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Gas diffusion layer and preparation method thereof

A gas diffusion layer and surface coating technology, which is applied in the field of gas diffusion layer and its preparation, can solve the problems of high contact surface resistance, poor conduction effect of titanium fiber felt plate, and low contact efficiency, so as to reduce the contact surface resistance, Effects of improving electrolysis efficiency and improving contact efficiency

Pending Publication Date: 2021-12-14
QINGKE NEW ENERGY TECH (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a gas diffusion layer and a preparation method thereof, which can solve the problems of poor flow diversion effect, low contact efficiency and high contact surface resistance of the existing titanium fiber mat

Method used

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  • Gas diffusion layer and preparation method thereof
  • Gas diffusion layer and preparation method thereof
  • Gas diffusion layer and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0031] Such as figure 1 As shown, a kind of preparation method of gas diffusion layer is provided, comprising the following steps:

[0032] Step S1, process side-by-side strip-shaped grooves on one side of the metal sheet, and the strip-shaped grooves are used to form micropores on the gas diffusion layer. An important indicator of the gas diffusion layer is the porosity, which is the micropores. The ratio of the area of ​​the hole to the area of ​​the gas diffusion layer, and the size of the strip groove and the thickness of the metal sheet will affect the porosity of the gas diffusion layer. Let the depth of the strip groove be a, and the depth of the strip groove The width of the groove is b, the distance between adjacent strip-shaped grooves is c, and the total thickness of the metal sheet is d. By setting the ratio of these four parameters, a gas diffusion layer with a certain porosity can be obtained, such as a:b:c:d=1:1:1:2, the final porosity of the gas diffusion laye...

Embodiment 2

[0043] In the embodiment of the application, the application provides a gas diffusion layer, such as Figure 4 As shown, the gas diffusion layer is prepared by the preparation method described in Example 1. The specific structure includes a thin plate main body, and the thin plate main body is regularly arranged with several micropores penetrating the thin plate main body. The thickness of the thin plate main body is preferably 200-800 microns, such as Figure 4 As shown, the microwells are arranged in a rectangular array, and it can also be shown as Figure 5 As shown, the microholes are arranged in several rows, and the microholes in adjacent rows are arranged in a dislocation manner, which can make the microholes more uniform, and can improve the utilization of the area for the main body of the special-shaped thin plate.

[0044]This application adopts a brand-new preparation method, which has high efficiency and can prepare a gas diffusion layer with a smooth surface and ...

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Abstract

The invention discloses an air diffusion layer and a preparation method thereof. The preparation method comprises the following steps: S1, side-by-side strip-shaped grooves are processed in the surface of one side of a metal sheet; S2, the metal sheet with the long-strip-shaped groove is cut into a needed shape; s3, the multiple cut metal sheets are stacked, the adjacent metal sheets are tightly attached and firmly connected, and a metal block with a regular pore structure inside is formed; and S4, the metal block is cut along the cross section of the metal block, the cutting thickness is matched with the thickness of the needed gas diffusion layer, and a sheet structure with micropores regularly distributed in the surface is formed through cutting and serves as the gas diffusion layer. The gas diffusion layer can solve the problems that an existing titanium fiber felt plate is poor in flow guide effect, low in contact efficiency and large in contact surface resistance.

Description

technical field [0001] The invention relates to the field of hydrogen production by electrolysis of water, in particular to a gas diffusion layer and a preparation method thereof. Background technique [0002] Hydrogen production by electrolysis is considered as a new type of energy storage method, and it is also one of the methods capable of large-scale consumption of renewable energy, which has been unanimously recognized in the world. The methods of electrolytic hydrogen production are mainly divided into traditional alkaline electrolysis of water and emerging solid electrolyte (SPE) electrolysis of water to produce hydrogen, and SPE electrolysis of water for hydrogen production has high efficiency, miniaturized equipment, rapid start and stop, no pollution, It has the advantages of high purity of hydrogen production, so it is competitive in the new energy power generation scenario that accommodates extremely fluctuating fluctuations. [0003] The main components of the ...

Claims

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Application Information

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IPC IPC(8): C25B11/032C25B1/04C25B9/23
CPCC25B11/032C25B1/04C25B9/23Y02E60/36Y02E60/50
Inventor 毛学伟林卫兵滕彪
Owner QINGKE NEW ENERGY TECH (SHANGHAI) CO LTD
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