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Appts for preparing catalyst layer for proton exchange film fuel cell

A proton exchange membrane and fuel cell technology, applied in fuel cells, solid electrolyte fuel cells, battery electrodes, etc., can solve the problems of uneven load thickness, waste of catalysts, waste of precious metal catalysts, etc., to improve spraying quality and efficiency, high The effect of motion precision, good spraying effect

Inactive Publication Date: 2005-03-30
XIAMEN UNIV
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  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method that can not only overcome the problems of serious waste of precious metal catalysts, uneven loading thickness, time-consuming, labor-intensive and poor reproducibility existing in the loading technology of the catalytic layer, but also has the advantages of convenient use and reliable performance. , can be applied to the preparation of fuel cell catalytic membrane coatings with different sizes and high reproducibility, and avoid serious waste of catalysts

Method used

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  • Appts for preparing catalyst layer for proton exchange film fuel cell
  • Appts for preparing catalyst layer for proton exchange film fuel cell
  • Appts for preparing catalyst layer for proton exchange film fuel cell

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preparation example Construction

[0032] Preparation of the catalyst ink: a platinum carbon catalyst (60% precious metal content), water and 5% Nafion solution were mixed uniformly in a weight ratio of 9:20:60 to form a catalyst ink mixture. When in use, first heat the heating plate to a predetermined temperature, then add the prepared catalyst ink to the spray gun, and adjust the square wave duty cycle to control the movement and switch of the spray gun according to the size of the spraying required. Since the weight gain of the entire catalytic layer support is very consistent each time the spray gun is sprayed, the catalyst loading capacity in the catalytic layer can be determined by controlling the number of times the spray gun sweeps the catalytic layer support.

[0033] Carbon paper size: 50mm×50mm

[0034] Heating table size: 600mm×600mm

[0035] Spray angle: 70 degrees

[0036] Maximum spraying distance: 60mm

[0037] Spray height: 30mm

[0038] Spray gun working pressure: 0.2MPa

[0039] Carrier ...

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Abstract

The fabrication equipment as a loading device relates to fuel cell, catalysis thin membrane, gaseous diffusion layer and procedure of making solid pole. The equipment includes base, frame, column, X-auxiliary girder, X-axis, Y-motor screw rod, heat plate and spraying gun, which is connected to X-motor on X-axis setup at X-auxiliary girder. The screw rod in bearing seat is connected to gearwheel, which is on Y-axis. The heat plate is setup on base. Features of the equipment are: good mechanical stiffness, high kinematic accuracy and good spray-painting effect. Comparing prior art, the equipment has advantages: of saving catalyst of noble metal, even thickness, good repeatability and reliable performance.

Description

technical field [0001] The invention relates to a fuel cell, in particular to a proton exchange membrane fuel cell catalyst thin layer, a gas diffusion layer and a supporting device for the three-dimensional process of electrodes. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a kind of perfluorosulfonic acid type solid polymer as electrolyte, metal or metal black loaded on carbon black as electrocatalyst (mainly platinum or platinum ruthenium alloy), with hydrogen, purification Reformed gas, methanol water solution (DMFC) is used as fuel, air or oxygen is used as oxidant, and the energy in the fuel is directly converted into a new generation of electric energy. [0003] A complete proton exchange membrane fuel cell generally consists of end plates, collector plates, bipolar plates and membrane electrodes (MEA). Compared with other parts of the proton exchange membrane battery, the preparation process of MEA is the most complicated, and at the s...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M8/1004
CPCY02E60/521Y02E60/50
Inventor 廖代伟李俊符显珠林敬东戎华北
Owner XIAMEN UNIV
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