Adsorption coating equipment for CCM electrodes of hydrogen fuel cells
A fuel cell and coating equipment technology, applied in fuel cells, battery electrodes, circuits, etc., can solve problems such as incomplete surface morphology of the catalytic layer and uneven thickness distribution of the catalytic layer
Pending Publication Date: 2019-09-20
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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A piece of adsorption coating equipment for CCM (Catalyst Coated Membrane) electrodes of hydrogen fuel cells includes an unwinding mechanism used for releasing a proton exchange membrane, a first coating head used for coating a surface A of the proton exchange membrane with a first catalytic layer, a first oven used for baking the first catalytic layer at a first predetermined temperature, a protective film winding mechanism used for collecting a protective film removed from a surface B of the proton exchange membrane, an adsorbing device used for absorbing the surface A of the proton exchange membrane to be coated with a second catalytic layer, a second coating head used for coating the surface B of the proton exchange membrane with a second catalytic layer, a second oven used for baking the second catalytic layer at a second predetermined temperature under the adsorbing state of the adsorbing device, and a winding mechanism used for winding a CCM electrode, wherein the adsorbing device releases adsorption to the proton exchange membrane when the second oven stops baking. The equipment has the advantage that the surfaces A and B of the proton exchange membrane of a hydrogen fuel cell are coated without a 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
CPCH01M4/88H01M8/1004Y02E60/50
Inventor 杨志明杨星吴健
Owner SHENZHEN XINYUREN TECH