Adsorbing and coating method for hydrogen fuel cell CCM membrane electrode
A fuel cell and coating method technology, applied in fuel cells, battery electrodes, circuits, etc., can solve problems such as uneven thickness distribution of the catalytic layer and incomplete surface morphology of the catalytic layer
Active Publication Date: 2019-10-18
SHENZHEN XINYUREN TECH
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[0004] In the above three methods, whether the protective film or release paper is removed, part of the catalytic layer will be taken away more or less, resulting in incomplete surface morphology of the catalytic layer and uneven thickness distribution of the catalytic layer, which is not allowed of
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[0042] See figure 1 , figure 1 Disclosed is an adsorption coating method for a hydrogen fuel cell CCM membrane electrode. The proton exchange membrane used has two sides, one side with a protective film is called side B, and the other side without a protective film is called side A, including Follow the steps below:
[0043] S1, coating the first catalytic layer on the A side of the proton exchange membrane, the first catalytic layer can be mainly composed of Pt / C, and the solvent is the catalytic layer of alcohols, and the alcohols can be methanol, ethanol One or more of , propanol and isopropanol;
[0044] S2. Bake the first catalytic layer at a first predetermined temperature, the first predetermined temperature can be selected between 70 degrees Celsius and 150 degrees Celsius, and the selection of the specific temperature depends on the composition of the first catalytic layer;
[0045] S3, peel off the protective film on the B side of the proton exchange membrane, so ...
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The invention provides an adsorbing and coating method for a hydrogen fuel cell CCM membrane electrode. The adsorbing and coating method comprises the steps: S1, coating a first catalytic layer on thesurface A of a proton exchange membrane; S2, baking the first catalytic layer at a first preset temperature; S3, removing the protective film on the surface B of the proton exchange membrane; S4, adsorbing the surface A of the proton exchange membrane by an adsorption device; S5, coating a second catalytic layer on the surface B of the proton exchange membrane; and S6, maintaining the adsorptionstate of the surface A of the proton exchange membrane and baking the second catalytic layer at a second preset temperature so as to obtain the CCM membrane electrode. The adsorbing and coating methodhas the advantages that the proton exchange membrane of the hydrogen fuel cell on the surfaces A and B of the proton exchange membrane can be coated without the transfer membrane.
Description
technical field [0001] The invention relates to an adsorption coating method and equipment for a CCM (catalyst coated membrane) membrane electrode of a hydrogen fuel cell. [0002] technical background [0003] When coating the catalytic layer on both sides of the hydrogen fuel cell proton exchange membrane, since most of the solvents used in the catalytic layer are alcohols, such as methanol, ethanol, propanol, isopropanol, n-propanol or glycerol etc., but most of the proton exchange membranes currently used are perfluorosulfonic acid membranes. In this way, when the catalyst layer is coated on the proton exchange membrane, the proton exchange membrane will swell due to the presence of alcohol solvents, which will affect the proton exchange. film quality. In order to solve the above-mentioned swelling problem, people currently adopt two different coating methods, one is the protective film coating method, the method is to first coat the first catalytic layer on one side (A ...
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IPC IPC(8): H01M4/88H01M8/1004
CPCH01M4/8828H01M4/8882H01M8/1004Y02E60/50
Inventor 杨志明杨星吴健
Owner SHENZHEN XINYUREN TECH