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Gas diffusion layer, electrochemical cell having such a gas diffusion layer, and electrolyzer

A gas diffusion layer, electrochemical technology, applied in the direction of electrochemical generators, battery electrodes, electrolytic components, etc., can solve the problems of high manufacturing cost, difficult warping temperature, etc., and achieve the effect of easy manufacturing

Active Publication Date: 2017-02-22
SIEMENS ENERGY GLOBAL GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the gas diffusion layer meets the requirements for electrical conductivity and porosity, no additional tolerance compensation can be carried out for the components of the electrolysis cell on both sides of the gas diffusion layer
Furthermore, such disks are relatively costly to manufacture and are limited in size due to the pressures required during the manufacture of such disks.
In addition, there is a warpage temperature in large components, and the warpage temperature is difficult to control

Method used

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  • Gas diffusion layer, electrochemical cell having such a gas diffusion layer, and electrolyzer
  • Gas diffusion layer, electrochemical cell having such a gas diffusion layer, and electrolyzer
  • Gas diffusion layer, electrochemical cell having such a gas diffusion layer, and electrolyzer

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Embodiment Construction

[0044] exist figure 1 The structure of the electrochemical cell 2 is schematically shown in , the electrochemical cell being formed as a PEM electrolysis cell. The electrochemical cell 2 is part of an electrolyzer, not shown in detail here, for splitting water by means of an electric current into the products hydrogen and oxygen.

[0045] The electrochemical cell 2 comprises an electrolyte consisting of a proton-conducting membrane 4 (proton exchange membrane, PEM), on which electrodes 6a, 6b are located on both sides. A unit consisting of a membrane and an electrode is called a membrane electrode unit (MEA). Here, the cathode is denoted by 6a, and the anode is denoted by 6b. The gas diffusion layer 8 is placed against the electrodes 6a, 6b, respectively. The gas diffusion layers 8 are contacted by so-called bipolar plates 10 , which are separated from one another in the assembled state of an electrolytic stack composed of a plurality of individual electrolytic cells 2 .

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Abstract

The invention relates to a gas diffusion layer (8) for arranging between a bipolar plate (10) and an electrode (6a, 6b) of an electrochemical cell (2) comprising at least two layers layered one over the other, wherein one of the layers is designed as a spring component (12a, 12b, 12c) having a progressive spring characteristic curve.

Description

technical field [0001] The invention relates to a gas diffusion layer for an electrochemical cell, especially a gas diffusion layer for a PEM electrolytic cell. The invention also relates to an electrochemical cell, in particular a PEM electrolytic cell or a galvanic cell, having such a gas diffusion layer, and to an electrolyzer. Background technique [0002] Electrochemical cells are generally known and are divided into galvanic cells and electrolytic cells. An electrolytic cell is a device in which an electric current forces a chemical reaction in which at least a portion of the electrical energy is converted into chemical energy. Galvanic cells are devices - complementary to electrolytic cells - for the spontaneous conversion of chemical energy into electrical energy. Known devices with such galvanic cells are, for example, fuel cells. [0003] The splitting of water into the products hydrogen and oxygen by means of electrolytic cells by means of an electric current h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B9/10C25B9/20C25B11/03C25B9/17C25B9/23
CPCC25B9/23C25B9/75C25B11/036C25B11/031Y02E60/36Y02E60/50C25B1/04C25B9/73H01M8/0245H01M4/8807
Inventor 亚历山大·汉亚历山大·施皮斯约亨·施特劳布
Owner SIEMENS ENERGY GLOBAL GMBH & CO KG
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