CCM coating process for realizing swelling resistance by using protective back film

A coating process and protective film technology, which is applied in the field of CCM coating process, can solve the problems of catalytic layer falling and catalyst layer falling off, and achieve the effects of avoiding falling off, reducing adhesion and good peeling effect

Active Publication Date: 2021-04-02
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] According to the above-mentioned technical problems such as the swelling of the proton exchange membrane caused by coating the second surface during the coating process and the drop of the catalytic layer when peeling off, the present invention provides a CCM coating process that uses a protective back film to realize anti-swelling, to solve It solves the problem of swelling and shrinkage of the proton exchange membrane during the continuous coating process, avoids the catalyst layer from falling off and cracks, and the surface of the prepared membrane electrode has high flatness, good uniformity, and excellent electrochemical performance

Method used

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  • CCM coating process for realizing swelling resistance by using protective back film
  • CCM coating process for realizing swelling resistance by using protective back film
  • CCM coating process for realizing swelling resistance by using protective back film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Take 20g ethylene glycol phthalate and dissolve it in 113g ethanol to obtain a solution of 15wt% ethylene glycol phthalate, and apply it evenly with a coating speed of 4m / min and a coating thickness of 80 μm. Spread it on a polyethylene naphthalate film with a thickness of 10 μm, and dry it at 40°C to obtain a temporary protective film of a flexible carrier layer with thermal degradation function, which is ready for use;

[0047] (2) Weigh 15g of Pt / C catalyst particles with a Pt content of 10wt%, 30g of 5wt% perfluorosulfonic acid resin solution and 600g of isopropanol and mix them, stir and disperse at 25°C for 60min at high speed, and use ultrasonic vibration for 10min, Defoaming bubbles to obtain catalyst slurry;

[0048] (3) Weigh 0.5g nano-TiO 2 Place in a glass container, add 455g deionized water and 45.5g isopropanol, stir evenly by magnetic force, and make 0.1wt% nano-TiO 2 Solution, pass into spraying chamber 6, standby;

[0049] (4) if figure 1 As sho...

Embodiment 2

[0052] (1) Take 20g of polyimide and dissolve it in 113g of ethanol to obtain a solution of 15wt% polyimide, and uniformly coat the polyimide with a thickness of 80 μm with a coating speed of 4m / min and a coating thickness of 200 μm. On the ethylene terephthalate film, dry at 40°C to obtain a temporary protective film for the flexible carrier layer with thermal degradation function, and set aside;

[0053] (2) Weigh 10g of Pt / C catalyst particles with a Pt content of 90wt%, 100g of 5wt% perfluorosulfonic acid resin solution and 600g of isopropanol and mix them with high-speed stirring at 25°C for 60min, and use ultrasonic vibration for 10min, Defoaming bubbles to obtain catalyst slurry;

[0054] (3) Weigh 0.5g nano-SiO 2 Place in a glass container, add 249.5g deionized water and 249.5g isopropanol, stir evenly by magnetic force, and prepare 0.1wt% nano-SiO 2 Solution, stored in spray booth 6, for subsequent use;

[0055] (4) if figure 1 As shown, protective films are provi...

Embodiment 3

[0058] (1) Take by weighing 20g epoxy acrylate and dissolve in 113g ethanol, obtain the solution of the epoxy acrylate of 15wt%, be that 4m / min, coating thickness 150 μm process are evenly coated on the thickness of 20 μm poly On the vinyl film, dry at 40°C to obtain a temporary protective film with a flexible carrier layer with UV function, and set aside;

[0059] (2) Weigh 10g of Pt / C catalyst particles with a Pt content of 40wt%, 20g of 5wt% perfluorosulfonic acid resin solution and 500g of isopropanol and mix them with high-speed stirring at 25°C for 60min, and use ultrasonic vibration for 10min, Defoaming bubbles to obtain catalyst slurry;

[0060] (3) Weigh 0.5g nano-Al 2 o 3 Place in a glass container, add 416.25g of deionized water and 83.25g of isopropanol, stir evenly with a magnetic force, and prepare 0.1wt% nano-Al 2 o 3 Solution, stored in spray booth 6, for subsequent use;

[0061] (4) if figure 2 As shown, protective films are provided on both sides of th...

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Abstract

The invention discloses a CCM coating process for realizing swelling resistance by using a protective back film. The process comprises the following steps: coating a first surface of a proton exchangemembrane with a catalyst slurry, and performing drying to form a first catalyst layer; preparing a protective film with a flexible carrier layer, laminating a layer of protective film with the flexible carrier layer on the first surface of the proton exchange membrane containing the first catalyst layer, and laminating the protective film with the proton exchange membrane; coating the second surface of the proton exchange membrane with the catalyst slurry, and performing drying to form a second catalyst layer, so as to obtain a membrane electrode with a temporary protective membrane; finally,carrying out heat treatment or ultraviolet (UV) irradiation on the membrane electrode with the temporary protective film, and stripping the temporary protective layer to obtain the membrane electrode; and if heat treatment is selected, spraying a nano oxide solution on the surface of the first catalyst layer before the first catalyst layer is dried. In the membrane electrode preparation process,the swelling of the proton exchange membrane is effectively avoided, the preparation process is simple, the production efficiency is high, and the battery performance is excellent.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a CCM coating process for realizing anti-swelling by using a protective back film. 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. They 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 generation method in the 21st cen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88B82Y40/00B82Y30/00
CPCH01M4/8828H01M4/8814B82Y30/00B82Y40/00Y02E60/50
Inventor 郝金凯张洪杰邵志刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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