JP2021072250A - Fuel cell and fuel supply system - Google Patents

Abstract

To increase the reliability of fuel gas sealing.SOLUTION: A fuel cell (100) that generates electricity by chemically reacting fuel gas includes a seal (7,15) for sealing the fuel gas in the fuel cell (100), and the seal (7,15) consists of a self-healing elastomeric material.SELECTED DRAWING: Figure 4

Description

The present invention relates to a fuel cell and a fuel supply system.

The polymer electrolyte fuel cell generates electricity by chemically reacting hydrogen gas supplied as fuel gas with oxygen gas in the air. Generally, a polymer electrolyte fuel cell has a structure in which a membrane electrode assembly that undergoes the above chemical reaction is sandwiched between a pair of separators.

In order to prevent gas from leaking from the fuel cell to the outside, the fuel cell is provided with a sealing material. For example, a bead, which is a convex protrusion, is provided on the surface of the separator, and the bead comes into contact with a sub-gasket provided on the outer periphery of the membrane electrode assembly to seal the periphery of the membrane electrode assembly. A resin sealing material is arranged between the bead and the sub-gasket to improve the sealing property (see Patent Document 1).

U.S. Pat. No. 20190742524

The bead, which is formed by press molding or the like and a part of the body of the metal separator protrudes, has a large reaction force. In order to bring such a bead into contact with the sub-gasket and seal it, a large clamping force is required, and the load applied to the seal between the bead and the sub-gasket increases. If there are defects such as voids and cracks inside the seal, the defects may grow and gas leakage may occur depending on the magnitude of the load.

An object of the present invention is to improve the reliability of fuel gas sealing.

According to one aspect of the present invention, the fuel cell (100) generates electricity by chemically reacting the fuel gas, and the seal (7, 15) for sealing the fuel gas in the fuel cell (100). The fuel cell (100) is provided, wherein the seals (7, 15) are configured to include a self-healing elastomeric material.

According to another aspect of the present invention, a storage device (A1) for storing the fuel gas used for power generation of the fuel cell (100) and a filling device (A1) for filling the storage device (A1) with the fuel gas. B) and a seal (v1 to v7) provided in the storage device (A1) or the filling device (B) for sealing the fuel gas, and the seal (v1 to v7) is self-repairing. A fuel supply system (C) is provided that comprises a sex elastomeric material.

According to the present invention, the reliability of fuel gas sealing can be improved.

It is sectional drawing which shows the structure of the fuel cell of one Embodiment. It is an exploded perspective view which shows the structure of a cell schematically. It is a top view which shows the surface of a separator. It is an enlarged view in the broken line frame of FIG. It is an enlarged cross-sectional view which shows the seal of a multi-layer structure. It is a schematic diagram which shows the structure of the fuel supply system of one Embodiment.

Hereinafter, embodiments of the fuel cell and fuel supply system of the present invention will be described with reference to the drawings. The configuration described below is an example (representative example) of the present invention, and is not limited thereto.

(Fuel cell)
FIG. 1 shows the configuration of the fuel cell 100 of the present embodiment.
The fuel cell of the present embodiment is mounted on a moving body such as a vehicle, and supplies driving power to the moving body by chemically reacting fuel gas to generate electricity. However, the fuel cell is not limited to the moving body, but may be a stationary power generation system or the like. The present invention can also be applied to a fuel cell.

As shown in FIG. 1, the fuel cell 100 includes a plurality of stacked cells 10, a pair of current collector plates 11 arranged on both sides of each cell 10 in the stacking direction, a pair of insulator plates 12, and a pair. The end plate 13 of the above is provided. Further, the fuel cell 100 includes a gas pipe 14 attached to an end plate 13 on at least one side. The gas pipe 14 communicates with a manifold (not shown).

The cell 10, the current collector plate 11 on the gas pipe 14 side, the insulator plate 12, and the end plate 13 are provided with four through holes P1 to P4 that communicate with the gas pipe 14 and penetrate in the stack direction of the cell 10. .. Fuel gas is supplied and discharged through these through holes P1 to P4.

The fuel cell 100 includes a seal 15 between each member of the current collector plate 11, the insulator plate 12, the end plate 13, and the gas pipe 14. The seal 15 is, for example, an O-ring that surrounds the outside of the through holes P1 to P4 and is composed of an elastomer material. By contacting the seal 15 with each adjacent member and sealing the outer periphery of the through holes P1 to P4, gas leakage from the through holes P1 to P4 can be suppressed. The seal 15 may be composed of, for example, only an elastomer material, or may be composed of an elastomer material and a reinforcing material for maintaining the shape of the seal 15.

The pair of end plates 13 are tightened by tightening members such as bolts and nuts, and a tightening force acts on the fuel cell 100 in the stacking direction of each member of the fuel cell 100 sandwiched by the end plates 13. By this tightening force, the stack structure of each member between the end plates 13 is fixed, and the fuel gas is sealed in the fuel cell 100.

FIG. 2 schematically shows the configuration of the cell 10.
As shown in FIG. 2, the cell 10 includes a membrane electrode assembly (MEA) 3, a pair of separators 4 arranged on both sides of the MEA 3, and a sub-gasket 5 surrounding the outer peripheral edge of the MEA 3. Be prepared. The MEA 3 includes an electrolyte membrane 1 and a pair of electrodes 2. The pair of electrodes 2 sandwich the electrolyte membrane 1.

The electrolyte membrane 1 is an ionic conductive polymer electrolyte membrane. Examples of the polymer electrolyte that can be used for the electrolyte membrane 1 include perfluorosulfonic acid polymers such as Nafion (registered trademark) and Aquivion (registered trademark); aromatic systems such as sulfonated polyether ether ketone (SPEEK) and sulfonated polyimide. Polymer: Examples thereof include aliphatic polymers such as polyvinyl sulfonic acid and polyvinyl phosphoric acid.

The electrolyte membrane 1 can be a composite membrane in which a porous base material 1a is impregnated with a polymer electrolyte from the viewpoint of improving durability. The porous base material 1a is not particularly limited as long as it has voids capable of supporting the polymer electrolyte, and a porous film, a woven fabric, a non-woven fabric, a fibrill film, or the like can be used. The material of the porous base material 1a is not particularly limited, but a polymer electrolyte as described above can be used from the viewpoint of enhancing ionic conductivity. Among them, fluoropolymers such as polytetrafluoroethylene, polytetrafluoroethylene-chlorotrifluoroethylene copolymer, and polychlorotrifluoroethylene are excellent in strength and shape stability.

Of the pair of electrodes 2, one electrode 2 is an anode and is also called a fuel electrode. The other electrode 2 is a cathode and is also called an air electrode. As fuel gas, hydrogen gas is supplied to the anode and air containing oxygen gas is supplied to the cathode. In FIG. 2, black arrows represent hydrogen gas and white arrows represent air.

At the anode, a reaction occurs that produces electrons (e ⁻ ) and protons (H ⁺ _{) from hydrogen gas (H 2).} The electrons move to the cathode via an external circuit (not shown). This movement of electrons generates an electric current in an external circuit. Protons move to the cathode via the electrolyte membrane 1.

At the cathode, the electrons that have moved from an external circuit, oxygen from an oxygen (O ₂₎ gas ions (O 2 ^_-) is generated. Oxygen ions combine with protons having moved from the electrolyte membrane 1 (2H ^+), it becomes water _(H 2 O).

The electrode 2 includes a catalyst layer 21. The electrode 2 of the present embodiment includes a gas diffusion layer 22 in order to improve the diffusibility of the fuel gas. The gas diffusion layer 22 is arranged on the separator side of the catalyst layer 21.

The catalyst layer 21 promotes the reaction of hydrogen gas and oxygen gas by the catalyst. The catalyst layer 21 includes a catalyst, a carrier that supports the catalyst, and an ionomer that coats the catalyst.
Examples of the catalyst include metals such as platinum (Pt), ruthenium (Ru), iridium (Ir), rhodium (Rh), palladium (Pd), and tungsten (W), mixtures of these metals, and alloys. Among them, platinum, a mixture containing platinum, an alloy and the like are preferable from the viewpoints of catalytic activity, toxicity to carbon monoxide, heat resistance and the like.

Examples of the carrier include conductive porous metal compounds having pores such as mesoporous carbon and Pt black. Mesoporous carbon is preferable from the viewpoint of good dispersibility, large surface area, and small particle growth at high temperature even when the amount of catalyst supported is large.
As the ionomer, a polymer electrolyte having the same ion conductivity as that of the electrolyte membrane 1 can be used.

The gas diffusion layer 22 can uniformly diffuse the fuel gas supplied to the cell 10 over the entire surface of the catalyst layer 21.
The gas diffusion layer 22 can be formed by arranging a gas diffusion layer sheet as the outermost layer of the MEA3. Examples of the gas diffusion layer sheet include a porous fiber sheet such as carbon fiber having conductivity, gas permeability and gas diffusivity, and a metal sheet material such as foamed metal and expanded metal.

The sub-gasket 5 is a film or plate that surrounds the outer peripheral edge of the MEA 3 and functions as a support for the MEA 3. As the material of the sub-gasket 5, a resin having low conductivity can be used. The resin material is not particularly limited, and examples thereof include polyphenylene sulfide (PPS), polypropylene-containing polypropylene (PP-G), polystyrene (PS), silicone resin, and fluororesin.

(Separator)
The separator 4 is also called a bipolar plate. As the material of the separator 4, a conductive material such as carbon or stainless steel is used.

FIG. 3 shows the surface of the separator 4.
The separator 4 of the present embodiment has a surface provided with a recess 4a. When the surface of the separator 4 provided with the recess 4a faces the MEA3, the flow path 20 is provided between the separator 4 and the MEA3. The flow path 20 is not only a supply path for fuel gas, but also a discharge path for water generated by a chemical reaction during power generation.

The separator 4 of the present embodiment is provided with a plurality of ribs 4b on its surface. These ribs 4b provide a recess 4a on the surface of the separator 4. If the recess 4a can be provided on the surface of the separator 4, a groove may be provided on the surface of the separator 4, or both the rib 4b and the groove may be provided. The recess 4a of one separator 4 communicates from the through hole P1 to the through hole P2, and the recess 4a of the other separator 4 communicates from the through hole P3 to the through hole P4.

As shown in FIG. 3, the four through holes P1 to P4 penetrate the four corners of the separator 4, respectively. The through hole P1 is a hydrogen gas supply port, and the through hole P2 is a hydrogen gas discharge port. The through hole P3 is an air supply port, and the through hole P4 is an air discharge port. In one separator 4, the through holes P1 and P2 communicate with the flow path 20, and in the other separator 4 through holes P3 and P4, the through holes P3 and P4 communicate with the flow path 20.

(bead)
Beads 61 to 63 are provided on the surface of the separator 4. Beads 61 to 63 are convex protrusions that project toward the MEA3 side. The beads 61 to 63 seal the periphery of the MEA3 by coming into contact with the sub-gasket 5.

The bead 61 orbits the outer peripheral edge of the separator 4. The bead 62 surrounds the flow path 20 and the outside of the through holes P1 and P2 inside the bead 61. The bead 63 surrounds the outside of the through holes P3 and P4 that do not communicate with the flow path 20. These beads 61 to 63 can be formed, for example, by press-molding the body of the separator 4.

(Elastomer layer)
FIG. 4 is an enlarged view within the broken line frame of FIG. FIG. 4 corresponds to the cross section taken along line II-II in FIG.
As shown in FIG. 4, the fuel cell 100 includes an elastomer layer 7 provided between the beads 61 and 62 and the sub-gasket 5. Although not shown, an elastomer layer 7 is similarly provided between the bead 63 and the sub-gasket 5.

The elastomer layer 7 contacts the bead 61 of the separator 4 and also the sub-gasket 5, and seals the periphery of the MEA3. That is, the elastomer layer 7 is a seal that seals the fuel gas in the cell 10. Depending on the surface roughness of the beads 61 to 63, a gap may occur between the beads 61 to 63 and the sub-gasket 5, and fuel gas may leak, especially low molecular weight hydrogen gas. It can be buried to prevent gas leakage.

The elastomer layer 7 can be formed by printing, coating, injection molding, or the like using an ink for an elastomer layer containing an elastomer material or the like. Of these, printing such as screen printing is preferable from the viewpoint of ease of pattern forming.

The elastomer layer 7 preferably has a multilayer structure. Thereby, the properties such as elasticity of each layer can be made different. Further, the lamination of the plurality of layers facilitates the formation of the elastomer layer 7 having a certain thickness or more.
FIG. 5 shows an example of the elastomer layer 7 having a three-layer structure.
As shown in FIG. 5, the elastomer layer 7 has a first layer 71, a second layer 72, and a third layer 73 laminated on the tip of the bead 61 in this order.

The types or thicknesses of the elastomeric materials of the first layer 71 to the third layer 73 may be the same or different. For example, the larger the thickness, the smaller the spring constant and the smaller the reaction force of the elastomer layer 7. The elastomer layer 7 having a small reaction force can be sufficiently sealed with a small clamping force. On the other hand, the larger the reaction force, the easier it is for the sealing property to last for a long time, and the higher the reliability of the sealing. Therefore, by adjusting the type or thickness of the elastomer material so that the spring constant of the first layer 71 is large and the spring constant of the third layer 73 is small, sealing is easy and the sealing reliability is high. The elastomer layer 7 can be obtained.

The elastomer layer 7 having a multi-layer structure can be formed by repeating printing or coating a plurality of times. Among various printing methods, even in screen printing capable of forming a thick film, the thickness of the film that can be formed by one printing is usually less than 100 μm, but the thickness of 100 μm or more is obtained by multiple screen printings. The elastomer layer 7 can also be formed.

For example, even if the upper limit of the film thickness that can be formed by one printing is 80 μm, if the first layer 71 to the third layer 73 having a thickness of 50 μm is formed by printing three times, the elastomer layer 7 having a thickness of 150 μm can be formed. Can be formed. By changing the thickness of the first layer 71 to 80 μm, the thickness of the second layer 72 to 60 μm, and the thickness of the third layer 73 to 10 μm, the spring constant of each layer can be adjusted.

If the elastomer layer 7 can be arranged between the separator 4 and the sub-gasket 5, the elastomer layer 7 may be arranged at the tips of the beads 61 to 63 and then faced with the MEA3, or the beads of the sub-gasket 5 may be arranged. After arranging the elastomer layer 7 at a position facing 61 to 63, the elastomer layer 7 may be faced with the separator 4.

(Self-healing elastomer material)
The elastomer layer 7 is composed of a self-healing elastomer material. Self-healing refers to the function of recombining and recovering the cut site even if the elastomer material is damaged. The recombination may be, for example, a covalent bond, a hydrogen bond, an ionic bond or a coordination bond, or a bond due to an electrostatic interaction, a hydrophobic interaction, a π-electron interaction or an intermolecular interaction other than these. You may.

The elastomer layer 7 may be a layer composed of only a self-healing elastomer material, or may contain other elastomer materials, additives, etc. as long as the effects of the present invention are not impaired.

In the case of the elastomer layer 7 having a multi-layer structure, since the layers constituting the elastomer layer 7 are combined to form one layer, the elastomer layer 7 having excellent durability can be obtained without peeling between the layers. The beads 61 to 63 themselves may be replaced with the elastomer layer 7 by laminating a plurality of layers and bonding the layers to form a thick elastomer layer 7.

A known material can be used as the self-healing elastomer material. Known materials include, for example, a hard segment made of a hard polymer having a glass transition temperature of 150 ° C. or higher and a soft segment made of a soft polymer having a glass transition temperature of −30 ° C. or lower, and a certain amount of disulfide. Multi-block copolymer having a bond (see Japanese Patent Application Laid-Open No. 2018-39876), polymer material containing a crosslinked polymer crosslinked by interaction with a host group and a guest group (see International Publication No. 2017/159346), scandium. "Synthesis of Self-Healing Polymers by Scandium-Catalyzed Copolymerization of Ethylene and Anisylpropylenes", 5 outside Haobing Wang, J. Am. Chem. Soc., American Chemical Society , 2019, 141, p.3249-3257), etc., but is not limited thereto.

Among them, the self-healing elastomer material is preferably a self-healing material even when water molecules are present and no action for self-repair is input from the outside.
The seal of the fuel cell 100 is in an environment where hydrogen gas is supplied during power generation and water is generated. According to the above-mentioned elastomer material, self-repair is possible even in such an environment. Further, even if an action other than the action of the fuel cell 100 itself, for example, an action of applying energy such as irradiation with infrared rays or ultraviolet rays, heating or pressurization, is not input from the outside of the fuel cell 100, the elastomer material may self-repair. For example, it is not necessary to add an action for self-repair to the seal arranged in the fuel cell 100. Therefore, it is possible to omit a device and work for applying an action from the outside of the fuel cell 100 separately from the fuel cell 100.

Further, it is preferable that the elastomer material having self-repairing property is bonded and repaired by contact between the elastomer materials. As described above, since the fuel cell 100 is tightened by the tightening member in the stacking direction of each member of the fuel cell 100, the seal is also tightened in the stacking direction. Therefore, the seal is easily crushed by the members on both sides of the seal due to the shaking of the vehicle during traveling, the thermal expansion of the electrolyte membrane 1 during power generation, the wet expansion, and the like. Since the crushed seal spreads in the in-plane direction, contact between the cut portions of the elastomer material is likely to occur, and spontaneous self-repair is facilitated even when no action from the outside of the fuel cell 100 is input.

The tightening member for tightening the seal may be a fixing member for fixing the stack of the cell 10, and the tightening direction may be the in-plane direction of the cell 10 instead of the stack direction. Further, the seal may be provided with a tightening force for promoting contact with the elastomer material by a tightening member provided separately from the tightening member for fixing each member of the fuel cell 100.

Examples of the material having self-repairing property even when water molecules are present and no external action is input include the above-mentioned copolymer of ethylene and anisylpropylene. It has been confirmed that the above-mentioned copolymer of ethylene and anisylpropylene exhibits self-repairing properties similar to those under dry conditions even in water and in the presence of 1M NaOH or 1M HCl. It has also been confirmed that the self-repairing of the above ethylene-anisylpropylene copolymer does not require an external action such as irradiation with ultraviolet rays, and occurs spontaneously by contact with the cutting site.

As described above, according to the fuel cell 100 of the present embodiment, the elastomer layer 7 which is a seal is formed by using the self-healing elastomer material. In the fuel cell 100, the electrolyte membrane 1 is likely to shrink and expand, and since the vehicle vibrates a lot during traveling, the load on the elastomer layer 7 is large, and cut portions such as cracks may occur. However, since the elastomer layer 7 can recombine the cut portion by self-repair, the sealing of the fuel cell 100 can be continued. Therefore, the reliability of the fuel gas sealing can be improved.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and modifications can be made within the scope of the gist thereof.

(Modification example 1)
A self-healing elastomer material can be used not only for the elastomer layer 7 but also for any of the seals provided on the fuel cell 100.
For example, by forming the seal 15 provided between each plate 11 to 13 and between the plate 13 and the gas pipe 14 containing a self-healing elastomer material, it is possible to recover the damaged portion even if the seal 15 is damaged. , The reliability of fuel gas sealing is improved.

(Modification 2)
Not limited to the seal, the sub-gasket 5 is preferably configured to include the self-healing elastomer material described above. Not only can the damage of the sub-gasket 5 be recovered, but also the separate sub-gasket 5 and the elastomer material of the elastomer layer 7 are combined by the self-repairing property to form one member, and the sealing property is further improved because there is no gap.

(Modification example 3)
Not only the fuel cell 100 but also the fuel gas can be sealed when the fuel gas is supplied to the fuel cell 100. Therefore, the self-healing elastomer material can also be used in the seal used in the fuel supply system described later.

(Fuel supply system)
FIG. 6 schematically shows the configuration of the fuel supply system C of the present embodiment.
The fuel supply system C of the present embodiment supplies hydrogen gas as a fuel gas used for power generation of the fuel cell 100 mounted on the four-wheeled vehicle A. The fuel cell 100 supplies the driving power of the vehicle A, but the target of supplying the power is not limited to the four-wheeled vehicle A, but may be a three-wheeled or two-wheeled vehicle, or a movement of a ship, an aircraft, or the like. It may be a body.

As shown in FIG. 6, the fuel supply system C includes a storage device A1 for storing hydrogen gas and a filling device B capable of filling the storage device A1 with hydrogen gas. In the present embodiment, the fuel cell 100 and the storage device A1 are mounted on the vehicle A, and the filling device B is installed on the hydrogen station.

In addition to the fuel cell 100 and the storage device A1, the vehicle A is equipped with the battery A2 and the motor A3. The storage device A1 supplies the hydrogen gas to be stored to the fuel cell 100. The battery A2 stores the electric power generated by the fuel cell 100 and supplies it to the motor A3 as the driving power of the vehicle A. The motor A3 drives the vehicle A by driving power.

The filling device B includes a pressure accumulator B1, a precooler B2, a dispenser B3, and the like. The accumulator B1 stores the compressed hydrogen gas, and the precooler B2 cools the hydrogen gas in the accumulator B1 and sends it to the dispenser B3. The dispenser B3 includes an operation panel, and fills the storage device A1 on the vehicle A side with hydrogen gas cooled according to the operation from the operation panel.

Further, the fuel supply system C includes a connection portion for connecting the transfer destination and the transfer source of the hydrogen gas, and this connection portion includes a seal for sealing the fuel gas. Specifically, the storage device A1 includes a first connection portion A4 connected to the filling device B. The first connection portion A4 is, for example, a resector pull (receptacle) provided on the vehicle body or the like of the vehicle A. On the other hand, the filling device B includes a second connecting portion B4 connected to the storage device A1. The second connection portion B4 is, for example, a nozzle provided in the dispenser B3 to discharge gas. The tip of the nozzle has a shape that fits with the resector pull. During filling, the nozzle is fixed in a fitted state, and when filling is completed and decompression is completed, the nozzle is released from fitting.

The first connection portion A4 includes a seal v7, and the second connection portion B4 includes a seal v6. The seal v7 is provided, for example, as a surface layer that covers the fitting portion with the nozzle of the resector pull. The seal v6 is, for example, an O-ring provided at a fitting portion of the nozzle with the resector pull. Both the first connection portion A4 and the second connection portion B4 may have a seal, or one of them may have a seal.

Seals v6 and v7 are configured to include the self-healing elastomeric material described above. Even if the seals v6 and v7 are damaged, they are repaired, so that the reliability of the fuel gas sealing can be improved.

The seal may be provided not only between the storage device A1 and the filling device B, but also at each connection portion connecting the transfer destination and the transfer source. For example, as other seals, the seal v1 provided for importing the accumulator B1 with the gas pipe, the precooler B2, the dispenser B3, the fuel cell 100, and the import and outlet with the gas pipe of the storage device A1 are provided. Examples thereof include seals v2 to v5. These seals v1 to v5 can also be configured to include the above-mentioned self-healing elastomer material in order to improve the reliability of fuel gas sealing.

The configuration of the fuel supply system C is an example, and the present invention is not limited to this. For example, the vehicle A may not be provided with the battery A2, and the electric power generated by the fuel cell 100 may be supplied to a drive device such as the motor A3. Further, the filling device B may be mounted on the moving body, and the target for supplying electric power may not be the moving body but may be a portable generator, a stationary generator, or the like.

100 ... Fuel cell, 10 ... Cell, 1 ... Electrolyte membrane, 2 ... Electrode, 3 ... Membrane electrode assembly, 4 ... Separator, 5 ... Sub-gasket, 61- 63 ... Bead, 7 ... Elastomer layer, 15 ... Seal, C ... Fuel supply system, A1 ... Storage device, B ... Filling device, v1 to v7 ... Seal

Claims (11)

A fuel cell (100) that generates electricity by chemically reacting fuel gas.
A seal (7,15) for sealing the fuel gas in the fuel cell (100) is provided.
The seals (7,15) contain a self-healing elastomeric material.
Fuel cell (100). A membrane electrode assembly (3) comprising an electrolyte membrane (1) and a pair of electrodes (2) arranged on both sides of the electrolyte membrane (1).
A sub-gasket (5) surrounding the outer peripheral edge of the electrolyte membrane (1) and
A pair of separators (4) arranged on both sides of the membrane electrode assembly (3) are provided.
The seals (7, 15) are provided between the separator (4) and the sub-gasket (5).
The fuel cell (100) according to claim 1. The separator (4) is provided with protrusions (61 to 63) on the surface facing the sub-gasket (5).
The seals (7, 15) are arranged between the tips of the protrusions (61-63) and the sub-gasket (5).
The fuel cell (100) according to claim 2. The seals (7, 15) have a multi-layer structure.
The fuel cell (100) according to any one of claims 1 to 3. The elastomer material has self-healing properties even when water molecules are present and no action for self-healing is input from the outside.
The fuel cell (100) according to any one of claims 1 to 4. The seal is tightened by each member constituting the fuel cell (100).
The self-healing elastomeric materials that have come into contact with each other due to the tightening are bonded to each other.
The fuel cell (100) according to any one of claims 1 to 5. The sub-gasket (5) contains the self-healing elastomeric material.
The fuel cell (100) according to claim 2. A pair of current collector plates (11), a pair of insulator plates (12) and a pair of end plates (13) arranged on both sides of the pair of separators (4), respectively.
A gas flow path (14) provided in the end plate (13) is provided.
The current collector plate (11), the insulator plate (12), and the end plate (13) are provided with through holes (P1 to P4) communicating with the gas flow path (14).
The seals (7, 15) are arranged between the plates (11 to 13) and surround the outer periphery of the through holes (P1 to P4).
The fuel cell (100) according to claim 1. A fuel supply system that supplies fuel gas used to generate electricity in a fuel cell (100).
A seal (v1 to v7) for sealing the fuel gas is provided.
The seals (v1-v7) contain a self-healing elastomeric material.
Fuel supply system (C). A storage device (A1) for storing fuel gas used for power generation of a fuel cell (100).
A seal (v4, v5, v7) for sealing the fuel gas is provided.
The seals (v4, v5, v7) contain a self-healing elastomeric material.
Storage device (A1). A filling device (B) for filling a storage device (A1) for storing fuel gas used for power generation of a fuel cell (100) with the fuel gas.
A seal (v1 to v3, v6) for sealing the fuel gas is provided.
The seals (v1-v3, v6) contain a self-healing elastomeric material.
Filling device (B).

Images