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Method for producing a gas diffusion layer for a fuel cell

A gas diffusion layer and fuel cell technology, which is applied in the direction of fuel cells, electrical components, battery electrodes, etc., can solve the problems of local performance fluctuations and obstacles of fuel cells

Pending Publication Date: 2021-04-20
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The transport of oxygen-containing reactants is hindered in locally filled regions of the porous structure of the gas diffusion layer, so that the local performance of the fuel cell fluctuates

Method used

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  • Method for producing a gas diffusion layer for a fuel cell
  • Method for producing a gas diffusion layer for a fuel cell
  • Method for producing a gas diffusion layer for a fuel cell

Examples

Experimental program
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Embodiment Construction

[0046] figure 1 A known gas diffusion layer GDL*, which is placed on a membrane M, is shown. The gas diffusion layer GDL* and the membrane M are electrically bonded to each other. The gas diffusion layer GDL* and the membrane M together form a membrane electrode unit MEA for the fuel cell 100*.

[0047] figure 2 A gas diffusion layer GDL within the meaning of the invention is shown, which is likewise placed on the membrane M. FIG. Within the scope of the invention, the gas diffusion layer GDL and the membrane M are electrically connected to one another. The gas diffusion layer GDL and the membrane M together form a membrane electrode unit MEA for the fuel cell 100 .

[0048] as by figure 2 It can be seen that the gas diffusion layer GDL in the sense of the invention has different components M1, M2 or different precursors, for example in the form of aggregates, which according to the invention have different wetting properties (see later Figure 6 ).

[0049] Within t...

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Abstract

The invention relates to a method for producing a gas diffusion layer (GDL) for a fuel cell (100), comprising the following steps: 1) providing particulate components (M1, M2): a) of a first component (M1) having a first wetting angle of contact, and b) of a second component (M2) having a second wetting angle of contact, which differs from the first wetting angle of contact, 2) mixing the first component (M1) together with the second component (M2) to form an inhomogeneous mixture, 3), producing a ribbon-shaped material from the inhomogeneous mixture, 4) cutting a gas diffusion layer (GDL) from the ribbon-shaped material.

Description

technical field [0001] The invention relates to a method for producing a gas diffusion layer for a fuel cell according to the independent method claim. Furthermore, the invention relates to a corresponding gas diffusion layer according to the independent device claim. Furthermore, the invention relates to a corresponding fuel cell according to the independent independent device claim. Background technique [0002] Fuel cells are electrochemical transducers. In polymer electrolyte membrane fuel cells, or PEM fuel cells for short, the reactants hydrogen and oxygen are converted into water, electricity and heat in order to obtain energy. According to the prior art, PEM fuel cells are constructed as a stack of repeating units comprising a cathode region, a bipolar plate, an anode region and a membrane electrode unit. Bipolar plates are conductive but impermeable to gases and ions. The bipolar plates distribute eg hydrogen in the anode region and eg oxygen or air in the catho...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88
CPCH01M4/8652H01M4/8636H01M4/8668H01M4/8864H01M4/8875H01M2008/1095H01M4/8807Y02E60/50
Inventor H·鲍尔
Owner ROBERT BOSCH GMBH