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Method for bonding fuel cell components

A technology for fuel cells and components, which is applied in the field of combining fuel cell components, and can solve problems such as uncertainty of combining performance

Pending Publication Date: 2022-05-06
CELLCENTRIC GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, this structure has a serious drawback: the membrane, which is only partially coated with the catalyst, must be positioned very precisely
[0010] However, in experiments using this method, the inventors of the present invention have not yet been able to determine a significantly better binding performance compared to the prior art mentioned at the beginning

Method used

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  • Method for bonding fuel cell components
  • Method for bonding fuel cell components
  • Method for bonding fuel cell components

Examples

Experimental program
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Embodiment Construction

[0048] The present invention uses a full-surface catalyst-coated membrane to produce a composite of a frame for a PEM fuel cell and a catalyst-coated membrane (CCM), wherein no section for bonding is provided where the membrane is not coated Catalyst coating or catalyst coating has been removed. The catalyst-coated membrane is bonded to the frame to create the composite. Furthermore, this composite is subsequently bonded to two gas diffusion layers in order to form the core of a membrane electrode assembly (MEA). However, this method can also be used for other bonding tasks, or is only part of the bonding described.

[0049] exist figure 1 A part of this frame is shown in the illustration of , denoted by reference number 1 . An adhesive 2 activatable by ultraviolet radiation is attached to the frame 1 , for example by screen printing or inkjet printing in designated areas. The applied adhesive 2 is then briefly irradiated with UV radiation via a UV source 3 in order to act...

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Abstract

The invention relates to a method for bonding components (4, 9) of a PEM fuel cell to a frame (1) and / or to each other, for which purpose an adhesive (2), which can be cured by electromagnetic radiation in the visible or ultraviolet range, is applied to the frame (1) and / or to the at least one component (4, 9). The invention is characterized in that the adhesive (2) is activated by electromagnetic radiation and the adhesive (2) is heated after bringing the frame (1) and / or the components (4, 9) into contact; or bringing the frame (1) and / or the components (4, 9) into contact and exposing the adhesive (2) to electromagnetic radiation for activation and heating; so that the viscosity of the adhesive is reduced before the adhesive is finally cured. The binder (2) is a cationic epoxy resin containing water.

Description

technical field [0001] The invention relates to a method for joining components of a fuel cell to a frame and / or to each other according to the type defined in more detail in the preamble of claim 1 . The invention also relates to the use of this method in the manner defined in claims 11 and 12 . Background technique [0002] Bonding components of a PEM fuel cell to a frame and / or to each other by means of UV-curable adhesives is known in the prior art. For example, US 2018 / 0159160 A1 discloses a frame that is completely UV transparent so that the joint can be cured through the frame. Here, the frame is bonded to a membrane with a catalytic coating and the gas diffusion layer is also integrated into the composite. The disadvantage of this construction is that, on the one hand, it requires a frame that is mostly transparent to UV radiation, which is not the case with the commonly used polyethylene naphthalate (PEN) frames. DE 10 2015 117 077 A1 also describes the incorpora...

Claims

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Application Information

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IPC IPC(8): H01M8/0273H01M8/0284H01M8/0286H01M8/1004H01M8/1018
CPCH01M8/0286H01M8/0284H01M8/0273H01M2008/1095H01M8/1004Y02E60/50C09J2301/304C09J5/06C09J163/00C09J2203/33C09J2463/00H01M8/0267
Inventor M·麦迪纳M·斯佩尔科维奇T·马森C·帕特森
Owner CELLCENTRIC GMBH & CO KG