Protective film for fuel cell membrane electrode and preparation method of protective film

A fuel cell membrane and protective film technology, which can be used in fuel cells, film/sheet adhesives, circuits, etc., can solve the problems of increased peel strength, increased production process and cost, and difficult to directly remove the protective film. , to achieve the effect of saving production processes and costs, and reducing the contact area

Active Publication Date: 2019-08-13
SHENZHEN SHINING AUTOMATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the proton exchange membrane must be coated with catalyst on both sides, requiring two coatings
During the second coating, there must be a protective film to protect the catalyst coating coated for the first time, and the protective film must be easy to remove after heating and baking, so as to prevent the peeling strength from increasing after heating and take away the catalyst coating , and the protective film in the prior art is difficult to remove directly after being heated and baked, and must be removed after a viscosity reduction treatment, which increases the production process and cost

Method used

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  • Protective film for fuel cell membrane electrode and preparation method of protective film
  • Protective film for fuel cell membrane electrode and preparation method of protective film
  • Protective film for fuel cell membrane electrode and preparation method of protective film

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Please refer to figure 1 , the present embodiment provides a method for preparing a protective film for a fuel cell membrane electrode, the method comprising the following steps:

[0033] Step 101: mixing glue, solvent, curing agent and microspheres in a weight ratio of 100:100:1:5-10 and stirring evenly to make an adhesive;

[0034] Step 102: evenly coating the prepared adhesive on the base layer 1;

[0035] Step 103: heating to cure the applied adhesive to form an adhesive layer 2 with microspheres 21;

[0036] Step 104: compound a release film 3 on the surface of the adhesive layer 2 formed.

[0037] Among them, in step 101 of this embodiment, the solvent is ethyl acetate, the glue is acrylic glue, and the microspheres 21 are respectively made of silicon dioxide particles and polymethyl methacrylate materials with a diameter of 3 μm, and are respectively set as shown in Table 1 below. Four sets of examples.

[0038] Table 1

[0039]

[0040]

[0041] Prepa...

Embodiment 2

[0047] In this example, four sets of protective films were prepared using the same preparation method as in Example 1, wherein ethyl acetate was used as the solvent, and polyurethane glue was used as the glue, and the weight ratios of glue, solvent, curing agent, and microspheres in each set of protective films were as follows table 3:

[0048] table 3

[0049] 5 groups 6 groups 7 groups 8 groups polyurethane glue 100g 100g 100g 100g Solvent (ethyl acetate) 100g 100g 100g 100g Hardener 1g 1g 1g 1g 3 micron silica particles 5g 10g 3 Micron PMMA 5g 10g

[0050] Prepare four kinds of adhesives according to the ratio of 5 groups, 6 groups, 7 groups and 8 groups respectively, apply the four groups of adhesives evenly on the base layer 1, and then heat the coated adhesives to cure to form a tape The adhesive layer 2 of the microsphere 21 is compounded with a layer of release film 3 on the surface of the formed a...

Embodiment 3

[0056] In this example, four sets of protective films were prepared using the same preparation method as in Example 1, wherein ethyl acetate was used as the solvent, and acrylic glue was used as the glue, and the weight ratios of glue, solvent, curing agent, and microspheres in each set of protective films were as follows table 5:

[0057] table 5

[0058] 9 groups 10 groups 11 groups 12 groups acrylic glue 100g 100g 100g 100g Solvent (ethyl acetate) 100g 100g 100g 100g Hardener 1g 1g 1g 1g 5 micron silica particles 5g 10g 5 Micron PMMA 5g 10g

[0059] Prepare four kinds of adhesives according to the ratio of 5 groups, 6 groups, 7 groups and 8 groups respectively, apply the four groups of adhesives evenly on the base layer 1, and then heat the coated adhesives to cure to form a tape The adhesive layer 2 of the microsphere 21 is compounded with a release film 3 on the surface of the formed adhesive layer 2 ...

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Abstract

The invention relates to the technical field of fuel cells, in particular to a preparation method of a protective film for a fuel cell membrane electrode. The preparation method comprises the steps ofmixing glue, a solvent, a curing agent and microspheres according to a weight ratio of 100:100:1:(5-10), and uniformly stirring the mixture to prepare an adhesive; uniformly coating a base layer withthe prepared adhesive; heating the base layer to solidify the adhesive used for coating in order to form an adhesive layer with the microspheres; compounding a release film layer on the surface of the formed adhesive layer. The provided protective film is provided with the microspheres attached to the surface of the adhesive layer, and the microspheres form uneven contact points; when the membrane electrode is prepared, the protective film and a proton exchange membrane are in point contact with each other, so that the technical problem is effectively avoided that after baking, the protectivefilm is difficult to peel off or a catalyst with which the proton exchange membrane is coated is taken away when the protective film is peeled off. When the protective film is peeled off, there is noneed to perform viscosity reduction treatment in advance, so that the production processes are simplified and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a method for preparing a protective film for fuel cell membrane electrodes. Background technique [0002] Proton exchange membrane fuel cells have the advantages of low operating temperature, fast start-up, high specific power, simple structure, and convenient operation, and are recognized as the preferred energy source for electric vehicles and stationary power stations. Inside the fuel cell, the proton exchange membrane provides a channel for the migration and transport of protons, so that the protons pass through the membrane from the anode to the cathode, and form a circuit with the electron transfer of the external circuit to provide current to the outside world. [0003] Membrane electrode assembly is the core component of proton exchange membrane fuel cell, and its cost accounts for one-third of the total cost. Currently, there are mainly three methods for the preparat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/30C09J133/04C09J11/04C09J11/08H01M8/1004
CPCC08L2205/02C08L2205/18C09J11/04C09J11/08C09J133/04C09J175/04C09J2203/326C09J2433/00C09J2467/005C09J2467/006C09J7/30C09J2301/122C09J2301/408H01M8/1004C08L33/12C08K7/18Y02E60/50Y02P70/50
Inventor 关敬党
Owner SHENZHEN SHINING AUTOMATION CO LTD
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