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Assembly of a porous metal diffusion substrate and a polymeric separator membrane

A technology of porous metals and polymers, applied in diaphragms, electrolytic components, fuel cell components, etc., can solve problems such as reduced efficiency of electrolytic cells or fuel cells, restrictions on the maximum operating temperature of electrolytic cells, and increased size of electrolytic cell stacks. Achieve the effect of increasing performance and efficiency, increasing stability, and high flow

Inactive Publication Date: 2014-12-10
NV BEKAERT SA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The presence of a supporting substrate in the membrane also results in a membrane that is thicker than functionally required and the efficiency of an electrolytic cell or fuel cell using such a membrane is reduced
Furthermore, thicker membranes lead to an increase in the size of the electrolytic cell stack, which is detrimental to the mechanical trajectory
In addition, the reinforced carrier mesh is usually a polymer fabric, which limits the maximum operating temperature of the electrolytic cell
[0007] The disadvantage of the prior art is that the membrane preparation and the assembly of the membrane with the gas diffusion layer are produced in different steps

Method used

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  • Assembly of a porous metal diffusion substrate and a polymeric separator membrane
  • Assembly of a porous metal diffusion substrate and a polymeric separator membrane
  • Assembly of a porous metal diffusion substrate and a polymeric separator membrane

Examples

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Embodiment Construction

[0069] figure 1 An example of an assembly 100 of a porous metallic gas diffusion substrate 110 and a polymeric separator membrane 130 as in the first aspect of the invention is shown. The polymeric separator membrane 130 is infiltrated into the top 150 of the porous metallic gas diffusion substrate 110 .

[0070] figure 2 An example of an assembly 200 is shown of two porous metallic gas diffusion substrates 210, 215 with a polymeric separator membrane 250 in between, wherein the polymeric separator membrane 250 penetrates the top portion 260 of the two porous metallic gas diffusion substrates 210, 215 , 280.

[0071] An example of a slurry which can be used according to the invention to coat the membrane layer on the porous metallic gas diffusion layer comprises 49.07% by weight of zirconia (for example type E101 from MEL-Chemical), 8.66% by weight of polysulfone, % of glycerol and 41.17% by weight of N-ethylpyrrolidone (NEP).

[0072] image 3 An example of a coating an...

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Abstract

The invention relates to an assembly of a porous metallic gas diffusion substrate and a polymeric separator membrane for use in an alkaline electrolyser or alkaline fuel cell. The polymeric separator membrane of the assembly comprises inorganic hydrophilic particulates dispersed in an organic polymeric binder. The polymeric separator membrane is gas tight when filled with electrolyte. The polymeric separator membrane is penetrating into at least a top portion of the porous metallic gas diffusion substrate. Also disclosed is a method to produce such an assembly via coating a paste on a porous metallic gas diffusion substrate.

Description

technical field [0001] The present invention relates to assemblies of porous metallic gas diffusion substrates and polymeric separator membranes, for example for use in alkaline electrolytic cells and alkaline fuel cells. The invention also relates to methods of preparing such assemblies. Background technique [0002] Electrolyzers and fuel cells comprise electrodes (anode and cathode) and a separator which, at least under operating conditions, is gas-impermeable, thereby separating the anode and cathode. The separator may be a polymeric separator membrane. Since fuels and reaction products are available in gaseous and liquid states, the electrodes must provide means to allow diffusion of these fuels and reaction products to and from the reaction region. This can be achieved by using electrodes with open channel structures such as meshes, stretch metal or porous metal substrates. A catalyst may be used wherein the catalyst is provided on an electrode or on a separator, fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B9/20H01M4/74H01M8/06H01M8/08H01M4/86C25B9/19
CPCH01M4/8621C25B9/20H01M4/8807H01M8/0232Y02E60/50H01M8/0293H01M4/861H01M8/083C25B13/04H01M8/0656H01M4/745H01M8/0289Y10T156/10Y02E60/10C25B9/73H01M8/0239H01M8/0245
Inventor E·德肯彭尼尔I·席尔德曼斯J·万布拉班特洪博L·万梅勒G·德西W·米斯
Owner NV BEKAERT SA
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