CN113736390A - Adhesive for membrane electrode and membrane electrode - Google Patents
Adhesive for membrane electrode and membrane electrode Download PDFInfo
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- CN113736390A CN113736390A CN202111033899.3A CN202111033899A CN113736390A CN 113736390 A CN113736390 A CN 113736390A CN 202111033899 A CN202111033899 A CN 202111033899A CN 113736390 A CN113736390 A CN 113736390A
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- adhesive
- membrane electrode
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- 230000001070 adhesive effect Effects 0.000 title claims abstract description 250
- 239000000853 adhesive Substances 0.000 title claims abstract description 247
- 239000012528 membrane Substances 0.000 title claims abstract description 95
- 239000003504 photosensitizing agent Substances 0.000 claims abstract description 40
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical class N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910021645 metal ion Inorganic materials 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims abstract description 4
- 238000000016 photochemical curing Methods 0.000 claims description 26
- 239000003054 catalyst Substances 0.000 claims description 18
- 238000009792 diffusion process Methods 0.000 claims description 16
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 13
- BTVVNGIPFPKDHO-UHFFFAOYSA-K cerium(3+);octadecanoate Chemical compound [Ce+3].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O BTVVNGIPFPKDHO-UHFFFAOYSA-K 0.000 claims description 13
- 229910052748 manganese Inorganic materials 0.000 claims description 13
- 239000011572 manganese Substances 0.000 claims description 13
- -1 cerium ion Chemical class 0.000 claims description 5
- 229910052684 Cerium Inorganic materials 0.000 claims description 2
- WAEMQWOKJMHJLA-UHFFFAOYSA-N Manganese(2+) Chemical compound [Mn+2] WAEMQWOKJMHJLA-UHFFFAOYSA-N 0.000 claims description 2
- 229910001429 cobalt ion Inorganic materials 0.000 claims description 2
- XLJKHNWPARRRJB-UHFFFAOYSA-N cobalt(2+) Chemical compound [Co+2] XLJKHNWPARRRJB-UHFFFAOYSA-N 0.000 claims description 2
- 229910001437 manganese ion Inorganic materials 0.000 claims description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 39
- 150000003254 radicals Chemical class 0.000 abstract description 25
- 239000000654 additive Substances 0.000 abstract description 20
- 239000000446 fuel Substances 0.000 abstract description 16
- 239000002516 radical scavenger Substances 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 9
- 229940123457 Free radical scavenger Drugs 0.000 abstract description 8
- 230000015556 catabolic process Effects 0.000 abstract description 5
- 238000006731 degradation reaction Methods 0.000 abstract description 5
- 238000004132 cross linking Methods 0.000 abstract description 4
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical class [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 abstract 1
- 239000002313 adhesive film Substances 0.000 description 144
- 230000000052 comparative effect Effects 0.000 description 32
- 238000006243 chemical reaction Methods 0.000 description 29
- 239000011521 glass Substances 0.000 description 24
- 239000000126 substance Substances 0.000 description 24
- 229910021642 ultra pure water Inorganic materials 0.000 description 24
- 239000012498 ultrapure water Substances 0.000 description 24
- 238000005406 washing Methods 0.000 description 24
- 230000004580 weight loss Effects 0.000 description 24
- 239000000243 solution Substances 0.000 description 21
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 19
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 19
- 230000001678 irradiating effect Effects 0.000 description 13
- 229910001868 water Inorganic materials 0.000 description 13
- 238000005303 weighing Methods 0.000 description 13
- 238000001035 drying Methods 0.000 description 12
- 108010025899 gelatin film Proteins 0.000 description 12
- 238000002156 mixing Methods 0.000 description 12
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 238000001723 curing Methods 0.000 description 11
- 239000007789 gas Substances 0.000 description 11
- 238000001291 vacuum drying Methods 0.000 description 11
- 230000000996 additive effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 5
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 4
- 239000011259 mixed solution Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910000357 manganese(II) sulfate Inorganic materials 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000003848 UV Light-Curing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium nitrate Inorganic materials [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229910001448 ferrous ion Inorganic materials 0.000 description 1
- 229920006158 high molecular weight polymer Polymers 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical group [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012536 packaging technology Methods 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/46—Polymerisation initiated by wave energy or particle radiation
- C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
- C08F2/50—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light with sensitising agents
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1004—Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention relates to the field of fuel cells, in particular to an adhesive for a membrane electrode and a membrane electrode, wherein the adhesive for the membrane electrode comprises a light-cured adhesive body and an organic photosensitizer, the organic photosensitizer is one or more mixtures of metal phthalocyanine complexes containing metal ions and/or one or more mixtures of stearates containing metal ions, and the organic photosensitizer added in the adhesive can promote crosslinking and curing of the adhesive, improve the curing efficiency of the adhesive, and can be used as a free radical scavenger to eliminate free radicals generated in the operation process of the fuel cell so as to slow down the degradation of the adhesive and avoid the influence of the addition of various additives with single functions on the bonding performance of the adhesive.
Description
Technical Field
The invention relates to the field of fuel cells, in particular to an adhesive for a membrane electrode and the membrane electrode.
Background
The fuel cell is an assembly of dozens to hundreds of membrane electrodes, the membrane electrodes are hearts of a fuel cell stack, the performance and the service life of the membrane electrodes determine the service condition and the service life of the fuel cell, and the whole cell cannot work as long as any one membrane electrode is damaged and leaks in the running process of the cell. The membrane electrode is used as a core component of the fuel cell and mainly comprises an anode gas diffusion layer, an anode catalyst layer, a proton exchange membrane, a cathode catalyst layer and a cathode gas diffusion layer. The current mainstream packaging method of the membrane electrode is a double-side frame packaging method, firstly, an anode catalyst layer and a cathode catalyst layer are respectively coated on two sides of a proton exchange membrane to prepare a catalyst coating membrane with a three-layer structure, then, the edge of the catalyst coating membrane is bonded and sealed with the edges of two side frames through an adhesive to form a five-layer assembly, and finally, two gas diffusion layers are bonded with the side frames through the adhesive respectively to form a seven-layer membrane electrode. In the prior art, a membrane electrode adopting a unilateral frame packaging technology is also available, but no matter a membrane electrode with a bilateral frame structure or a membrane electrode with a unilateral frame structure is prepared, an adhesive is required. The adhesive not only has the function of bonding and fixing in the membrane electrode, but also has the function of sealing, and prevents the damage and air leakage of a catalyst coating membrane in the operation process of the fuel cell, so that the bonding property and the stability of the adhesive have great influence on the performance and the service life of the membrane electrode.
The adhesive composition is generally a high molecular weight polymer. In the operation process of the fuel cell, hydrogen and oxygen generate hydrogen peroxide under the action of the platinum catalyst, the hydrogen peroxide reacts with metal ion impurities in the membrane electrode to generate free radicals, so that high molecular chains of the adhesive are attacked, the adhesive is degraded to lose efficacy, and the air tightness of the membrane electrode is reduced.
Several techniques have been developed for using additives in the active regions of the membrane electrode layers, which additives scavenge the hydrogen peroxide and free radicals produced during the reaction. However, since the environments of the active region and the bonding region of the membrane electrode are different, the manner in which these additives are present is different, and the diffusion rate and the drain rate of the additives added to the active region are high, it is difficult to protect the membrane electrode for a long time, and it is difficult to greatly improve the life of the fuel cell. Chinese patent "an adhesive for membrane electrode and membrane electrode" (publication No. CN112375529A, published: 2021.02.19) discloses an adhesive, in which a radical scavenger is added in the adhesive, so that the membrane electrode is not easy to degrade and lose efficacy, and the service life of the membrane electrode is prolonged. However, such radical scavenger can only play a single role in scavenging radicals, and if other properties of the adhesive are desired to be optimized, other additives need to be added, but when the type or amount of the additive is too large, the cost of the membrane electrode is increased, and the adhesive property of the adhesive is also affected.
Disclosure of Invention
The invention aims to overcome at least one defect (deficiency) of the prior art and provides an adhesive for a membrane electrode and a membrane electrode, wherein an organic photosensitizer added in the adhesive can promote the crosslinking and curing of the adhesive, improve the curing efficiency of the adhesive, and can be used as a free radical scavenger to eliminate free radicals generated in the operation process of a fuel cell so as to slow down the degradation of the adhesive and avoid the influence of adding various additives with single functions on the bonding performance of the adhesive.
The invention adopts the technical scheme that the invention provides an adhesive for a membrane electrode, and a light-cured adhesive for the membrane electrode, which is characterized by comprising a light-cured adhesive body and an organic photosensitizer, wherein the organic photosensitizer is one or more mixtures of metal phthalocyanine complexes containing metal ions, and/or one or more mixtures of metal ion stearate.
In the operation process of the fuel cell, hydrogen and oxygen generate hydrogen peroxide under the action of a platinum catalyst in a catalyst layer, the hydrogen peroxide reacts with metal ion impurities in a membrane electrode to generate free radicals (as shown in formula 1), the free radicals attack a polymer chain of an adhesive to degrade and lose effectiveness, the air tightness of the membrane electrode is reduced, and an intermediate or a product generated by degradation may poison the catalyst layer and further degrade a proton exchange membrane, so that the performance and the service life of the membrane electrode are influenced.
Formula 1:
Formation of H2O2：
H2→2H·(via Pt catalyst)
H·+O2(diffused through PEM)→HOO·
HOO·+H·→H2O2(which can diffuse into PEM)
or
2H++O2+2e→H2O2
Generation of free radical：
H2O2+M2+(Fe2+，Cu2+，etc)→M3++·OH+OH-
M3++HO2 -→M2++HOO·
·OII+H2O2→H2O+HOO·
in the technical scheme, the organic photosensitizer added into the photocuring adhesive can play a role of a free radical scavenger, can scavenge and eliminate free radicals generated in the operation process of a fuel cell, reduce and slow down the degradation of the adhesive in the operation of a membrane electrode, and simultaneously improve the curing efficiency of the photocuring adhesive; in the preparation process of a membrane electrode, after an adhesive of the technical scheme is coated on a bonding part, under the irradiation of ultraviolet light, an organic photosensitizer absorbs the ultraviolet light to generate active free radicals or cations, the crosslinking curing reaction of high polymers of an adhesive body is promoted, the curing speed of the adhesive is accelerated, the organic photosensitizer is still remained in the adhesive for sealing after curing, and the organic photosensitizer can still keep activity, and can be used as a free radical trapping agent in the operation process of a fuel cell to trap and eliminate free radicals generated in an active area and diffused to the bonding part, so that other metal ions do not need to be additionally introduced to trap the free radicals, and the effect that one additive has two optimized functions is realized.
Further, the metal ion is one or more of cerium ion, manganese ion or cobalt ion. The use of these metal ions enables radical trapping to be more effective.
Preferably, the organic photosensitizer is one or a mixture of manganese phthalocyanine and cerium stearate.
Furthermore, the addition amount of the organic photosensitizer is 0.1-10% of the mass of the adhesive body.
Preferably, the addition amount of the organic photosensitizer is 1-5% of the mass of the adhesive body.
Although theoretically, the more the additive is added, the more the optimization effect is obvious, when the additive is added, the preparation cost of the membrane electrode is increased, and the bonding performance of the adhesive is also affected, therefore, in the technical scheme, the addition amount of the organic photosensitizer is kept in a certain range to ensure the bonding performance of the adhesive, and meanwhile, the addition amount can also ensure that the organic photosensitizer still has the organic photosensitizer which keeps certain activity as a free radical trapping agent in the adhesive after promoting the photocuring of the adhesive, so that the photocuring speed and stability of the adhesive are improved, and further, the production efficiency and the service life of the membrane electrode are improved.
The invention also provides a membrane electrode, which comprises a frame and a membrane electrode body, wherein the frame and the membrane electrode body are bonded through an adhesive, the membrane electrode body comprises an anode gas diffusion layer, a proton exchange membrane and a cathode gas diffusion layer which are sequentially bonded and laminated through the adhesive, the proton exchange membrane is coated with an anode catalyst layer on one side of the anode gas diffusion layer, and is coated with a cathode catalyst layer on the other side of the anode gas diffusion layer, and the adhesive is the photocuring adhesive for the membrane electrode.
Compared with the prior art, the invention has the beneficial effects that:
the organic photosensitizer added into the photocuring adhesive body can promote the photocuring of the adhesive and improve the production efficiency, can still keep certain activity after photocuring, can be used as a free radical trapping agent to trap and eliminate generated free radicals in the operation process of a fuel cell, and can reduce the degradation of the photocuring adhesive due to the attack of the free radicals, thereby prolonging the service life of a membrane electrode; the invention adopts the specific organic photosensitizer, can realize the effect that one additive has two optimized functions, does not need to add a plurality of additives with single function, and avoids the reduction of the bonding performance and the sealing performance of the adhesive caused by the plurality of additives contained in the adhesive.
Drawings
FIG. 1 is a graph showing the adhesion properties of a photocurable adhesive for a membrane electrode according to the present invention.
Fig. 2 is a schematic structural diagram of embodiment 9 of the present invention.
Detailed Description
The drawings are only for purposes of illustration and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The experimental procedures used in the following examples are all conventional procedures unless otherwise specified.
Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
Example 1
The embodiment provides a photo-curing adhesive for a membrane electrode, which consists of a photo-curing adhesive body and an organic photosensitizer, wherein the photo-curing adhesive body is a UV (ultraviolet) light-curing adhesive HENKEL Loctite EA3355, the organic photosensitizer is manganese phthalocyanine, the addition amount of the organic photosensitizer accounts for 1% of the mass fraction of the adhesive body, and the photo-curing adhesive for the membrane electrode is prepared by uniformly mixing the photo-curing adhesive body and the organic photosensitizer.
The adhesive prepared in this example was tested for cure efficiency by the following method:
placing the adhesive prepared in the embodiment in a watch glass, after the adhesive is leveled on the bottom surface of the watch glass, irradiating the adhesive with UV light with the wavelength of 405nm to completely cure the adhesive, and recording the UV irradiation time required when the adhesive is completely cured in Table 1; and after the adhesive is completely cured, obtaining an adhesive film, washing residual substances on the surface of the adhesive film by using a large amount of ultrapure water, drying the washed adhesive film at 80 ℃ in vacuum overnight to fully remove water in the adhesive film, and then taking out the adhesive film for later use after the adhesive film is cooled to room temperature.
The adhesive prepared in this example was tested for stability by the following method:
the gel film was weighed out to an initial weight of 1.5368 g and placed in a 100ml beaker, and 30ml of 10% H2O2And 0.8179 g of freshly prepared 0.1% FeSO were weighed in4The solution was added to a beaker (mixing the Fe in solution in the beaker)2+The concentration of 10ppm), placing the beaker in a constant temperature environment of 90 ℃ for reaction for 3 hours, taking out the adhesive film after the reaction is finished, and washing the adhesive film with a large amount of ultrapure water for multiple times to remove H on the surface of the adhesive film2O2And Fe2+And (3) waiting for residual substances, then carrying out vacuum drying on the adhesive film at 80 ℃ overnight, weighing the mass of the adhesive film to obtain a final weight value, calculating the weight loss ratio of the adhesive film according to the initial weight value and the final weight value, and recording the weight loss ratio in table 2.
Example 2
This example provides a photocurable adhesive for a membrane electrode, which is substantially the same as example 1 except that manganese phthalocyanine is added in an amount of 2% by mass based on the mass of the bulk of the adhesive.
The adhesive prepared in this example was tested for cure efficiency by the following method:
placing the adhesive prepared in the embodiment in a watch glass, after the adhesive is leveled on the bottom surface of the watch glass, irradiating the adhesive with UV light with the wavelength of 405nm to completely cure the adhesive, and recording the UV irradiation time required when the adhesive is completely cured in Table 1; and after the adhesive is completely cured, obtaining an adhesive film, washing residual substances on the surface of the adhesive film by using a large amount of ultrapure water, drying the washed adhesive film at 80 ℃ in vacuum overnight to fully remove water in the adhesive film, and then taking out the adhesive film for later use after the adhesive film is cooled to room temperature.
The adhesive prepared in this example was tested for stability by the following method:
the gel film was weighed out to an initial weight of 1.3721 g and placed in a 100ml beaker, and 30ml of 10% H2O2And 0.8179 g of freshly prepared 0.1% FeSO were weighed in4The solution was added to a beaker (mixing the Fe in solution in the beaker)2+The concentration of 10ppm), placing the beaker in a constant temperature environment of 90 ℃ for reaction for 3 hours, taking out the adhesive film after the reaction is finished, and washing the adhesive film with a large amount of ultrapure water for multiple times to remove H on the surface of the adhesive film2O2And Fe2+And (3) waiting for residual substances, then carrying out vacuum drying on the adhesive film at 80 ℃ overnight, weighing the mass of the adhesive film to obtain a final weight value, calculating the weight loss ratio of the adhesive film according to the initial weight value and the final weight value, and recording the weight loss ratio in table 2.
Example 3
This example provides a photocurable adhesive for a membrane electrode, which is substantially the same as example 1 except that manganese phthalocyanine is added in an amount of 5% by mass based on the mass of the bulk of the adhesive.
The adhesive prepared in this example was tested for cure efficiency by the following method:
placing the adhesive prepared in the embodiment in a watch glass, after the adhesive is leveled on the bottom surface of the watch glass, irradiating the adhesive with UV light with the wavelength of 405nm to completely cure the adhesive, and recording the UV irradiation time required when the adhesive is completely cured in Table 1; and after the adhesive is completely cured, obtaining an adhesive film, washing residual substances on the surface of the adhesive film by using a large amount of ultrapure water, drying the washed adhesive film at 80 ℃ in vacuum overnight to fully remove water in the adhesive film, and then taking out the adhesive film for later use after the adhesive film is cooled to room temperature.
The adhesive prepared in this example was tested for stability by the following method:
the gel film was weighed out to an initial weight of 1.5902 g and placed in a 100ml beaker, and 30ml of 10% H2O2And 0.8179 g of freshly prepared 0.1% FeSO were weighed in4The solution was added to a beaker (mixing the Fe in solution in the beaker)2+The concentration of 10ppm), placing the beaker in a constant temperature environment of 90 ℃ for reaction for 3 hours, taking out the adhesive film after the reaction is finished, and washing the adhesive film with a large amount of ultrapure water for multiple times to remove H on the surface of the adhesive film2O2And Fe2+And (3) waiting for residual substances, then carrying out vacuum drying on the adhesive film at 80 ℃ overnight, weighing the mass of the adhesive film to obtain a final weight value, calculating the weight loss ratio of the adhesive film according to the initial weight value and the final weight value, and recording the weight loss ratio in table 2.
Example 4
This example provides a photocurable adhesive for a membrane electrode, which is substantially the same as example 1 except that manganese phthalocyanine is added in an amount of 10% by mass based on the mass of the bulk of the adhesive.
The adhesive prepared in this example was tested for cure efficiency by the following method:
placing the adhesive prepared in the embodiment in a watch glass, after the adhesive is leveled on the bottom surface of the watch glass, irradiating the adhesive with UV light with the wavelength of 405nm to completely cure the adhesive, and recording the UV irradiation time required when the adhesive is completely cured in Table 1; and after the adhesive is completely cured, obtaining an adhesive film, washing residual substances on the surface of the adhesive film by using a large amount of ultrapure water, drying the washed adhesive film at 80 ℃ in vacuum overnight to fully remove water in the adhesive film, and then taking out the adhesive film for later use after the adhesive film is cooled to room temperature.
The adhesive prepared in this example was tested for stability by the following method:
the gel film was weighed out to an initial weight of 1.2945 g and placed in a 100ml beaker, and 30ml of 10% H2O2And weighing 08179 g freshly prepared 0.1% FeSO4The solution was added to a beaker (mixing the Fe in solution in the beaker)2+The concentration of 10ppm), placing the beaker in a constant temperature environment of 90 ℃ for reaction for 3 hours, taking out the adhesive film after the reaction is finished, and washing the adhesive film with a large amount of ultrapure water for multiple times to remove H on the surface of the adhesive film2O2And Fe2+And (3) waiting for residual substances, then carrying out vacuum drying on the adhesive film at 80 ℃ overnight, weighing the mass of the adhesive film to obtain a final weight value, calculating the weight loss ratio of the adhesive film according to the initial weight value and the final weight value, and recording the weight loss ratio in table 2.
Example 5
This example provides a photocurable adhesive for a membrane electrode, which is substantially the same as example 1 except that the organic photosensitizer is cerium stearate.
The adhesive prepared in this example was tested for cure efficiency by the following method:
placing the adhesive prepared in the embodiment in a watch glass, after the adhesive is leveled on the bottom surface of the watch glass, irradiating the adhesive with UV light with the wavelength of 405nm to completely cure the adhesive, and recording the UV irradiation time required when the adhesive is completely cured in Table 1; and after the adhesive is completely cured, obtaining an adhesive film, washing residual substances on the surface of the adhesive film by using a large amount of ultrapure water, drying the washed adhesive film at 80 ℃ in vacuum overnight to fully remove water in the adhesive film, and then taking out the adhesive film for later use after the adhesive film is cooled to room temperature.
The adhesive prepared in this example was tested for stability by the following method:
the gel film was weighed out to an initial weight of 1.5943 g and placed in a 100ml beaker, and 30ml of 10% H2O2And 0.8173 g of freshly prepared 0.1% FeSO were weighed in4The solution was added to a beaker (mixing the Fe in solution in the beaker)2+The concentration of 10ppm), placing the beaker in a constant temperature environment of 90 ℃ for reaction for 3 hours, taking out the adhesive film after the reaction is finished, and washing the adhesive film with a large amount of ultrapure water for multiple times to remove H on the surface of the adhesive film2O2And Fe2+Waiting for residual substances, vacuum drying the adhesive film at 80 deg.C overnight, and weighing the adhesive film to obtain final weight valueThe weight loss ratio of the adhesive film was calculated from the initial weight value and the final weight value and recorded in table 2.
Example 6
This example provides a photocurable adhesive for a membrane electrode, which is substantially the same as example 5 except that cerium stearate is added in an amount of 2% by mass based on the mass of the adhesive bulk.
The adhesive prepared in this example was tested for cure efficiency by the following method:
placing the adhesive prepared in the embodiment in a watch glass, after the adhesive is leveled on the bottom surface of the watch glass, irradiating the adhesive with UV light with the wavelength of 405nm to completely cure the adhesive, and recording the UV irradiation time required when the adhesive is completely cured in Table 1; and after the adhesive is completely cured, obtaining an adhesive film, washing residual substances on the surface of the adhesive film by using a large amount of ultrapure water, drying the washed adhesive film at 80 ℃ in vacuum overnight to fully remove water in the adhesive film, and then taking out the adhesive film for later use after the adhesive film is cooled to room temperature.
The adhesive prepared in this example was tested for stability by the following method:
the gel film was weighed out to an initial weight of 1.3746 g and placed in a 100ml beaker, and 30ml of 10% H2O2And 0.8179 g of freshly prepared 0.1% FeSO were weighed in4The solution was added to a beaker (mixing the Fe in solution in the beaker)2+The concentration of 10ppm), placing the beaker in a constant temperature environment of 90 ℃ for reaction for 3 hours, taking out the adhesive film after the reaction is finished, and washing the adhesive film with a large amount of ultrapure water for multiple times to remove H on the surface of the adhesive film2O2And Fe2+And (3) waiting for residual substances, then carrying out vacuum drying on the adhesive film at 80 ℃ overnight, weighing the mass of the adhesive film to obtain a final weight value, calculating the weight loss ratio of the adhesive film according to the initial weight value and the final weight value, and recording the weight loss ratio in table 2.
Example 7
This example provides a photocurable adhesive for a membrane electrode, which is substantially the same as example 5 except that cerium stearate is added in an amount of 5% by mass based on the mass of the adhesive bulk.
The adhesive prepared in this example was tested for cure efficiency by the following method:
placing the adhesive prepared in the embodiment in a watch glass, after the adhesive is leveled on the bottom surface of the watch glass, irradiating the adhesive with UV light with the wavelength of 405nm to completely cure the adhesive, and recording the UV irradiation time required when the adhesive is completely cured in Table 1; and after the adhesive is completely cured, obtaining an adhesive film, washing residual substances on the surface of the adhesive film by using a large amount of ultrapure water, drying the washed adhesive film at 80 ℃ in vacuum overnight to fully remove water in the adhesive film, and then taking out the adhesive film for later use after the adhesive film is cooled to room temperature.
The adhesive prepared in this example was tested for stability by the following method:
the gel film was weighed out to an initial weight of 1.6144 g and placed in a 100ml beaker, and 30ml of 10% H2O2And 0.8179 g of freshly prepared 0.1% FeSO were weighed in4The solution was added to a beaker (mixing the Fe in solution in the beaker)2+The concentration of 10ppm), placing the beaker in a constant temperature environment of 90 ℃ for reaction for 3 hours, taking out the adhesive film after the reaction is finished, and washing the adhesive film with a large amount of ultrapure water for multiple times to remove H on the surface of the adhesive film2O2And Fe2+And (3) waiting for residual substances, then carrying out vacuum drying on the adhesive film at 80 ℃ overnight, weighing the mass of the adhesive film to obtain a final weight value, calculating the weight loss ratio of the adhesive film according to the initial weight value and the final weight value, and recording the weight loss ratio in table 2.
Example 8
This example provides a photocurable adhesive for a membrane electrode, which is substantially the same as example 5 except that cerium stearate is added in an amount of 10% by mass based on the mass of the adhesive body.
The adhesive prepared in this example was tested for cure efficiency by the following method:
placing the adhesive prepared in the embodiment in a watch glass, after the adhesive is leveled on the bottom surface of the watch glass, irradiating the adhesive with UV light with the wavelength of 405nm to completely cure the adhesive, and recording the UV irradiation time required when the adhesive is completely cured in Table 1; and after the adhesive is completely cured, obtaining an adhesive film, washing residual substances on the surface of the adhesive film by using a large amount of ultrapure water, drying the washed adhesive film at 80 ℃ in vacuum overnight to fully remove water in the adhesive film, and then taking out the adhesive film for later use after the adhesive film is cooled to room temperature.
The adhesive prepared in this example was tested for stability by the following method:
the gel film was weighed out to an initial weight of 1.3754 g and placed in a 100ml beaker, and 30ml of 10% H2O2And 0.8179 g of freshly prepared 0.1% FeSO were weighed in4The solution was added to a beaker (mixing the Fe in solution in the beaker)2+The concentration of 10ppm), placing the beaker in a constant temperature environment of 90 ℃ for reaction for 3 hours, taking out the adhesive film after the reaction is finished, and washing the adhesive film with a large amount of ultrapure water for multiple times to remove H on the surface of the adhesive film2O2And Fe2+And (3) waiting for residual substances, then carrying out vacuum drying on the adhesive film at 80 ℃ overnight, weighing the mass of the adhesive film to obtain a final weight value, calculating the weight loss ratio of the adhesive film according to the initial weight value and the final weight value, and recording the weight loss ratio in table 2.
Example 9
The embodiment provides a membrane electrode, which comprises a frame 2 and a membrane electrode body, wherein the frame 2 and the membrane electrode body are bonded through an adhesive, the membrane electrode body comprises an anode gas diffusion layer 3, a proton exchange membrane 1 and a cathode gas diffusion layer 4 which are sequentially bonded and laminated through the adhesive, the proton exchange membrane 1 is coated with an anode catalyst layer on one side of the anode gas diffusion layer 3, and is coated with a cathode catalyst layer on the other side of the anode gas diffusion layer, and the adhesive is any one of the photocuring adhesives for membrane electrodes prepared in embodiments 1 to 6.
Comparative example 1
The comparative example provides a photo-curable adhesive for a membrane electrode, which is a UV light-curable adhesive HENKEL Loctite EA3355, and does not contain the organic photosensitizer of the present invention.
The adhesive prepared in this comparative example was tested for cure efficiency by the following method:
placing the adhesive prepared in the comparative example in a watch glass, after the adhesive is leveled on the bottom surface of the watch glass, irradiating the adhesive with UV light with the wavelength of 405nm to completely cure the adhesive, and recording the UV irradiation time required when the adhesive is completely cured in Table 1; and after the adhesive is completely cured, obtaining an adhesive film, washing residual substances on the surface of the adhesive film by using a large amount of ultrapure water, drying the washed adhesive film at 80 ℃ in vacuum overnight to fully remove water in the adhesive film, and then taking out the adhesive film for later use after the adhesive film is cooled to room temperature.
The adhesive prepared in this comparative example was tested for stability by the following method:
the gel film was weighed out to an initial weight of 1.5212 g and placed in a 100ml beaker, and 30ml of 10% H2O2And 0.8179 grams of freshly prepared 0.1% FeSO4 solution was weighed into a beaker (Fe in mixed solution in beaker)2+The concentration of 10ppm), placing the beaker in a constant temperature environment of 90 ℃ for reaction for 3 hours, taking out the adhesive film after the reaction is finished, and washing the adhesive film with a large amount of ultrapure water for multiple times to remove H on the surface of the adhesive film2O2And Fe2+Then, the adhesive film was vacuum-dried at 80 ℃ overnight, the mass of the adhesive film was weighed to obtain a final weight value, and the weight loss ratio of the adhesive film was calculated from the initial weight value and the final weight value and recorded in table 2.
Comparative example 2
The comparative example provides a photo-curing adhesive for a membrane electrode, which consists of a photo-curing adhesive body and a free radical scavenger, wherein the photo-curing adhesive body is a UV light curing adhesive HENKEL Loctite EA3355, and the free radical scavenger is Ce (NO)3)3，Ce(NO3)3The addition amount of the photo-curing adhesive is 1 percent of the mass fraction of the adhesive body, and the photo-curing adhesive for the membrane electrode is prepared by uniformly mixing the photo-curing adhesive body and the free radical trapping agent.
The adhesive prepared in this comparative example was tested for cure efficiency by the following method:
placing the adhesive prepared in the comparative example in a watch glass, after the adhesive is leveled on the bottom surface of the watch glass, irradiating the adhesive with UV light with the wavelength of 405nm to completely cure the adhesive, and recording the UV irradiation time required when the adhesive is completely cured in Table 1; and after the adhesive is completely cured, obtaining an adhesive film, washing residual substances on the surface of the adhesive film by using a large amount of ultrapure water, drying the washed adhesive film at 80 ℃ in vacuum overnight to fully remove water in the adhesive film, and then taking out the adhesive film for later use after the adhesive film is cooled to room temperature.
The adhesive prepared in this comparative example was tested for stability by the following method:
the gel film was weighed out to an initial weight of 1.5401 g and placed in a 100ml beaker, and 30ml of 10% H2O2And 0.8179 grams of freshly prepared 0.1% FeSO4 solution was weighed into a beaker (Fe in mixed solution in beaker)2+The concentration of 10ppm), placing the beaker in a constant temperature environment of 90 ℃ for reaction for 3 hours, taking out the adhesive film after the reaction is finished, and washing the adhesive film with a large amount of ultrapure water for multiple times to remove H on the surface of the adhesive film2O2And Fe2+And (3) waiting for residual substances, then carrying out vacuum drying on the adhesive film at 80 ℃ overnight, weighing the mass of the adhesive film to obtain a final weight value, calculating the weight loss ratio of the adhesive film according to the initial weight value and the final weight value, and recording the weight loss ratio in table 2.
Comparative example 3
This comparative example provides a photocurable adhesive for a membrane electrode, which is substantially the same as comparative example 2 except that the radical scavenger is MnSO4。
The adhesive prepared in this comparative example was tested for cure efficiency by the following method:
placing the adhesive prepared in the comparative example in a watch glass, after the adhesive is leveled on the bottom surface of the watch glass, irradiating the adhesive with UV light with the wavelength of 405nm to completely cure the adhesive, and recording the UV irradiation time required when the adhesive is completely cured in Table 1; and after the adhesive is completely cured, obtaining an adhesive film, washing residual substances on the surface of the adhesive film by using a large amount of ultrapure water, drying the washed adhesive film at 80 ℃ in vacuum overnight to fully remove water in the adhesive film, and then taking out the adhesive film for later use after the adhesive film is cooled to room temperature.
The adhesive prepared in this comparative example was tested for stability by the following method:
weighing 1.5462 g in initial weightPlacing the above gelatin film in 100ml beaker, and taking 30ml 10% H2O2And 0.8179 grams of freshly prepared 0.1% FeSO4 solution was weighed into a beaker (Fe in mixed solution in beaker)2+The concentration of 10ppm), placing the beaker in a constant temperature environment of 90 ℃ for reaction for 3 hours, taking out the adhesive film after the reaction is finished, and washing the adhesive film with a large amount of ultrapure water for multiple times to remove H on the surface of the adhesive film2O2And Fe2+And (3) waiting for residual substances, then carrying out vacuum drying on the adhesive film at 80 ℃ overnight, weighing the mass of the adhesive film to obtain a final weight value, calculating the weight loss ratio of the adhesive film according to the initial weight value and the final weight value, and recording the weight loss ratio in table 2.
Comparative example 4
The comparative example provides a light-cured adhesive for a membrane electrode, which consists of a light-cured adhesive body and a photosensitizer, wherein the light-cured adhesive body is a UV light-cured adhesive HENKEL Loctite EA3355, the photosensitizer is conventional photosensitizer 2,4, 6-trimethyl benzoyl phenyl ethyl phosphonate (TPO-L), the addition amount of the TPO-L accounts for 1% of the mass fraction of the adhesive body, and the light-cured adhesive for the membrane electrode is prepared by uniformly mixing the light-cured adhesive body and the photosensitizer.
The adhesive prepared in this comparative example was tested for cure efficiency by the following method:
placing the adhesive prepared in the comparative example in a watch glass, after the adhesive is leveled on the bottom surface of the watch glass, irradiating the adhesive with UV light with the wavelength of 405nm to completely cure the adhesive, and recording the UV irradiation time required when the adhesive is completely cured in Table 1; and after the adhesive is completely cured, obtaining an adhesive film, washing residual substances on the surface of the adhesive film by using a large amount of ultrapure water, drying the washed adhesive film at 80 ℃ in vacuum overnight to fully remove water in the adhesive film, and then taking out the adhesive film for later use after the adhesive film is cooled to room temperature.
The adhesive prepared in this comparative example was tested for stability by the following method:
the gel film was weighed out to an initial weight of 1.3428 g and placed in a 100ml beaker, and 30ml of 10% H2O2And 0.8179 g of fresh material are weighed outAdding the prepared 0.1% FeSO4 solution into a beaker (the concentration of Fe2+ in the mixed solution in the beaker is 10ppm), placing the beaker in a constant temperature environment of 90 ℃ for reaction for 3 hours, taking out the adhesive film after the reaction is finished, and washing the adhesive film for multiple times by using a large amount of ultrapure water to remove H on the surface of the adhesive film2O2And Fe2+And (3) waiting for residual substances, then carrying out vacuum drying on the adhesive film at 80 ℃ overnight, weighing the mass of the adhesive film to obtain a final weight value, calculating the weight loss ratio of the adhesive film according to the initial weight value and the final weight value, and recording the weight loss ratio in table 2.
Comparative example 5
The comparative example provides a light-cured adhesive for a membrane electrode, which comprises a light-cured adhesive body, a photosensitizer and a free radical scavenger, wherein the light-cured adhesive body is a UV light-cured adhesive HENKEL Loctite EA3355, the photosensitizer is TPO-L, the addition amount of the TPO-L accounts for 1% of the mass fraction of the adhesive body, and the free radical scavenger is Ce (NO)3)3，Ce(NO3)3The addition amount of the photo-curing adhesive is 1% of the mass fraction of the adhesive body, and the photo-curing adhesive for the membrane electrode is prepared by uniformly mixing the photo-curing adhesive body, the photosensitizer and the free radical trapping agent.
The curing efficiency test results of examples 1 to 8 and comparative examples 1 to 4 are shown in table 1.
Table 1:
as is clear from Table 1, under the same curing conditions, the curing time of the adhesive containing manganese phthalocyanine or cerium stearate is far longer than that of the adhesive containing Ce (NO) having only a single radical trapping function, except for example 43)3And MnSO4And the adhesive without containing the photosensitizer is short, which shows that the crosslinking curing efficiency of the photocuring adhesive can be effectively promoted by certain addition amount of manganese phthalocyanine and cerium stearate.
The results of the stability tests of examples 1 to 8 and comparative examples 1 to 4 are shown in table 2.
The stability experiment described above was conducted using the Fenton (Fenton) reaction to simulate the generation of free radicals during fuel cell operation. The Fenton (Fenton) reaction generates radicals by reacting hydrogen peroxide with ferrous ions, and in the Fenton (Fenton) reaction, hydroxyl radicals and peroxy radicals can be generated simultaneously as follows:
Fe2++H2O2→Fe3++(OH)-+OH·①
H2O2+Fe3+→Fe2++HO2·+H +②
as is clear from Table 2, the weight loss ratio of the adhesive containing manganese phthalocyanine or cerium stearate and the adhesive containing Ce (NO) added thereto was much smaller than that of the adhesive containing TPO-L having only a single function and the adhesive containing NO photosensitizer3)3Or MnSO4Compared with the adhesive, the adhesive has smaller weight loss ratio, which shows that the manganese phthalocyanine and the cerium stearate can simultaneously play the roles of a photosensitizer and a free radical scavenger, still have certain activity after the adhesive is promoted to be cured, and can capture and eliminate free radicals, thereby improving the chemical stability of the adhesive in a free radical environment.
The photo-curable adhesives of examples 1, 3, 5, and 7 and comparative examples 1 and 5 were used for adhesion test by the following methods:
s1, coating the prepared adhesive on a membrane electrode frame material, covering another frame material to form a frame material-adhesive-frame material structure which is stacked in sequence, and irradiating the adhesive for 20 seconds by adopting UV light with the wavelength of 405nm to completely cure the adhesive to obtain a sample;
s2, the sample prepared in the step S1 is cut into a strip with the width of 2cm, and a universal testing machine is used for testing the peeling strength between two pieces of frame materials to represent the bonding performance of the adhesive.
The peel strength curve of the adhesive is shown in fig. 1, wherein the displacement of the abscissa indicates the length of peeling of the sample, the peel strength of the ordinate indicates the force value required to peel the sample per cm, and at 24mm of the abscissa, the curves correspond to comparative example 1, example 5, example 1, example 7, comparative example 5, and example 3, from top to bottom, in this order.
Comparing examples 1 and 3 with comparative example 1, it can be seen that the addition of 1% manganese phthalocyanine or 1% cerium stearate to the UV light-curable adhesive has substantially no effect on the adhesive properties of the UV light-curable adhesive, but comparing examples 5 and 7 with examples 1 and 3, it can be seen that the adhesive properties of the adhesive tend to gradually decrease as the amount of the additive increases, and therefore, the amount of the additive is preferably not more than 10% by mass of the adhesive body, preferably 1 to 5% by mass; comparative example 5 compared with examples 1, 3, 5, 7 and comparative example 1, the adhesive performance of the adhesive obtained by the method is far lower than that of example 1 with 1% manganese phthalocyanine, example 5 with 1% cerium stearate and comparative example 1 without any additive, and is lower than that of example 7 with 5% cerium stearate, which is only similar to that of example 3 with 5% manganese phthalocyanine, so that it can be known that the adhesive performance of the adhesive is obviously reduced even if the amount of each additive is small by simultaneously adding a plurality of additives with only a single function into the UV light curing adhesive, and the organic photosensitizer added into the adhesive can have the effects of two optimized functions, thereby reducing the influence of the additives on the adhesive performance of the adhesive.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention claims should be included in the protection scope of the present invention claims.
Claims (6)
1. The light-cured adhesive for the membrane electrode is characterized by comprising a light-cured adhesive body and an organic photosensitizer, wherein the organic photosensitizer is one or more mixtures of metal phthalocyanine complexes containing metal ions and/or one or more mixtures of metal stearate containing metal ions.
2. The photocurable adhesive for membrane electrode according to claim 1, wherein said metal ion is one or more of cerium ion, manganese ion or cobalt ion.
3. The photocurable adhesive for membrane electrode according to claim 2, wherein the organic photosensitizer is one or a mixture of manganese phthalocyanine and cerium stearate.
4. The photocurable adhesive for membrane electrode according to claim 1, wherein the amount of the organic photosensitizer added is 0.1 to 10% by mass of the adhesive body.
5. The photocurable adhesive for membrane electrode according to claim 4, wherein the amount of the organic photosensitizer added is 1% to 5% by mass of the adhesive body.
6. A membrane electrode comprises a frame and a membrane electrode body, wherein the frame and the membrane electrode body are bonded through an adhesive, the membrane electrode body comprises an anode gas diffusion layer, a proton exchange membrane and a cathode gas diffusion layer which are sequentially bonded and laminated through the adhesive, the proton exchange membrane is coated with an anode catalyst layer on one side of the anode gas diffusion layer, and is coated with a cathode catalyst layer on the other side of the anode gas diffusion layer, and the membrane electrode is characterized in that the adhesive is the photocuring adhesive for the membrane electrode in any one of claims 1 to 5.
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