Preparation method of fuel cell membrane electrode

Abstract

The invention discloses a preparation method of a fuel cell membrane electrode, which comprises the following steps: first catalyst slurry is applied to a side A of a proton exchange membrane by spraying; a transfer medium is coated with second catalyst slurry and dried; the dried transfer medium is attached to the proton exchange membrane spray-coated with the first catalyst slurry, the side, spray-coated with the second catalyst slurry, of the transfer medium faces an uncoated side B of the proton exchange membrane, the side A, spray-coated with the first catalyst slurry, of the proton exchange membrane is covered with a protective film, a heat transfer printing process is adopted, and after hot pressing, the transfer medium is peeled off to obtain a fuel cell membrane electrode. Throughspray coating first and then transfer printing, the problem that it is not easy to turn over and lay a membrane and the proton exchange membrane is easy to roll up in a single ultrasonic spray coating method is avoided, the production efficiency is improved, the problem of high interface resistance between the catalytic layer and the proton exchange membrane in a single transfer printing method is avoided, and the ohmic impedance loss is reduced.

Description

technical field [0001] The invention relates to a preparation method of a membrane electrode of a fuel cell, belonging to the technical field of membrane electrodes of a fuel cell. Background technique [0002] In recent years, Proton Exchange Membrane Fuel Cells (PEMFC), as a new type of clean energy, have attracted worldwide attention due to their low pollution or even non-polluting properties. The membrane electrode (Membrane Electrode Assembly, MEA), the core component of PEMFC, is the main place where redox occurs in fuel cells, and it is also the focus of researchers' research, especially the research on its manufacturing process. [0003] According to the characteristics of different structures, traditional membrane electrode preparation methods can be divided into GDE method (Gas Diffusion Electrode, GDE) and CCM method (Catalyst Coated Membrane, CCM). The so-called GDE method is mainly to coat the catalyst slurry on the gas diffusion layer to form a catalyst layer,...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a method for preparing a fuel cell membrane electrode, which avoids the difficulty of flipping the membrane in the single ultrasonic spraying method and the easy curling of the proton exchange membrane. The problem of improving production efficiency, avoiding the problem of large interface resistance between the catalytic layer and the proton exchange membrane in the single transfer method, and reducing the loss of ohmic impedance

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