JP4466874B2 - Fuel cell components - Google Patents

Description

  The present invention relates to a component for a fuel cell that forms an assembly of fuel cell components.

  As shown in FIGS. 4 and 5, conventionally, the peripheral portion of the electrolyte membrane (ion exchange membrane) 62 in the reaction electrode portion (MEA) 61 in which the gas diffusion layer (GDL) 64 is fixed on both sides is extended in the plane direction. And the seal | sticker part of a fuel cell is comprised by arrange | positioning seals 65, such as packing, on both surfaces of this peripheral part.

  The reaction electrode unit 61 is obtained by integrating an electrolyte membrane 62 and a catalyst-equipped electrode (catalyst layer) 63 disposed on both surfaces thereof, and the reaction electrode unit 61 and a gas diffusion layer fixed on both surfaces thereof. A UEA 66 is configured by 64, and this UEA 66 is sandwiched between a pair of separators (collector electrodes) 67 to configure a fuel cell.

  Among the above components, the gas diffusion layer 64 is a porous body made of carbon fiber, metal fiber, or the like, and is compressed and attached between the pair of separators 67 in the assembled state, so that sag is likely to occur. Is.

  However, in this prior art, since the gas diffusion layer 64 is fixed to the reaction electrode portion 61 as described above, when the replacement is performed, the UEA 66 must be completely replaced. Since the electrolyte membrane 62, which is a relatively expensive component, is included, the cost is greatly increased.

  In view of the above, an object of the present invention is to provide a fuel cell component capable of improving the replacement and maintenance of fuel cell components and suppressing the cost of components.

In order to achieve the above object, a fuel cell component according to claim 1 of the present invention has a pair of gas diffusion layers stacked non-adheringly on both sides of a reaction electrode portion provided with electrodes with a catalyst on both surfaces of an electrolyte membrane. A fuel cell component in which a pair of separators are disposed outside the gas diffusion layer and gaskets are provided on both surfaces of the gas diffusion layer, respectively, on the separator side of one gas diffusion layer The gasket provided on the electrolyte membrane side of one gas diffusion layer is in close contact with the electrolyte membrane, and the gasket provided on the electrolyte membrane side of the other gas diffusion layer is The gasket provided on the separator side of the other gas diffusion layer in close contact with the electrolyte membrane is in close contact with the separator, and the gasket provided on the separator side of the one gas diffusion layer. And a gasket provided on the electrolyte membrane side of the one of the gas diffusion layer is integrally formed over the required number of through holes provided in the gas diffusion layer provided on the electrolyte membrane side of the other gas diffusion layer The gasket provided on the separator side of the other gas diffusion layer is integrally formed through a required number of through holes provided in the gas diffusion layer.

  According to a second aspect of the present invention, there is provided a fuel cell component having a pair of gas diffusion layers that are non-adheringly stacked on both sides of a reaction electrode portion provided with electrodes with a catalyst on both surfaces of an electrolyte membrane, A fuel cell component in which a pair of separators are disposed outside the layer and gaskets are provided on both surfaces of the gas diffusion layer, respectively, and the gasket provided on the separator side of one gas diffusion layer Is a double lip structure having an inner lip and an outer lip in close contact with the separator, and a gasket provided on the electrolyte membrane side of one gas diffusion layer has a flat seal structure having a flat seal in close contact with the electrolyte membrane. The gasket provided on the electrolyte membrane side of the other gas diffusion layer is sealed to the inner lip and the flat seal which are in close contact with the electrolyte membrane. The gasket provided on the separator side of the other gas diffusion layer has a double lip structure having an inner lip and an outer lip in close contact with the separator, and the one gas diffusion layer The gasket provided on the separator side and the gasket provided on the electrolyte membrane side of the one gas diffusion layer are integrally formed through the porous structure of the gas diffusion layer, and the electrolyte membrane of the other gas diffusion layer The gasket provided on the side and the gasket provided on the separator side of the other gas diffusion layer are integrally formed through the porous structure of the gas diffusion layer.

  According to a third aspect of the present invention, there is provided a fuel cell component having a pair of gas diffusion layers that are non-adheringly stacked on both sides of a reaction electrode portion provided with electrodes with a catalyst on both surfaces of an electrolyte membrane, A fuel cell component in which a pair of separators are disposed outside the layer and gaskets are provided on both surfaces of the gas diffusion layer, respectively, and the gasket provided on the separator side of one gas diffusion layer Is in close contact with the separator, the gasket provided on the electrolyte membrane side of one gas diffusion layer is in close contact with the electrolyte membrane, and the gasket provided on the electrolyte membrane side of the other gas diffusion layer is in close contact with the electrolyte membrane. The gasket provided on the separator side of the other gas diffusion layer is in close contact with the separator, and the gasket provided on the separator side of the one gas diffusion layer and the one A gasket provided on the electrolyte membrane side of the gas diffusion layer is integrally formed through a required number of through holes provided in the gas diffusion layer, and the gasket provided on the electrolyte membrane side of the other gas diffusion layer and the gasket The gasket provided on the separator side of the other gas diffusion layer is integrally formed through a required number of through holes provided in the gas diffusion layer, and the gasket provided on the separator side of the one gas diffusion layer and The gasket provided on the electrolyte membrane side of one gas diffusion layer is integrally formed with a covering portion covering the end surface of the gas diffusion layer, and the gasket provided on the electrolyte membrane side of the other gas diffusion layer and The gasket provided on the separator side of the other gas diffusion layer is characterized in that a covering portion that covers the end face of the gas diffusion layer is integrally formed.

  The present invention has the following effects.

  That is, in the fuel cell component according to claims 1 to 3 of the present invention having the above-described configuration, a pair of gas diffusion layers are not bonded to both sides of the reaction electrode portion provided with the electrode with catalyst on both surfaces of the electrolyte membrane. In other words, the reaction electrode portion having the electrolyte membrane and the pair of gas diffusion layers are separated from each other. Only the gas diffusion layer needs to be replaced. Therefore, since it is not necessary to replace the relatively expensive electrolyte membrane one by one, the maintainability can be improved and the component cost can be reduced.

  In addition, the reaction electrode portion having the electrolyte membrane and the gas diffusion layer are separate parts as described above. However, since the gasket in close contact with the electrolyte membrane is integrally formed with the gas diffusion layer, the electrolyte membrane and the gas The sealing performance between the diffusion layers is not impaired. In addition, since the gasket in close contact with the separator is integrally formed with the gas diffusion layer, the sealing property between the gas diffusion layer and the separator is also ensured. Therefore, it is possible to exhibit excellent sealing properties between the electrolyte membrane and the gas diffusion layer and between the gas diffusion layer and the separator.

  In addition to this, in the fuel cell component according to claim 2 of the present invention, the gasket provided on the separator side of one gas diffusion layer has a double lip structure having an inner lip and an outer lip in close contact with the separator. And the gasket provided on the electrolyte membrane side of one gas diffusion layer has a flat seal structure having a flat seal in close contact with the electrolyte membrane, and the gasket provided on the electrolyte membrane side of the other gas diffusion layer, A double lip structure having an inner lip in close contact with the electrolyte membrane and an outer lip in close contact with the flat seal, and a gasket provided on the separator side of the other gas diffusion layer has an inner lip and an outer lip in close contact with the separator Because it is a lip structure, a double seal structure is formed by each gasket. It is. In addition, the gasket provided on the separator side of one gas diffusion layer and the gasket provided on the electrolyte membrane side of one gas diffusion layer are integrally formed through the porous structure of the gas diffusion layer, and the other gas Since the gasket provided on the electrolyte membrane side of the diffusion layer and the gasket provided on the separator side of the other gas diffusion layer are integrally formed through the porous structure of the gas diffusion layer, the porosity of the gas diffusion layer As a result of the structure being filled with some gasket molding material, the porous space is closed. Therefore, it is possible to prevent the sealed fluid (internal gas) from leaking through the porous space. Therefore, from these, the sealing performance can be further improved.

  In the fuel cell component according to claim 3 of the present invention, the gas diffusion layer is formed on the gasket provided on the separator side of one gas diffusion layer and the gasket provided on the electrolyte membrane side of one gas diffusion layer. A covering portion for covering the end face is integrally formed, and the end face of the gas diffusion layer is covered with the gasket provided on the electrolyte membrane side of the other gas diffusion layer and the gasket provided on the separator side of the other gas diffusion layer. Since the covering portion is integrally formed, it is possible to prevent the sealing fluid (internal gas) from leaking from the end surface portion of each gas diffusion layer. Therefore, the sealing performance can be further improved.

  The present invention includes the following embodiments.

1-1) One gasket proposed by the present invention has a structure in which an MEA is sandwiched by a gasket integrated with a GDL as a membrane seal of a cell of a fuel cell stack.
1-2) Further, the GDL integrated gasket is constituted by a combination of gasket A and gasket B. The gasket A has a double seal lip on the separator side. The MEA side has a flat sealing surface. The gasket B has a double-beat seal lip on both the separator side and the MEA side, and the MEA-side inner beat has a structure in which the MEA is sandwiched and sealed, so that the height of the seal lip is lowered accordingly. .
1-3) Both gaskets A and B are impregnated with liquid rubber in GDL.

2-1) One gasket proposed by the present invention reduces the area of an expensive MEA, further separates the GDL that can be replaced by a sag, and integrates the GDL and the seal to solve the problem of the current product. It is a structure to solve.
2-2) The integration of GDL and seal is a combination of two types of gaskets A and B, with double seal lip, so as not to impair the sealing performance. The configuration is as follows.
2-3) The inner side of the double lip has a lower inner height corresponding to the thickness of the MEA. The purpose of flattening a part is to improve the sealing property to reduce the deformation of the film.
2-4) In order to impregnate the porous material, the rubber material is liquid rubber, for example, two-liquid type liquid silicone rubber. Further, liquid fluoro rubber or liquid ethylene propylene rubber may be used.

3-1) In addition, one gasket proposed by the present invention is a gasket that seals between the collector electrode (separator) of the fuel cell and the reaction electrode portion, and the gasket is integrally formed on the GDL positioned so as to sandwich the MEA. To do.
3-2) A through hole is provided in the GDL, and a gasket is integrally formed so as to cover the end of the GDL.
3-3) The integral molding is performed with a LIM molding machine.
3-4) A low hardness liquid rubber material (Hs20 to 60) is used for the gasket.

4-1) Furthermore, one gasket proposed by the present invention is to separate UEA into MEA and GDL, integrate the gasket into GDL, and solve UEA by GDL sag in order to solve the problems in the prior art. Make the MEA recyclable at the time of replacement.
4-2) Since the gasket is molded into GDL, since GDL is a porous body, impregnation with liquid rubber can be considered. However, in order to improve productivity, a through hole is provided on the GDL side. Rubber is integrally molded on both sides.
4-3) In molding, only the periphery of the seal portion is clamped, and the porous portion of the reaction surface that requires a gas diffusion function is released on the mold structure so as not to be compressed. In addition, taking into account leakage in the end face direction of the GDL, the end face is covered with rubber.
4-4) The gasket material is a liquid rubber that can be injection-molded at a low pressure, and the rubber hardness is Hs20-60.

  Next, embodiments of the present invention will be described with reference to the drawings.

First embodiment ...
FIG. 1 shows a cross section of a fuel cell component (fuel cell gasket) according to a first embodiment of the present invention, and the fuel cell component is configured as follows.

  That is, first, a reaction electrode portion (MEA) 11 in which an electrolyte membrane (ion exchange membrane) 12 and electrodes with catalyst (catalyst layers) 13 and 14 are integrated is provided at the center in the vertical direction of the drawing. Gas diffusion layers (GDL) 15 and 16 made of a porous material such as carbon fiber or metal fiber are respectively stacked on the upper and lower sides of the reaction electrode portion 11 in a separate non-adhesive manner. Separators (collector electrodes) 17 and 18 are respectively stacked on the upper and lower sides of 16 to form a laminated body for one cell.

  The peripheral edge of the electrolyte membrane 12 protrudes in a planar direction from the electrodes with catalyst 13 and 14 but is set shorter than the upper and lower gas diffusion layers 15 and 16. Gaskets (seal gaskets) 19, 20, 21, and 22 are integrally formed on both surfaces of the peripheral portion.

  First of all, the gasket 19 on the separator 17 side of the upper gas diffusion layer 15 in the drawing has an outer lip 19a and an inner lip 19b, and has a double lip structure. Both the lips 19a and 19b are both separators 17. Close to. The gasket 20 on the reaction electrode portion 11 side of the gas diffusion layer 15 on the upper side in the drawing is formed in a flat shape to have a flat seal structure, and a part of the inside thereof is in close contact with the electrolyte membrane 12. Both gaskets 19 and 20 are formed by impregnating liquid silicone rubber in the gas diffusion layer 15 because the gas diffusion layer 15 has a porous structure, and are thus integrally formed with each other.

  Further, the gasket 21 on the reaction electrode portion 11 side of the gas diffusion layer 16 on the upper and lower sides of the figure has an outer lip 21a and an inner lip 21b, and has a double lip structure. The outer lip 21a serves as a flat seal of the gasket 20. The inner lip 21 b is in close contact with the electrolyte membrane 12. The inner lip 21b is formed lower in height than the outer lip 21a by the thickness of the electrolyte membrane 12. The gasket 22 on the separator 18 side of the upper and lower gas diffusion layers 16 has an outer lip 22a and an inner lip 22b, and has a double lip structure. Both the lips 22a and 22b are in close contact with the separator 18. Yes. Since the gas diffusion layer 16 has a porous structure, the gaskets 21 and 22 are formed by impregnating the gas diffusion layer 16 with liquid silicone rubber, and are thus integrally formed with each other.

The dimensions of each part are set as follows.
The thickness of the electrolyte membrane 12: 50 to 150 μm
Thickness of gas diffusion layers 15 and 16: 0.5 to 1 mm
Lip 19a, 19b, 21a, 22a, 22b height: 0.5mm
Flat seal 20 thickness: 0.3 mm
Lip 21b height: 0.4mm

  The assembly structure having the above-described structure constitutes a fuel cell as an assembled product, and is characterized by the following effects.

  That is, first, as described above, the reaction electrode portion 11 provided with the electrolyte membrane 12 and the gas diffusion layers 15 and 16 disposed on both surfaces thereof are formed separately, and the separate reaction electrode portion 11 is sandwiched from both sides thereof. Since the gaskets 19, 20, 21, and 22 are provided on both surfaces of the pair of gas diffusion layers 15 and 16, respectively, when it becomes necessary to replace the gas diffusion layers 15 and 16 due to the occurrence of sag, etc. It is only necessary to replace the gas diffusion layers 15 and 16 provided with the gaskets 19, 20, 21, and 22, while leaving the body reaction electrode portion 11. Therefore, it is not necessary to replace the electrolyte membrane 12 which is a relatively expensive component, so that the component cost or the maintenance cost can be reduced. The replacement work is very easy.

  Also, four sets of gaskets 19, 20, 21, and 22 are provided on the upper and lower surfaces of the pair of gas diffusion layers 15 and 16 that sandwich the reaction electrode portion 11 that is a non-adhesive separate structure from both sides thereof. Therefore, a cell seal portion is configured by a combination of the gas diffusion layers 15 and 16 and the gaskets 19, 20, 21, and 22, and the electrolyte membrane 12 is accommodated inside the seal portion. Therefore, since the plane area of the electrolyte membrane 12 which is a relatively expensive part can be reduced as compared with the conventional case, the part cost can be reduced accordingly.

  In addition to this, since each gasket 19, 21, 22 has a double lip structure, it can exhibit excellent sealing performance, and because the gasket 20 has a flat seal structure, This can suppress the deformation of the electrolyte membrane 12 that is in press contact.

Second embodiment ...
FIG. 2 shows a cross section of a fuel cell component (fuel cell gasket) according to a second embodiment of the present invention. The fuel cell component is configured as follows.

  That is, first, a reaction electrode portion (MEA) 11 in which an electrolyte membrane (ion exchange membrane) 12 and electrodes with catalyst (catalyst layers) 13 and 14 are integrated is provided at the center in the vertical direction of the drawing. Gas diffusion layers (GDL) 15 and 16 made of a porous material such as carbon fiber or metal fiber are stacked on the upper and lower sides of the reaction electrode portion 11 in a non-adhering manner. Separators (collector electrodes) 17 and 18 are stacked on both sides to form a stack of one cell.

  The peripheral edge of the electrolyte membrane 12 protrudes in the planar direction from the electrodes with catalyst 13 and 14 and is set to have substantially the same length (planar area) as the upper and lower gas diffusion layers 15 and 16. A required number of through holes 23 and 24 penetrating in the thickness direction are provided in the peripheral portions of the diffusion layers 15 and 16, respectively, and the gaskets 19, 20, and 24 are formed on both surfaces of the gas diffusion layers 15 and 16 through the through holes 23 and 24. 21 and 22 are integrally formed without adhesion.

  The gaskets 19 and 20 formed integrally with the gas diffusion layer 15 on the upper side in the drawing are the upper gasket 19 in close contact with the upper separator 17 and the lower gasket 20 in close contact with the electrolyte membrane 12 in the through hole 23. The film-like covering portion 26 covering the end face 15a of the gas diffusion layer 15 is integrally formed so as to cover the entire peripheral edge portion of the gas diffusion layer 15. .

  Further, the gaskets 21 and 22 formed integrally with the gas diffusion layer 16 on the upper and lower sides of the figure are penetrated by the upper gasket 21 in close contact with the electrolyte membrane 12 and the lower gasket 22 in close contact with the lower separator 18. It is integrally formed through a rubber 27 filled in the hole 24, and a film-like covering portion 28 that covers the end surface 16a of the gas diffusion layer 16 is integrally formed so that the entire peripheral portion of the gas diffusion layer 16 is formed. Covering.

  These gaskets 19, 20, 21, and 22 are formed of liquid rubber that can be injection-molded at a low pressure, and the hardness of the rubber is set to about Hs20-60.

  The assembly structure having the above-described structure constitutes a fuel cell as an assembled product, and is characterized by the following effects.

  That is, first, as described above, the reaction electrode portion 11 provided with the electrolyte membrane 12 and the gas diffusion layers 15 and 16 disposed on both surfaces thereof are formed separately, and the separate reaction electrode portion 11 is sandwiched from both sides thereof. Through holes 23 and 24 are provided in the vicinity of the peripheral edge portions of the pair of gas diffusion layers 15 and 16, and gaskets 19, 20, 21 and 22 are integrated on both surfaces of the gas diffusion layers 15 and 16 through the through holes 23 and 24. When the gas diffusion layers 15 and 16 need to be replaced due to the occurrence of sag or the like, the gaskets 19, 20, 21, and 22 are integrally molded while leaving the separate reaction electrode portion 11. It is only necessary to replace the gas diffusion layers 15 and 16 with substitutes. Therefore, it is not necessary to replace the electrolyte membrane 12 which is a relatively expensive component, so that the component cost or the maintenance cost can be reduced. The replacement work is very easy.

  In addition to this, the gaskets 19, 20, 21, and 22 cover the peripheral portions of the gas diffusion layers 15 and 16 with the covering portions 26 and 28 formed integrally therewith, and in particular, the end faces 15a and 16a of the gas diffusion layers 15 and 16. Therefore, it is possible to prevent the sealing fluid from passing through the gas diffusion layers 15 and 16 and leaking in the direction of the end faces 15a and 16a. Therefore, it is possible to provide a fuel cell component that exhibits excellent sealing performance in the end face direction.

  The fuel cell components are molded by using a rim (LIM) molding machine. As shown in FIG. 3, recesses 31 and 32 are provided in the parting portions of the mold plates 29 and 30, and gas is used for molding. Only the vicinity of the periphery of the diffusion layers 15 and 16 is clamped. If it does in this way, shaping | molding can be performed without compressing the porous part of the reaction surface of the gas diffusion layers 15 and 16 which require a gas diffusion function.

Sectional drawing of the components for fuel cells which concern on 1st Example of this invention Sectional drawing of the components for fuel cells which concern on 2nd Example of this invention Sectional view of the main part of a molding machine for molding the fuel cell components Sectional view of a conventional fuel cell 4 is an enlarged view of the main part of FIG.

Explanation of symbols

11 MEA (reaction electrode part)
12 Electrolyte membrane 13, 14 Electrode with catalyst 15, 16 GDL (gas diffusion layer)
15a, 16a End face 17, 18 Separator 19, 20, 21, 22 Gasket 19a, 19b, 21a, 21b, 22a, 22b Lip 23, 24 Through hole 25, 27 Rubber 26, 28 Cover part 29, 30 Template 31, 32 Recess

Claims (3)

A pair of gas diffusion layers (15) and (16) stacked non-adheringly on both sides of the reaction electrode part (11) provided with electrodes (13) and (14) with catalyst on both surfaces of the electrolyte membrane (12), A pair of separators (17) and (18) are arranged outside the gas diffusion layers (15) and (16), and gaskets (19) and (20) (on both sides of the gas diffusion layers (15) and (16)), respectively. 21) A fuel cell component provided with (22),
The gasket (19) provided on the separator (17) side of one gas diffusion layer (15) is in close contact with the separator (17),
The gasket (20) provided on the electrolyte membrane (12) side of one gas diffusion layer (15) is in close contact with the electrolyte membrane (12),
The gasket (21) provided on the electrolyte membrane (12) side of the other gas diffusion layer (16) is in close contact with the electrolyte membrane (12),
The gasket (22) provided on the separator (18) side of the other gas diffusion layer (16) is in close contact with the separator (18),
The gasket (19) provided on the separator (17) side of the one gas diffusion layer (15) and the gasket (20) provided on the electrolyte membrane (12) side of the one gas diffusion layer (15) , is integrally molded through the required number of through holes (23) provided in the gas diffusion layer (15),
The gasket (21) provided on the electrolyte membrane (12) side of the other gas diffusion layer (16) and the gasket (22) provided on the separator (18) side of the other gas diffusion layer (16) , The fuel cell component is integrally formed through a required number of through holes (24) provided in the gas diffusion layer (16). A pair of gas diffusion layers (15) and (16) stacked non-adheringly on both sides of the reaction electrode part (11) provided with electrodes (13) and (14) with catalyst on both surfaces of the electrolyte membrane (12), A pair of separators (17) and (18) are arranged outside the gas diffusion layers (15) and (16), and gaskets (19) and (20) (on both sides of the gas diffusion layers (15) and (16)), respectively. 21) A fuel cell component provided with (22),
The gasket (19) provided on the separator (17) side of one gas diffusion layer (15) has a double lip structure having an inner lip (19b) and an outer lip (19a) in close contact with the separator (17). ,
The gasket (20) provided on the electrolyte membrane (12) side of the one gas diffusion layer (15) has a flat seal structure having a flat seal in close contact with the electrolyte membrane (12).
The gasket (21) provided on the electrolyte membrane (12) side of the other gas diffusion layer (16) has an inner lip (21b) in close contact with the electrolyte membrane (12) and an outer lip (21a in close contact with the flat seal). ) And has a double lip structure
The gasket (22) provided on the separator (18) side of the other gas diffusion layer (16) has a double lip structure having an inner lip (22b) and an outer lip (22a) in close contact with the separator (18). ,
The gasket (19) provided on the separator (17) side of the one gas diffusion layer (15) and the gasket (20) provided on the electrolyte membrane (12) side of the one gas diffusion layer (15), Molded integrally through the porous structure of the gas diffusion layer (15),
The gasket (21) provided on the electrolyte membrane (12) side of the other gas diffusion layer (16) and the gasket (22) provided on the separator (18) side of the other gas diffusion layer (16), A component for a fuel cell, which is integrally formed through a porous structure of the gas diffusion layer (16). A pair of gas diffusion layers (15) and (16) stacked non-adheringly on both sides of the reaction electrode part (11) provided with electrodes (13) and (14) with catalyst on both surfaces of the electrolyte membrane (12), A pair of separators (17) and (18) are arranged outside the gas diffusion layers (15) and (16), and gaskets (19) and (20) (on both sides of the gas diffusion layers (15) and (16)), respectively. 21) A fuel cell component provided with (22),
The gasket (19) provided on the separator (17) side of one gas diffusion layer (15) is in close contact with the separator (17),
The gasket (20) provided on the electrolyte membrane (12) side of one gas diffusion layer (15) is in close contact with the electrolyte membrane (12),
The gasket (21) provided on the electrolyte membrane (12) side of the other gas diffusion layer (16) is in close contact with the electrolyte membrane (12),
The gasket (22) provided on the separator (18) side of the other gas diffusion layer (16) is in close contact with the separator (18),
The gasket (19) provided on the separator (17) side of the one gas diffusion layer (15) and the gasket (20) provided on the electrolyte membrane (12) side of the one gas diffusion layer (15), It is integrally formed through a required number of through holes (23) provided in the gas diffusion layer (15),
The gasket (21) provided on the electrolyte membrane (12) side of the other gas diffusion layer (16) and the gasket (22) provided on the separator (18) side of the other gas diffusion layer (16), It is integrally formed through a required number of through holes (24) provided in the gas diffusion layer (16),
The gasket (19) provided on the separator (17) side of the one gas diffusion layer (15) and the gasket (20) provided on the electrolyte membrane (12) side of the one gas diffusion layer (15) The covering portion (26) covering the end surface (15a) of the gas diffusion layer (15) is integrally formed,
The gasket (21) provided on the electrolyte membrane (12) side of the other gas diffusion layer (16) and the gasket (22) provided on the separator (18) side of the other gas diffusion layer (16) A fuel cell component comprising a covering portion (28) covering the end face (16a) of the gas diffusion layer (16).

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