JP5638508B2 - Manufacturing method of electrolyte membrane / electrode structure with resin frame for fuel cell - Google Patents

Description

  The present invention relates to a method for producing an electrolyte membrane / electrode structure with a resin frame for a fuel cell, comprising a step MEA and a resin frame member.

  In general, a polymer electrolyte fuel cell employs a polymer electrolyte membrane made of a polymer ion exchange membrane. This fuel cell comprises an electrolyte membrane / electrode structure in which an anode electrode and a cathode electrode each comprising a catalyst layer (electrode catalyst layer) and a gas diffusion layer (porous carbon) are disposed on both sides of a solid polymer electrolyte membrane ( MEA) is sandwiched between separators (bipolar plates). A predetermined number of fuel cells are stacked to form a fuel cell stack, and the fuel cell is used as, for example, an in-vehicle fuel cell stack.

  In this type of electrolyte membrane / electrode structure, one gas diffusion layer is set to have a smaller surface area than the solid polymer electrolyte membrane, and the other gas diffusion layer is set to the same surface area as the solid polymer electrolyte membrane. In other words, a so-called step type MEA may be formed. At that time, in order to reduce the amount of the relatively expensive solid polymer electrolyte membrane used, and to protect the solid polymer electrolyte membrane having a thin film shape and low strength, an MEA with a frame incorporating a resin frame member is adopted. Has been.

  For example, a membrane electrode assembly disclosed in Patent Document 1 is known. In this membrane electrode assembly, as shown in FIG. 7, a catalyst layer 2 a and a gas diffusion layer 3 a having a planar dimension smaller than that of the ion conductive membrane 1 are provided on one surface of the ion conductive membrane 1.

  On one surface of the ion conductive film 1, there is a surface 1a that is not supported by the gas diffusion layer 3a. On the other surface of the ion conductive film 1, a catalyst layer 2b and a gas diffusion layer 3b are provided over the entire surface of the ion conductive film 1. The ion conductive film 1 is provided with a sealing member 4 for sealing the edges of the gas diffusion layers 3a and 3b and the surface 1a.

Special table 2009-514144 gazette

  By the way, in Patent Document 1 described above, when the sealing member 4 is joined to the ion conductive film 1, the surface 1 a of the ion conductive film 1 and the inner peripheral surface 4 a of the sealing member 4 are usually bonded to the adhesive 5. It is joined by. Further, the outer peripheral portion 3be of the gas diffusion layer 3b and the inner peripheral protrusion 4b of the sealing member 4 are joined by the resin impregnated portion 6. The resin impregnated portion 6 is formed, for example, by melting a part of the sealing member 4 or by melting another resin member.

  However, when the surface 1a of the ion conductive film 1 and the inner peripheral surface 4a of the sealing member 4 are joined by the adhesive 5, the adhesive 5 is bonded to the outer peripheral portion 3be of the gas diffusion layer 3b and the sealing member. There is a risk of flowing between the four inner circumferential protrusions 4b. For this reason, the adhesive 5 may permeate into the gas diffusion layer 3b, and the holes of the gas diffusion layer 3b may be blocked. Thereby, there is a problem that the resin impregnated portion 6 is not formed well and the bonding strength is lowered.

  The present invention solves this kind of problem, and it is possible to join the resin frame member firmly and easily by circling the outer periphery of the solid polymer electrolyte membrane constituting the step MEA in a simple process. An object of the present invention is to provide a method for producing an electrolyte membrane / electrode structure with a resin frame for a fuel cell.

  In the present invention, a first electrode having a first catalyst layer and a first gas diffusion layer is disposed on one surface of a solid polymer electrolyte membrane, and a second electrode is disposed on the other surface of the solid polymer electrolyte membrane. An electrolyte membrane in which a second electrode having a catalyst layer and a second gas diffusion layer is disposed, and a planar dimension of the first gas diffusion layer is set larger than a planar dimension of the second gas diffusion layer The electrode structure and the outer periphery of the solid polymer electrolyte membrane are configured to constitute a thin-walled inner peripheral protrusion that protrudes toward the second gas diffusion layer, and a proximal end portion of the inner peripheral protrusion, The present invention relates to a method of manufacturing an electrolyte membrane / electrode structure with a resin frame for a fuel cell, comprising a resin frame member provided with an inner wall portion facing an outer peripheral end of the first gas diffusion layer.

  This manufacturing method includes a first step of circulating the outer periphery of the second gas diffusion layer and joining the solid polymer electrolyte membrane and the inner peripheral projection of the resin frame member with an adhesive layer.

And a 1st process is located in the vicinity of an inner-wall part to the inner peripheral protrusion part of the resin-made frame members, and after the said 1st adhesive is semi-hardened, A second adhesive is applied to a range of the inner peripheral protrusion that is farther from the inner wall than the application range of the first adhesive, and a solid polymer electrolyte is formed by the first adhesive and the second adhesive. A step of joining the outer peripheral edge of the film and the inner peripheral protrusion of the resin frame member.

  Here, that the adhesive is semi-cured means, for example, a hardness of 10% to 80% at the time of complete curing in measurement with a rubber hardness meter. The measurement with a rubber hardness meter (durometer) is based on, for example, JIS K 6250.

Further, in this manufacturing method, the second step of bonding the inner wall portion of the outer peripheral edge and the resin frame member of the first gas diffusion layer, a resin-impregnated part where the molten resin is impregnated prior Kigaishu end It is preferable to have.

Furthermore, in this manufacturing method, it is preferable that the resin frame member is integrally provided with a protrusion that constitutes the resin-impregnated portion, and the protrusion is melted at an outer peripheral end portion to form the resin-impregnated portion. .

  Furthermore, in this manufacturing method, it is preferable to use the same adhesive for the first adhesive and the second adhesive.

  According to the present invention, after the first adhesive is applied to the inner peripheral protrusion of the resin frame member in the vicinity of the inner wall portion, and the first adhesive is semi-cured, the inner peripheral protrusion Further, the second adhesive is applied to a range other than the application range of the first adhesive.

  Therefore, when the outer peripheral edge of the solid polymer electrolyte membrane and the inner peripheral protrusion of the resin frame member are joined by the first adhesive and the second adhesive, the first adhesive is Does not flow between the portion and the outer peripheral portion of the first gas diffusion layer. Therefore, it is possible to reliably prevent the first adhesive from penetrating into the first gas diffusion layer and blocking the pores of the first gas diffusion layer.

  Thereby, in a simple process, the resin-impregnated portion is formed satisfactorily and the bonding strength is improved, and the resin frame member is firmly and easily joined around the outer periphery of the solid polymer electrolyte membrane constituting the step MEA. It becomes possible.

It is a principal part disassembled perspective explanatory view of a polymer electrolyte fuel cell in which an electrolyte membrane / electrode structure with a resin frame manufactured by a manufacturing method according to an embodiment of the present invention is incorporated. FIG. 2 is a sectional view of the fuel cell taken along line II-II in FIG. 1. It is front explanatory drawing by the side of the cathode electrode of the said electrolyte membrane-electrode structure with a resin frame. It is explanatory drawing of the method to manufacture the said electrolyte membrane-electrode structure with a resin frame. It is explanatory drawing of the method to manufacture the said electrolyte membrane-electrode structure with a resin frame. It is explanatory drawing of the method to manufacture the said electrolyte membrane-electrode structure with a resin frame. It is explanatory drawing of the membrane electrode assembly disclosed by patent document 1. FIG.

  As shown in FIGS. 1 and 2, an electrolyte membrane / electrode structure 10 with a resin frame manufactured by a manufacturing method according to an embodiment of the present invention is incorporated in a polymer electrolyte fuel cell 12. For example, an in-vehicle fuel cell stack is configured by stacking a plurality of fuel cells 12 in the direction of arrow A.

  In the fuel cell 12, the electrolyte membrane / electrode structure 10 with a resin frame is sandwiched between the first separator 14 and the second separator 16. The first separator 14 and the second separator 16 are made of, for example, a steel plate, a stainless steel plate, an aluminum plate, a plated steel plate, a metal plate whose surface is subjected to anticorrosion treatment, a carbon member, or the like. .

  As shown in FIG. 2, the electrolyte membrane / electrode structure 10 with a resin frame includes an electrolyte membrane / electrode structure 10a. The electrolyte membrane / electrode structure 10a includes, for example, a solid polymer electrolyte membrane 18 in which a perfluorosulfonic acid thin film is impregnated with water, a cathode electrode (first electrode) 20 sandwiching the solid polymer electrolyte membrane 18, and And an anode electrode (second electrode) 22. The solid polymer electrolyte membrane 18 uses an HC (hydrocarbon) electrolyte in addition to a fluorine electrolyte.

  The anode electrode 22 has a smaller surface area than the solid polymer electrolyte membrane 18 and the cathode electrode 20. The cathode electrode 20 may have a smaller surface area than the anode electrode 22.

  The cathode electrode 20 is disposed on one surface 18 a of the solid polymer electrolyte membrane 18, and the anode electrode 22 is disposed on the other surface 18 b of the solid polymer electrolyte membrane 18.

  The cathode electrode 20 includes a first electrode catalyst layer (first catalyst layer) 20a joined to the surface 18a of the solid polymer electrolyte membrane 18, and a first gas diffusion layer 20b laminated on the first electrode catalyst layer 20a. Have The first electrode catalyst layer 20a and the first gas diffusion layer 20b are set to the same surface dimension.

  The anode electrode 22 includes a second electrode catalyst layer (second catalyst layer) 22a joined to the surface 18b of the solid polymer electrolyte membrane 18, and a second gas diffusion layer 22b laminated on the second electrode catalyst layer 22a. Have The second electrode catalyst layer 22a and the second gas diffusion layer 22b are set to the same surface dimension. The first electrode catalyst layer 20a has a larger surface area than the second electrode catalyst layer 22a, but the first electrode catalyst layer 20a and the second electrode catalyst layer 22a are set to have the same surface area. Also good.

  The first electrode catalyst layer 20a and the second electrode catalyst layer 22a are formed by forming catalyst particles in which platinum particles are supported on carbon black, using a polymer electrolyte as an ion conductive binder, and in the solution of the polymer electrolyte. The catalyst paste prepared by uniformly mixing the catalyst particles is configured by printing, applying or transferring the catalyst paste onto both surfaces 18a and 18b of the solid polymer electrolyte membrane 18.

  The first gas diffusion layer 20b and the second gas diffusion layer 22b are formed by applying an underlayer containing carbon black and PTFE (polytetrafluoroethylene) particles to carbon paper. The underlayer has the same surface dimensions as the carbon paper. In addition, what is necessary is just to provide a base layer as needed. The planar dimension of the first gas diffusion layer 20b is set to be larger than the planar dimension of the second gas diffusion layer 22b.

  As shown in FIGS. 1 and 2, the electrolyte membrane / electrode structure 10 with a resin frame circulates around the outer periphery of the solid polymer electrolyte membrane 18 and is joined to the anode electrode 22 and the cathode electrode 20. 24. The resin frame member 24 is, for example, PPS (polyphenylene sulfide), PPA (polyphthalamide), PEN (polyethylene naphthalate), PES (polyethersulfone), LCP (liquid crystal polymer), PVDF (polyvinylidene fluoride). , Silicone rubber, fluorine rubber or EPDM (ethylene propylene rubber).

  The resin frame member 24 includes a thin-walled inner peripheral protrusion 24a that protrudes toward the outer peripheral side of the anode electrode 22 and contacts the outer peripheral edge 18be of the solid polymer electrolyte membrane 18, and a proximal end portion of the inner peripheral protrusion 24a. And an inner wall portion 24b facing the outer peripheral end portion 20be of the first gas diffusion layer 20b. The inner peripheral protrusion 24 a has the same thickness as the anode electrode 22.

  The inner peripheral protrusion 24 a of the resin frame member 24 and the outer peripheral edge 18 be of the solid polymer electrolyte membrane 18 are bonded by an adhesive layer 26. For the adhesive layer 26, for example, an ester-based or urethane-based hot melt adhesive is used. The melting temperature of the hot melt adhesive is, for example, 150 ° C. to 170 ° C., and the melting temperature of the resin frame member 24 is, for example, 360 ° C. The resin frame member 24 and the first gas diffusion layer 20 b of the cathode electrode 20 are integrated by the resin impregnated portion 28. As will be described later, the resin impregnated portion 28 is constituted by a resin protrusion 28 a that is integrally formed with the resin frame member 24.

  As shown in FIG. 3, the adhesive layer 26 is formed in a frame shape over the entire circumference of the outer peripheral edge 18 be of the solid polymer electrolyte membrane 18. The resin impregnated portion 28 is formed in a frame shape over the entire circumference of the first gas diffusion layer 20b constituting the cathode electrode 20.

  As shown in FIG. 1, one end edge of the fuel cell 12 in the arrow B direction (horizontal direction in FIG. 1) communicates with each other in the arrow A direction, which is the stacking direction, and contains an oxidant gas, for example, oxygen An oxidant gas inlet communication hole 30a for supplying gas, a cooling medium inlet communication hole 32a for supplying a cooling medium, and a fuel gas outlet communication hole 34b for discharging a fuel gas, for example, a hydrogen-containing gas, Arranged in the direction of arrow C (vertical direction).

  The other end edge of the fuel cell 12 in the direction of arrow B communicates with each other in the direction of arrow A, a fuel gas inlet communication hole 34a for supplying fuel gas, and a cooling medium outlet communication hole for discharging the cooling medium. 32b and an oxidant gas outlet communication hole 30b for discharging the oxidant gas are arranged in the direction of arrow C.

  An oxidant gas flow path 36 communicating with the oxidant gas inlet communication hole 30a and the oxidant gas outlet communication hole 30b is provided on the surface 16a of the second separator 16 facing the electrolyte membrane / electrode structure 10 with a resin frame. .

  A fuel gas flow path 38 communicating with the fuel gas inlet communication hole 34a and the fuel gas outlet communication hole 34b is formed on the surface 14a of the first separator 14 facing the electrolyte membrane / electrode structure 10 with a resin frame. Between the surface 14 b of the first separator 14 and the surface 16 b of the second separator 16, a cooling medium flow path 40 communicating with the cooling medium inlet communication hole 32 a and the cooling medium outlet communication hole 32 b is formed.

  As shown in FIGS. 1 and 2, the first seal member 42 is integrated with the surfaces 14 a and 14 b of the first separator 14 around the outer peripheral end of the first separator 14. The second seal member 44 is integrated with the surfaces 16 a and 16 b of the second separator 16 around the outer peripheral end portion of the second separator 16.

  As shown in FIG. 2, the first seal member 42 includes a first convex seal 42 a that contacts the inner peripheral protrusion 24 a of the resin frame member 24 constituting the electrolyte membrane / electrode structure 10 with resin frame, And a second convex seal 42b in contact with the second seal member 44 of the two separator 16. The second seal member 44 constitutes a flat seal having a flat surface that contacts the second convex seal 42b. Instead of the second convex seal 42b, the second seal member 44 may be provided with a convex seal (not shown).

  The first and second sealing members 42 and 44 include, for example, EPDM, NBR, fluorine rubber, silicone rubber, fluorosilicone rubber, butyl rubber, natural rubber, styrene rubber, chloroprene or acrylic rubber, a cushioning material, Alternatively, a packing material is used.

  As shown in FIG. 1, the first separator 14 has a supply hole portion 46 that communicates the fuel gas inlet communication hole 34a with the fuel gas passage 38, and the fuel gas passage 38 communicates with the fuel gas outlet communication hole 34b. A discharge hole 48 is formed.

  Next, a method for producing the resin frame-attached electrolyte membrane / electrode structure 10 will be described below.

  First, as shown in FIG. 4, an electrolyte membrane / electrode structure 10a which is a step MEA is produced. Specifically, a binder solution is put into a mixture of a catalyst and a solvent, and an electrode ink obtained by applying screen ink to a PET sheet made of a PET film with electrode ink mixed up to a predetermined ink clay is formed, and the electrode Hot pressing is performed with the solid polymer electrolyte membrane 18 sandwiched between the sheets. Then, the first electrode catalyst layer 20a and the second electrode catalyst layer 22a are formed on the surface 18a and the surface 18b of the solid polymer electrolyte membrane 18 by peeling the PET sheet.

  Furthermore, in the manufacturing process of the first gas diffusion layer 20b and the second gas diffusion layer 22b, a slurry in which a mixture containing carbon black and PTFE (polytetrafluoroethylene) particles is uniformly dispersed in ethylene glycol is formed. The slurry is applied to carbon paper and dried to produce a first gas diffusion layer 20b and a second gas diffusion layer 22b composed of the carbon paper and a base layer.

  Therefore, the first gas diffusion layer 20b is disposed on the surface 18a side of the solid polymer electrolyte membrane 18, that is, the first electrode catalyst layer 20a, and the first polymer gas diffusion layer 20b is disposed on the surface 18b of the solid polymer electrolyte membrane 18. The second gas diffusion layer 22b is disposed on the two-electrode catalyst layer 22a. The electrolyte membrane / electrode structure 10a is manufactured by stacking these together and subjecting them to hot pressing.

  On the other hand, the resin frame member 24 is preliminarily molded by injection molding using a mold (not shown). The resin frame member 24 has a thin inner peripheral projection 24a, and a resin for projecting in the thickness direction to form a resin impregnated portion 28 on the surface opposite to the inner peripheral projection 24a. The protrusion 28a is integrally formed.

  Next, the first adhesion that constitutes the adhesive layer 26 is located on the inner peripheral protrusion 24a of the resin frame member 24 in the vicinity of the inner wall 24b (near the outer peripheral end 20be of the first gas diffusion layer 20b). Agent 26a is applied. The first adhesive 26a is semi-cured by being heated to a predetermined temperature for a predetermined time. The first adhesive 26a being semi-cured means, for example, a hardness of 10% to 80% at the time of complete curing in measurement with a rubber hardness meter. The measurement with a rubber hardness meter (durometer) is based on, for example, JIS K 6250.

  After the first adhesive 26a reaches the semi-cured state, the inner peripheral protrusion 24a of the resin frame member 24 has a range other than the application range of the first adhesive 26a (at least a part separated from the inner wall 24b). The second adhesive 26b is applied to (see FIG. 5).

  The second adhesive 26b is provided across the entire surface in the range h (0.5 mm to 2 mm) while providing a gap s between the second adhesive 26b and the first adhesive 26a. As the second adhesive 26b, the same adhesive as the first adhesive 26a is used, but a different adhesive may be used.

  Then, the inner wall portion 24b of the resin frame member 24 and the outer peripheral end portion 20be of the first gas diffusion layer 20b of the electrolyte membrane / electrode structure 10a are aligned, and the first adhesive 26a and the second adhesive 26b are aligned. While being heated, a load (press or the like) is applied. Thereby, the inner peripheral protrusion 24 a of the resin frame member 24 and the outer peripheral edge 18 be of the solid polymer electrolyte membrane 18 are bonded via the adhesive layer 26. When bonded, the curing rate of the first adhesive 26a is higher than the curing rate of the second adhesive 26b.

  Further, as shown in FIG. 6, in the state where the electrolyte membrane / electrode structure 10a and the resin frame member 24 are aligned, a load is applied, and the resin protrusion 28a of the resin frame member 24 is Heated. As the heating method, laser welding, infrared welding, impulse welding, or the like is employed.

  Therefore, the resin protrusion 28 a is heated and melted, and the resin protrusion 28 a is impregnated in the first gas diffusion layer 20 b constituting the cathode electrode 20. Thereby, the electrolyte membrane and electrode structure 10 with a resin frame is manufactured.

  As shown in FIG. 2, the resin membrane-attached electrolyte membrane / electrode structure 10 is sandwiched between the first separator 14 and the second separator 16. The first separator 14 abuts on the inner peripheral protrusion 24 a of the resin frame member 24 and applies a load to the electrolyte membrane / electrode structure 10 with a resin frame together with the second separator 16. Furthermore, a predetermined number of fuel cells 12 are stacked to form a fuel cell stack, and a clamping load is applied between end plates (not shown).

  The operation of the fuel cell 12 configured as described above will be described below.

  First, as shown in FIG. 1, an oxidant gas such as an oxygen-containing gas is supplied to the oxidant gas inlet communication hole 30a, and a fuel gas such as a hydrogen-containing gas is supplied to the fuel gas inlet communication hole 34a. Further, a cooling medium such as pure water, ethylene glycol, or oil is supplied to the cooling medium inlet communication hole 32a.

  For this reason, the oxidant gas is introduced into the oxidant gas flow path 36 of the second separator 16 from the oxidant gas inlet communication hole 30a, and moves in the direction of arrow B to the cathode electrode 20 of the electrolyte membrane / electrode structure 10a. Supplied. On the other hand, the fuel gas is introduced from the fuel gas inlet communication hole 34 a through the supply hole 46 into the fuel gas flow path 38 of the first separator 14. The fuel gas moves in the direction of arrow B along the fuel gas flow path 38 and is supplied to the anode electrode 22 of the electrolyte membrane / electrode structure 10a.

  Therefore, in each electrolyte membrane / electrode structure 10a, the oxidant gas supplied to the cathode electrode 20 and the fuel gas supplied to the anode electrode 22 are consumed by an electrochemical reaction in the electrode catalyst layer to generate power. Done.

  Next, the oxidant gas consumed by being supplied to the cathode electrode 20 is discharged in the direction of arrow A along the oxidant gas outlet communication hole 30b. Similarly, the fuel gas consumed by being supplied to the anode electrode 22 passes through the discharge hole 48 and is discharged in the direction of arrow A along the fuel gas outlet communication hole 34b.

  The cooling medium supplied to the cooling medium inlet communication hole 32a is introduced into the cooling medium flow path 40 between the first separator 14 and the second separator 16, and then flows in the direction of arrow B. The cooling medium is discharged from the cooling medium outlet communication hole 32b after the electrolyte membrane / electrode structure 10a is cooled.

  In this case, in this embodiment, as shown in FIG. 4, the first adhesive 26 a constituting the adhesive layer 26 is located in the vicinity of the inner wall portion 24 b on the inner peripheral protrusion 24 a of the resin frame member 24. Is applied. Then, as shown in FIG. 5, after the first adhesive 26a reaches a semi-cured state, the inner peripheral projection 24a of the resin frame member 24 has a first area 26 in a range other than the application range of the first adhesive 26a. 2 Adhesive 26b is applied.

  For this reason, when the outer peripheral edge 18be of the solid polymer electrolyte membrane 18 and the inner peripheral protrusion 24a of the resin frame member 24 are joined by the first adhesive 26a and the second adhesive 26b, the first adhesive 26a. Does not flow between the inner wall portion 24b constituting the base end portion of the inner peripheral protrusion 24a and the outer peripheral end portion 20be of the first gas diffusion layer 20b. This is because the first adhesive 26a is in a semi-cured state, has a relatively high viscosity, and has reduced fluidity. In addition, since the 1st adhesive agent 26a is a semi-hardened state, the desired adhesiveness is ensured.

  Accordingly, it is possible to reliably prevent the first adhesive 26a from entering the first gas diffusion layer 20b and closing the pores of the first gas diffusion layer 20b. As a result, the resin impregnated portion 28 is not formed satisfactorily, and it is possible to reliably suppress a decrease in the bonding strength between the electrolyte membrane / electrode structure 10a and the resin frame member 24. It is done.

  Thereby, the resin frame member 24 can be firmly and easily joined around the outer periphery of the solid polymer electrolyte membrane 18 constituting the electrolyte membrane / electrode structure 10a which is the step MEA by a simple process.

  In the present embodiment, the resin-impregnated portion 28 is configured by the resin protrusion 28a integrally formed with the resin frame member 24, but is not limited thereto. For example, a resin member separate from the resin frame member 24 is prepared, and the resin member is melted across the resin frame member 24 and the first gas diffusion layer 20b, thereby forming the resin impregnated portion 28. May be.

DESCRIPTION OF SYMBOLS 10 ... Electrolyte membrane / electrode structure with resin frame 10a ... Electrolyte membrane / electrode structure 12 ... Fuel cell 14, 16 ... Separator 18 ... Solid polymer electrolyte membrane 20 ... Cathode electrode 20a, 22a ... Electrode catalyst layer 20b, 22b ... Gas diffusion layer 22 ... Anode electrode 24 ... Resin frame member 24a ... Inner peripheral projection 24b ... Inner wall portion 26 ... Adhesive layer 26a, 26b ... Adhesive 28 ... Resin impregnated portion 28a ... Resin projection 30a ... Oxidant gas inlet Communication hole 30b ... Oxidant gas outlet communication hole 32a ... Cooling medium inlet communication hole 32b ... Cooling medium outlet communication hole 34a ... Fuel gas inlet communication hole 34b ... Fuel gas outlet communication hole 36 ... Oxidant gas flow path 38 ... Fuel gas flow Channel 40: Cooling medium channel 42, 44: Seal member

Claims (4)

A first electrode having a first catalyst layer and a first gas diffusion layer is disposed on one surface of the solid polymer electrolyte membrane, and a second catalyst layer and a second electrode are disposed on the other surface of the solid polymer electrolyte membrane. An electrolyte membrane / electrode structure in which a second electrode having two gas diffusion layers is disposed, and a planar dimension of the first gas diffusion layer is set to be larger than a planar dimension of the second gas diffusion layer When,
A thin-walled inner peripheral protrusion projecting around the outer periphery of the solid polymer electrolyte membrane and projecting toward the second gas diffusion layer, and a base end portion of the inner peripheral protrusion, and comprising the first gas diffusion layer A resin frame member provided with an inner wall portion facing the outer peripheral end portion of
A method for producing an electrolyte membrane / electrode structure with a resin frame for a fuel cell, comprising:
Having a first step of joining the solid polymer electrolyte membrane and the inner peripheral protrusion of the resin frame member by an adhesive layer around the outer periphery of the second gas diffusion layer;
The first step is a step of applying a first adhesive to the inner peripheral protrusion of the resin frame member in the vicinity of the inner wall portion; and
After the first adhesive is semi-cured, a second adhesive is applied to a range of the inner peripheral protrusion that is farther from the inner wall than the application range of the first adhesive, and the first adhesive And bonding the outer peripheral edge of the solid polymer electrolyte membrane and the inner peripheral protrusion of the resin frame member with the second adhesive,
A method for producing an electrolyte membrane / electrode structure with a resin frame for a fuel cell, comprising: The manufacturing method of claim 1, wherein an outer peripheral edge portion of the first gas diffusion layer and the inner wall portion of the resin frame member, prior to bonding a resin-impregnated part where the molten resin is impregnated into Kigaishu end The manufacturing method of the electrolyte membrane and electrode structure with a resin frame for fuel cells characterized by having the 2nd process to do.   3. The manufacturing method according to claim 2, wherein the resin frame member is integrally provided with a protrusion that constitutes the resin-impregnated portion, and the protrusion is melted at the outer peripheral end portion to form the resin-impregnated portion. A method for producing an electrolyte membrane / electrode structure with a resin frame for a fuel cell.   4. The manufacturing method according to claim 1, wherein the first adhesive and the second adhesive use the same adhesive. -Manufacturing method of an electrode structure.

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