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Metal gas diffusion layer and manufacturing method and application thereof

A technology of gas diffusion layer and manufacturing method, which is applied in the direction of final product manufacturing, sustainable manufacturing/processing, electrical components, etc., can solve the problems of unimproved drainage and air permeability, complicated processing method and large surface contact resistance, etc. , to achieve the effect of being suitable for large-scale production, the process is simple and easy to operate, and the adhesion is reduced

Active Publication Date: 2022-08-05
JIANGSU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Wang et al. (Journal of Power Sources, 2021, 515, 230636) used 3D printing technology to fabricate a metal gas diffusion layer with an ordered structure of porous titanium "bone". The porous titanium is obtained by decomposing TiH 2 And then sintered to generate, and then found that the gas diffusion layer permeability of this ordered structure is higher than the traditional gas diffusion layer, and compared the fuel cell with the gas diffusion layer of this ordered structure and the ordinary fuel cell, found that its The power density has been greatly increased, but this processing method is complicated and time-consuming, which is not conducive to large-scale production; patent CN102082277A discloses a metal gas diffusion layer for fuel cells and its preparation method. Method to prepare stainless short fiber sintered felt, and then undergo a series of treatments to increase its contact performance and anti-corrosion performance
However, its drainage and air permeability have not been improved, and the surface contact resistance is relatively large.

Method used

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  • Metal gas diffusion layer and manufacturing method and application thereof
  • Metal gas diffusion layer and manufacturing method and application thereof
  • Metal gas diffusion layer and manufacturing method and application thereof

Examples

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Effect test

Embodiment 1

[0044] This embodiment provides a metal gas diffusion layer, the top view of the two sides of the layer is as follows figure 1 and figure 2 shown, figure 1 The schematic diagram of the cross section along the dotted line is as follows image 3 As shown in the figure, the metal gas diffusion layer 1 is made of titanium metal, and its length is 30 mm, the width is 30 mm, and the thickness is 400 μm; in the metal gas diffusion layer 1, there are orderly funnel-like distributions in the positive and negative directions. Through holes, the metal gas diffusion layer 1 forms the inner wall part and the openings A21 and B22 on both sides; the shape of the funnel-like through holes is divided into a head 3 and a skirt 4; the head The central axis of the part 3 and the skirt part 4 are the same straight line and perpendicular to the two side surfaces of the metal gas diffusion layer 1; 70%;

[0045] The head 3 is a circular frustum, and the head 3 forms a diameter d on the surface ...

Embodiment 2

[0049] This embodiment provides a metal gas diffusion layer, the top view of the two sides of the layer is as follows Figure 4 and Figure 5 As shown in the figure, the material of the metal gas diffusion layer 1 is copper alloy, its length is 35mm, the width is 25mm, and the thickness is 300μm; Through holes, the metal gas diffusion layer 1 forms the inner wall part and the openings A21 and B22 on both sides; the shape of the funnel-like through holes is divided into a head and a skirt; the head and The central axis of the skirt is the same straight line and is perpendicular to both sides of the metal gas diffusion layer; the total area of ​​the inner walls of all the through holes accounts for 80% of the total area of ​​the inner and outer surfaces of the metal gas diffusion layer;

[0050] The head is a regular quadrangular pyramid, and the head forms a square opening A21 on the surface of the metal gas diffusion layer, and the diameter of the inscribed circle of the open...

Embodiment 3

[0054] This embodiment provides a metal gas diffusion layer, the top view of the two sides of the layer is as follows Image 6 and Figure 7 As shown, the material of the metal gas diffusion layer 1 is stainless steel, its length is 60mm, the width is 50mm, and the thickness is 600μm; The metal gas diffusion layer 1 forms the inner wall part and the openings A21 and B22 on both sides; the shape of the funnel-like through hole is divided into a head and a skirt; the head and the skirt The central axis of the part is the same straight line and perpendicular to both sides of the metal gas diffusion layer; the total area of ​​the inner walls of all the through holes accounts for 75% of the total area of ​​the inner and outer surfaces of the metal gas diffusion layer;

[0055] The head is a regular triangular prism, and the head forms an equilateral triangle (equilateral triangle) opening A21 on the surface of the metal gas diffusion layer, and the diameter of the inscribed circle...

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Abstract

The invention relates to a metal gas diffusion layer and a manufacturing method and application thereof, funnel-like through holes which are sequentially distributed forwards and backwards are formed in the metal gas diffusion layer, each funnel-like through hole is formed by connecting a head table body and a skirt table body, and open holes are formed in the surfaces of the two sides of the metal gas diffusion layer. When the metal gas diffusion layer spreads over the gradually-changed microstructure, gas and liquid water can be controllably guided and accelerated to pass through, the gas is effectively guided to enter the catalyst layer, the liquid water is discharged, the permeability of the metal gas diffusion layer is improved, the current density is improved, and the reaction rate of the battery is improved; the metal gas diffusion layer is manufactured only by combining a conventional 3D printing technology and a laser processing technology, the process is simple and easy to operate, and the metal gas diffusion layer is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of fuel cells, and in particular relates to a metal gas diffusion layer and a manufacturing method and application thereof. Background technique [0002] In recent years, with the rapid development of new energy vehicle technology, fuel cells have gradually become one of the research hotspots in the field of new energy. As a representative of them, proton exchange membrane fuel cells have been greatly applied and promoted. Proton exchange membrane fuel cells have the advantages of zero carbon emission, high energy density, green environmental protection, high efficiency and reliability. However, the chemical reaction of hydrogen oxidation in the proton exchange membrane fuel cell will generate a large amount of liquid water. If it is not discharged in time, it will cause the phenomenon of "water flooding", which will affect the progress of the reaction, and the normal progress of the chemical reaction needs to be main...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88H01M8/1018
CPCH01M4/8807H01M4/8605H01M8/1018H01M2008/1095Y02P70/50Y02E60/50
Inventor 覃文山董非尹必峰刘全解玄陈鑫
Owner JIANGSU UNIV
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