JP2009231103A - Catalyst transfer sheet, manufacturing method of electrolyte membrane and catalyst layer assembly using sheet, manufacturing method of electrolyte membrane and electrode assembly, manufacturing method of electrode for polymer electrolyte fuel cell, and manufacturing method of polymer electrolyte fuel cell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance a yield by reducing peeling failure generating when a catalyst layer is transferred to an electrolyte membrane. <P>SOLUTION: Catalyst layer transfer sheets 1, 1' for transferring catalyst layers 3, 3' on an electrolyte membrane 5 of a polymer electrolyte fuel cell 30 include a sheet-like substrate 2 and a catalyst layer 3 formed wholly on one surface of the substrate 2, and a projecting part 4 is formed at right upper corner part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a catalyst layer transfer sheet, a method for producing an electrolyte membrane-catalyst layer assembly using the same, a method for producing an electrolyte membrane-electrode assembly, a method for producing an electrode for a polymer electrolyte fuel cell, and a solid high The present invention relates to a method for manufacturing a molecular fuel cell.

  A fuel cell is a cell in which electrodes are arranged on both sides of an electrolyte and generates electricity by an electrochemical reaction between hydrogen and oxygen, and only water is generated during power generation. Thus, unlike the conventional internal combustion engine, it is expected to spread as a next-generation clean energy system because it does not generate environmental load gas such as carbon dioxide. In particular, the polymer electrolyte fuel cell has a low operating temperature and low electrolyte resistance. In addition, it uses a highly active catalyst, so it can obtain high output even in a small size. Is expected to be put to practical use.

This solid polymer fuel cell uses a solid polymer electrolyte membrane having proton conductivity, and a catalyst layer and a gas diffusion layer are sequentially laminated on both surfaces of the electrolyte membrane. And it has the structure which has arrange | positioned the gasket so that the circumference | surroundings of the electrode which consists of this catalyst layer and a gas diffusion layer may be enclosed, and also this was pinched | interposed with the separator. (For example, refer to FIG. 1 of Patent Document 1). One method for forming the catalyst layer on the electrolyte membrane or the gas diffusion layer is to use a catalyst layer transfer sheet. In order to form a catalyst layer on an electrolyte membrane using this catalyst layer transfer sheet, first, two catalyst layer transfer sheets each having a catalyst layer formed on a substrate are prepared. It arrange | positions on both surfaces of an electrolyte membrane so that it may face the membrane side. Then, the catalyst layer is transferred onto the electrolyte membrane by applying heat press or the like from the back side of each catalyst layer transfer sheet, and then the catalyst layer is formed on the electrolyte membrane by peeling only the base material (patent) Reference 1).
JP 2006-286560 A

  However, in the method for forming a catalyst layer using the catalyst layer transfer sheet as described above, when the substrate is peeled off, the catalyst layer remains on the substrate side without being transferred onto the electrolyte membrane. May be peeled off. When the catalyst layer is peeled off together with the substrate without being transferred to the electrolyte membrane in this way, it is treated as a defective product called so-called peeling failure.

  Therefore, the present invention is a catalyst layer transfer sheet that can reduce the separation failure and improve the yield, a method for producing an electrolyte membrane-catalyst layer assembly using the same, a method for producing an electrolyte membrane-electrode assembly, It is another object of the present invention to provide a method for producing a polymer electrolyte fuel cell.

  The catalyst layer transfer sheet according to the present invention is made to solve the above problems, and is a catalyst layer transfer sheet for transferring and forming a catalyst layer on an electrolyte membrane of a polymer electrolyte fuel cell, A sheet-like base material and a catalyst layer formed on the entire one surface of the base material are provided, and a protrusion protruding outward from the outer peripheral edge is formed.

  The catalyst layer transfer sheet configured as described above is used to transfer the catalyst layer to the electrolyte membrane, but the peeling failure that occurs when the catalyst layer is transferred and the substrate is peeled off is It is very unlikely that a part of the substrate starts to peel off, that is, the outer peripheral edge of the base material, and the other part will have a peeling failure. Since the catalyst layer transfer sheet according to the present invention has protrusions protruding outward from the outer peripheral edge, even if a peeling failure occurs by peeling the base material from this protrusion, The generation location can be only the protrusion, and the catalyst layer in the portion other than the protrusion can be reliably transferred to the electrolyte membrane. For this reason, the catalyst layer is not transferred to the electrolyte membrane at the protrusions by designing the catalyst layer so that the battery performance is sufficiently ensured with the catalyst layer at the part other than the protrusions even if the separation failure occurs at the protrusions. However, it can be made into a non-defective product without being disposed of as defective peeling, and as a result, the yield can be improved.

  The catalyst layer transfer sheet can have various configurations. For example, it is preferable that the catalyst layer transfer sheet is formed in a rectangular shape in plan view and the protrusions are formed in corners. By forming the protrusions at the corners in this way, it is possible to facilitate the peeling operation of the base material.

  Moreover, it is preferable that an opposing protrusion that protrudes outward from the outer periphery is further formed at a position that faces the protrusion on the outer periphery. Since many peeling defects occur also in the part where the base material has been peeled off, the peeling defects can be further reduced by forming the opposing protrusions at positions facing the protrusions.

  Moreover, the manufacturing method of the electrolyte membrane-catalyst layer assembly according to the present invention has been made in order to solve the above-mentioned problems, and includes a step of preparing two of the catalyst layer transfer sheets described above, and an electrolyte. A step of preparing a membrane, a step of arranging each catalyst layer transfer sheet with the catalyst layer facing the electrolyte membrane so that the electrolyte membrane is sandwiched between the catalyst layer transfer sheets, and the catalyst layer transfer sheet A step of transferring the catalyst layer to both surfaces of the electrolyte membrane, and a step of peeling the base material from the protrusion.

  According to this method, when the base material of the catalyst layer transfer sheet is peeled off, it begins to peel from the protrusions. Therefore, even if a peeling failure occurs, the portion where the peeling failure occurs is only the protrusion. Therefore, the catalyst layer is not transferred to the electrolyte membrane at the protrusions by designing the catalyst layer so that sufficient battery performance can be secured with the catalyst layer at the part other than the protrusions even if the separation failure occurs at the protrusions. However, it is possible to make it a good product without disposing it as a peeling defect, and as a result, the yield can be improved.

  In addition, the manufacturing method of the electrolyte membrane-catalyst layer assembly may take various configurations. For example, the catalyst layer transfer sheet may have different protrusions in shape, position, or number. preferable. The protrusions only need to be able to distinguish between the anode catalyst layer and the cathode catalyst layer, and at least one of the shape, position, or number of the protrusions may be different. With this configuration, the anode catalyst layer and the cathode catalyst layer can be identified by the protrusions, and the anode catalyst layer and the cathode catalyst layer are mistakenly combined when assembling the electrolyte membrane-electrode assembly. Can be prevented.

  In addition, a method for producing an electrolyte membrane-electrode assembly according to the present invention is made to solve the above-described problems. The method for producing any one of the above electrolyte membrane-catalyst layer assemblies, and each of the catalyst layers described above. And a step of forming a gas diffusion layer thereon.

  According to this method, since any one of the above-described methods for producing an electrolyte membrane-catalyst layer assembly is provided, even if the catalyst layer is not transferred to the electrolyte membrane at the protrusions as described above, it is disposed as a defective peeling. The yield can be improved.

  A method for producing an electrode for a polymer electrolyte fuel cell according to the present invention has been made in order to solve the above-mentioned problems, and includes a step of preparing any one of the above catalyst layer transfer sheets, and a gas diffusion layer. A step of preparing, a step of arranging the catalyst layer transfer sheet on the gas diffusion layer with the catalyst layer facing the gas diffusion layer, and a step of transferring the catalyst layer of the catalyst layer transfer sheet onto the gas diffusion layer And peeling the base material from the protrusion.

  According to this method, when the base material of the catalyst layer transfer sheet is peeled off, it begins to peel from the protrusions. Therefore, even if a peeling failure occurs, the portion where the peeling failure occurs is only the protrusion. Therefore, the catalyst layer is transferred onto the gas diffusion layer at the protrusion by designing the catalyst layer so that sufficient battery performance can be ensured with the catalyst layer at the portion other than the protrusion even if the separation failure occurs at the protrusion. Even if it is not, it can be made into a non-defective product without being disposed as defective peeling, and as a result, the yield can be improved.

  Moreover, the manufacturing method of the electrolyte membrane-electrode assembly which concerns on this invention is made | formed in order to solve the said subject, and prepares the manufacturing method of said polymer electrolyte fuel cell electrode, and an electrolyte membrane And a step of arranging the electrode on the electrolyte membrane so that the catalyst layer faces the electrolyte membrane, and a step of joining the electrolyte layer and the catalyst layer formed on the gas diffusion layer. Yes.

  According to this method, since the method for producing an electrode for a polymer electrolyte fuel cell is provided, even if the catalyst layer is not transferred onto the gas diffusion layer at the protrusion as described above, it is disposed as a defective peeling. The yield can be improved.

  In addition, a method for producing a polymer electrolyte fuel cell according to the present invention has been made in order to solve the above-described problems. The method for producing the electrolyte membrane-electrode assembly, and the method for producing the electrolyte membrane-electrode assembly A step of installing a gasket so as to surround the periphery, and a step of installing a separator so as to sandwich the electrolyte membrane-electrode assembly.

  According to this method, since the method for manufacturing the electrolyte membrane-electrode assembly is provided, as described above, even if the catalyst layer is not transferred to the electrolyte membrane at the protrusion, And the yield can be improved.

  According to the present invention, it is possible to reduce peeling defects and improve yield.

  Hereinafter, an embodiment of a catalyst layer transfer sheet according to the present invention will be described with reference to the drawings. FIG. 1 is a plan view of the catalyst layer transfer sheet, and FIG. 2 is a front view of the catalyst layer transfer sheet.

  As shown in FIGS. 1 and 2, the catalyst layer transfer sheet 1 includes a base material 2 having a rectangular shape in plan view, and a catalyst layer 3 formed on the entire top surface of the base material 2. Further, as shown in FIG. 2, the catalyst layer transfer sheet 1 has a rectangular shape in plan view, and a protrusion 4 is formed at the upper right corner.

  Examples of the material of the substrate 2 include polyimide, polyethylene terephthalate, polyparvanic acid aramid, polyamide (nylon), polysulfone, polyethersulfone, polyphenylene sulfide, polyether ether ketone, polyetherimide, polyarylate, and polyethylene naphthalate. And polymer films such as polypropylene and polyolefin. Further, heat resistance of ethylene tetrafluoroethylene copolymer (ETFE), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), tetrafluoroperfluoroalkyl vinyl ether copolymer (PFA), polytetrafluoroethylene (PTFE), etc. Fluorine resin can also be used. Further, in addition to the polymer film, coated paper such as art paper, coated paper, and lightweight coated paper, and non-coated paper such as notebook paper and copy paper may be used. The thickness of the substrate 2 is usually about 6 to 100 μm, preferably about 10 to 30 μm, from the viewpoints of handleability and economy. Accordingly, the base material 2 is preferably a polymer film that is inexpensive and easily available, and more preferably polyethylene terephthalate.

  The material of the catalyst layer 3 is a known platinum-containing catalyst layer (cathode catalyst and anode catalyst). Specifically, the catalyst layer 3 contains carbon particles supporting catalyst particles and a hydrogen ion conductive polymer electrolyte. Examples of the catalyst particles include platinum and platinum compounds. Examples of the platinum compound include an alloy of platinum and at least one metal selected from the group consisting of ruthenium, palladium, nickel, molybdenum, iridium, iron and the like. In general, the catalyst particles contained in the cathode catalyst layer are platinum, and the catalyst particles contained in the anode catalyst layer are an alloy of the metal and platinum. Moreover, as a hydrogen ion conductive polymer electrolyte, the same material as what is used for the electrolyte membrane 5 mentioned later can be used. The thickness of the catalyst layer 3 is preferably 20 to 100 μm in the case of a direct methanol fuel cell, and preferably 15 to 30 μm in the case of a solid polymer fuel cell.

  Next, the manufacturing method of the catalyst layer transfer sheet 1 will be described. First, the above-described carbon particles supporting the catalyst particles and the hydrogen ion conductive polymer electrolyte are mixed and dispersed in an appropriate solvent to prepare a catalyst paste. . And a catalyst paste is apply | coated on a base material through a mold release layer as needed according to a well-known method so that the catalyst layer 3 formed may become a desired film thickness. Examples of the method for applying the catalyst paste include known coating methods such as screen printing, spray coating, die coating, and knife coating. And after apply | coating a catalyst paste, a catalyst layer is formed on a base material by drying at predetermined temperature and time. A drying temperature is about 40-100 degreeC normally, Preferably it is about 60-80 degreeC. Although depending on the drying temperature, the drying time is usually about 5 minutes to 2 hours, preferably about 10 minutes to 1 hour. The catalyst layer transfer sheet thus formed is cut out to form the catalyst layer transfer sheet 1 having a rectangular shape in plan view in which the protrusions 4 are formed at the corners as described above.

  Examples of the solvent used in preparing the catalyst paste include various alcohols, various ethers, various dialkyl sulfoxides, water, or a mixture thereof. Of these, alcohols are preferable. Examples of alcohols include monohydric alcohols having 1 to 4 carbon atoms such as methanol, ethanol, n-propanol, isopropanol, n-butanol, and tert-butanol, and various polyhydric alcohols.

  Next, a method for producing an electrolyte membrane-catalyst layer assembly, an electrolyte membrane-electrode assembly, and a polymer electrolyte fuel cell using the catalyst layer transfer film 1 will be described with reference to FIG.

  First, an electrolyte membrane 5 having a rectangular shape in plan view is prepared, and an anode catalyst layer transfer sheet 1 is disposed above the electrolyte membrane 5 so that the anode catalyst layer 3 faces the electrolyte membrane 5 side. Then, the cathode catalyst layer transfer sheet 1 ′ is disposed below the electrolyte membrane 5 so that the cathode catalyst layer 3 ′ faces the electrolyte membrane 5 side (FIG. 3A). The anode catalyst layer transfer sheet 1 is the same as the catalyst layer transfer sheet 1 described above, but the cathode catalyst layer transfer sheet 1 ′ can be distinguished from the cathode catalyst layer 3 ′ and the anode catalyst layer 3. The protrusion 4 ′ is formed at a position different from the protrusion 4 of the anode catalyst layer transfer sheet 1. That is, in the cathode catalyst layer transfer sheet 1 ′, the protrusion 4 ′ is formed not at the corner but at the center of the upper side as shown in FIG. 3.

  Next, heat pressing is performed from the back side of the catalyst layer transfer sheets 1, 1 ′ to transfer the anode catalyst layer 3 to the upper surface of the electrolyte membrane 5 and transfer the cathode catalyst layer 3 ′ to the lower surface of the electrolyte membrane 5. Then, the base material 2 of the anode catalyst layer transfer sheet 1 is peeled off from the protrusions 4 (FIG. 3B), and then the base material 2 ′ of the cathode catalyst layer transfer sheet 1 ′ is peeled off from the protrusions 4 ′ ( FIG. 3 (c)). As described above, the base materials 2 and 2 ′ of the catalyst layer transfer sheets 1 and 1 ′ are peeled to form the anode catalyst layer 3 on the upper surface of the electrolyte membrane 5 and the cathode catalyst layer 3 ′ on the lower surface. -The catalyst layer assembly 10 is produced (FIG. 3D). In consideration of workability, it is preferable to transfer the catalyst layers 3 and 3 ′ simultaneously on both sides in the step of transferring the catalyst layers 3 and 3 ′ to the electrolyte membrane 5, but the catalyst layers 3 and 3 ′ are formed on each side. You can also The pressure level of the heating press is usually about 0.5 to 20 MPa, preferably about 1 to 10 MPa in order to avoid transfer failure. In addition, it is preferable to heat the pressure surface during this pressure operation in order to minimize transfer defects. The heating temperature is usually 200 ° C. or lower, preferably 150 ° C. or lower, in order to avoid breakage or deformation of the electrolyte membrane 5. The catalyst layers 3 and 3 ′ transferred and formed on the electrolyte membrane 5 are designed so that desired battery performance can be sufficiently obtained at portions other than the protruding portions 4 and 4 ′.

  The gas diffusion layer 6 is laminated by thermocompression bonding on the catalyst layers 3 and 3 ′ of the electrolyte membrane-catalyst layer assembly 10 manufactured as described above, thereby manufacturing the electrolyte membrane-electrode assembly 20 (FIG. 3 (e)). Then, a frame-like gasket 7 is provided so as to surround each electrode E composed of the catalyst layers 3 and 3 ′ and the gas diffusion layer 6, and finally the separator 8 and the gas flow path 81 serve as the gas diffusion layer 6. The electrolyte membrane-electrode assembly 20 is sandwiched between the separator 8 so that the gas diffusion layer 6 and the separator 8 are electrically connected to each other. Thus, the polymer electrolyte fuel cell 30 is completed (FIG. 3 (f)).

  In addition, as a material of the said electrolyte membrane 5, it forms by apply | coating the solution containing a hydrogen ion conductive polymer electrolyte on a base material, and drying, for example. Examples of the hydrogen ion conductive polymer electrolyte include a perfluorosulfonic acid-based fluorine ion exchange resin, more specifically, a perfluorocarbonsulfonic acid-based resin in which the C—H bond of a hydrocarbon ion-exchange membrane is substituted with fluorine. Examples include polymers (PFS polymers). By introducing a fluorine atom having high electronegativity, it is chemically very stable, the dissociation degree of the sulfonic acid group is high, and high ion conductivity can be realized. Specific examples of such a hydrogen ion conductive polymer electrolyte include “Nafion” (registered trademark) manufactured by DuPont, “Flemion” (registered trademark) manufactured by Asahi Glass Co., Ltd., and “Aciplex” manufactured by Asahi Kasei Corporation. ”(Registered trademark),“ Gore Select ”(registered trademark) manufactured by Gore, and the like. The concentration of the hydrogen ion conductive polymer electrolyte contained in the hydrogen ion conductive polymer electrolyte-containing solution is usually about 5 to 60% by weight, preferably about 20 to 40% by weight. In addition, the film thickness of the electrolyte membrane 5 is about 20-250 micrometers normally, Preferably it is about 20-80 micrometers.

  Further, the material of the gas diffusion layer 6 is well known, and various gas diffusion layers constituting the fuel electrode and the air electrode can be used, and the fuel gas and the oxidant gas as the fuel are efficiently used as the catalyst layers 3, 3 ′. In order to supply to, it consists of a porous electroconductive base material. Examples of the porous conductive substrate include carbon paper and carbon cloth.

  As the material of the gasket 7, a material that has a strength sufficient to withstand hot pressing and has a gas barrier property that does not leak fuel and oxidant to the outside can be used. For example, a polyethylene terephthalate sheet, Examples thereof include a Teflon (registered trademark) sheet and a silicon rubber sheet.

  The material of the separator 8 is known and may be any conductive plate that is stable even in the environment inside the fuel cell. Generally, a carbon plate in which a gas flow path 81 is formed is used. In addition, the separator 8 is made of a metal such as stainless steel, and the metal surface is formed with a film made of a conductive material such as chromium, a platinum group metal or oxide thereof, a conductive polymer, or the separator is made of a metal. It is also possible to use a metal having a metal surface plated with a material such as silver, a platinum group composite oxide, or chromium nitride.

  As described above, according to the present embodiment, when the base material 2 is peeled off, it starts to peel from the protruding portion 4, so that even if a peeling failure occurs, the occurrence location can be suppressed only to the protruding portion 4. The catalyst layer 3 other than 4 can be normally transferred to the electrolyte membrane 5. Since the catalyst layer 3 is designed so that sufficient battery performance can be ensured in a portion excluding the protrusions 4, it can be handled as a non-defective product even if a peeling failure occurs, thereby improving yield. Can do. Further, since the anode catalyst layer 3 and the cathode catalyst layer 3 ′ are different in positions where the protrusions 4 and 4 ′ are formed, the anode catalyst layer 3 and the cathode catalyst layer 3 ′ are visually identified. In other words, it is possible to prevent mistakes in the combination during assembly of the electrolyte membrane-electrode assembly.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to these, A various change is possible unless it deviates from the meaning of this invention. For example, although only one protrusion 4 is formed for each catalyst layer transfer sheet 1 in the above embodiment, a plurality of protrusions 4 may be formed. In this case, as shown in FIG. 4, it is preferable to form a facing protrusion 41 at a position facing the protrusion 4. As a result, the part of the base material 2 that starts to be peeled is the protruding part 4, and the part that is completely peeled is the opposing protruding part 41. 41 can be formed to reduce peeling defects.

  Moreover, in the said embodiment, although the projection part 4 is formed in the planar view rectangular shape, for example, this projection part 4 is good also as taper shape, such as a planar view circular shape and a triangle as shown in FIG. . By making the protrusion 4 have a tapered shape, it becomes easier to peel off.

  In the above embodiment, the gas diffusion layer 6 is formed on the catalyst layer 3 after the catalyst layer 3 is transferred to the electrolyte membrane 5. However, as shown in FIG. The layer transfer sheet 1 is arranged so that the catalyst layer 3 faces the gas diffusion layer 6 (FIG. 6A), the catalyst layer 3 is transferred and formed on the gas diffusion layer 6 and the substrate 2 is peeled off from the protrusions 4. However, after forming the electrode E (FIG. 6C), this electrode E may be joined to the electrolyte membrane 5 (FIG. 6D). The electrode E is also formed on the lower surface of the electrolyte membrane 5 by the same method. Thereafter, gaskets and separators are installed in the same manner as in the above embodiment to complete the polymer electrolyte fuel cell.

It is a front view which shows embodiment of the catalyst layer transfer sheet which concerns on this invention. It is a top view which shows embodiment of the catalyst layer transfer sheet which concerns on this invention. It is explanatory drawing which shows the manufacturing method of the polymer electrolyte fuel cell which concerns on this invention. It is a top view which shows another embodiment of the catalyst layer transfer sheet which concerns on this invention. It is a top view which shows another embodiment of the catalyst layer transfer sheet which concerns on this invention. It is explanatory drawing which shows another manufacturing method of the polymer electrolyte fuel cell which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Catalyst layer transfer sheet 2 Base material 3 Catalyst layer 4 Protrusion part 41 Opposite protrusion part 5 Electrolyte membrane 6 Gas diffusion layer 7 Gasket 8 Separator 10 Electrolyte membrane-catalyst layer assembly 20 Electrolyte membrane-electrode assembly 30 Solid polymer fuel battery

Claims (9)

A catalyst layer transfer sheet for transferring and forming a catalyst layer of a polymer electrolyte fuel cell,
A sheet-like substrate;
A catalyst layer formed on one whole surface of the base material,
A catalyst layer transfer sheet in which a protrusion protruding outward from an outer peripheral edge is formed.   The catalyst layer transfer sheet according to claim 1, wherein the catalyst layer transfer sheet is formed in a rectangular shape in plan view, and the protrusions are formed at corners.   3. The catalyst layer transfer sheet according to claim 1, wherein an opposing protrusion that protrudes outward from the outer periphery is further formed at a position facing the protrusion on the outer periphery. Preparing two catalyst layer transfer sheets according to any one of claims 1 to 3,
A step of preparing an electrolyte membrane;
Arranging each catalyst layer transfer sheet with the catalyst layer facing the electrolyte membrane so as to sandwich the electrolyte membrane between the catalyst layer transfer sheets;
Transferring the catalyst layer of the catalyst layer transfer sheet to both surfaces of the electrolyte membrane;
Peeling the base material from the protrusion,
A method for producing an electrolyte membrane-catalyst layer assembly comprising:   The method for producing an electrolyte membrane-catalyst layer assembly according to claim 4, wherein the catalyst layer transfer sheet is different in shape, position, or number of the protrusions. A method for producing the electrolyte membrane-catalyst layer assembly according to claim 4 or 5,
Forming a gas diffusion layer on each catalyst layer;
A method for producing an electrolyte membrane-electrode assembly, comprising: Preparing a catalyst layer transfer sheet according to any one of claims 1 to 3,
Preparing a gas diffusion layer;
Placing the catalyst layer transfer sheet on the gas diffusion layer with the catalyst layer facing the gas diffusion layer side;
Transferring the catalyst layer of the catalyst layer transfer sheet onto the gas diffusion layer;
Peeling the base material from the protrusion,
A method for producing a polymer electrolyte fuel cell electrode comprising: A method for producing a polymer electrolyte fuel cell electrode according to claim 7,
A step of preparing an electrolyte membrane;
Disposing the electrode on the electrolyte membrane such that the catalyst layer faces the electrolyte membrane side;
Joining the catalyst layer formed on the gas diffusion layer and the electrolyte membrane;
A method for producing an electrolyte membrane-electrode assembly, comprising: A method for producing the electrolyte membrane-electrode assembly according to claim 6 or 8,
Installing a gasket so as to surround the periphery of the electrolyte membrane-electrode assembly;
Installing a separator so as to sandwich the electrolyte membrane-electrode assembly;
A method for producing a polymer electrolyte fuel cell comprising:

Images