CN114122423A - Preparation method of single-side frame membrane electrode - Google Patents

Preparation method of single-side frame membrane electrode Download PDF

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Publication number
CN114122423A
CN114122423A CN202111210847.9A CN202111210847A CN114122423A CN 114122423 A CN114122423 A CN 114122423A CN 202111210847 A CN202111210847 A CN 202111210847A CN 114122423 A CN114122423 A CN 114122423A
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frame
membrane electrode
membrane
gas diffusion
diffusion layer
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吴力杰
邹渝泉
杨云松
唐军柯
叶思宇
孙宁
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Hongji Chuangneng Technology Guangzhou Co ltd
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Hongji Chuangneng Technology Guangzhou Co ltd
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    • 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
    • H01M8/02—Details
    • H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
    • H01M8/0273—Sealing or supporting means around electrodes, matrices or membranes with sealing or supporting means in the form of a frame
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88—Processes of manufacture
    • H01M4/8825—Methods for deposition of the catalytic active composition
    • H01M4/8864—Extrusion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88—Processes of manufacture
    • H01M4/8875—Methods for shaping the electrode into free-standing bodies, like sheets, films or grids, e.g. moulding, hot-pressing, casting without support, extrusion without support
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Fuel Cell (AREA)

Abstract

The invention relates to the field of fuel cells, in particular to a preparation method of a single-sided frame membrane electrode. The invention improves the production efficiency and reduces the cost, and is more suitable for the scale production of the membrane electrode.

Description

Preparation method of single-side frame membrane electrode
Technical Field
The invention relates to the field of fuel cells, in particular to a preparation method of a single-side frame membrane electrode.
Background
A Catalyst Coated Membrane (CCM) is manufactured by constructing a cathode catalyst layer and an anode catalyst layer on both sides of a proton exchange membrane, respectively, and in a fuel cell, it is responsible for an electrochemical reaction of hydrogen and oxygen to generate water to generate electricity, which is an "engine" of the fuel cell. The mainstream packaging technology of the current fuel cell forms a five-layer assembly by the edge joint of a double-layer frame and a CCM (continuous current module) so as to block the blowby of cathode gas and anode gas of the fuel cell, then a gas diffusion layer is bonded on the frame, and finally a seven-layer membrane electrode is formed. Although the double-layer frame technology has strong universality, the membrane electrode can achieve better sealing performance through simple engineering design on the basis of ensuring the compatibility of glue, but the double-layer frame technology has the defects of large material consumption, low material use efficiency, easy occurrence of air leakage defect points, low lamination alignment precision and the like during large-scale batch production, so that the double-layer frame design has high cost and the quality is difficult to control.
The single-frame membrane electrode structure is compared with the double-frame membrane electrode structure, the single-frame membrane electrode structure only adopts a layer of frame to glue in a specific area to seal the CCM and bond the gas diffusion layer, so that the use amounts of frame materials and adhesives are greatly reduced, and the cost of the membrane electrode is obviously reduced. At present, a single-sided frame membrane electrode is generally prepared by cutting a frame material, dispensing glue on the surface of the cut frame material to bond a CCM, then curing, dispensing glue on a cathode gas diffusion layer and an anode gas diffusion layer respectively, then bonding the two sides of the CCM respectively, and performing hot-pressing curing. However, the CCM is soft, so that the CCM is placed on the frame material subjected to dispensing in an aligned manner, the time consumption is long, the production speed, the production efficiency and the yield are influenced in large-scale production, the curing temperature of the adhesive is high (130-150 ℃), the curing time is long (several minutes to half an hour), and the speed and the efficiency of the large-scale production are also influenced.
Disclosure of Invention
The invention aims to overcome at least one defect (deficiency) of the prior art, provides a preparation method of a single-sided frame membrane electrode, improves the production efficiency, reduces the cost, and is more suitable for the large-scale production of the membrane electrode.
The technical scheme adopted by the invention is to provide a preparation method of a single-side frame membrane electrode, wherein the membrane electrode comprises a catalyst coating membrane, a membrane electrode frame, a first gas diffusion layer and a second gas diffusion layer.
If the catalyst coating film is firstly bonded on the frame of the membrane electrode after dispensing in the bonding process, because the catalyst coating film is thin and soft in material, the alignment operation between the catalyst coating film and the frame of the membrane electrode is difficult, long time is needed, the production efficiency is influenced, and the catalyst coating film is difficult to achieve high alignment precision when being directly aligned with the frame of the membrane electrode, so that air leakage defect points are easy to occur, and the yield is influenced.
Further, the method specifically comprises the following steps:
s1: bonding one side of the catalyst coated membrane with a first gas diffusion layer to form a combined body;
s2: bonding the assembly prepared in the step S1 to one side of the membrane electrode frame to bond the catalyst coated membrane and the first gas diffusion layer to the membrane electrode frame;
s3: and (4) bonding a second gas diffusion layer on the other side of the membrane electrode frame after the assembly is bonded in the step (S2) to obtain the single-side frame membrane electrode.
Further, the method specifically comprises the following steps:
s1: bonding one side of the catalyst coated membrane with a first gas diffusion layer to form a combined body;
s2: and adhering a second gas diffusion layer to the other side of the membrane electrode frame to obtain an assembly of the membrane electrode frame and the second gas diffusion layer.
S3: and (4) bonding the assembly prepared in the step (S1) to the other side of the assembly of the S2 membrane electrode frame and the second gas diffusion layer to obtain the single-side frame membrane electrode.
Further, the catalyst coating film is obtained by coating catalyst slurry on the upper surface and the lower surface of the proton exchange membrane to form a catalyst layer and then drying the catalyst layer; the proton exchange membrane is made of a perfluorinated sulfonic acid resin homogeneous membrane, an enhanced perfluorinated sulfonic acid resin membrane, a hydrocarbon sulfonic acid resin homogeneous membrane and an enhanced hydrocarbon sulfonic acid resin membrane.
Further, the first gas diffusion layer and the second gas diffusion layer completely cover the catalyst-coated membrane.
Preferably, the outer edge dimensions of the first gas diffusion layer and the second gas diffusion layer are not smaller than the outer edge dimensions of the catalyst-coated membrane; the length difference between the catalyst coating film and the first gas diffusion layer and the length difference between the catalyst coating film and the second gas diffusion layer are 0-10 mm, and the width difference is 0-10 mm.
Preferably, in the single-sided frame membrane electrode prepared after bonding, the catalyst coating membrane coincides with the central points of the first gas diffusion layer and the second gas diffusion layer, so that the distance between the long edge of the catalyst coating membrane and the long edges of the first gas diffusion layer and the second gas diffusion layer is 0-5 mm, and the distance between the wide edges is 0-5 mm.
In the technical scheme, the sizes of the first gas diffusion layer and the second gas diffusion layer are not smaller than the size of the catalyst coated membrane, so that the catalyst coated membrane is completely covered, the alignment difficulty is reduced when the catalyst coated membrane is bonded with the first gas diffusion layer, the bonding efficiency is improved, the membrane electrode structure can be stabilized after bonding, the first gas diffusion layer can completely support the catalyst coated membrane, the whole assembly has certain rigidity, the assembly is bonded with the membrane electrode frame more easily, the alignment efficiency and the alignment precision are improved, the second gas diffusion layer can be stably bonded on the other side of the membrane electrode frame, the membrane electrode structure is kept stable and is not easy to deform, and various performances and durability of the membrane electrode are guaranteed.
Preferably, the size of the outer edge of the catalyst coated membrane is not smaller than the size of the inner edge of the frame of the membrane electrode; the length difference between the catalyst coating film and the frame of the membrane electrode is 0-10 mm, and the width difference is 0-10 mm.
Preferably, in the single-sided frame membrane electrode prepared after bonding, the center points of the catalyst coating membrane and the membrane electrode frame are superposed, so that the distance between the long edge of the catalyst coating membrane and the long edge of the membrane electrode frame is 0-5 mm, and the distance between the wide edges is 0-5 mm.
In the technical scheme, the size of the outer edge of the catalyst coating membrane is larger than the size of the inner edge of the frame of the membrane electrode, so that the catalyst coating membrane can be bonded on the frame of the membrane electrode, and although the smaller size difference is kept between the outer edge of the catalyst coating membrane and the inner edge of the frame of the membrane electrode, the catalyst coating membrane is bonded with the first gas diffusion layer to form a combined body, so that the catalyst coating membrane can be accurately aligned in a shorter time when being bonded with the frame of the membrane electrode, bonding materials are saved, the production efficiency is improved, and the production yield is ensured.
Further, the gas diffusion layer is one or more of carbon fiber paper, carbon fiber non-woven fabric or carbon black paper with a microporous structure on the surface, and/or the material of the frame of the membrane electrode is one or more of PI, PET, PEEK, PPS or PEN.
Preferably, the gas diffusion layer is carbon fiber paper or carbon fiber non-woven fabric with a microporous structure on the surface, and comprises various materials of FREUDENBERG GDL, SGL GDL, JNTG GDL and TORAY GDL.
In the technical scheme, the material of the gas diffusion layer has certain rigidity, the frame of the membrane electrode also has rigidity, and the catalyst coating membrane is firstly bonded with the gas diffusion layer, so that the obtained assembly is more easily bonded with the frame of the membrane electrode in an aligned mode.
Further, the catalyst coated membrane and the first gas diffusion layer are bonded by a first adhesive layer; the frame of the membrane electrode is bonded with the second gas diffusion layer through a second adhesive layer; and the assembly is bonded with the frame of the membrane electrode through a third adhesive layer.
Preferably, the material of the first adhesive layer and the second adhesive layer is one or more of a thermosetting adhesive, a pressure-sensitive adhesive or a light-cured adhesive; the third adhesive layer is made of one or more of a thermosetting adhesive, a pressure-sensitive adhesive, a light-curing adhesive, a thermosetting adhesive film or a pressure-sensitive adhesive film.
More preferably, the third adhesive layer is a pressure-sensitive adhesive film. The pressure-sensitive adhesive film is adopted to bond the catalyst coating layer and the first gas diffusion layer, heating to a higher temperature is not needed, the bonding speed is higher, and the production efficiency is further improved.
More preferably, the heat-curable adhesive is THREEBOND 11X-375, and/or the pressure-sensitive adhesive is 3M Fastbond 49, and/or the light-curable adhesive is HENKEL Loctite EA3355, and/or the adhesive film is SHELDAHL A438 adhesive film.
More preferably, the third adhesive layer bonds the assembly and the membrane electrode frame through hot-pressing curing or pressure-sensitive curing; wherein, in the hot-pressing curing process, the hot-pressing temperature is 80-150 ℃, the hot-pressing pressure is 5-60 kN, and the hot-pressing time is 10-180 s, or in the pressure-sensitive curing process, the applied pressure is 5-60 kN, and the pressing time is 10-180 s.
Compared with the prior art, the invention has the beneficial effects that:
(1) the membrane electrode adopts a single-side frame design, can provide a stable gluing effect through a special structure, saves 50 percent of frame materials and 90 percent of bonding materials compared with a double-layer frame design, greatly reduces the material consumption, improves the material use efficiency, does not generate bubbles or other pressing defects in an edge sealing area during pressing, and improves the quality of the membrane electrode;
(2) according to the invention, the catalyst coating film which is thin and soft in material is firstly bonded with the gas diffusion layer, so that the rigidity is improved, the catalyst coating film is not deformed when being bonded with the frame, the catalyst coating film is prevented from shrinking when being bonded, the catalyst coating film is easier to align with the frame of the membrane electrode, the alignment time is greatly reduced, and the alignment precision is ensured; meanwhile, the processes of gluing and aligning the gas diffusion layer are reduced, the production yield is improved, and the method is more suitable for large-scale production.
Drawings
Fig. 1 is a schematic structural diagram of a single-frame membrane electrode according to the present invention.
FIG. 2 is a schematic cross-sectional view of a single-sided frame membrane electrode of the present invention.
FIG. 3 is a schematic cross-sectional view of a single-sided frame membrane electrode of the present invention.
Fig. 4 is a schematic sectional view of the catalyst-coated membranes of examples 1 to 3 of the present invention.
Fig. 5 is a schematic sectional view of a catalyst-coated membrane of example 4 of the present invention.
In the drawings are labeled: a first gas diffusion layer 100; a catalyst coating film 200; a proton exchange membrane 210; a catalyst layer 220; a membrane electrode frame 300; a third adhesive layer 310; a second gas diffusion layer 400.
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 processes used in the following examples are conventional unless otherwise specified.
The materials used in the following examples are commercially available unless otherwise specified.
Wherein, the catalyst coating film is XER350 CCM with the hongji energy creating capability; the first gas diffusion layer and the second gas diffusion layer are both H24CX483 of Freudenberg; the frame of the membrane electrode is made of TEONEX PEN film of Dupont, and the type is Q83 or Q53.
Example 1
As shown in fig. 1 and fig. 2, the single-sided frame membrane electrode of the present embodiment includes a catalyst coated membrane 200, a membrane electrode frame 300, a first gas diffusion layer 100, and a second gas diffusion layer 400, and as shown in fig. 4, the catalyst coated membrane 200 is obtained by coating a catalyst slurry on the upper and lower surfaces of a proton exchange membrane 210 to form a catalyst layer 220 and then drying the catalyst layer 220. The concrete structure is as follows: a catalyst coated film 200 and a first gas diffusion layer 100 are sequentially arranged on one side of the membrane electrode frame 300, the catalyst coated film 200 is adhered to the first gas diffusion layer 100 through a first adhesive layer, and a combined body formed by the catalyst coated film 200 and the first gas diffusion layer 100 is adhered to the membrane electrode frame 300 through a third adhesive layer 310; the other side is a second gas diffusion layer 400, and the membrane electrode frame 300 and the second gas diffusion layer 400 are bonded through a second adhesive layer.
Wherein the outer edge size of the first gas diffusion layer 100 and the second gas diffusion layer 400 is not less than the outer edge size of the catalyst coated membrane 200 so as to completely cover the catalyst coated membrane 200, the length difference between the catalyst coated membrane and the first gas diffusion layer and the second gas diffusion layer can be 0-10 mm, and the width difference can be 0-10 mm, in this embodiment, as shown in fig. 3, the size of the catalyst coated membrane 200 is the same as that of the first gas diffusion layer 100 and the second gas diffusion layer 400, the length difference between the two is 0mm, and the width difference is 0 mm; the outer edge dimension of the catalyst coated membrane 200 is not less than the inner edge dimension of the membrane electrode frame 300, so that the catalyst coated membrane 200 can be adhered to one side of the membrane electrode frame 300, the length difference between the catalyst coated membrane and the membrane electrode frame can be 0-10 mm, the width difference can be 0-10 mm, in this embodiment, the length difference between the catalyst coated membrane 200 and the membrane electrode frame 300 is 3mm, and the width difference is 3mm, that is, the distance between the long edge of the catalyst coated membrane 200 and the long edge of the membrane electrode frame 300 is 1.5mm, the distance between the wide edges is 1.5mm, and the center points of the catalyst coated membrane 200, the membrane electrode frame 300, the first gas diffusion layer 100 and the second gas diffusion layer 400 coincide.
The preparation method of the single-sided frame membrane electrode of the embodiment is to bond one side of the catalyst coated membrane 200 and the first gas diffusion layer 100 to form a combined body, and bond the combined body and the second gas diffusion layer 400 to two sides of the membrane electrode frame 300 respectively to obtain the single-sided frame membrane electrode, and specifically comprises the following steps:
s1: bonding one side of the catalyst coated membrane with a first gas diffusion layer to form a combined body;
s2: bonding the assembly prepared in the step S1 to one side of the membrane electrode frame to bond the catalyst coated membrane and the first gas diffusion layer to the membrane electrode frame;
s3: and (4) bonding a second gas diffusion layer on the other side of the membrane electrode frame after the assembly is bonded in the step (S2) to obtain the single-side frame membrane electrode.
In step S1, the catalyst coated membrane and the first gas diffusion layer are bonded together by a first adhesive layer, the first adhesive layer is made of THREEBOND 11X-375, the hot pressing temperature is 130 ℃, the hot pressing pressure is 50kN, and the hot pressing time is 20S.
In step S2, the assembly is bonded to one side of the frame of the membrane electrode by a third adhesive layer, where the third adhesive layer is a SHELDAHL A438 adhesive film. The third adhesive layer bonds the assembly with the frame of the membrane electrode through hot-pressing solidification; in the hot-pressing curing process, the hot-pressing temperature is 80-120 ℃, the hot-pressing pressure is 20-40 kN, the hot-pressing time is 10-30 s, in the embodiment, the hot-pressing temperature is 120 ℃, the hot-pressing pressure is 40kN, and the hot-pressing time is 30 s.
In step S3, the frame of the membrane electrode and the second gas diffusion layer are bonded together by a second adhesive layer, the material of the second adhesive layer is THREEBOND 11X-375, the hot-pressing temperature is 130 ℃, the hot-pressing pressure is 50kN, and the hot-pressing time is 20S.
Example 2
The structure of the single-sided frame membrane electrode of this embodiment is substantially the same as that of embodiment 1, except that the preparation method of the single-sided frame membrane electrode of this embodiment specifically includes the following steps:
s1: bonding one side of the catalyst coated membrane with a first gas diffusion layer to form a combined body;
s2: bonding a second gas diffusion layer to one side of the frame of the membrane electrode;
s3: and (4) bonding the assembly prepared in the step (S1) to the other side of the frame of the membrane electrode, and bonding the catalyst coated membrane and the first gas diffusion layer to the frame of the membrane electrode to obtain the single-sided frame membrane electrode.
In step S1, the catalyst coated membrane and the first gas diffusion layer are bonded together by a first adhesive layer, the first adhesive layer is made of THREEBOND 11X-375, the hot pressing temperature is 130 ℃, the hot pressing pressure is 50kN, and the hot pressing time is 20S.
In step S2, the assembly is bonded to one side of the frame of the membrane electrode by a third adhesive layer, where the third adhesive layer is a SHELDAHL A438 adhesive film. The third adhesive layer bonds the assembly with the frame of the membrane electrode through hot-pressing solidification; in the hot pressing and curing process of the present embodiment, the hot pressing temperature is 120 ℃, the hot pressing pressure is 40kN, and the hot pressing time is 30 s.
In step S3, the frame of the membrane electrode and the second gas diffusion layer are bonded together by a second adhesive layer, the material of the second adhesive layer is THREEBOND 11X-375, the hot-pressing temperature is 130 ℃, the hot-pressing pressure is 50kN, and the hot-pressing time is 20S.
Example 3
The structure and the manufacturing method of the single-sided frame membrane electrode of this embodiment are substantially the same as those of embodiment 1, except that in step S2 of the manufacturing method of the single-sided frame membrane electrode of this embodiment, the material of the third adhesive layer is 3M Fastbond 49 pressure-sensitive adhesive. The third adhesive layer bonds the assembly with the frame of the membrane electrode through curing; in the pressure-sensitive curing process, the applied pressure is 5-60 kN, and the pressing time is 10-180 s, in the embodiment, in the pressure-sensitive curing process, the applied pressure is 10kN, and the pressing time is 20 s.
Example 4
The single-sided frame membrane electrode of this embodiment has substantially the same structure as that of embodiments 1 and 2, except that, as shown in fig. 5, the catalyst coated membrane 200 is obtained by coating catalyst slurry on the upper and lower surfaces of a proton exchange membrane 210 to form a catalyst layer 220 and then drying the catalyst layer, and the area of the catalyst layer is smaller than that of the catalyst coated membrane, so that the four sides of the catalyst coated membrane are not coated with the catalyst layer. Since the proton exchange membrane is made of an ionomer and can be bonded to the gas diffusion layer after being hot-pressed, in this embodiment, a first adhesive layer is not disposed between the catalyst coated membrane 200 and the first gas diffusion layer 100.
The preparation method of the single-sided frame membrane electrode in this embodiment is substantially the same as that in embodiment 1, except that, in step S1, the catalyst coated membrane and the first gas diffusion layer are bonded by hot pressing, and in the hot pressing bonding process, the hot pressing temperature is 80 to 150 ℃, the hot pressing pressure is 20 to 50kN, and the hot pressing time is 60 to 120S.
Comparative example 1
The structure of the single-sided frame membrane electrode of the present comparative example is basically the same as that of the embodiments 1 and 2, except that the preparation method of the single-sided frame membrane electrode of the present comparative example is that the catalyst coating membrane is firstly bonded to one side of the frame of the membrane electrode to form an assembly, and then the first gas diffusion layer and the second gas diffusion layer are respectively bonded to two sides of the frame of the membrane electrode.
The catalyst coating film is bonded with a membrane electrode frame through an SHELDAHL A438 adhesive film, and the catalyst coating film is bonded with the membrane electrode frame through hot-pressing curing, wherein in the hot-pressing curing process, the hot-pressing temperature is 80-120 ℃, the hot-pressing pressure is 20-40 kN, and the hot-pressing time is 10-30 s; the first gas diffusion layer and the second gas diffusion layer are bonded with the frame of the membrane electrode through THEEBOND 11X-375 under the same bonding conditions as in example 1.
The preparation methods of the single-sided frame membrane electrodes in the embodiments 1 and 2 firstly bond the thin and soft catalyst coating membrane with the gas diffusion layer, the catalyst coating membrane is not deformed when being bonded with the frame, and is easier to align with the frame of the membrane electrode, and the alignment time is greatly reduced, and compared with the comparative example 1, the alignment time is saved by about 60%, so that the preparation time required by the embodiments 1 and 2 is saved by about 10% compared with the time required by the comparative example 1, and the production efficiency is improved, in addition, when the assembly of the embodiments 1 and 2 is aligned with the frame of the membrane electrode, the alignment precision can be ensured, the yield of the comparative example 1 is 98.0% in actual production, and the yield of the embodiments 1 and 2 is 99.5%, and is improved by 1.5%, so that the cost of the single-sided frame membrane electrode can be further reduced in large-scale production.
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 (10)

1. A preparation method of a single-sided frame membrane electrode comprises a catalyst coating membrane, a membrane electrode frame, a first gas diffusion layer and a second gas diffusion layer.
2. The method for preparing the single-frame membrane electrode according to claim 1, which comprises the following steps:
s1: bonding one side of the catalyst coated membrane with a first gas diffusion layer to form a combined body;
s2: bonding the assembly prepared in the step S1 to one side of the membrane electrode frame to bond the catalyst coated membrane and the first gas diffusion layer to the membrane electrode frame;
s3: and (4) bonding a second gas diffusion layer on the other side of the membrane electrode frame after the assembly is bonded in the step (S2) to obtain the single-side frame membrane electrode.
3. The method for preparing the single-frame membrane electrode according to claim 1 or 2, wherein the catalyst coating film is obtained by coating catalyst slurry on the upper and lower surfaces of a proton exchange membrane to form a catalyst layer and then drying the catalyst layer; the proton exchange membrane is made of a perfluorinated sulfonic acid resin homogeneous membrane, an enhanced perfluorinated sulfonic acid resin membrane, a hydrocarbon sulfonic acid resin homogeneous membrane and an enhanced hydrocarbon sulfonic acid resin membrane.
4. The single frame membrane electrode production method according to claim 1 or 2, wherein the first gas diffusion layer and the second gas diffusion layer completely cover the catalyst-coated membrane.
5. The single-sided membrane electrode production method according to claim 4, wherein the outer edge dimensions of the first gas diffusion layer and the second gas diffusion layer are not smaller than the outer edge dimensions of the catalyst-coated membrane; the length difference between the catalyst coating film and the first gas diffusion layer and the length difference between the catalyst coating film and the second gas diffusion layer are 0-10 mm, and the width difference is 0-10 mm.
6. The single frame membrane electrode preparation method according to claim 1 or 2, wherein the outer edge size of the catalyst coated membrane is larger than the inner edge size of the membrane electrode frame; the length difference between the catalyst coating film and the frame of the membrane electrode is 0-10 mm, and the width difference is 0-10 mm.
7. The method for preparing the single-frame membrane electrode according to claim 1 or 2, wherein the gas diffusion layer is one or more of carbon fiber paper, carbon fiber non-woven fabric or carbon black paper with a microporous structure on the surface, and/or the material of the frame of the membrane electrode is one or more of PI, PET, PEEK, PPS or PEN.
8. The single frame membrane electrode preparation method according to claim 1 or 2, wherein the catalyst coated membrane and the first gas diffusion layer are bonded by a first adhesive layer; the frame of the membrane electrode is bonded with the second gas diffusion layer through a second adhesive layer; and the assembly is bonded with the frame of the membrane electrode through a third adhesive layer.
9. The method for preparing a single-frame membrane electrode according to claim 8, wherein the first adhesive layer and the second adhesive layer are made of one or more of a thermosetting adhesive, a pressure-sensitive adhesive or a photo-curing adhesive; the third adhesive layer is made of one or more of a thermosetting adhesive, a pressure-sensitive adhesive, a photo-curing adhesive, a thermosetting adhesive film or a pressure-sensitive adhesive film.
10. The method for preparing a single frame membrane electrode assembly according to claim 9, wherein the third adhesive layer bonds the assembly to the membrane electrode frame by hot-press curing or pressure-sensitive curing; wherein, in the hot-pressing curing process, the hot-pressing temperature is 80-150 ℃, the hot-pressing pressure is 5-60 kN, and the hot-pressing time is 10-180 s, or in the pressure-sensitive curing process, the applied pressure is 5-60 kN, and the pressing time is 10-180 s.
CN202111210847.9A 2021-10-18 2021-10-18 Preparation method of single-side frame membrane electrode Pending CN114122423A (en)

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