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Production method of bipolar membrane electrode

A bipolar membrane and electrode technology, which is applied in the field of low-cost integrated bipolar membrane electrode preparation, can solve difficult problems such as flexible control of proton exchange layer thickness, low integration of fuel cell preparation process, and increased overall system complexity, etc. problems, to achieve lower fixed and variable costs, increased production flexibility, and improved membrane electrode performance

Active Publication Date: 2016-09-07
广东喜玛拉雅氢能科技有限公司
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Problems solved by technology

There are many research reports on the preparation process of each component of the membrane electrode, but the traditional membrane electrode preparation process separates the preparation of the proton exchange membrane layer and the catalytic layer, which increases the overall complexity of the system and uses many preparation devices, making the fuel cell preparation process difficult. Low integration and high cost
Further reducing the overall thickness of MEA to prepare ultra-thin high-performance membrane electrodes has led to the development trend of MEA preparation. The traditional MEA preparation process is difficult to achieve flexible control of the thickness of the proton exchange layer, which restricts the further development of MEA.

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  • Production method of bipolar membrane electrode

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preparation example Construction

[0030] A kind of preparation method of integrated bipolar membrane electrode provided by the present invention, its specific process steps are as follows:

[0031] 1) Preparation of cation exchange resin solution: Mix cation exchange resin material and solvent, dissolve at 100-400°C high temperature to form a uniformly dispersed cation exchange resin solution, wherein, cation exchange resin material:solvent=1:(5-500 ); the cation exchange resin is: perfluorosulfonic acid polymer resin, acid-doped polybenzimidazole polymer resin, etc.

[0032] 2) Preparation of the anode catalyst slurry: the anode catalyst, the cation exchange resin solution and the dispersant are mixed, and after ultrasonic vibration, a uniformly dispersed catalyst slurry is formed. Wherein catalyzer: cation exchange resin solution: dispersant=1: (1-100): (1-300); Described catalyzer is Pt, Ru, Ir, Au, Ni, Co, Zn, Ag or their alloys and oxide.

[0033] 3) Pretreatment of the polymer framework material: soak ...

Embodiment 1

[0043]The perfluorosulfonic acid resin material and the solvent are mixed according to the mass ratio of 1:100, and dissolved at a high temperature of 400°C to form a uniformly dispersed polymer electrolyte slurry. The solvent was prepared according to the mass ratio of isopropanol:water 3:1. Take a part of the polymer electrolyte slurry according to the Pt / C (40%) catalyst:polymer electrolyte slurry:isopropanol mass ratio of 1:10:500, and ultrasonically vibrate for 30 minutes to form a uniform catalyst slurry. Take a 15-micron thick ePTFE membrane as the base frame material, soak it in boiling methanol for half an hour, then soak it in isopropanol solution for 24 hours, and then take it out and spread it on the heating substrate and heat it to 120 degrees. Spray polymer electrolyte slurry on ePTFE to form a viscous proton exchange layer. Next, the catalyst slurry is sprayed on the side of the proton exchange layer to form a tightly bonded anode catalyst layer, and after cool...

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Abstract

The invention discloses a production method of a bipolar membrane electrode. A membrane electrode assembly for a fuel battery is produced from a bipolar polymer ion exchange solution and an organic polymer skeleton material. The production method comprises the following steps: forming a proton exchange layer or an oxyhydrogen ion exchange layer on the organic polymer skeleton material at a certain temperature through directly using a raw material slurry prepared by using a polymer and a solvent according to a certain ratio, mixing the cation exchange solution or anion exchange solution with a certain amount of a catalyst to obtain an anode catalyst slurry or a cathode catalyst slurry in order to make the bipolar membrane electrode assembly formed by the anode catalysis layer / the proton exchange layer / the oxyhydrogen ion exchange layer / a cathode catalysis layer; and combining a diffusion layer and the membrane electrode assembly to form the complete membrane electrode product. The method has the advantages of high integration level, agile operation, low cost and excellent product.

Description

technical field [0001] The invention relates to a low-cost integrated bipolar membrane electrode preparation method, and relates to polymer electrolyte membrane electrodes, membrane electrode preparation techniques and the like in the electrochemical industry. The low-cost integrated bipolar membrane electrode preparation method is suitable for the preparation of the membrane electrode of the polymer electrolyte fuel cell (PEFC). Background technique [0002] Proton exchange membrane fuel cell is a clean and efficient energy conversion unit with excellent performance at low temperature, and has broad development prospects in the fields of vehicle power supply and mobile power station. Membrane electrode (MEA) is the core component of proton exchange membrane fuel cell, and the performance and cost of membrane electrode determine the overall performance and cost of PEMFC to a large extent. There are many research reports on the preparation process of each component of the me...

Claims

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Application Information

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IPC IPC(8): H01M8/1004
CPCH01M8/1004Y02E60/50Y02P70/50
Inventor 梁峰郭晓鸣王利生雷一杰
Owner 广东喜玛拉雅氢能科技有限公司
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