JP2013161557A - Manufacturing method of film-catalyst layer junction and manufacturing apparatus of film-catalyst layer junction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a film-catalyst layer junction capable of reducing problem occurrence such as wrinkle or break of polymer electrolyte film.SOLUTION: A manufacturing method of a film-catalyst layer junction includes the steps of: preparing a polymer electrolyte film; sucking the polymer electrolyte film on the surface of a first porous base, which covers the surface of a suction roll having a first air permeability to transfer the same and which has the air permeability smaller than the first air permeability; and applying catalyst ink to the sucked polymer electrolyte film. The air permeability of the first porous base is preferably 100 sec/100 ml or more and 2000 sec/100 ml or less.

Description

  The present invention relates to a method for manufacturing a membrane-catalyst layer assembly provided in a fuel cell used as a drive power source for mobile devices such as portable electronic devices, automobiles, distributed power generation systems, and household cogeneration systems.

  A fuel cell (for example, a polymer electrolyte fuel cell) generates electric power, heat, and water simultaneously by electrochemically reacting a fuel gas containing hydrogen and an oxidant gas containing oxygen such as air. It is a device to let you.

  A fuel cell is generally configured by stacking a plurality of cells and pressurizing them with fastening members such as bolts and bands. One cell is configured by sandwiching a membrane electrode assembly (hereinafter referred to as MEA: Membrane-Electrode-Assembly) between a pair of plate-like conductive separators.

  The MEA is composed of a polymer electrolyte membrane and a pair of electrode layers disposed on both sides of the polymer electrolyte membrane. One of the pair of electrode layers is an anode electrode, and the other is a cathode electrode. Each of the pair of electrode layers includes a catalyst layer mainly composed of carbon powder carrying a metal catalyst and a porous and conductive gas diffusion layer disposed on the catalyst layer. Here, the assembly of the polymer electrolyte membrane and the catalyst layer is referred to as a membrane-catalyst layer assembly (CCM). When the fuel gas is in contact with the anode electrode and the oxidant gas is in contact with the cathode electrode, an electrochemical reaction occurs, and electric power, heat, and water are generated.

  In the fuel cell configured as described above, the membrane-catalyst layer assembly can be manufactured, for example, as follows.

  First, a first shape retaining film is attached to one surface of the polymer electrolyte membrane. Next, a first catalyst layer is formed on the other surface of the polymer electrolyte membrane. Further, a second shape retaining film is pasted on the first catalyst layer. Further, the first shape-retaining film attached to one surface of the polymer electrolyte membrane is removed, and a second catalyst layer is formed on this one surface. When forming the first catalyst layer and the second catalyst layer, a catalyst ink containing a catalyst and a solvent is printed or applied on the polymer electrolyte membrane (see, for example, Patent Document 1).

  As described above, the technique for producing a membrane-catalyst layer assembly by directly printing or applying a catalyst ink on a polymer electrolyte membrane can extremely reduce the interface resistance between the polymer electrolyte membrane and the catalyst layer. Therefore, it is attracting attention as a method for producing an ideal membrane-catalyst layer assembly.

  In the conventional production method, the polymer electrolyte membrane is usually a very thin member (for example, 20 μm to 50 μm) and is a member that is easily deformed even with a little moisture. There is a problem that wrinkles and pinholes are generated in the molecular electrolyte membrane. Such wrinkles and pinholes are factors that reduce the power generation performance of the fuel cell.

  Patent Document 1 aims to suppress the occurrence of wrinkles and pinholes by pasting a shape-retaining film on the surface of the polymer electrolyte membrane opposite to the surface on which the catalyst ink is applied.

  In Patent Document 2, a roll-to-roll electrolyte membrane is applied while adsorbing to a suction roll side peripheral wall, and the polymer electrolyte membrane is wrinkled or pinholed due to swelling by drying with a suction roll provided with a heating means. It aims to suppress the occurrence of.

  Further, Patent Document 3 adsorbs an object to be coated on a circulating movable body having air permeability, laminates and applies a liquid to the object to be coated adsorbed on the circulating movable body, and points the liquid applied to the coated object. Touch dry.

JP 2002-289207 A JP 2008-027738 A JP 2004-351413 A

  In the manufacturing method according to the technique described in Patent Document 1, the first catalyst layer is attached to the other surface of the polymer electrolyte membrane in a state where the first shape-retaining film is attached to one surface of the polymer electrolyte membrane. As a result, almost no wrinkles or pinholes were generated in the polymer electrolyte membrane. On the other hand, after forming the first catalyst layer, when the second catalyst layer is formed on one surface of the polymer electrolyte membrane using the above-described technique, the polymer electrolyte membrane has a desired allowable level. Excess wrinkles and pinholes occurred.

  Therefore, the manufacturing method according to the technique of Patent Document 1 has a problem that a manufacturing method that appropriately suppresses wrinkles and deflection, has few appearance defects such as pinholes and tears, and is suitable for excellent mass production cannot be obtained. Was.

  The technique described in Patent Document 2 is a manufacturing method different from the technique of Patent Document 1, in which a polymer electrolyte membrane is adsorbed on a suction roll, applied, and dried. In particular, a method is disclosed in which a polymer electrolyte membrane is separated from the suction roll and a cover is installed at a portion where the suction roll is exposed, and suction is performed from the position of the cover.

  However, in Patent Document 2, it is clearly indicated that a balance between the suction pump 1 of the suction roll and the suction pump 2 of the cover is necessary, and further, a clearance is generated between the cover and the suction roll. The suction force of the polymer electrolyte membrane from the suction roll becomes very unstable, and there is a problem that the suppression of wrinkles and pinholes is not stable.

  Further, in the technique described in Patent Document 3, a cylinder having a partition plate is provided inside the circulation moving body, and the suction force to the object to be coated is generated only in the vacuum chamber by dividing the vacuum chamber into the pressurizing chamber. I was letting.

  The object of the present invention is to solve the above-mentioned problems, and to produce a membrane-catalyst layer assembly that can further suppress the occurrence of wrinkles, deflection, pinholes, tears, etc. due to swelling in the polymer electrolyte membrane. It is to provide a method and apparatus thereof.

  The inventors of the present invention have found the following as a result of intensive studies in order to solve the above-described problems of the prior art.

  When the first catalyst layer is formed on the other surface of the polymer electrolyte membrane with the first shape-retaining film attached to one surface of the polymer electrolyte membrane, the polymer electrolyte membrane is almost free from wrinkles and There was no pinhole. On the other hand, after forming the first catalyst layer, when the second catalyst layer is formed on one surface of the polymer electrolyte membrane using the above-described technique, the polymer electrolyte membrane has a desired allowable level. Excess wrinkles and pinholes occurred.

  When the second catalyst layer is formed on one surface of the polymer electrolyte membrane using the technique of Patent Document 1, the second catalyst layer exists in the center of the other surface of the polymer electrolyte membrane. The shape-retaining film is attached only to the peripheral portion of the other surface. However, since the first catalyst layer does not stick to the polymer electrolyte membrane, it is impossible to suppress the occurrence of desired wrinkles and the like when the second catalyst layer is applied and formed.

  Patent Document 2 discloses that the polymer electrolyte membrane is wound when the polymer electrolyte membrane is adsorbed and fixed by sucking the polymer electrolyte membrane to the suction roll with a roll-to-roll, compared to the prior art of Patent Document 1. There is a part that is exposed without being rotated, and the part is covered with a resin cover. Both the cover and the suction roll are sucked by separate pumps to stabilize the adsorption. However, there is a clearance between the resin cover and the exposed part of the suction roll, and suction leakage from the clearance cannot be compensated for by the suction pump from the cover or cover. Since stable adsorption fixation cannot be performed on the roll, generation of wrinkles cannot be suppressed when the catalyst layer is applied and formed.

  Accordingly, the inventors of the present invention have made extensive studies, and as a result, the first porous substrate (for example, a nonwoven sheet having a three-dimensional structure) is adsorbed to one side wall of the suction (suction) roll. And On top of this configuration, the second porous substrate for the carrier sheet (for example, a nonwoven sheet having a three-dimensional structure) and the polymer electrolyte membrane move on the first porous substrate on the suction roll.

  That is, since the first porous substrate is present in the conventional exposed portion, suction leakage as in the conventional case can be prevented, and the second porous substrate and the polymer electrolyte membrane are present in portions other than the exposed portion. Thus, it was found that the airtightness can be sufficiently increased, and the generation of wrinkles and sagging that occur when applied to one surface of the polymer electrolyte membrane can be suppressed. Based on these findings, the inventors of the present invention have arrived at the present invention.

  In order to achieve the above object, the present invention is configured as follows.

  A preparatory step for preparing a polymer electrolyte membrane; and a surface of a first porous substrate that is provided so as to cover the surface of the suction roll having the first air permeability and has a smaller air permeability than the first air permeability. There is provided a method for producing a membrane-catalyst layer assembly comprising a moving step of adsorbing and moving a polymer electrolyte membrane, and a coating step of applying a catalyst ink to the adsorbed polymer electrolyte membrane. At this time, the air permeability of the first porous substrate is desirably 100 seconds / 100 ml or more and 2000 seconds / 100 ml or less.

  According to the first aspect of the present invention, a preparatory step having a configuration in which the first porous substrate is adsorbed to one circumference of the side wall of the suction roll, a preparatory step of supplying a polymer electrolyte membrane, and a polymer electrolyte membrane Supplying a second porous substrate serving as a carrier sheet when moving while adsorbing the powder onto the suction roll, and peeling the first shape holding film holding the shape of the polymer electrolyte membrane from the polymer electrolyte membrane The peeling step, and the polymer film from which the first shape film is peeled is positioned on the upper side of the second porous substrate, and is moved while adsorbed to the suction roll. And a method for producing a membrane-catalyst layer assembly comprising a step of applying a catalyst ink to the surface.

  Examples of the first porous substrate include PET nonwoven fabric, glass fiber nonwoven fabric, (PET / CP) nonwoven fabric, PE microporous, Japanese paper, perforated LLDPE (linear low density polyethylene), clean paper, Any non-woven fabric having heat resistance that does not thermally deform into a suction roll, such as a breathable composite material by combination, can be used without any particular limitation.

  The first porous substrate and the second porous substrate may be made of the same material or different materials. However, the first porous substrate wound around the side peripheral wall of the suction roll is more than the second porous substrate. It is desirable to select a material having a larger thickness or a material having a lower air permeability. By doing so, the second porous substrate and the polymer electrolyte membrane can be firmly adsorbed and fixed by the suction roll, and furthermore, the suction leakage at the exposed portion of the winding can be further reduced.

  According to the second aspect of the present invention, when the polymer electrolyte membrane with a shape-retaining film is supplied to the suction roll, the shape-retaining film is disposed upward, and the second porous substrate of the carrier sheet is the polymer electrolyte membrane. Provided is a method for producing a membrane-catalyst layer assembly comprising peeling a shape-retaining film positioned upward after being supplied.

  At least one membrane surface of the polymer electrolyte membrane to be coated can be prevented from wrinkling due to the coating environment by peeling the shape-retaining film immediately before adsorbing and fixing to the suction roll. In addition, after the second porous substrate is supplied as a carrier sheet and is supplied in contact with the polymer electrolyte membrane, the shape-retaining film of the polymer electrolyte membrane is peeled off, so that the tension of the electrolyte membrane by the roll-to-roll The elongation of the electrolyte membrane can be suppressed.

  According to the 3rd aspect of this invention, the manufacturing method of the membrane-catalyst layer assembly comprised including drying the catalyst ink apply | coated to the polymer electrolyte membrane by heating a suction roll is provided.

  According to the fourth aspect of the present invention, after the suction roll, the laminating step for thermocompression bonding the protective film, and the film on which the second porous substrate and the polymer electrolyte membrane of the carrier sheet are attached to the protective film after the suction roll. -A method for producing a catalyst layer assembly is provided.

  According to the fifth aspect of the present invention, after the protective sheet laminating step, the peeling step of peeling the second porous substrate, and the membrane constituted by winding the polymer electrolyte membrane laminated with the protective sheet -A method for producing a catalyst layer assembly is provided.

  According to the sixth aspect of the present invention, the membrane is configured to include a preparation step in which the planar suction mechanism is positioned after the suction roll, and further drying the polymer electrolyte membrane by heating the planar suction mechanism. -A method for producing a catalyst layer assembly is provided.

  In the method for producing a membrane-catalyst layer assembly according to the present invention, the first porous substrate has a configuration in which the first porous substrate is adsorbed to one circumference of the side wall of the suction roll, and the second porosity of the polymer electrolyte membrane and the carrier sheet Since the first porous substrate covers the exposed portion generated in the suction roll when the porous substrate is simultaneously wound around the suction roll and supplied, suction leakage can be prevented. Thereby, it can fully suppress that a wrinkle and sagging generate | occur | produce in a polymer electrolyte membrane. Therefore, the power generation performance of the fuel cell can be improved.

It is a side view with which the 1st shape maintenance film is attached to the 1st surface of the polymer electrolyte membrane in implementation of this invention. It is a side view in which the 2nd porous substrate is attached to the 2nd surface of the polymer electrolyte membrane in the implementation of the present invention. It is a side view which has peeled the 1st shape maintenance film of the 1st surface of the polymer electrolyte membrane in implementation of this invention. It is a side view by which the catalyst layer is apply | coated to the 1st surface of the polymer electrolyte membrane in implementation of this invention. It is a side view in which the upper and lower sides of the polymer electrolyte membrane (FIG. 4) are located on the opposite side in the practice of the present invention. It is a side view in which the 1st shape maintenance film is attached to the 2nd surface of the polymer electrolyte membrane in the implementation of the present invention. It is a side view by which the catalyst layer is apply | coated to the 1st surface of the polymer electrolyte membrane in implementation of this invention. It is a side view in which the side view of the polymer electrolyte membrane (FIG. 7) in the implementation of the present invention is located in the upside down direction. It is a side view by which the shape retention film in implementation of this invention was peeled, and the protective film has affixed on the 1st catalyst layer. It is a side view by which the catalyst layer is apply | coated to the 2nd surface of the polymer electrolyte membrane in implementation of this invention. It is a side view in which the protective film is attached to the 2nd surface of the polymer electrolyte membrane in implementation of this invention. It is a side view in which the 2nd porous substrate of the 2nd surface of the polymer electrolyte membrane in the implementation of the present invention has peeled off. It is a side view with which the 1st porous substrate is attached to the suction roll side peripheral wall in the implementation of the present invention. FIG. 4 is a side view in which a first porous substrate is attached to the suction roll side peripheral wall in the practice of the present invention, and further a second porous substrate and a polymer electrolyte membrane are attached during transport. It is a side view of the clearance which arises between the suction roll and the cover in the implementation of the conventional invention. It is a schematic explanatory drawing of the membrane-catalyst layer assembly manufacturing apparatus regarding application | coating in Embodiment 1 of this invention. It is a schematic explanatory drawing of the membrane-catalyst layer assembly manufacturing apparatus regarding the lamination in Embodiment 2 of this invention. It is a schematic explanatory drawing of the membrane-catalyst layer assembly manufacturing apparatus regarding peeling in Embodiment 3 of this invention. It is a schematic explanatory drawing of the membrane-catalyst layer assembly manufacturing apparatus regarding the plane suction dryer of Embodiment 4 of this invention. It is a figure showing the suction pressure and the measurement result of the adsorptivity and coating wrinkles in the first porous substrate and the polymer electrolyte membrane when materials having different air permeability are used as the porous substrate. It is a figure showing the relationship between air permeability and attraction | suction pressure at the time of using the material from which air permeability differs as a porous substrate.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 16 is a schematic explanatory diagram of a membrane-catalyst layer assembly manufacturing apparatus relating to coating in Embodiment 1 of the present invention. On the peripheral wall of the suction roll 7, the first porous substrate was pasted for one round without a gap. A polymer film 10 having a shape-retaining film or a second porous substrate on at least one surface is wound around a supply roll 11 on a sheet-like polymer electrolyte membrane as shown in FIG. 1 or FIG. Yes. One end portion of the polymer film 10 drawn out from the supply roll 11 is suspended on a suction roll 7 having a diameter of 300 mm, and is then wound around a take-up roll 15. At that time, when the sheet-like polymer electrolyte membrane shown in FIG. 1 or FIG. 6 is supplied, the sheet serving as the second porous substrate is transferred from the second porous substrate supply roll 12 to the polymer electrolyte membrane. Supplied as a carrier sheet. The film or porous substrate is continuously peeled off by the peeling device 13 from the polymer film 10 with the shape-retaining film or the porous substrate sheet, and the sheet-like polymer electrolyte membrane shown in FIGS. Thus, it is supplied after the application section.

  As the polymer electrolyte membrane 1, various polymer electrolyte membranes conventionally used such as fluorine-based and hydrocarbon-based can be used. For example, as the polymer electrolyte membrane 1, a polymer electrolyte membrane made of perfluorocarbon sulfonic acid (for example, Nafion (registered trademark) manufactured by DuPont, USA, Flemion (registered trademark) manufactured by Asahi Glass Co., Ltd., manufactured by Asahi Kasei Co., Ltd. Aciplex®, etc.) can be used. The polymer electrolyte membrane 1 is usually a member that is very thin and easily deforms even with a little moisture.

  The catalyst ink is an ink obtained by mixing carbon fine particles supporting a platinum-based metal catalyst with a solvent. As the metal catalyst, for example, platinum, ruthenium, rhodium and iridium can be used. Carbon black, ketjen black, and acetylene black can be used as the carbon powder. As the solvent, water, ethanol, alcohol solvents such as n-propanol and n-butanol, and organic solvents such as ether solvents, ester solvents and fluorine solvents can be used. By drying the solvent of the platinum-based metal catalyst ink, it is possible to form the first and second catalyst layers 4 mainly composed of carbon powder carrying a metal catalyst.

(Embodiment 1)
As the first porous substrate, 100 g / m ^{2 of} clean paper was pasted without gaps for one round. The catalyst ink for the cathode uses 5 g of carbon black having an average particle diameter of 50 to 60 nm supporting 50% by weight of Pt having an average particle diameter of 3 nm as a catalyst, and after adding 10 g of ion-exchanged water to this, 91 perfluorocarbon sulfonic acid is added. The mixture was prepared by adding 10 g of ethanol solution containing 5% by weight and 5 g of ethanol solution as a solvent and mixing them while applying ultrasonic vibration. The catalyst ink was supplied from the supply pump P of the apparatus shown in FIG. As the second porous substrate, 50 g / m ² was used as a carrier sheet, and continuously applied in one direction of travel to the one surface of the polymer electrolyte membrane with the porous substrate shown in FIG. The vacuum pressure in the suction roll at that time was displayed as 80 kPa. The coating speed was 0.5 m / min, the suction roll was heat-treated, dried at a temperature of 55 ° C. for 5 minutes, and wound around the take-up roll 15.

  The catalyst ink for the anode used 5 g of carbon black having an average particle diameter of 50 to 60 nm carrying 50% by weight of a Pt—Ru alloy having an average particle diameter of 2 to 3 nm as a catalyst, and after adding 15 g of ion exchange water thereto. Then, 10 g of an ethanol solution containing 91% by weight of perfluorocarbon sulfonic acid and 9 g of an ethanol solution as a solvent were added and mixed while applying ultrasonic vibration to prepare.

  The intermediate body of FIG. 5 was set on the supply roll 11 of FIG. 16, and the anode catalyst ink was applied to the other surface of the intermediate body of FIG. The coating speed was 0.5 m / min, followed by hot air drying at 55 ° C. for 5 minutes.

In this way, by using 100 g / m ^{2 of} clean paper having a high basis weight as the first porous substrate, it is possible to prevent suction leakage of the exposed portion 8 and increase the pressure in the suction roll to 80 kPa. did it. The second porous substrate prevents the cathode catalyst layer from being adsorbed and removed by the suction roll particularly when the anode side is applied. In order to further increase the adsorption of the polymer electrolyte membrane, the first porous substrate is used. Wrinkles and tears that occur during application do not occur by setting the polymer substrate lightly than the basis weight of the porous substrate and firmly adsorbing and fixing the polymer electrolyte membrane to the suction roll using a porous substrate of 50 g / m ² .

  In addition, other suitable materials for the first and second porous substrates have been clarified by experiment. The results are shown in FIG. 20 and FIG.

  FIG. 20 shows the results of measurement of the suction pressure and the adsorptivity and coating wrinkles in the first porous substrate and the polymer electrolyte membrane when materials having different air permeability are used as the porous substrate. FIG. 21 is a graph showing the relationship between the air permeability and the suction pressure.

  Here, the air permeability (air permeability), also referred to as the measurement of the air resistance of paper, was measured with an apparatus (Oken type tester) manufactured by Asahi Seiko Co., Ltd. and registered with JIS standards.

  Based on the above results, the first porous substrate having an air permeability of 100 seconds / 100 ml or more and 2000 seconds / 100 ml or less more preferably adsorbs and fixes the polymer electrolyte membrane, and at the time of application of the catalyst ink. It was found that wrinkles and tears can be prevented.

  In addition, when the air permeability exceeds 2000 seconds / 100 ml, the suction pressure reaches near the hermetic state only with the first porous substrate, so that it is positioned further on the first and second porous substrates. The adsorptive power of the electrolyte membrane is reduced.

  As the second porous substrate, one having an air permeability of 0 second / 100 ml or more and 100 seconds / 100 ml or less was suitable.

(Embodiment 2)
As shown in FIG. 17, the shape-retaining film is supplied from the shape-retaining film supply device 16 after applying the suction roll, and the laminate-retaining devices 17a and 17b are pressurized at a temperature of 80 ° C. The polymer electrolyte membrane was bonded by thermocompression bonding and wound around a take-up roll 15. By doing so, the generation of wrinkles during winding with the winding roll 15 could be suppressed.

(Embodiment 3)
As shown in FIG. 18, the second porous substrate was wound up and wound around the winding roll 15 after the thermocompression bonding of the shape retention film in the laminate roll apparatus. By doing so, it was possible to further suppress the generation of wrinkles during winding with the winding roll 15.

(Embodiment 4)
As shown in FIG. 19, the anode is applied at a speed of 1.0 m / min, and after the suction roll, it is dried by a flat-type adsorption dryer 19 to suppress the generation of wrinkles during application. We were able to.

(Conventional form)
As shown in FIG. 15, the joint rolls 20a and 20b are attached to the exposed portion 8 and the cover 21 is installed. However, gaps due to the clearances 9a and 9b are generated, and the vacuum pressure of the suction roll is only 70 kPa. During the coating, wrinkles and tears were caused by the swelling that occurred during the application to the film due to insufficient suction of the polymer film by the suction roll. If the wrinkles remain as they are, the battery performance is degraded.

  The method and apparatus for producing a membrane-catalyst layer assembly according to the present invention can sufficiently suppress the occurrence of wrinkles and sagging in a polymer electrolyte membrane, and thus, for example, movement of portable electronic devices, automobiles, etc. The power generation performance of a fuel cell used as a drive power source for a body, a distributed power generation system, and a home cogeneration system can be improved.

DESCRIPTION OF SYMBOLS 1 Polymer electrolyte membrane 2 1st shape maintenance film 3a, 3b 2nd porous substrate 4 1st catalyst layer 5 Protective film 6 1st porous substrate 7 Suction roll 8 Exposed part 9a, 9b Clearance 10 Polymer Film 11 Supply roll 12 Second porous substrate supply roll 13 Peeling device 14 Die 15 Winding roll 16 Shape holding film supply device 17a, 17b Laminating roll device
18 Second porous substrate peeling device 19 Planar adsorption dryer 20a, 20b Joint roll 21 Cover

Claims (14)

A preparation step of preparing a polymer electrolyte membrane;
The polymer electrolyte membrane is adsorbed on the surface of a first porous substrate that is provided so as to cover the surface of the suction roll having the first air permeability and has a smaller air permeability than the first air permeability. A moving process to move;
An application step of applying a catalyst ink to the adsorbed polymer electrolyte membrane;
A method for producing a membrane-catalyst layer assembly comprising: The air permeability of the first porous substrate is 100 seconds / 100 ml or more and 2000 seconds / 100 ml or less,
The manufacturing method of the membrane-catalyst layer assembly according to claim 1. A supplying step of supplying a second porous substrate serving as a carrier sheet when moving the polymer electrolyte membrane while adsorbing the polymer electrolyte membrane to the suction roll;
The method for producing a membrane-catalyst layer assembly according to claim 1, further comprising: The air permeability of the second porous substrate is 0 second / 100 ml or more and 100 seconds / 100 ml or less.
The manufacturing method of the membrane-catalyst layer assembly of Claim 3. Further comprising a peeling step of peeling the shape-retaining film that holds the shape of the polymer electrolyte membrane that has been attached in advance from the polymer electrolyte membrane,
The coating step moves while adsorbed to a suction roll while the polymer electrolyte membrane from which the shape-retaining film is peeled is positioned on the second porous substrate, and the polymer electrolyte membrane is moved on the suction roll. A step of applying a catalyst ink to
The manufacturing method of the membrane-catalyst layer assembly according to claim 1 or 3. In the peeling step, when the polymer electrolyte membrane before the shape holding film is peeled is supplied to the suction roll, the shape holding film is disposed upward, and the second porous substrate is the polymer electrolyte membrane. Is a step of peeling the shape retaining film after being supplied to
A method for producing a membrane-catalyst layer assembly according to claim 5. A drying step of drying the catalyst ink applied to the polymer electrolyte membrane by heating the suction roll;
The method for producing a membrane-catalyst layer assembly according to claim 1 or 3, further comprising: A laminating step in which a protective film is thermocompression bonded to the polymer electrolyte membrane on the second porous substrate coated with the catalyst ink;
The method for producing a membrane-catalyst layer assembly according to claim 1 or 3, further comprising: A peeling step of peeling the second porous substrate after the laminating step;
The method for producing a membrane-catalyst layer assembly according to claim 8, further comprising: After the coating step, a drying step of drying the polymer electrolyte membrane by a planar adsorption dryer,
The method for producing a membrane-catalyst layer assembly according to claim 1 or 3, further comprising: A suction roll having a first air permeability;
A first porous substrate provided so as to cover the surface of the suction roll and having a smaller air permeability than the first air permeability;
An apparatus for producing a membrane-catalyst layer assembly comprising: The air permeability of the first porous substrate is 100 seconds / 100 ml or more and 2000 seconds / 100 ml or less,
The apparatus for producing a membrane-catalyst layer assembly according to claim 1. A supply device for supplying a polymer electrolyte membrane;
A supply device for supplying a second porous substrate serving as a carrier sheet for conveying the polymer electrolyte membrane while adsorbing the polymer electrolyte membrane to the suction roll;
A coating apparatus for applying a catalyst ink to the polymer electrolyte membrane adsorbed on the suction roll;
The apparatus for producing a membrane-catalyst layer assembly according to claim 11, further comprising: The air permeability of the second porous substrate is 0 second / 100 ml or more and 100 seconds / 100 ml or less.
The apparatus for producing a membrane-catalyst layer assembly according to claim 13.

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