Method for preparing membrane electrode by direct coating method, and membrane electrode prepared by method

A technology of membrane electrode and coating method, which is applied in the direction of circuits, fuel cells, electrical components, etc., to achieve the effect of smooth surface, solve the problem of membrane swelling, and excellent electrochemical performance

Active Publication Date: 2019-09-06
SUZHOU HYDROGINE POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, there is an urgent need in this field for a new method for preparing membrane electrodes, which can solve the problem of membrane swelling in the direct coating process, and the preparation process is simple and can be industrialized.

Method used

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  • Method for preparing membrane electrode by direct coating method, and membrane electrode prepared by method
  • Method for preparing membrane electrode by direct coating method, and membrane electrode prepared by method
  • Method for preparing membrane electrode by direct coating method, and membrane electrode prepared by method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] A method for preparing a membrane electrode comprises the steps of:

[0073] (1) Get a volume of perfluorosulfonic acid proton exchange membrane that is 34cm wide and 1.5 meters long, and slit-coats cathode catalyst slurry on the side without protective film, and the viscosity of said cathode catalyst slurry is 200mpa. s, the solid content is 35%, the dry coating thickness is 9 μm, the coating size is 33 cm wide and 1.45 meters long, and the Pt loading is 0.40 mg / cm after vacuum drying. 2 The cathode side (the first active material catalyst layer);

[0074] (2) The automatic glue applicator is loaded with UV glue, and glue is applied at a distance of 1.2mm from the edge of the cathode surface, the glue application amount is 0.2mL / min, and then a protective film with the same size as the proton exchange membrane is pasted on the cathode surface, and the UV ultraviolet rays Irradiation curing, the position of the glue is as figure 1 As shown, it can be seen from the fig...

Embodiment 2

[0078] A method for preparing a membrane electrode comprises the steps of:

[0079] (1) get a volume of perfluorosulfonic acid proton exchange membranes that are 34cm wide and 1.5 meters long, gravure-coated PtM / C cathode catalyst slurry on the side without protective film, and the viscosity of the cathode catalyst slurry is 50mpa.s, solid content of 20%, coating dry thickness of 8μm, coating size of 30cm in width and 1.45m in length, and vacuum drying to obtain a Pt loading of 0.20mg / cm 2 the cathode side;

[0080] (2) The automatic glue applicator is loaded with UV glue, and the glue is dispensed at a distance of 2.0mm from the edge of the cathode surface, the amount of glue applied is 1.0mL / min, and then a protective film of the same size as the proton exchange membrane is pasted on the cathode surface, and UV is cured ;

[0081] (3) adopting a vacuum pump to vacuumize the interlayer gap between the cathode surface and the protective film in step (2), so that the vacuum d...

Embodiment 3

[0084] The difference from Example 1 is that the amount of glue applied in step (2) is 0.05mL / min.

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Abstract

The invention relates to a method for preparing a membrane electrode by a direct coating method, and the membrane electrode prepared by the method. The method comprises the steps of (1) bonding a protective membrane on one side of a proton exchange membrane with a first active substance catalyst layer; (2) vacuumizing an interlayer gap between the first active substance catalyst layer and the protective membrane in the step (1); and (3) preparing a second active material catalyst layer on the other side of the proton exchange membrane. When the second active material catalyst layer is prepared, the protective membrane is bonded to one side of the proton exchange membrane with the first active material catalyst layer, and the protective membrane and the proton exchange membrane have an acting force by vacuumizing, so that the phenomenon of membrane swelling can be effectively prevented.

Description

technical field [0001] The invention belongs to the field of fuel cell preparation technology, and in particular relates to a method for preparing a membrane electrode by a direct coating method and the prepared membrane electrode. Background technique [0002] Fuel cells have the advantages of environmental friendliness, high energy density, fast start-up at room temperature, and high reliability. Compared with other fuel cells, the operating temperature of proton exchange membrane fuel cells is relatively low, and it is suitable for use as electric vehicles and portable power sources. The membrane electrode includes a catalyst layer, a diffusion layer and a proton exchange membrane, which provide continuous channels for protons, electrons, reaction gases and water for the electrochemical reaction of the proton exchange membrane fuel cell. Traditional methods for preparing membrane electrodes include spraying and transfer printing. The spraying method has low efficiency, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1004
CPCH01M8/1004Y02E60/50
Inventor 王秀吴丹乔静范书琼张晓华米诗阳苏建敏朱威
Owner SUZHOU HYDROGINE POWER TECH CO LTD
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