JP2003007328A - Component for fuel cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a component 1 for a fuel cell, which can improve assembly of the fuel cell, does not interfere with power generation of the fuel cell and can exhibit a stable sealability. SOLUTION: The component includes a gas-diffusion layer 2, a sheet frame member 3 arranged in an extended direction of an end face of the gas-diffusion layer 2, and a gasket 4 of a elastic rubber material which is disposed between the gas-diffusion layer 2 and the frame member 3 and is formed, in one body with the layer 2 and the member 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component for a fuel cell which is a constituent element of a fuel cell, and more particularly to an integrated product of a gas diffusion layer, a gasket and a frame member.

[0002]

A single cell of a fuel cell has a membrane electrode assembly (MEA) carrying a reaction electrode portion (catalyst layer) on both sides of an electrolyte membrane (ion exchange membrane) and a gas diffusion layer (GDL). Further, both sides thereof are sandwiched by separators, and a reaction gas and the like are sealed by interposing a gasket between the membrane electrode assembly and the separator.

Therefore, since a fuel cell stack is constructed by stacking a plurality of unit cells composed of these many constituent elements, there is a disadvantage that a large number of man-hours are required for stack assembly.

Further, when the gasket is made of rubber alone, it is necessary to seal the reaction surface of the separator and the wide board surface. Therefore, the rubber alone has no strength and is easy to handle. Is not very good, and workability and positioning at the time of stacking are not so good. For this reason, in recent years, it has been demanded to improve the assembling property by integrating the constituent elements, and for example, investigations such as integrally forming a gasket on a separator (Patent Publication 2000-133288) are being conducted.

However, when the gasket is integrally molded with the separator, depending on the material of the separator, the separator may be cracked due to the mold clamping force or the molding pressure at the time of molding. Can be difficult.

Although it is conceivable to integrate a gasket into the membrane electrode composite side in addition to the separator, the heat during molding of the gasket may affect the membrane electrode composite body and may hinder power generation performance. is there.

Further, in the membrane electrode assembly, there is also a type in which the catalyst supporting part and the gas diffusion layer are divided, and in this case,
Since the gas diffusion layer is made of thin carbon paper or carbon cloth, it has no strength and may be damaged during handling, resulting in deterioration of the assembling property.

[0008]

In view of the above points, the present invention can improve the assemblability of the fuel cell, do not hinder the power generation performance of the fuel cell, and provide a more stable sealing performance. An object of the present invention is to provide a component for a fuel cell that can exert its effect.

[0009]

In order to achieve the above object, a fuel cell component according to claim 1 of the present invention comprises a gas diffusion layer and a sheet-like frame arranged in an extension direction of an end face of the gas diffusion layer. It is characterized in that it has a member and a gasket made of a rubber-like elastic material which is arranged between the gas diffusion layer and the frame member and integrated with both of them.

A fuel cell component according to a second aspect of the present invention comprises a gas diffusion layer, and a sheet-like frame member disposed in the direction of extension of the end surface of the gas diffusion layer and having a sticking function on one surface. And a gasket made of a rubber-like elastic material that is disposed between the gas diffusion layer and the frame member and integrated with both of them.

A fuel cell component according to a third aspect of the present invention is characterized in that the fuel cell component according to the first aspect is integrated with a separator by a joining means such as an adhesive. Is.

According to a fourth aspect of the present invention, there is provided a fuel cell component, wherein the fuel cell component according to the first aspect is integrated with a membrane electrode assembly by a bonding means such as an adhesive or thermocompression bonding. It is characterized by that.

A fuel cell component according to a fifth aspect of the present invention is characterized in that the fuel cell component according to the second aspect is integrated with a separator by a bonding function of a frame member. Is.

A fuel cell component according to a sixth aspect of the present invention is characterized in that the fuel cell component according to the second aspect is integrated with the membrane electrode assembly by the attachment function of the frame member. It is what

A fuel cell component according to a seventh aspect of the present invention is the fuel cell component according to the first or second aspect, wherein the gas diffusion layer and the frame member are formed by press molding, injection molding or a dispenser. It is characterized by being integrated through a gasket.

Furthermore, a fuel cell component according to claim 8 of the present invention is the fuel cell component according to claim 1 or 2, wherein a part of the molding material for molding the gasket made of a rubber-like elastic material is used. It is characterized in that the gasket is integrated with the gas diffusion layer by impregnating the end surface portion of the gas diffusion layer.

According to the component for a fuel cell according to claim 1 of the present invention having the above-mentioned constitution, since the gas diffusion layer, the sheet-like frame member and the gasket are integrally formed, these components are integrated. In the case of a single rubber product, it can be handled as a part as a whole, and a sheet-shaped frame member is placed outside the peripheral edge of the gas diffusion layer to support the gaskets placed between the two from both sides. It becomes possible to solve the inadequate handling of the gasket that occurs in the above. In addition, since a sheet-shaped frame member suitable for use as a mounting member is provided in the extension direction of the end surface of the gas diffusion layer, an adhesive is applied to one surface of this frame member to form the frame member as a separator or a membrane electrode. The components can be attached to the separator or the membrane electrode assembly simply by pressing it against the composite. In addition, since the gas diffusion layer, the gasket and the frame member are arranged in the plane direction so that the gasket can form a double-sided gasket, the gasket is not affected by the gas diffusion layer and the frame member, and the separator and the membrane electrode assembly are not affected. Effectively seal between and. Further, since the gasket is not integrally molded on the membrane electrode assembly side, the power generation performance is not hindered.

The fuel cell component according to claim 1 is integrated with the separator in advance by a bonding means such as adhesion with an adhesive (claim 3), or a bonding means such as adhesion or thermocompression bonding with an adhesive. By this, by preliminarily integrating with the membrane electrode assembly (Claim 4), it becomes possible to further improve the handling property or assembling property thereof. The gasket is molded by press molding, injection molding or a dispenser method to be integrated with the gas diffusion layer and the frame member (claim 7), or a part of the molding material for molding the gasket is an end surface of the gas diffusion layer. By impregnating the portion and integrating it with the gas diffusion layer (claim 8), it is firmly bonded to the gas diffusion layer or the frame member.

A second aspect of the present invention having the above structure.
According to the fuel cell component according to the above, since the gas diffusion layer, the sheet-shaped frame member, and the gasket are integrally formed, these components can be handled as a single component, and the gas diffusion is also possible. Since the sheet-shaped frame member is arranged outside the peripheral portion of the layer and the gasket arranged between the two is supported from both sides, it is possible to eliminate the deficiency of the handleability of the gasket which occurs in the case of a single rubber product. It will be possible. Further, since a sheet-shaped frame member suitable for use as a mounting member is provided in the extension direction of the end surface of the gas diffusion layer, and a sticking function is set in advance on one surface thereof, this frame member is used as a separator or a membrane electrode. The components can be attached to the separator or the membrane electrode assembly simply by pressing it against the composite.
In addition, since the gas diffusion layer, the gasket and the frame member are arranged in the plane direction so that the gasket can form a double-sided gasket, the gasket is not affected by the gas diffusion layer and the frame member, and the separator and the membrane electrode assembly are not affected. Effectively seal between and. Further, since the gasket is not integrally molded on the membrane electrode assembly side, the power generation performance is not hindered.

The fuel cell component according to claim 2 is integrated with a separator (claim 5) or a membrane electrode assembly (claim 6) in advance by a bonding function set on one surface of the sheet-shaped frame member. By doing so, it becomes possible to further improve the handling property and the assembling property. The gasket is molded by press molding, injection molding or a dispenser method to be integrated with the gas diffusion layer and the frame member (claim 7), or a part of the molding material for molding the gasket is an end surface of the gas diffusion layer. By impregnating the portion and integrating it with the gas diffusion layer (claim 8), it is firmly bonded to the gas diffusion layer or the frame member.

The following technical matters are included in the present application.

That is, in order to achieve the above object, one fuel cell component proposed by the present application has the following contents.

(1) A gasket for a fuel cell in which a resin film is arranged in a frame shape in the extension direction of an end surface of a gas diffusion layer (GDL) having an area equivalent to that of a reaction electrode portion, and both are integrated via a rubber.

(2) A fuel cell gasket in which a resin film with an adhesive is arranged in a frame shape in the extension direction of the end surface of a gas diffusion layer (GDL) having an area equal to that of the reaction electrode portion, and both are integrated via rubber. .

(3) A separator-integrated gasket in which the gasket of the above (1) is integrated with a fuel cell separator by an adhesive or the like.

(4) A membrane / electrode composite integrated gasket in which the gasket of the above (1) is integrated with a membrane / electrode composite for a fuel cell by an adhesive, thermocompression bonding or the like.

(5) A separator-integrated gasket in which the gasket of the above (2) is integrated with a fuel cell separator via an adhesive.

(6) A membrane / electrode composite integrated gasket in which the gasket of the above (2) is integrated with a membrane / electrode composite for a fuel cell via an adhesive.

(7) For a fuel cell, wherein the gasket of (1) or (2) above is obtained by integrating a resin film and a gas diffusion layer (GDL) via rubber by press molding, injection molding, dispenser or the like. gasket.

(8) In the embodiment, first, a resin film or a resin film with a pressure-sensitive adhesive is arranged in a frame shape in the extending direction of the end surface of the gas diffusion layer having the same size as the reaction electrode portion, and both are interposed via rubber. By integrating them, the handlinkability of the gasket is improved, and the number of parts is reduced to reduce the number of assembly steps.

(9) The gasket material is not particularly limited as long as it can be used for a fuel cell gasket.
Any material can be used as long as it is excellent in compression set and does not pollute the system. For example, ethylene propylene diene (EPDM),
Rubber materials such as butyl, silicone or fluorine are preferred. Liquid rubber is preferable in consideration of impregnation into the gas diffusion layer, and adhesive rubber material is preferable in consideration of integration with the resin film.

(10) As for the structure of the lip portion of the gasket, the resin film and the gas diffusion layer are located at both ends of the rubber, and the lip portion having the sealing property is only rubber, so that the compression set, hardness, and reaction force are set. This is more advantageous than simply forming the seal on the gas diffusion layer or the resin film.

(11) The gasket is a resin film
In the case of a gas diffusion layer integrated gasket, it is possible to integrate it with a separator or a membrane electrode composite using an adhesive, etc.In the case of a resin film with an adhesive / gas diffusion layer integrated type, directly
It can be integrated with a separator or membrane electrode assembly.

(12) Polyethylene terephthalate (PET), polyether nitrile (PEN) or polyimide (PI) can be used for the resin film, and the film thickness is 10 to 500 μm, preferably 50.
˜150 μm is used.

(13) Carbon paper or carbon cloth (carbonized non-woven fabric) is used for the gas diffusion layer.
Etc., and the thickness is 50 to 500 μm.

(14) Further, as the pressure-sensitive adhesive, a silicone-based adhesive is suitable, and the coating thickness is 100 μm or less, preferably 10 to 50 μm.

(15) According to the above construction, the number of man-hours for assembling the fuel cell can be reduced, the assemblability is improved, and the gas diffusion layer can be used only in the reaction electrode section, which is advantageous in terms of cost. Due to the seal structure that is not affected by the integrally formed gas diffusion layer and the resin film, it is possible to obtain operational effects such as stable sealability.

[0038]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

First Embodiment FIG. 1 is a plan view of a fuel cell component 1 according to the first embodiment of the present invention, and an enlarged cross section taken along line AA is shown in FIG. There is. The component 1 according to the embodiment is an integrated product of the gas diffusion layer 2, the frame member 3, and the gasket 4, and is configured as follows.

That is, first, a flat plate-shaped gas diffusion layer (GDL) 2 having a predetermined plane shape (generally rectangular in FIG. 1) is provided, and is located outside the peripheral edge portion 2a of the gas diffusion layer 2. The frame member 3 is arranged to surround the gas diffusion layer 2 in the end face extension direction, and the gas diffusion layer 2
The gasket 4 is arranged between the frame member 3 and the frame member 3, and the gasket 4 is integrated with the gas diffusion layer 2 and the frame member 3. In FIG. 1, reference numeral 5 indicates a space for a flow passage that penetrates the component 1 in the thickness direction thereof, and the frame member 3 is formed to form this space 5.
A notch 3a is provided on the inner peripheral edge of the gasket 3, and the gasket 4 is integrated only with the frame member 3 in the notch 3a.

The gas diffusion layer 2 is made of a porous material such as carbon paper or carbon cloth,
As shown in FIG. 2, a relatively thin flange-shaped gasket mounting portion 2b is provided on the peripheral portion 2a.

The frame member 3 is formed of a resin film such as a PET film in the form of a sheet, and is formed in a predetermined plane shape so as to surround the gas diffusion layer 2 over the entire circumference thereof. As described above, the cutout portion 3a is provided in the inner peripheral edge portion of the frame member 3 to form the space 5, but in the plane of the frame member 3 to form another flow path space 6. Has a penetrating portion 3b, and a second gasket 7 having the same structure as the gasket 4 is integrated over the entire circumference of the peripheral portion of the penetrating portion 3b.

The gasket 4 is formed of a cured product of liquid rubber. When the gasket 1 is molded, a part of the molding material impregnates the gasket mounting portion 2b of the gas diffusion layer 2 with respect to the gas diffusion layer 2. Are integrated. In the figure, for convenience of explanation (drawing), the impregnated portion 4a is shown with dots. Moreover, the gasket 4 is integrated with the inner peripheral edge of the frame member 3 by performing so-called insert molding, whereby the gas diffusion layer 2 is formed.
The frame member 3 and the frame member 3 are integrated via the gasket 4, and the gas diffusion layer 2, the gasket 4 and the frame member 3 are integrated.
The integrated structure of is realized. The gas diffusion layer 2, the gasket 4, and the frame member 3 are arranged in a plane direction and arranged in the same plane. Sealing portions 4b and 4c are provided on both surfaces of the gasket 4, respectively.

The component 1 having the above-mentioned configuration is shown in FIG.
As shown in FIG. 3, the adhesive 8 is applied to one surface of the frame member 3, and the adhesive 8 adheres to the separator 9 or the membrane electrode assembly (MEA) 10 to integrate them. .

The separator 9 shown in FIG. 3 is provided with a groove-shaped recess 9a for fitting the gasket 4 therein.
The component 1 and the separator 9 are positioned in the plane direction by fitting the both 4 and 9a together during mounting. The membrane electrode assembly 10 shown in FIG. 4 has an electrolyte membrane (ion exchange membrane) 1
1 has a reaction electrode portion (catalyst layer) 12 supported on both sides thereof, and the reaction electrode portion 12 and the gas diffusion layer 2 are formed to have substantially the same size, so that the peripheral edge portion 11a of the electrolyte membrane 11 is formed. Gasket 4 and frame member 3 above and below
Are overlaid.

In the component 1 having the above structure, first, since the gas diffusion layer 2, the frame member 3 and the gasket 4 are integrally formed as described above, these components are combined as one component. Therefore, it is possible to reduce the man-hours for assembling the fuel cells or the stack and to facilitate the assembling work. Further, the adhesive 8 is applied to one surface of the frame member 3 so that the frame member 3
Since the component 1 can be attached to the separator 9 or the membrane electrode assembly 10 only by pressing the component 9 onto the separator 9 or the membrane electrode assembly 10, the attachment work can be facilitated. Further, since the gas diffusion layer 2, the gasket 4, and the frame member 3 are arranged in the plane direction and the gasket 4 constitutes a double-sided gasket, one gasket 4 effectively seals between the separator 9 and the membrane electrode assembly 10. can do. The gasket 4 exhibits a good sealing action without being affected by the gas diffusion layer 2 and the frame member 3 arranged in the plane direction.

Second Embodiment ... FIG. 5 is a plan view of a fuel cell component 1 according to a second embodiment of the present invention, and an enlarged cross section taken along line BB thereof is shown in FIG. There is. The component 1 according to the embodiment is an integrated product of the gas diffusion layer 2, the frame member 3, and the gasket 4, and is configured as follows.

That is, first, a flat plate-shaped gas diffusion layer (GDL) 2 having a predetermined plane shape (generally rectangular in FIG. 5) is provided, and is located outside the peripheral edge portion 2a of the gas diffusion layer 2. The frame member 3 is arranged to surround the gas diffusion layer 2 in the end face extension direction, and the gas diffusion layer 2
The gasket 4 is arranged between the frame member 3 and the frame member 3, and the gasket 4 is integrated with the gas diffusion layer 2 and the frame member 3. In FIG. 5, reference numeral 5 indicates a space for a flow path that penetrates the component 1 in the thickness direction, and the frame member 3 is formed to form this space 5.
A notch 3a is provided on the inner peripheral edge of the gasket 3, and the gasket 4 is integrated only with the frame member 3 in the notch 3a.

The gas diffusion layer 2 is made of a porous material such as carbon paper or carbon cloth,
As shown in FIG. 6, a relatively thin flange-shaped gasket mounting portion 2b is provided on the peripheral portion 2a.

The frame member 3 is formed of a resin film such as a PET film in the form of a sheet, and is formed in a predetermined plane shape so as to surround the gas diffusion layer 2 over the entire circumference thereof. As described above, the cutout portion 3a is provided in the inner peripheral edge portion of the frame member 3 to form the space 5, but in the plane of the frame member 3 to form another flow path space 6. Has a penetrating portion 3b, and a second gasket 7 having the same structure as the gasket 4 is integrated over the entire circumference of the peripheral portion of the penetrating portion 3b.

The adhesive 13 is applied to one surface of the frame member 3 in advance. In FIG. 6, this patch 1
3 is applied to the lower surface 3c of the frame member 3, but may be applied to the upper surface 3d (see FIG. 7). In addition, when it is necessary to protect the adhesive 13 in order to maintain the adhesive function of the adhesive 13 before the attaching work, a release film (not shown) is provided on one surface of the frame member 3 until the attaching work. It is preferable to attach it.

The gasket 4 is made of a cured product of liquid rubber, and when the gasket 1 is molded, a part of the molding material impregnates the gasket mounting portion 2b of the gas diffusion layer 2 with respect to the gas diffusion layer 2. Are integrated. In the figure, for convenience of explanation (drawing), the impregnated portion 4a is shown with dots. Moreover, the gasket 4 is integrated with the inner peripheral edge of the frame member 3 by performing so-called insert molding, whereby the gas diffusion layer 2 is formed.
The frame member 3 and the frame member 3 are integrated via the gasket 4, and the gas diffusion layer 2, the gasket 4 and the frame member 3 are integrated.
The integrated structure of is realized. The gas diffusion layer 2, the gasket 4, and the frame member 3 are arranged in a plane direction and arranged in the same plane. Sealing portions 4b and 4c are provided on both surfaces of the gasket 4, respectively.

The component 1 having the above-mentioned configuration is shown in FIG.
As shown in FIG. 5, the adhesive agent 13 applied beforehand to one surface of the frame member 3 is attached to the separator 9 (FIG. 7) or the membrane electrode assembly (MEA) 10 (FIG. 8) by the attaching function, and integrated with them. Be converted.

The separator 9 of FIG. 7 is provided with a groove-shaped recess 9a for fitting the gasket 4 therein.
The component 1 and the separator 9 are positioned in the plane direction by fitting the both 4 and 9a together during mounting. The membrane electrode assembly 10 shown in FIG. 8 has an electrolyte membrane (ion exchange membrane) 1
1 has a reaction electrode portion (catalyst layer) 12 supported on both sides thereof, and the reaction electrode portion 12 and the gas diffusion layer 2 are formed to have substantially the same size, so that the peripheral edge portion 11a of the electrolyte membrane 11 is formed. Gasket 4 and frame member 3 above and below
Are overlaid.

In the component 1 having the above structure,
As described above, since the gas diffusion layer 2, the frame member 3, and the gasket 4 are integrally formed, these constituent elements can be handled as one component, and therefore, the number of assembly steps of the fuel cell or the stack can be increased. Can be reduced and the assembling work can be facilitated. Further, the adhesive function of the adhesive 13 is set on one surface of the frame member 3, and the frame member 3 is attached to the separator 9 or the membrane electrode assembly 10.
Since the component 1 can be attached to the separator 9 or the membrane electrode assembly 10 simply by pressing it to, the attachment work can be facilitated. Further, since the gas diffusion layer 2, the gasket 4 and the frame member 3 are arranged in the plane direction and the gasket 4 constitutes a double-sided gasket, one gasket 4 effectively seals between the separator 9 and the membrane electrode assembly 10. be able to. The gasket 4 exhibits a good sealing action without being affected by the gas diffusion layer 2 and the frame member 3 arranged in the plane direction.

[0056]

The present invention has the following effects.

That is, first, in the fuel cell component according to claim 1 of the present invention having the above-mentioned structure, since the gas diffusion layer, the sheet-like frame member and the gasket are integrally formed, these structures are formed. It becomes possible to handle the elements as a single component, and therefore, the number of assembling steps of the fuel cell or stack can be reduced and the assembling work can be facilitated. In addition, since the sheet-shaped frame member is arranged outside the peripheral portion of the gas diffusion layer and the gasket arranged between the two is supported from both sides, incomplete handling of the gasket that occurs in the case of a single rubber unit is avoided. It can be resolved. In addition, since a sheet-shaped frame member suitable for use as a mounting member is provided in the extension direction of the end surface of the gas diffusion layer, an adhesive is applied to one surface of this frame member to form the frame member as a separator or a membrane electrode. The components can be attached to the separator or the membrane electrode assembly simply by pressing them against the composite, and thus the attachment work can be facilitated. Further, since the gas diffusion layer, the gasket, and the frame member are arranged in the plane direction so that the gasket can form a double-sided gasket, the gasket and the frame electrode are not affected by the gasket and the separator and the membrane electrode. Effectively seals to and from the composite. Further, since the gasket is not integrally molded on the membrane electrode assembly side, the power generation performance is not hindered.

A second aspect of the present invention having the above structure.
In the component part for a fuel cell according to the above, since the gas diffusion layer, the sheet-shaped frame member and the gasket are integrally formed, it becomes possible to handle these components as a single component, and thus the fuel cell Alternatively, the number of steps for assembling the stack can be reduced and the assembling work can be facilitated. In addition, since the sheet-shaped frame member is arranged outside the peripheral portion of the gas diffusion layer and the gasket arranged between the two is supported from both sides, incomplete handling of the gasket that occurs in the case of a single rubber unit is avoided. It can be resolved. Further, since a sheet-shaped frame member suitable for use as a mounting member is provided in the extension direction of the end surface of the gas diffusion layer, and a sticking function is set in advance on one surface thereof, this frame member is used as a separator or a membrane electrode. The components can be attached to the separator or the membrane electrode assembly simply by pressing them against the composite, and thus the attachment work can be facilitated. Moreover, since the gas diffusion layer, the gasket and the frame member are arranged in the plane direction so that the gasket can form a double-sided gasket, the gasket and the frame electrode are not affected by the gasket and the separator and the membrane electrode. Effectively seals to and from the composite. Further, since the gasket is not integrally molded on the membrane electrode assembly side, the power generation performance is not hindered.

In addition to this, in the fuel cell component according to claim 3 or 4 of the present invention having the above structure, the component according to claim 1 is previously integrated with the separator by a joining means such as an adhesive. Since it is made into a polymer or integrated with the membrane electrode assembly in advance by a bonding means such as an adhesive or thermocompression bonding, it is possible to further improve the handleability and the assemblability.

A fifth aspect of the present invention having the above structure.
Alternatively, in the fuel cell component according to the sixth aspect, the component according to the second aspect is integrated with the separator or the membrane electrode assembly in advance by the attachment function set on one surface of the sheet-shaped frame member, and thus the handling property thereof is improved. Or, the assemblability can be further improved.

A seventh aspect of the present invention having the above structure.
Alternatively, in the fuel cell component according to claim 8, the gasket in the component according to claim 1 or 2 is:
The gas diffusion layer is formed by press molding, injection molding or a dispenser method and is integrated with the gas diffusion layer and the frame member, or a part of the molding material for molding the gasket is impregnated into the end surface portion of the gas diffusion layer. Being integrated with the component, the component can be firmly bonded to the gas diffusion layer or the frame member.

[Brief description of drawings]

FIG. 1 is a plan view of a fuel cell component according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a cross-sectional view of an essential part with the same components attached to a separator.

FIG. 4 is a cross-sectional view of a main part of the same component attached to a membrane electrode assembly.

FIG. 5 is a plan view of a fuel cell component according to a first embodiment of the present invention.

6 is a sectional view taken along line BB in FIG.

FIG. 7 is a cross-sectional view of an essential part with the same components attached to a separator.

FIG. 8 is a cross-sectional view of a main part with the same components attached to a membrane electrode assembly.

[Explanation of symbols]

1 Fuel cell components 2 gas diffusion layer 2a, 11a peripheral part 2b Gasket mounting part 3 frame members 3a Notch 3b penetration 3c lower surface 3d upper surface 4 gasket 4a Impregnation part 4b, 4c Seal part 5, 6 space 7 Second gasket 8 adhesive 9 separator 9a recess 10 Membrane electrode complex 11 Electrolyte membrane 12 Reaction electrode part 13 Adhesive

Claims (8)

[Claims] 1. A gas diffusion layer (2), a sheet-like frame member (3) arranged in an end face extension direction of the gas diffusion layer (2), the gas diffusion layer (2) and a frame member (3). A gasket (4) made of a rubber-like elastic material, which is arranged between and is integrated with both (2) and (3)
A component for a fuel cell, comprising: 2. A gas diffusion layer (2), a sheet-shaped frame member (3) arranged in an extension direction of an end surface of the gas diffusion layer (2) and having a sticking function on one surface, and the gas diffusion layer. (2) and a frame member (3), and a gasket (4) made of a rubber-like elastic material and integrated with both (2) and (3), Components. 3. A fuel cell component characterized in that the fuel cell component (1) according to claim 1 is integrated with a separator (9) by a joining means such as an adhesive (8). 4. The fuel cell component (1) according to claim 1 is integrated with the membrane electrode assembly (10) by a bonding means such as an adhesive (8) or thermocompression bonding. Fuel cell components. 5. A fuel cell component characterized in that the fuel cell component (1) according to claim 2 is integrated with a separator (9) by a bonding function of a frame member (3). 6. A fuel cell, characterized in that the fuel cell component (1) according to claim 2 is integrated with a membrane electrode assembly (10) by a bonding function of a frame member (3). Component part. 7. The fuel cell component (1) according to claim 1 or 2, wherein the gas diffusion layer (2) and the frame member (3) are interposed by a gasket (4) by press molding, injection molding or a dispenser. Fuel cell components characterized by being integrated as a single unit. 8. The fuel cell component (1) according to claim 1 or 2, wherein a part of the molding material for molding the gasket (4) made of a rubber-like elastic material is formed on the end face portion of the gas diffusion layer (2). A component for a fuel cell, wherein the gasket (4) is integrated with the gas diffusion layer (2) by impregnation.