JP2009129614A - Manufacturing method and manufacturing device of catalyst layer-polymer electrolyte membrane assembly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the manufacturing method and manufacturing device of a catalyst layer-polymer electrolyte membrane assembly reducing the possibility of mixing of impurities to a catalyst layer and generation of defects of the catalyst layer, by using an inexpensive coating substrate. <P>SOLUTION: A guide roller 11 for controlling the delivery is installed in a winding roller 10 of the catalyst layer-polymer electrolyte membrane assembly. Guide rollers 12, 13, 17 and a pressure applying roller 6 are installed in a delivery passage of the assembly. The pressure applying roller 6 is supported in a pressure applying mechanism 14. An assembly supporting roller 15 is installed in the position facing the pressure applying roller 6 through the catalyst layer-polymer electrolyte membrane assembly. The coating substrate and the catalyst layer are separated while applying pressure with the pressure applying roller 6, and the coating substrate is wound around the pressure applying roller 6. A gap adjusting mechanism 16 for adjusting the gap between the pressure apply roller 6 and the assembly supporting roller 15 is installed. A winding roller 18 winding the catalyst layer-polymer electrolyte membrane from which the coating substrate 3 is separated is installed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a solid polymer fuel cell used for, for example, a stationary power source, an in-vehicle power source, and a portable power source, and more particularly, a catalyst layer-polymer electrolyte constituting the solid polymer fuel cell The present invention relates to a method and apparatus for manufacturing a membrane assembly.

  A fuel cell is a device that converts the chemical energy of a fuel gas or liquid fuel into electrical energy by electrochemically reacting a fuel gas such as hydrogen or a liquid fuel with an oxidant gas such as air.

  A fuel cell using such pollution-free energy is composed of a unit cell composed of a fuel electrode and an oxidant electrode arranged with an electrolyte layer having ionic conductivity, and a reactant (fuel gas or liquid fuel, A fuel supply groove for supplying an oxidant gas), a conductive gas-impermeable fuel supply separator provided with an oxidant gas supply groove, an oxidant gas supply separator, and a cooling provided with a cooling water supply groove A plurality of basic components including a water supply separator are stacked to form a fuel cell stack.

  In such a fuel cell stack, when each reaction gas (fuel gas, oxidant gas) is supplied to the fuel supply groove and the oxidant gas groove via the reaction gas supply manifold provided in the fuel cell stack, the unit The electrochemical reaction shown below proceeds at a pair of electrodes of the battery, and an electromotive force is generated between the electrodes.

[Fuel electrode]
2H ₂ → 4H ⁺ 4e ⁻ (1)
[Oxidant electrode]
O ₂ + 4H ⁺ + 4e ⁻ → 2H ₂ O (2)

  In the above equation, the fuel electrode dissociates the supplied hydrogen into hydrogen ions and electrons as shown in equation (1). At that time, hydrogen ions pass through the electrolyte layer, and electrons move through the external circuit to the oxidant electrode. On the other hand, at the oxidant electrode, as shown in Formula (2), oxygen in the supplied oxidant gas reacts with the hydrogen ions and electrons to generate water. At this time, electrons that have passed through the external circuit become current and can be supplied with electric power.

  In addition, the water produced | generated by reaction of Formula (1) (2) is a fuel cell via the reaction gas discharge manifold provided in the said fuel cell laminated body with the reaction gas (already-reacted gas) which was not consumed with the fuel cell main body. It is discharged outside the main body.

  By the way, fuel cells are classified into alkaline fuel cells, phosphoric acid fuel cells, polymer electrolyte fuel cells, molten carbonate fuel cells, and solid oxide fuel cells, depending on the electrolyte layer used. . Among these fuel cells, polymer electrolyte fuel cells using a solid polymer electrolyte membrane as an electrolyte layer can be operated at a relatively low temperature, have a short start-up time, and provide a large output density. It has attracted a great deal of attention as an in-vehicle power source and a portable power source.

  A unit cell of a polymer electrolyte fuel cell is generally manufactured by thermocompression bonding a fuel electrode and an oxidant electrode to a polymer electrolyte membrane having ionic conductivity. The fuel electrode and the oxidant electrode are composed of a gas diffusion layer using a carbon material such as carbon paper and a catalyst layer in which chemical reactions (1) and (2) occur on the fuel electrode and the oxidant electrode.

  As a method for forming the fuel electrode and the catalyst layer, there are a method for directly forming the catalyst layer on the gas diffusion layer and a method for forming the catalyst layer on the coated substrate. The method of forming the catalyst layer on the coated substrate is easy to roll, and when the polymer electrolyte membrane is roll-formed, it can be continuously thermocompression-bonded, making it effective from the viewpoint of mass production technology and cost reduction. It can be said that it is a method.

  As a method for forming a catalyst layer on a coated substrate, a method of applying a catalyst solution to a heat-resistant fluororesin substrate such as PTFE (polytetrafluoroethylene) having excellent releasability and drying is proposed. Such a heat-resistant fluororesin substrate is expensive, and the cost for mass production increases.

In contrast, polymer films such as polyimide, polyamide polyethylene terephthalate, polyethylene naphthalate, polyphenylene sulfide, and polysulfone are less expensive than PTFE substrates, but have poor peelability, so a catalyst layer formed on the substrate. When peeling off the catalyst layer, the catalyst layer remains on the substrate, and there is a problem that a defect portion exists in the completed catalyst layer. For this reason, Patent Document 1 proposes a method of facilitating the peeling of the catalyst layer by providing a peeling layer on the surface of an inexpensive substrate that replaces the PTFE substrate.
JP 2004-95553 A

  According to the invention of Patent Document 1, by providing a release layer on the surface of the coated substrate, even when an inexpensive polymer film is used as the substrate, the catalyst layer can be smoothly peeled off. Thermocompression bonding to the polymer electrolyte membrane is facilitated. On the other hand, if a release layer is provided on the coated substrate, the entry of impurities into the catalyst layer becomes a problem, which cannot be said to be suitable for practical use.

  The present invention has been proposed in order to solve the problems of the prior art as described above, and its purpose is to thermally bond a catalyst layer formed on a coated substrate to a polymer electrolyte membrane, and then In the production of the catalyst layer-polymer electrolyte membrane assembly by peeling the coated substrate from the substrate, an inexpensive coated substrate such as inexpensive polyethylene terephthalate is used, and impurities are mixed into the catalyst layer or the catalyst layer is lost. It is an object of the present invention to provide a production method and production apparatus for a catalyst layer-polymer electrolyte membrane assembly with little possibility.

  In order to achieve the above object, the method for producing a catalyst layer-polymer electrolyte membrane assembly of the present invention comprises a step of forming at least one of a fuel electrode catalyst layer or an oxidant electrode catalyst layer on a coating substrate, The fuel electrode catalyst layer or the oxidant electrode catalyst layer formed on the substrate is thermocompression bonded to the polymer electrolyte membrane together with the coated substrate, and the coated substrate and the catalyst layer thermally bonded to the polymer electrolyte membrane are peeled off. And a step of peeling the coated substrate from the catalyst layer portion while applying pressure from the surface of the coated substrate opposite to the catalyst layer.

  The apparatus for producing a catalyst layer-polymer electrolyte membrane assembly of the present invention further comprises a coated substrate peeling means for peeling off the coated substrate thermocompression bonded to the polymer electrolyte membrane from the interface with the catalyst layer. The coated substrate peeling means includes a coated substrate and a catalyst layer that are thermocompression bonded to the polymer electrolyte membrane, while applying pressure from the surface opposite to the catalyst layer of the coated substrate at the peeled portion. It is characterized in that a pressure applying member is provided for peeling off the catalyst from the catalyst layer portion.

  In the present invention having the above-described configuration, since the peeling operation is performed while applying a certain pressure to the coated substrate by the pressure applying member, the surface pressure at the peeling position between the coated substrate, the catalyst layer, and the polymer electrolyte membrane, The peeling position and the peeling angle are always kept constant. As a result, the magnitude and direction of the force applied to the boundary surface between the coated substrate and the catalyst layer can be made constant, and it is possible to prevent peeling unevenness from occurring.

  According to the present invention, since the coated substrate is peeled off from the catalyst layer while applying pressure, even when a polymer film such as polyethylene terephthalate is used for the coated substrate, the catalyst layer is pulled while being adhered to the coated substrate side. The phenomenon of peeling off can be reduced, and defects in the catalyst layer are eliminated while using an inexpensive coated substrate. Further, it is possible to prevent impurities from being mixed into the catalyst layer as in the case where a release layer is separately formed.

(1) 1st Embodiment The manufacturing method of the catalyst layer-polymer electrolyte membrane assembly in 1st Embodiment of this invention is the catalyst layer 2a of the fuel electrode formed in the application | coating board | substrate 3, as shown in FIG. After the oxidant electrode catalyst layer 2b) is thermally transferred to the polymer electrolyte membrane 1, it is peeled off from the fuel electrode catalyst layer 2a (or the oxidant electrode catalyst layer 2b) while holding the coated substrate 3 against the application plate 4. It is characterized by going.

  In this case, the contact plate 4 corresponds to the pressure applying member described in the claims of the present invention. Although not shown in the drawing, the coating plate 4 is provided with a driving device for moving the coating plate 4 along the surface of the coating substrate 3. The contact plate 4 is configured to move along the surface of the coated substrate 3 as the position of separation from the layer 2a (or the catalyst layer 2b of the oxidant electrode) moves.

  In the present embodiment, a polyethylene terephthalate sheet having a thickness of 50 μm is used as the coating substrate 3 on which the fuel electrode catalyst layer 2a (or the oxidant electrode catalyst layer 2b) is formed.

  The catalyst layer 2a of the fuel electrode has an electrolyte dispersion solution (5 wt% solution of DuPont's trade name “Nafion”) on a catalyst in which a Pt—Ru alloy is supported on carbon black so that the dry weight ratio is 3: 1. 2 is applied to a 10 cm square polyethylene terephthalate substrate 3 provided with a peeling margin 5 as shown in FIG. 2 so that the amount of platinum is 0.4 mg per unit area and dried at 90 ° C. for 10 minutes. Formed.

  The catalyst layer 2b of the oxidant electrode is a paste obtained by mixing a catalyst in which Pt is supported on carbon black with an electrolyte dispersion solution (a 5 wt% solution of DuPont's trade name “Nafion”) at a dry weight ratio of 3: 1. Was applied to a 10 cm square polyethylene terephthalate substrate 3 provided with a peeling margin 5 as shown in FIG. 2 so that the amount of platinum was 0.4 mg per unit area and dried at 90 ° C. for 10 minutes. .

The formed fuel electrode catalyst layer 2a and the oxidant electrode catalyst layer 2b sandwich an 11 cm square solid polymer electrolyte membrane (manufactured by DuPont, thickness 50 μm), and the temperature is 130 ° C. and the surface pressure is 50 kgf / cm ² . Thermocompression bonding was performed for a minute. After the fuel electrode catalyst layer 2a and the oxidant electrode catalyst layer 2b are thermocompression bonded to the polymer electrolyte membrane, a coating plate 4 having a length of 12 cm, a thickness of 1 mm, and a width of 3 cm as shown in FIGS. 1 and 2 is used. While holding the coated substrate 3 with the cover plate 4, the peeling margin 4 was picked and the coated substrate 4 was peeled off from the catalyst layer 2 a (or 2 b) to obtain a catalyst layer-polymer electrolyte membrane assembly.

  At this time, when the coating weight before and after thermal transfer of the coated substrate 3 on which the catalyst layer 2a (or 2b) is formed is measured, the weight of the coated substrate 3 after thermal transfer is the same as the weight before the catalyst layer 2a (or 2b) is formed. It can be seen that all the catalyst layers 2a (or 2b) formed on the coated substrate 3 were thermally transferred to the polymer electrolyte membrane 1 without change.

As a comparative example, a fuel electrode catalyst layer and an oxidant electrode catalyst layer were formed in the same procedure as in the above embodiment using a 10 cm square polyethylene terephthalate coated substrate having a thickness of 100 μm. An 11 cm square solid polymer electrolyte membrane (manufactured by DuPont, thickness 50 μm) is sandwiched between the fuel electrode catalyst layer and the oxidant electrode catalyst layer and thermocompression bonded at a temperature of 130 ° C. and a surface pressure of 50 kgf / cm ² for 2 minutes. A catalyst layer-polymer electrolyte membrane assembly was obtained.

  After thermocompression bonding, the coated substrate was peeled from the catalyst layer-polymer electrolyte membrane assembly from the end. When the weight is measured after the coated substrate is peeled off, only 80% of the catalyst layer is thermally transferred, 20% of the catalyst layer remains on the coated substrate, and the catalyst layer-polymer electrolyte membrane assembly The catalyst layer had peeling unevenness.

  As described above, in the first embodiment, when the coated substrate 3 is peeled off, the coating plate 4 is used, and the coated substrate 3 is peeled off while applying pressure, so that the coated substrate 3 is compared with a conventional heat resistant fluororesin. The thermal transfer of the catalyst layer 2a (or 2b) was successfully performed while using inexpensive and inexpensive polyethylene terephthalate. Further, by using the coated substrate 3 having a thickness of 50 μm or less, the coated substrate 3 can be easily bent, and the coated substrate 3 can be easily peeled off from the catalyst layer 2a (or 2b), and the catalyst layer 2a. There is also an effect that the thermal transfer of (or 2b) to the polymer electrolyte membrane 1 can be performed satisfactorily. Further, the provision of the separation margin 5 on the coated substrate 3 makes it easy to peel off the coated substrate 3.

(2) 2nd Embodiment The manufacturing method of the catalyst layer-polymer electrolyte membrane assembly in 2nd Embodiment of this invention is demonstrated using FIG.3 and FIG.4.
As shown in FIG. 3, the basic configuration of the manufacturing method of the second embodiment is that after the catalyst layer 2a (or 2b) formed on the coating substrate 3 is thermally transferred to the polymer electrolyte membrane 1, the coating substrate The coated substrate 3 is peeled off from the catalyst layer 2a (or 2b) while pressing 3 with the pressure applying roller 6.

  In the second embodiment, the pressure applying roller 6 corresponds to the pressure applying member described in the claims of the present invention. In the first embodiment, the peeling operation is performed while moving the pressure applying member with respect to the coating substrate 3. However, in the second embodiment, the position of the roller 6 that is the pressure applying member is not changed. The coated substrate 3 is peeled off while moving the catalyst layer-polymer electrolyte membrane assembly.

  In realizing this manufacturing method, the manufacturing apparatus shown in FIG. 4 was used. In this manufacturing apparatus, a catalyst layer-polymer electrolyte membrane assembly formed by joining a polymer electrolyte membrane 1 and a catalyst layer 2a (or 2b) coated on a coating substrate 3 is wound around a winding roller 10 in advance. The coated substrate 3 is peeled off from the polymer electrolyte membrane 1 and the catalyst layer 2a (or 2b) while being fed out from the winding roller 10.

  That is, the winding roller 10 is arranged so that the guide roller 11 for controlling the feeding amount of the catalyst layer-polymer electrolyte membrane assembly wound around the winding roller 10 is in contact with a constant pressure. Guide rollers 12 and 13 for guidance are provided in the feeding path of the catalyst layer-polymer electrolyte membrane assembly. The pressure applying roller 6 of this embodiment is provided at the tip of the guide guide rollers 12 and 13.

  In this embodiment, the pressure applying roller 6 serves as both a peeling roller for peeling off the coated substrate 3 from the catalyst layer and a winding roller for collecting the peeled coated substrate 3. .

  The pressure applying roller 6 is rotatably supported by a pressure applying mechanism 14 having pressure applying means such as a cylinder driven by hydraulic pressure or air pressure, and a spring, and is applied on the surface of the catalyst layer-polymer electrolyte membrane assembly. 3 while rotating at a constant pressure.

  A joint support roller 15 serving as a peeling guide is provided at a position opposite to the pressure applying roller 6 across the catalyst layer-polymer electrolyte membrane assembly, and is configured to receive the pressure of the pressure applying roller 6. Has been. Further, in order to adjust the gap between the pressure applying roller 6 and the joined body supporting roller 15, the pressure applying mechanism 14 is provided with a roller gap adjusting mechanism 16 such as a long hole bearing.

  A take-up roller 18 for winding up the catalyst layer-polymer electrolyte membrane from which the coated substrate 3 has been peeled off is provided via a guide roller 17 at the subsequent stage of the peeling mechanism by the pressure applying roller 6.

  The take-up roller 10 that winds up the joined body of the coated substrate, the catalyst layer, and the polymer electrolyte membrane, and the coated substrate that peels off the coated substrate of the joined body fed out from the take-up roller from the interface with the catalyst layer. The α-value force imparting roller 6 that is the take-up roller of the present invention and the take-up roller 18 that takes up the electrode-polymer electrolyte membrane assembly from which the coated substrate has been peeled off are the coated substrate peeling device described in the claims of the present invention. Means.

  Although the manufacturing apparatus of 2nd Embodiment has the above structures, the effect | action is demonstrated next. In the second embodiment, a polyethylene terephthalate sheet having a thickness of 30 μm is used as the coating substrate 3 on which the fuel electrode catalyst layer 2a and the oxidant electrode catalyst layer 2b are formed. The catalyst layer 2a of the fuel electrode is a paste in which an electrolyte dispersion solution (DuPont, Nafion, 5 wt% solution) is mixed with a catalyst in which a Pt—Ru alloy is supported on carbon black to a dry weight ratio of 3: 1. A 20 cm wide polyethylene terephthalate substrate provided with a peeling margin was continuously applied so that the amount of platinum was 0.4 mg per unit area and dried at 90 ° C. for 10 minutes.

  The catalyst layer 2b of the oxidant electrode is made by removing a paste obtained by mixing an electrolyte dispersion solution (DuPont, Nafion, 5 wt% solution) at a dry weight ratio of 3: 1 with a catalyst in which Pt is supported on carbon black. It was applied to a 20 cm wide polyethylene terephthalate substrate so that the amount of platinum was 0.4 mg per unit area and dried at 90 ° C. for 10 minutes.

The above-formed fuel electrode catalyst layer 2a and oxidant electrode catalyst layer 2b sandwich a solid polymer electrolyte membrane (DuPont, 50 μm thick) having a width of 22 cm, temperature 130 ° C., surface pressure 50 kgf with a hot roller. The linear pressure was adjusted so as to be / cm ² , and crimped.

  A catalyst layer-polymer electrolyte membrane assembly in which the fuel electrode catalyst layer 2a or the oxidizer electrode catalyst layer 2b is thermocompression bonded to the polymer electrolyte membrane 1 together with the coating substrate 3 is set on the winding roller 10 and the guide roller 11, and guided. The pressure applying roller 6 and the joined body supporting roller 15 were set via the guide rollers 12 and 13. An adhesive tape was used at the winding start portion of the pressure applying roller 6 to fix the separation margin of the coated substrate 3.

For the pressure applying roller 6, the surface pressure of the pressure applying roller 6 against the coating substrate 3 was set to 15 kgf / cm ² by the pressure applying mechanism 14, and the linear pressure of the pressure applying roller 6 was adjusted. The electrode-polymer electrolyte membrane assembly in which the pressure applying roller 6 is rotated and wound around the outer periphery of the coated substrate 3 while peeling the coated substrate 3 from the catalyst layer 2a (or 2b) It was wound on a winding roller 18.

  In this case, since the gap between the pressure applying roller 6 and the joined body supporting roller 15 changes by peeling off the coating substrate 3 and winding it around the pressure applying roller 6, the roller gap adjusting mechanism 16 is always used. The gap between the rollers 6 and 15 can be kept constant. In this way, when the weight of the coated substrate 3 peeled off was measured, it was the same as the weight before coating of the catalyst layer, and an electrode-polymer electrolyte membrane assembly without catalyst loss could be obtained.

  As described above, by using the manufacturing apparatus of the second embodiment, the coated substrate 3 can be continuously peeled from the catalyst layer-polymer electrolyte membrane, and when the coated substrate 3 is peeled off, the pressure roller Since the pressure application to the coated substrate by 6 and the winding of the coated substrate 3 can be performed, the catalyst layer-polymer electrolyte membrane assembly can be continuously formed.

(3) Other Embodiments The present invention is not limited to the above-described embodiments, and includes the following embodiments.

(1) The pressure for pressing the coated substrate 3 with a contact plate or a pressure applying roller can be appropriately changed depending on the material of the coated substrate, the thickness, the degree of adhesion of the catalyst layer, etc. .1~30kgf / cm ^2, preferably about, 15 kgf / cm ² about desirable.

(2) When the peeling operation is performed while pressing the coated substrate against the catalyst layer with a contact plate or a pressure applying roller, the separation angle of the coated substrate with respect to the catalyst layer (the angle formed between the catalyst layer and the coated substrate) It is about 45 to 120 degrees, preferably about 90 degrees.

(3) When a 10 to 11 cm square coated substrate as in the first embodiment is used, a coating plate having an arcuate corner having a radius of about 1 cm or a pressure applying roller having a radius of about 1 cm is used. Is preferred. In addition, a bar-shaped member having a semicircular cross section or a member having a rectangular cross section can be used as the contact plate.

(4) The peeling speed depends on the material of the coated substrate and the type of the catalyst layer, but is preferably about 1 to 10 cm / sec as an example.

(5) In addition to the polyethylene terephthalate shown in the above embodiment, a polymer film such as polyimide, polyamide polyethylene terephthalate, polyphenylene sulfide, and polysulfone can be used as the coated substrate. Moreover, when the price does not become a problem as an application | coating board | substrate, it is also possible to use heat resistant fluororesins, such as PTFE conventionally used.

(6) The coated substrate 3 is not limited to the 50 μm-thick polyethylene terephthalate of the above embodiment, and a polymer material having a thickness of 5 to 200 μm (preferably 10 to 50 μm) and a heat distortion temperature of 130 ° C. or more can be used as appropriate. . That is, the polymer material having a thickness of 10 to 50 μm bends flexibly because of its thin wall thickness, so that the isolated portion bends along the surface of the pressure applying member even if the peeling operation is performed while being pressed by the pressure applying member. In addition, the peeling operation can always be performed at the same angle. Further, when the thermal deformation temperature is 130 ° C. or higher, when the catalyst layer is thermocompression bonded to the polymer electrolyte membrane, the coated substrate is not deformed or melted, and the catalyst layer can be formed uniformly.

(7) In the second embodiment, the pressure application roller 6 is also used as the take-up roller of the coated substrate 3 from which the pressure applying roller 6 has been peeled off. In order to wind up the coated substrate 3 that has been peeled off from the catalyst layer by the pressure applying roller 6 portion. In addition, a winding roller for the coating substrate 3 can be provided separately after the pressure applying roller 6.

(8) In the second embodiment, the coated substrate peeling means is constituted by a winding roller. However, as a peeling means for the flat coated substrate-catalyst layer / polymer electrolyte membrane assembly that is not in a wound state, It is also possible to adopt a configuration in which the end portion of the coating substrate and the end portion of the polymer electrolyte membrane are gripped by a clip-shaped gripping portion and both are peeled off.

Sectional drawing which shows the peeling state of the coating substrate in 1st Embodiment of this invention. The top view which shows the coating substrate in the 1st Embodiment of this invention, and its peeling margin. Sectional drawing which shows the peeling state of the coating substrate in 2nd Embodiment of this invention. The side view which shows the manufacturing apparatus of the catalyst layer-polymer electrolyte membrane assembly in 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Polymer electrolyte membrane 2a, 2b ... Catalyst layer 3 ... Application | coating board | substrate 4 ... Addressing plate 5 ... Separation 6 ... Pressure-applying roller 10 ... Winding roller 11, 12, 13, of catalyst layer-polymer electrolyte membrane assembly 17 ... Guide roller 14 ... Pressure applying mechanism 15 ... Joint body support roller 16 ... Roller gap adjusting mechanism 18 ... Catalyst layer-polymer electrolyte membrane winding roller

Claims (11)

Forming at least one of a fuel electrode catalyst layer or an oxidant electrode catalyst layer on a coated substrate;
A step of thermocompression bonding the fuel electrode catalyst layer or the oxidant electrode catalyst layer formed on the coated substrate to the polymer electrolyte membrane together with the coated substrate;
A step of peeling the coated substrate from the catalyst layer portion while applying pressure from the surface opposite to the catalyst layer of the coated substrate in the peeled portion of the coated substrate and the catalyst layer thermocompression bonded to the polymer electrolyte membrane. A method for producing a catalyst layer-polymer electrolyte membrane assembly, comprising:   2. The method for producing a catalyst layer-polymer electrolyte membrane assembly according to claim 1, wherein a polymer material having a thickness of 10 to 50 μm and a thermal deformation temperature of 130 ° C. or higher is used as the coating substrate.   The method for producing a catalyst layer-polymer electrolyte membrane assembly according to claim 1 or 2, wherein a separation margin is provided on the coated substrate. The step of peeling the coated substrate from the catalyst layer portion uses a pressure applying member that contacts the surface of the coated substrate at a predetermined pressure, while applying pressure from the surface opposite to the catalyst layer of the coated substrate, It is to peel off the coated substrate from the catalyst layer part,
The pressure applying member is configured to move along the surface of the coating substrate as the peeling position between the coating substrate and the catalyst layer moves in accordance with the peeling operation. Item 4. The method for producing a catalyst layer-polymer electrolyte membrane assembly according to any one of Item 3. The process of peeling the coated substrate from the catalyst layer portion uses a pressure applying member that contacts the surface of the coated substrate at a predetermined pressure, while applying pressure from the surface opposite to the catalyst layer of the coated substrate, It is to peel off the coated substrate from the catalyst layer part,
The production of the catalyst layer-polymer electrolyte membrane assembly according to any one of claims 1 to 3, wherein the pressure applying member applies a linear pressure to the surface of the coated substrate. Method. A coating substrate peeling means for peeling the coating substrate thermocompression bonded to the polymer electrolyte membrane from the interface with the catalyst layer,
For the coated substrate peeling means, the coated substrate and the catalyst layer that are thermocompression bonded to the polymer electrolyte membrane are applied to the coated substrate while applying pressure from the surface opposite to the catalyst layer of the coated substrate in the peeled portion. An apparatus for producing a catalyst layer-polymer electrolyte membrane assembly, wherein a pressure applying member for peeling from the catalyst layer portion is provided.   7. The catalyst layer-polymer electrolyte membrane according to claim 6, wherein the pressure applying member is a pressure applying roller that contacts the surface of the coated substrate at a constant pressure and rotates in accordance with a peeling operation of the coated substrate. Bonded body manufacturing equipment.   The coated substrate peeling means includes a winding roller that winds up the bonded body of the coated substrate, the catalyst layer, and the polymer electrolyte membrane, and a boundary between the coated substrate of the bonded body fed out from the winding roller and the catalyst layer. The catalyst according to claim 7, comprising a winding roller for the coated substrate peeled off from the surface, and a winding roller for winding the electrode-polymer electrolyte membrane assembly from which the coated substrate has been peeled off. An apparatus for producing a layer-polymer electrolyte membrane assembly.   9. The apparatus for producing a catalyst layer-polymer electrolyte membrane assembly according to claim 8, wherein the pressure applying roller also serves as a winding roller for a coated substrate.   9. The apparatus for producing a catalyst layer-polymer electrolyte membrane assembly according to claim 8, wherein the pressure applying roller has a mechanism for adjusting a pressure applied to a site where the coated substrate is peeled off.   The coating substrate peeling means has a joined body supporting roller at a position facing the pressure applying roller, and the pressure applying roller adjusts a dimension of a gap between the pressure applying roller and the joined body supporting roller. 9. The apparatus for producing a catalyst layer-polymer electrolyte membrane assembly according to claim 8, wherein a gap adjusting mechanism is provided.

Images