers 12 , 13 also comprise a porous, electrically conductive carrier material on which a catalytic material, for example a carbon-based material, is present in a finely dispersed manner. The catalyst layers 12, 13 may comprise other components such as polymeric binder materials and the...

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PUM

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Abstract

The invention relates to a method for producing a catalyst coated membrane (19) for a fuel cell (10), wherein the catalyst coated membrane (19) has a membrane (11) and a catalyst layer (12, 13) of a catalytic material arranged on at least one of its flat sides, as well as a nonrectangular active area (20), which is restricted in one direction by two outer sides (30) opposite one another. The method comprises a continuous application of the catalytic material to a membrane material (33) while creating a constant coating width (B) such that an area (35) coated with the catalytic material corresponds to at least the active area (20). A provision is that the membrane material (33) be coated with the catalytic material such that a coating direction (D) has an angle with respect to the opposite outer sides (30) of the active area (20) that is not equal to 90° and not equal to 0°.

Description

technical field [0001] The invention relates to a method for producing a catalytically coated membrane having a membrane and a catalyst layer of catalytic material arranged on at least one of its flat sides. Furthermore, the invention relates to a membrane electrode unit having such a catalytically coated membrane, and to a fuel cell comprising a plurality of such membrane electrode units alternately stacked with bipolar plates . Background technique [0002] Fuel cells use the chemical conversion of fuel and oxygen into water to generate electricity. For this purpose, the fuel cell contains a so-called membrane electrode unit (MEA as an abbreviation for membrane electrode unit) as a core component, which is composed of an ion-guiding (mostly proton-guiding) membrane and a membrane electrode arranged on both sides of the membrane. A structure consisting of electrodes (anode and cathode). Furthermore, a gas diffusion layer (GDL) can be arranged on both sides of the membran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M8/1004
CPCH01M4/881H01M8/1004H01M2008/1095Y02E60/50H01M4/8626H01M8/242
Inventor M.库西S.鲁塞尔A.梁
Owner VOLKSWAGEN AG