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Gas diffusion layer for a fuel cell, and fuel cell

A gas diffusion layer and fuel cell technology, applied in fuel cells, battery electrodes, electrical components, etc., can solve the problems of damaging fuel cell diaphragms and thin gas diffusion layers, and achieve high gas pressure, uniform temperature and pressure Distributing and reducing the effect of contact resistance

Pending Publication Date: 2021-10-29
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the possibilities of metal foams are limited because they can damage the thin gas diffusion layer or the microporous layer and also the membranes of the fuel cell

Method used

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  • Gas diffusion layer for a fuel cell, and fuel cell
  • Gas diffusion layer for a fuel cell, and fuel cell
  • Gas diffusion layer for a fuel cell, and fuel cell

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Embodiment Construction

[0054] In the following description of embodiments of the invention, identical or similar elements are provided with the same reference symbols, wherein a repeated description of these elements is omitted in individual cases. The figures show only schematically the subject-matter of the invention.

[0055] figure 1 A schematic illustration of a fuel cell stack 4 with a plurality of fuel cells 3 is shown. Each fuel cell 3 has a membrane 24 , two gas diffusion layers 1 , an anode 30 and a cathode 32 . The individual fuel cells 3 are delimited from one another by bipolar plates 50 , which may include cooling plates 45 .

[0056] The fuel cell stack 4 supplied with hydrogen 40 and oxygen 42 as well as a cooling medium 44 is closed by two end plates 48 and has a current collector 52 . The different supplies are separated from each other by seals 46 .

[0057] figure 2 A schematic representation of a fuel cell 3 with a gas diffusion layer 1 according to the prior art is shown....

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Abstract

The invention relates to a gas diffusion layer (1) for a fuel cell (3), comprising a composite material (5) that contains electrically conducting particles (7), a binder and fibers (9), preferably carbon fibers, the particles (7) and the fibers (9) being present in the composite material (5) in the form of a mixture. The invention also relates to a fuel cell and to a method for producing the gas diffusion layer.

Description

technical field [0001] The invention relates to a gas diffusion layer for a fuel cell, comprising a composite material. The invention also relates to a fuel cell comprising a gas diffusion layer, and a method for producing the gas diffusion layer. Background technique [0002] Fuel cells are primary cells that convert the chemical reaction energy of a continuous supply of fuel and oxidant into electrical energy. So a fuel cell is an electrochemical transducer. In known fuel cells especially hydrogen (H 2 ) and oxygen (O 2 ) into water (H 2 O), electricity and heat. [0003] The electrolysis device is an electrochemical transducer that converts water (H 2 O) is decomposed into hydrogen gas (H 2 ) and oxygen (O 2 ). [0004] Furthermore, proton-exchange-membrane (PEM) fuel cells are known, which are also referred to as polymer electrolyte fuel cells. Furthermore, anion exchange membranes are known both for fuel cells and for electrolysis devices. Proton exchange mem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0226H01M8/0228
CPCH01M8/0226H01M8/0228H01M2008/1095H01M4/8605H01M4/8807H01M8/0243Y02E60/50H01M8/0245H01M4/8668H01M4/8673H01M8/1004
Inventor H·鲍尔S·希普切恩J·哈肯贝格
Owner ROBERT BOSCH GMBH