Preparation method of fuel cell membrane electrode

Abstract

A preparation method of a fuel cell membrane electrode comprises the following steps: preparing catalyst slurry: weighing a Pt-based catalyst, dispersing the Pt-based catalyst in a mixed solution of water and an organic solvent, dropwise adding a mixed solution of Nafion and isopropanol while performing ice-bath cooling ultrasonic dispersion, and performing ice-bath cooling ultrasonic dispersion for 0.5-5 hour, cutting the membrane body: cutting the proton exchange membrane and the gas diffusion membrane into required sizes according to the catalytic active area of the membrane electrode to beprepared, reserving 1-10mm for each side, cutting the edge sealing membrane according to the sizes of the cut proton exchange membrane and gas diffusion membrane, fixing the support membrane: adhering the support membrane to the front surface of the cut proton exchange membrane through glue, not performing any treatment on the back surface of the proton exchange membrane, reducing the consumptionof the proton exchange membrane, and after the first hot pressing, enabling the frame membrane and the gas diffusion layer to play a role in supporting and protecting. The problems of swelling, deformation and distortion in the processes of operation, spraying, hot pressing and the like can be effectively avoided.

Description

technical field [0001] The invention relates to the field of fuel cell membrane electrode processing, in particular to a fuel cell membrane electrode preparation method. Background technique [0002] As traditional energy gradually withdraws from the stage of history, hydrogen energy and fuel cells will become emerging energy revolutions have come. As an important part of the hydrogen energy revolution, hydrogen fuel cell technology has become a clean energy technology that countries around the world focus on developing. A fuel cell consists of a bipolar plate and a membrane electrode, where the membrane electrode is the core component of the fuel cell, accounting for about 60% of the cost of the entire fuel cell. The development of high-quality, low-cost membrane electrode preparation process is an important part of the development of hydrogen fuel cells. [0003] At present, there are two main processes for the preparation of membrane electrodes: one is to coat the catal...

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Problems solved by technology

The process is simple and does not require hot pressing, but for the soft proton membrane below 50 microns, the membrane transfer and packaging operation technology is difficult, which is not conducive to mass production, and the consistency of the prepared CCM membrane electrode cannot be effectively guaranteed

[0006] Patent CN CN200810204032.8 discloses a method for preparing proton exchange membrane fuel cell electrodes. First, the catalyst is sprayed on the transfer membrane, and then the anode and cathode catalyst layers are hot-pressed on the proton exchange membrane by two transfer-hot pressing methods. On the membrane, the three-in-one membrane electrode of the proton exchange membrane and the diffusion layer that has completed the catalyst transfer is finally added with a frame for sealing and insulation. This membrane electrode preparation method has the advantages of small interface resistance and large-scale production, but The method undergoes a complex process of multiple transfers

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