Preparation method of CCM for water electrolysis hydrogen production, CCM and membrane electrode

Abstract

The invention relates to the technical field of fuel cell preparation, in particular to a preparation method of a CCM for water electrolysis hydrogen production, the CCM and a membrane electrode, and the preparation method comprises the following steps: carrying out ultrasonic atomization treatment on a proton exchange membrane with a large thickness, fixing the proton exchange membrane by using tension, and preparing the CCM. And then coating catalyst slurry on the surfaces of the two sides of the proton exchange membrane respectively under a heating condition, and drying to form catalyst layers on the surfaces of the two sides of the proton exchange membrane. According to the method, swelling deformation of the proton exchange membrane in the coating process can be avoided, the CCM for water electrolysis hydrogen production can be prepared on a large scale by using common slit coating equipment, and the product quality is guaranteed while the production cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of fuel cell preparation, and more specifically, to a preparation method of CCM for hydrogen production by water electrolysis, CCM and membrane electrode. Background technique [0002] As a green energy with wide sources, zero pollution, and zero carbon emissions, hydrogen energy is an ideal energy source for promoting the clean utilization of traditional fossil energy and promoting the large-scale development of renewable energy. In the next period of time, hydrogen energy will play an important role in my country's industrial carbon reduction process. [0003] According to different hydrogen production methods, hydrogen can be gray hydrogen, blue hydrogen and green hydrogen. Among them, gray hydrogen refers to the hydrogen produced by carbon-based energy sources such as coal, and the production process will emit carbon dioxide; Hydrogen that truly achieves zero carbon emissions. Based on the original in...

AI Technical Summary

Problems solved by technology

[0005] In conventional fuel cell CCMs, the proton exchange membranes used are all ultra-thin reinforced proton exchange membranes, the thickness of which is generally only 8-15 μm, and the reinforcing material can alleviate the damage caused by the solvent on the surface of the proton exchange membrane when coating the slurry. Swelling, while the thickness of the proton exchange membrane currently used in CCM for hydrogen production by water electrolysis is relatively large. When the slurry is directly coated on the surface of the proton exchange membrane, the solvent will cause the proton exchange membrane to swell and wrinkle or curl, resulting in the prepared membrane Electrode performance degradation

When the degree of wrinkling or curling is high, even membrane electrodes cannot be made

Therefore, the current preparation of CCM for hydrogen production by water electrolysis generally adopts methods such as electrochemical deposition, ultrasonic spraying or transfer printing to avoid a large amount of catalyst slurry from directly contacting the proton exchange membrane. higher

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