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Manufacturing process of high-efficiency and long-life membrane electrodes for proton exchange membrane fuel cells

A proton exchange membrane and fuel cell technology, applied in fuel cells, battery electrodes, sustainable manufacturing/processing, etc., can solve problems such as reducing the service life of membrane electrodes, affecting proton conduction efficiency, and increasing the resistance of proton exchange membranes and catalytic layers , to achieve the effect of improving power generation efficiency, improving proton conduction efficiency, and ensuring water locking ability

Active Publication Date: 2021-11-23
CEMT CO LTD
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  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a high-efficiency and long-life membrane electrode manufacturing process for proton exchange membrane fuel cells, to solve the problem that the platinum black in the catalytic layer proposed in the above background technology will settle for a long time, reduce the service life of the membrane electrode, and increase the proton exchange The resistance between the membrane and the catalytic layer affects the proton conduction efficiency

Method used

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  • Manufacturing process of high-efficiency and long-life membrane electrodes for proton exchange membrane fuel cells

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Effect test

Embodiment 1

[0026] see figure 1 , a kind of embodiment one that the present invention provides: the high-efficiency long-life membrane electrode manufacturing process for proton exchange membrane fuel cell, comprising the following process steps:

[0027] S1. Preparation of carbon powder slurry: prepare according to the ratio of 3:1:2, take three parts of carbon powder, one part of conductive mica powder and one part of perfluorosulfonic acid resin and fully mix them for later use. The toner powder has good conductivity and conduction effect , Conductive mica powder is resistant to high temperature and has high strength. It can be mixed in the carbon powder slurry to improve the strength of the membrane electrode;

[0028] S2. Preparation of catalyst slurry: Prepare according to the ratio of 3:1:1, take three parts of carbon powder, one part of platinum black and one part of perfluorosulfonic acid resin and fully mix them for later use. Platinum black has high activity and good catalytic ...

Embodiment 2

[0035] Embodiment 2: On the basis of Embodiment 1, the difference is: during Y-axis spraying, the spraying machine moves horizontally and uniformly along the Y-axis direction, and the initial distance between the nozzle of the spraying machine and the proton exchange membrane is controlled at 8-12 cm. The multi-directional platform rises at a constant speed with the movement of the sprayer, and the distance between the nozzle of the sprayer and the proton exchange membrane is always controlled at 8-12 cm. The pressure of the sprayer is changed to compensate for the change in distance, and the pressure adjustment accuracy is required to be extremely high. It is simpler to use the height of the multi-directional platform to compensate for the distance between the nozzle of the sprayer and the proton exchange membrane, and the precision is easier to control.

Embodiment 3

[0036] Embodiment 3: On the basis of Embodiment 1, the difference is that when spraying on the Y-axis and X-axis, the multi-directional platform is turned 30-40 degrees along the X direction, and then turned 30-40 degrees along the Y-axis direction. The diversity of mesopores after the surface of the proton exchange membrane is swelled can be sealed through the two-stage direction adjustment of the X-axis and the Y-axis. The spraying machine moves horizontally and uniformly along the Y-axis direction. The initial spacing is controlled at 8-12 cm, the spraying pressure is constant, the multi-directional platform rises at a constant speed with the movement of the sprayer, and the distance between the nozzle of the sprayer and the proton exchange membrane is always controlled at 8-12 cm.

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Abstract

The present invention relates to the technical field of fuel cells, specifically a process for manufacturing high-efficiency and long-life membrane electrodes for proton exchange membrane fuel cells, including the following process steps: S1, preparing carbon powder slurry; S2, preparing catalyst slurry; S3, swelling treatment; S4, catalytic layer pretreatment; S5, forming the catalytic layer, using nano-scale spraying machine one to coat alcohol solution on the proton exchange membrane, so that the surface of the proton exchange membrane swells, forming roughened surface and mesoporous, through nano-scale spraying machine two The carbon powder slurry is coated on the surface of the proton exchange membrane to form a carbon powder layer, and the catalyst slurry is sprayed on the surface of the carbon powder layer, so that the catalyst and the carbon powder are coupled to form a new catalytic layer structure. The invention solves the problem of platinum black sedimentation, improves the application life of the membrane electrode, reduces the interface contact resistance between the catalytic layer and the proton exchange membrane, improves the proton conduction efficiency, and improves the power generation efficiency of the fuel cell membrane electrode.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a high-efficiency and long-life membrane electrode manufacturing process for proton exchange membrane fuel cells. Background technique [0002] The membrane electrode assembly, also known as the membrane electrode, is the key core component of fuel cell power generation. The membrane electrode and the bipolar plates on both sides constitute the basic unit of the fuel cell. For the membrane electrode, it reduces the contact between the catalytic layer and the proton exchange membrane. The interface contact resistance can improve the proton conduction efficiency. [0003] The Chinese invention patent with the publication number CN104979567A discloses a method for preparing the membrane electrode of a proton exchange membrane fuel cell. Two membrane electrode preparation processes, the screen printing process and the ultrasonic spraying process, are used to prepare the electrocat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1004H01M4/88
CPCH01M8/1004H01M4/8828H01M4/886H01M2008/1095Y02E60/50Y02P70/50
Inventor 宋书范李杲周燕李勇
Owner CEMT CO LTD
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