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Preparation method of membrane electrode assembly of proton exchange membrane fuel cell

A proton exchange membrane, fuel cell membrane technology, applied in fuel cells, battery electrodes, electrical components, etc., can solve problems such as swelling, membrane shrinkage, and unfavorable scale-up production, and achieve the effect of being suitable for mass production and simple operation.

Inactive Publication Date: 2019-04-05
WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the preparation methods of membrane electrodes can be divided into the indirect method and the direct method according to the different catalyst layer coating process and process. Among them, the direct method has always been regarded as the realization of large-scale, efficient and convenient membrane electrodes. production method, but there are still two problems in this method: (1) when the catalyst slurry is directly coated on the proton exchange membrane, it will cause membrane shrinkage or swelling; (2) the catalyst slurry coating process needs to carry out the proton exchange membrane Heating adsorption, complex process operation, not conducive to scale-up production

Method used

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  • Preparation method of membrane electrode assembly of proton exchange membrane fuel cell
  • Preparation method of membrane electrode assembly of proton exchange membrane fuel cell
  • Preparation method of membrane electrode assembly of proton exchange membrane fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Weigh 0.5g of carbon-supported platinum catalyst (Johnson Matthey Catalyst Hispec9100, UK), then weigh 5g of perfluorosulfonic acid resin solution (DuPont’s perfluorosulfonic acid resin solution DE520), 5g of isopropyl Alcohol, 2.5 g deionized water for ultrasonic dispersion for 30 min.

[0028] (2) Stir at 10,000 rpm for 90 min with a high-speed disperser (Germany IKA Company, T25 digital display type) to obtain catalyst slurry.

[0029] (3) Proton exchange membrane (DuPont NR 212, USA, thickness of proton exchange membrane is about 50μm) placed at the bottom of side a

[0030] One layer of film support body 1 (the thickness of the PET film is 100 μm, and the surface tension coefficient is 45 mN / m), so that the film support body 1 and the side a of the proton exchange membrane are closely attached.

[0031] (4) Coat the catalyst slurry on side b of the proton exchange membrane by screen printing, and dry at 80° C. for about 5 minutes.

[0032] (5) Lay the membran...

Embodiment 2

[0035] (1) Weigh 2g of carbon-supported platinum ruthenium catalyst (Johnson Matthey Catalyst Hispec5000, UK), and then weigh 8g of perfluorosulfonic acid resin solution (perfluorosulfonic acid resin solution DE520 from DuPont, USA), 8 g of methanol, 5 g deionized water was used for ultrasonic dispersion for 30 min.

[0036] (2) Stir at 10,000 rpm for 90 min with a high-speed disperser (Germany IKA Company, T25 digital display type) to obtain catalyst slurry.

[0037] (3) Proton exchange membrane (proton exchange membrane thickness of American Gore company is about 18 μm) a layer of film support 1 (polytetrafluoroethylene film thickness of 200 μm, surface tension coefficient of 18 mN / m) is placed on the bottom of side a, so that the film support 1 and side a of the proton exchange membrane are closely attached.

[0038] (4) Coat the catalyst slurry on side b of the proton exchange membrane with a slot die coater, and dry it at 25° C. for about 30 minutes.

[0039] (5) Lay th...

Embodiment 3

[0042] (1) Weigh 2g of carbon-supported platinum-cobalt alloy catalyst (Pt-Co / C, 46wt% Pt, 6 wt% Co)), and then weigh 8g of perfluorosulfonic acid resin solution (perfluorosulfonic Acid resin solution DE520), 8 g glycerol, 5 g deionized water for ultrasonic dispersion for 30 min.

[0043] (2) Stir at 10,000 rpm for 90 min with a high-speed disperser (Germany IKA Company, T25 digital display type) to obtain catalyst slurry.

[0044] (3) Proton exchange membrane (NR 115 from DuPont, USA, thickness of proton exchange membrane is about 120μm) A layer of film support 1 (polyvinyl chloride film thickness 50μm, surface tension coefficient 40mN / m) is placed on the bottom of side a to make the membrane support Body 1 and side a of the proton exchange membrane are closely attached.

[0045] (4) Coat the catalyst slurry on side b of the proton exchange membrane with a sprayer, and dry it at 95°C for about 5 minutes.

[0046] (5) Lay the membrane support 2 and the side b of the proton e...

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Abstract

The invention discloses a preparation method of a membrane electrode assembly of a proton exchange membrane fuel cell. The preparation method comprises the steps of firstly, attaching a layer of a thin film support body onto one side of a proton exchange membrane, coating catalyst paste on the other side, and performing drying to obtain a catalyst layer; secondly, attaching the thin film support body onto one side of the catalyst layer, and stripping the thin film support body at the other side; thirdly, coating the catalyst paste on the side, and performing drying to obtain the catalyst layer; and removing the remaining thin film support body, thereby obtaining the membrane electrode assembly. By the method, the defects of swelling and deformation of the proton exchange membrane during direct coating of the catalyst paste are effectively overcome, the method has the advantages of simple and rapid process, low production cost and the like, and mass production is easy.

Description

technical field [0001] The invention belongs to the field of fuel cell membrane electrodes, and in particular relates to a preparation method of a proton exchange membrane fuel cell membrane electrode assembly. Background technique [0002] A proton exchange membrane fuel cell is an energy conversion device that can directly convert the chemical energy stored in hydrogen fuel and oxidant into electrical energy through electrochemical reactions. Fuel cells have the characteristics of high energy conversion efficiency and no exhaust emissions, and are considered to be one of the most promising solutions to energy crisis and environmental pollution, especially in transportation such as automobiles, ships and backup power supplies. It is precisely because of these outstanding advantages that the development and application of fuel cell technology has attracted the attention of governments and large companies, and is considered to be the preferred clean and efficient power genera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M8/1004
CPCH01M4/8828H01M4/8882H01M8/1004Y02E60/50Y02P70/50
Inventor 夏丰杰詹明叶东浩杜灵根方晓曦
Owner WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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