JP6092060B2 - Electrolyte membrane / electrode structure with resin frame for fuel cells - Google Patents

Description

  The present invention relates to an electrolyte membrane with a resin frame for a fuel cell, comprising: a step MEA in which a solid polymer electrolyte membrane is sandwiched between a first electrode and a second electrode; and a resin frame member provided around the outer periphery of the step MEA. The present invention relates to an electrode structure.

  In general, a polymer electrolyte fuel cell employs a polymer electrolyte membrane made of a polymer ion exchange membrane. A fuel cell has an electrolyte membrane / electrode structure (MEA) 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. ). The electrolyte membrane / electrode structure is sandwiched between separators (bipolar plates) to constitute a fuel cell. This fuel cell is used as, for example, an in-vehicle fuel cell stack by stacking a predetermined number of fuel cells.

  In the electrolyte membrane / electrode structure, one gas diffusion layer is set to a plane size smaller than that of the solid polymer electrolyte membrane, and the other gas diffusion layer is set to the same plane size as the solid polymer electrolyte membrane. In other words, a so-called step 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 resin frame incorporating a resin frame member is adopted. Has been.

  As this type of MEA with a resin frame, for example, an electrolyte membrane-electrode assembly disclosed in Patent Document 1 is known. In this electrolyte membrane-electrode assembly, as shown in FIG. 7, the membrane 1, the anode catalyst layer 2 a disposed on one side of the membrane 1, and the cathode catalyst disposed on the other side of the membrane 1 Layer 3a. GDL (gas diffusion layer) 2b and GDL 3b are provided on both surfaces of the film 1, and the area (planar dimension) on the anode side of the GDL 2b is larger than the area of the cathode side of the GDL 3b. ing.

  In the edge region of the MEA, a gasket structure 4 in which a cathode layer and an anode side gasket layer arranged at least in a part around the ends of the anode catalyst layer 2a and the cathode catalyst layer 3a are integrated is arranged. Yes. At least the outer peripheral portion of the film 1 on the side having a small GDL area (GDL 3 b side) and the gasket structure 4 are bonded via an adhesive layer 5.

JP 2007-66766 A

  However, in the above-described electrolyte membrane-electrode assembly, the outer peripheral portion of the membrane 1 and the gasket structure 4 are only joined through the adhesive layer 5 only. For this reason, there is a problem that the bonding strength between the membrane 1 and the gasket structure 4 tends to decrease, and the membrane 1 and the gasket structure 4 are separated.

  The present invention solves this type of problem. With a simple configuration, the resin frame member is firmly joined around the outer periphery of the solid polymer electrolyte membrane constituting the step MEA, and the adhesive is deteriorated. An object of the present invention is to provide an electrolyte membrane / electrode structure with a resin frame for a fuel cell capable of suppressing the above as much as possible.

  In the electrolyte membrane / electrode structure with a resin frame for a fuel cell according to the present invention, a first electrode having a first catalyst layer and a first diffusion layer is provided on one surface of the solid polymer electrolyte membrane. A second electrode having a second catalyst layer and a second diffusion layer is provided on the other surface of the solid polymer electrolyte membrane, and the planar dimension of the first electrode is larger than the planar dimension of the second electrode. Is set. A resin frame member is provided around the outer periphery of the solid polymer electrolyte membrane.

  The resin frame member has a thin-walled inner bulging portion that bulges from the inner peripheral base end to the second electrode side, and the inner bulging portion circulates a contact portion with the electrolyte membrane / electrode structure. An adhesive application part to which the adhesive is applied is provided. A resin impregnated portion in which the first electrode and the resin frame member are integrated is provided at the inner peripheral base end portion of the resin frame member by impregnating the outer peripheral end portion of the first electrode with a resin material. Yes. A heat insulating space is formed between the adhesive application portion and the resin impregnation portion.

  In the electrolyte membrane / electrode structure with a resin frame for a fuel cell, it is preferable that the inner bulging portion forms a circular recess that circulates around a contact portion with the electrolyte membrane / electrode structure. The circumferential concave portion includes an adhesive application portion and a heat insulating space portion, and a circumferential convex portion that protrudes toward the electrolyte membrane / electrode structure side facing the resin impregnated portion at the inner circumferential base end side. Preferably it is formed.

  According to the present invention, the electrolyte membrane / electrode structure and the resin frame member are fixed to each other by the adhesive application portion to which the adhesive is applied and the resin impregnation portion to which the resin material is impregnated. For this reason, the electrolyte membrane / electrode structure and the resin frame member are firmly and surely fixed and can be prevented from separating from each other as much as possible.

  In addition, a heat insulating space is formed between the adhesive application portion and the resin impregnated portion. Therefore, the adhesive is not affected by heat at the time of resin impregnation, and for example, it is possible to reliably prevent thermal decomposition of the adhesive.

  Thus, with a simple configuration, the resin frame member can be firmly joined by circling the outer periphery of the solid polymer electrolyte membrane constituting the step MEA, and deterioration of the adhesive or the like can be suppressed as much as possible.

It is a principal part disassembled perspective explanatory view of the polymer electrolyte fuel cell in which the electrolyte membrane / electrode structure with a resin frame according to the 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 principal part explanatory drawing of the said electrolyte membrane and electrode structure with a resin frame. It is a perspective explanatory view of the resin frame member which constitutes the resin membrane-attached electrolyte membrane electrode structure. 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. 6 is an explanatory diagram of an electrolyte membrane-electrode assembly disclosed in Patent Document 1. FIG.

  As shown in FIGS. 1 and 2, an electrolyte membrane / electrode structure 10 with a resin frame according to an embodiment of the present invention is incorporated in a horizontally long (or vertically long) rectangular polymer electrolyte fuel cell 12. The plurality of fuel cells 12 are stacked in, for example, an arrow A direction (horizontal direction) or an arrow C direction (gravity direction) to form a fuel cell stack. The fuel cell stack is mounted on, for example, a fuel cell electric vehicle (not shown) as an in-vehicle fuel cell stack.

  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 have a horizontally long (or vertically long) rectangular shape. 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 plating-treated steel plate, a metal plate whose surface is subjected to anticorrosion treatment, a carbon member, or the like.

  The electrolyte membrane / electrode structure 10 with a rectangular resin frame includes an electrolyte membrane / electrode structure 10a as shown in FIGS. 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, an anode electrode (first electrode) 20 sandwiching the solid polymer electrolyte membrane 18, and And a cathode electrode (second electrode) 22.

  The solid polymer electrolyte membrane 18 may use an HC (hydrocarbon) based electrolyte in addition to the fluorine based electrolyte. The cathode electrode 22 has a smaller planar dimension than the solid polymer electrolyte membrane 18 and the anode electrode 20.

  Instead of the above configuration, the anode electrode 20 may be configured to have a smaller planar dimension than the solid polymer electrolyte membrane 18 and the cathode electrode 22. At that time, the anode electrode 20 is a second electrode, and the cathode electrode 22 is a first electrode.

  The anode electrode 20 includes a first electrode catalyst layer (first catalyst layer) 20a joined to one surface 18a of the solid polymer electrolyte membrane 18, and a first gas diffusion layer laminated on the first electrode catalyst layer 20a. (First diffusion layer) 20b. The first electrode catalyst layer 20a and the first gas diffusion layer 20b have the same external dimensions and are set to the same external dimensions as (or less than) the solid polymer electrolyte membrane 18.

  The cathode 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 (first electrode) laminated on the second electrode catalyst layer 22a. 2 diffusion layer) 22b. The outer peripheral end 22ae of the second electrode catalyst layer 22a protrudes outward from the outer peripheral end 22be of the second gas diffusion layer 22b, and the second electrode catalyst layer 22a has an outer shape of the solid polymer electrolyte membrane 18. The outer dimension is set smaller than the dimension.

  In the first electrode catalyst layer 20a and the second electrode catalyst layer 22a, porous carbon particles having a platinum alloy supported thereon are uniformly applied to the surfaces of the first gas diffusion layer 20b and the second gas diffusion layer 22b. It is formed. The first gas diffusion layer 20b and the second gas diffusion layer 22b are made of carbon paper or the like, and the planar dimension of the second gas diffusion layer 22b is set smaller than the planar dimension of the first gas diffusion layer 20b. . The first electrode catalyst layer 20a and the second electrode catalyst layer 22a are formed on both surfaces of the solid polymer electrolyte membrane 18, for example.

  The resin membrane-attached electrolyte membrane / electrode structure 10 includes a resin frame member 24 that circulates around the outer periphery of the solid polymer electrolyte membrane 18 and is joined to the anode electrode 20 and the cathode electrode 22. The resin frame member 24 includes, for example, PPS (polyphenylene sulfide), PPA (polyphthalamide), PEN (polyethylene naphthalate), PES (polyethersulfone), LCP (liquid crystal polymer), PVDF (polyvinylidene fluoride), It is composed of silicone rubber, fluorine rubber, EPDM (ethylene propylene rubber) or the like.

  The resin frame member 24 and the first gas diffusion layer 20b of the cathode electrode 22 are integrated by a resin impregnated portion 24t. As will be described later, the resin impregnated portion 24t is configured by heating and deforming a resin protrusion 24ta formed integrally with the resin frame member 24. The resin protrusion 24ta has a rib shape and is configured in a frame shape that goes around the first gas diffusion layer 20b. Note that the resin protrusion 24ta may be provided with a notch (non-continuous portion) in at least a part of the circular shape.

  A thin-walled inner bulging portion 24 a that protrudes to the outer peripheral side of the cathode electrode 22 is integrally provided on the inner peripheral base end portion 24 b of the resin frame member 24. The inner bulging portion 24a has the same thickness as the cathode electrode 22, substantially the same thickness as the second gas diffusion layer 22b (when an intermediate layer is provided on the second gas diffusion layer 22b). (Including the thickness of the intermediate layer).

  The inner bulging portion 24a has a circumferential concave portion 26a that circulates around a contact portion with the electrolyte membrane / electrode structure 10a. An adhesive application part 25a for applying the adhesive 25 is provided in the circumferential recess 26a. As the adhesive 25, for example, a liquid seal or a hot melt agent is used.

  The circumferential concave portion 26a includes an inner circumferential convex portion 26b1 provided on the inner circumferential end side of the inner bulging portion 24a and an outer circumferential convex portion (circular convex portion) provided on the outer circumferential end side (the inner circumferential base end portion 24b side) of the inner bulging portion 24a. ) 26b2. The outer peripheral convex portion 26b2 faces (overlaps) the resin-impregnated portion 24t along the stacking direction (arrow A direction). The circumferential recess 26a is located between the adhesive application part 25a and the resin impregnated part 24t. Specifically, as shown in FIG. 3, the adhesive application part 25a and the adhesive application part 25a A space portion 28 for heat insulation is formed between the outer circumferential convex portion 26b2. That is, the space part 28 is formed between the outer peripheral end position of the adhesive application part 25a and the inner peripheral end position of the resin impregnated part 24t.

  The outer peripheral convex portion 26b2 is configured to be thicker than the inner peripheral convex portion 26b1 by the thickness of the second electrode catalyst layer 22a. The inner circumferential convex portion 26b1 contacts the second electrode catalyst layer 22a protruding outward from the second gas diffusion layer 22b of the electrolyte membrane / electrode structure 10a. The outer peripheral convex part 26b2 is in contact with the outermost peripheral part of the solid polymer electrolyte membrane 18 constituting the electrolyte membrane / electrode structure 10a.

  The inner bulging portion 24a of the resin frame member 24 and the electrolyte membrane / electrode structure 10a are bonded by an adhesive application portion 25a that is a layer of the adhesive 25 applied to the circumferential recess 26a. The adhesive application part 25a is formed in a frame shape over the entire circumference of the outer peripheral edge part 18be of the solid polymer electrolyte membrane 18. As shown in FIG. 2, a gap is formed between the inner peripheral end 24ae of the resin frame member 24 and the outer peripheral end 22be of the second gas diffusion layer 22b. An adhesive application part 25a is formed in this gap.

  As shown in FIG. 3, the resin membrane-attached electrolyte membrane / electrode structure 10 is provided with a resin impregnated portion 24 t and has a desired strength and is provided with a resin deformation temperature (for example, 500 ° C.). f1 is set. The resin frame-attached electrolyte membrane / electrode structure 10 is maintained at a temperature lower than the decomposition temperature of the adhesive 25 (for example, 250 ° C.) and guarantees the structure of the solid polymer electrolyte membrane 18 to provide a gas diffusion layer barrier property. A gas sealing guarantee region f2 to be secured is set. Specifically, the dimension of the space portion 28 is set so as to satisfy the above condition.

  A gas diffusion suppression region f3 is set in the electrolyte membrane / electrode structure 10 with a resin frame. The gas diffusion suppression region f3 is set in a range from the tip of the second electrode catalyst layer 22a to the boundary portion with the power generation region f4 so that the oxidant gas flows only in the second electrode catalyst layer 22a. Function. The gas diffusion suppression region f3 is maintained at a temperature (for example, 180 ° C.) or less at which the adhesive 25 is not decomposed and the mechanical properties of the solid polymer electrolyte membrane 18 can be maintained. The power generation region f4 is maintained at a temperature lower than the decomposition temperature (for example, 160 ° C.) of the solid polymer electrolyte membrane 18 without a decrease in power generation function.

  In addition, although the space part 28 which is a heat insulation layer is provided preferably over the perimeter of the rotation recessed part 26a, a part of the perimeter may be sufficient. The space 28 is preferably provided at a position corresponding to the resin-impregnated portion 24t.

  As shown in FIG. 1, one end edge of the fuel cell 12 in the direction of arrow B (horizontal direction in FIG. 1) communicates with each other in the direction of arrow A, which is the stacking direction. A cooling medium inlet communication hole 32a and a fuel gas outlet communication hole 34b are provided. The oxidant gas inlet communication hole 30a supplies an oxidant gas, for example, an oxygen-containing gas, while the cooling medium inlet communication hole 32a supplies a cooling medium. The fuel gas outlet communication hole 34b discharges fuel gas, for example, hydrogen-containing gas. The oxidant gas inlet communication hole 30a, the cooling medium inlet communication hole 32a, and the fuel gas outlet communication hole 34b are 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, the fuel gas inlet communication hole 34a for supplying fuel gas, the cooling medium outlet communication hole 32b for discharging the cooling medium, and the oxidation An oxidant gas outlet communication hole 30b for discharging the oxidant gas is provided. The fuel gas inlet communication hole 34a, the cooling medium outlet communication hole 32b, and the oxidant gas outlet communication hole 30b 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. A cooling medium flow path 40 communicating with the cooling medium inlet communication hole 32a and the cooling medium outlet communication hole 32b is formed between the surface 14b of the first separator 14 and the surface 16b of the second separator 16 adjacent to each other. .

  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 resin frame member 24 constituting the electrolyte membrane / electrode structure 10 with a resin frame, and a second seal of the second separator 16. And a second convex seal 42b in contact with the member 44. The second seal member 44 constitutes a flat seal in which the surface that contacts the second convex seal 42b extends in a flat shape along the separator surface. Instead of the second convex seal 42b, the second seal member 44 may be provided with a convex seal (not shown).

  For the first seal member 42 and the second seal member 44, for example, EPDM, NBR, fluororubber, silicone rubber, fluorosilicone rubber, butyl rubber, natural rubber, styrene rubber, chloroprene or acrylic rubber or the like, cushion material Alternatively, an elastic seal member such as a packing material is used.

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

  First, the electrolyte membrane / electrode structure 10a that is the step MEA is manufactured, while the resin frame member 24 is injection-molded using a mold (not shown). As shown in FIG. 4, the resin frame member 24 has a thin inner bulging portion 24a. On the surface opposite to the inner bulging portion 24a, there is a resin protrusion 24ta that protrudes in the thickness direction and circulates around the anode electrode 20, and the anode electrode 20 is impregnated with resin to form the resin-impregnated portion 24t. It is integrally molded by turning around in a frame shape.

  Next, as shown in FIG. 5, the adhesive 25 is applied to the circumferential recess 26a of the resin frame member 24 through, for example, a dispenser (not shown) to form an adhesive application portion 25a. On the other hand, the adhesive 25 is applied to the inner peripheral surface of the inner peripheral end 24ae of the resin frame member 24 to form an adhesive application portion 25a.

  Then, the inner peripheral base end 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, the adhesive 25 is heated, and a load (press or the like) ) Is given.

  Thereby, the inner bulging part 24a of the resin frame member 24 and the outer peripheral edge part 18be of the solid polymer electrolyte membrane 18 are bonded together via the adhesive application part 25a. Further, the inner peripheral surface of the inner peripheral end 24ae of the resin frame member 24 and the tip end surface of the outer peripheral end 22be of the second gas diffusion layer 22b are bonded via an adhesive application unit 25a.

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

  Accordingly, the resin protrusion 24ta is heated and melted, and the resin protrusion 24ta is impregnated in the first gas diffusion layer 20b constituting the anode electrode 20 to provide the resin impregnation part 24t. 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 second separator 16 contacts the inner bulging portion 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 first separator 14. 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. Supplied. 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 22 of the electrolyte membrane / electrode structure 10a. Supplied. On the other hand, the fuel gas is introduced into the fuel gas flow path 38 of the first separator 14 from the fuel gas inlet communication hole 34a. The fuel gas moves in the direction of arrow B along the fuel gas flow path 38 and is supplied to the anode electrode 20 of the electrolyte membrane / electrode structure 10a.

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

  Next, the oxidant gas consumed by being supplied to the cathode electrode 22 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 20 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 the present embodiment, as shown in FIG. 2, the resin frame member 24 and the cathode electrode 22 side of the solid polymer electrolyte membrane 18 are joined by an adhesive 25. On the other hand, the resin frame member 24 and the anode electrode 20 side are joined by the resin protrusion 24ta being impregnated with resin. For this reason, the cathode electrode 22, the anode electrode 20, and the resin frame member 24 are firmly and securely fixed, and can be prevented from separating from each other as much as possible.

  Moreover, as shown in FIGS. 2 and 3, a space portion 28 for heat insulation is formed between the adhesive application portion 25a and the resin impregnation portion 24t. Therefore, the adhesive 25 is not affected by heat at the time of resin impregnation, and for example, the thermal decomposition of the adhesive 25 can be reliably prevented.

  Thus, with a simple configuration, the resin frame member 24 is firmly joined by circling around the outer periphery of the solid polymer electrolyte membrane 18 constituting the electrolyte membrane / electrode structure 10a, and deterioration of the adhesive 25 is made possible. The effect that it can suppress automatically is acquired.

  In the present embodiment, the resin-impregnated portion 24t is constituted by the resin protrusion 24ta that is integrally formed with the resin frame member 24. However, the present invention is not limited to this. 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 to form the resin impregnated portion 24t. Also good.

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 ... Anode electrode 20a, 22a ... Electrode catalyst layer 20b, 22b ... Gas diffusion layer 22 ... Cathode electrode 24 ... Resin frame member 24a ... Inner bulging part 24b ... Inner peripheral base end 24t ... Resin impregnated part 24ta ... Resin protrusion 25 ... Adhesive 25a ... Adhesive application part 26a ... Circumferential recess 26b1 ... Inside Peripheral convex part 26b2 ... Peripheral convex part 28 ... Space part 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 path 40 ... Cooling medium flow path 42, 44 ... Sealing member

Claims (1)

A first electrode having a first catalyst layer and a first diffusion layer is provided on one surface of the solid polymer electrolyte membrane, and a second catalyst layer and a second electrode are provided on the other surface of the solid polymer electrolyte membrane. A stepped electrolyte membrane / electrode structure in which a second electrode having a diffusion layer is provided, and a planar dimension of the first electrode is set to be larger than a planar dimension of the second electrode;
A resin frame member provided around the outer periphery of the solid polymer electrolyte membrane;
An electrolyte membrane / electrode structure with a resin frame for a fuel cell comprising:
The resin frame member has a thin-walled inner bulging portion that bulges from the inner peripheral base end portion toward the second electrode, and the inner bulging portion has a contact portion with the electrolyte membrane / electrode structure. Is provided with an adhesive application section where the adhesive is applied around
The inner peripheral base end portion of the resin frame member is provided with a resin impregnated portion in which the first electrode and the resin frame member are integrated by impregnating the outer peripheral end portion of the first electrode with a resin material. ,
Between the adhesive application part and the resin impregnated part, a heat insulating space is formed ,
The inner bulge portion forms a circumferential recess that circulates around the contact portion with the electrolyte membrane / electrode structure,
In the circumferential recess, the adhesive application portion and the heat insulation space are configured, and an end on the inner peripheral base end side is opposed to the resin-impregnated portion on the electrolyte membrane / electrode structure side. fuel cell resin frame equipped membrane electrode assembly, wherein Rukoto circumferential projection part is formed to protrude.

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