Double-roller transfer printing coating device for CCM membrane electrode of hydrogen fuel cell

Abstract

A double-roller transfer printing coating device for a CCM membrane electrode of a hydrogen fuel cell comprises an unwinding mechanism used for unwinding a proton exchange membrane; a first coating head used for coating a first transfer roller with a first catalyst layer; a first transfer roller used for heating the first catalytic layer at a first preset temperature; a first press-fit roller matched with the first transfer roller to transfer the baked first catalyst layer to the surface A of the proton exchange membrane; a protective film winding mechanism used for collecting the protective film stripped from the B surface of the proton exchange film; a second coating head used for coating a second transfer roller with a second catalyst layer; a second transfer roller used for heating the second catalytic layer at a second preset temperature; a second press-fit roller matched with the second transfer roller to transfer the baked second catalyst layer to the B surface of the proton exchange membrane to obtain a CCM membrane electrode; and a winding mechanism used for winding the CCM membrane electrode. The device has the advantages that the catalyst layer can be dried before transfer, and the catalyst layer cannot be taken away during transfer.

Description

technical field [0001] The invention relates to a double-roller transfer 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 supported membrane coating method, which is to first coat the first catalytic layer on one...

AI Technical Summary

Problems solved by technology

[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, or the transfer is incomplete, resulting in incomplete surface morphology of the catalytic layer and uneven thickness distribution of the catalytic layer. problem, this is not allowed

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