JP2009016067A - Separator and fuel cell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress invasion of water into a joining part of members (plates), and suppress reduction of joining strength in a separator in which a plurality of plates are laminated and joined. <P>SOLUTION: This is the separator 20 which includes a first plate 21 facing to an electrode opposed to a first electrode side face of a joined body having an electrolyte membrane and electrodes arranged and installed at its both faces, a second plate 22 facing to the electrode opposed to a face of a second electrode side of the joined body, and a seal member 24 arranged and installed between the first plate 21 facing to the electrode and the second plate 22 facing to the electrode, and which constitutes a fuel cell when arranged neighboring the joined body. At the first plate 21 facing to an electrode and/or the second plate 22 facing to the electrode, joining face 26 to which the seal member 24 is joined is installed. Groove parts 27a to 27c are formed along the peripheral part of the joining face 26, and on faces opposed to the groove parts 27a to 27c of the seal member 24, protruding parts 29a to 29c fitted to the groove parts 27a to 27c are formed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a separator and a fuel cell.

  2. Description of the Related Art Conventionally, a fuel cell system including a fuel cell that generates power by receiving a supply of reaction gas (fuel gas and oxidizing gas) has been proposed and put into practical use. As a fuel cell of such a fuel cell system, a stack structure in which a large number of single cells are stacked is used. The cell stack consists of a membrane electrode assembly (MEA) with a catalyst for electrodes on both sides of a solid polymer membrane that is an electrolyte, and a separator, and these are stacked. It is formed by fastening in the direction. The reaction gas is supplied to the electrode of the membrane / electrode assembly through a gas flow path provided in the separator.

In recent years, a separator having a three-layer structure (hereinafter referred to as “flat separator”) in which an intermediate plate is sandwiched between two electrode facing plates has been proposed (for example, see Patent Document 1). In such a flat separator, a channel groove serving as a gas channel or a refrigerant channel is provided in an intermediate plate, and the two electrode facing plates are not provided with a channel groove. It becomes possible.
JP 2006-164765 A

  Incidentally, the flat separator is formed by integrally joining three layers of two electrode facing plates and an intermediate plate, and the joint portion is provided in the outer peripheral portion of the separator. In the conventional configuration as described above, the joint surface between the electrode facing plate and the intermediate plate is a flat surface (a surface having no unevenness). In this way, when the joint surface between the plates is flat, when water enters from the end of the joint, peeling of the adhesive interface due to contact between the adhesive interface and water can be stopped in a certain region. As a result, there is a possibility that the peeling of the adhesive interface spreads over a wide area and the bonding strength decreases.

  This invention is made | formed in view of this situation, In the separator which laminated | stacked and joined the several plate, it suppresses the penetration | invasion of the water to the junction part of members (plates), and suppresses the fall of joining strength. The purpose is to do.

  In order to achieve the above object, a first separator according to the present invention is a first electrode facing plate that faces a surface on the first electrode side of a joined body having an electrolyte membrane and electrodes disposed on both surfaces thereof. And a second electrode facing plate facing the second electrode side surface of the joined body, and a seal member disposed between the first electrode facing plate and the second electrode facing plate. A separator that is disposed adjacent to the joined body and constitutes the fuel cell, wherein the first electrode facing plate and / or the second electrode facing plate is provided with a joining surface to which the seal member is joined, A groove is formed along the peripheral edge, and a protrusion that fits into the groove is formed on the surface of the seal member that faces the groove.

  Further, the second separator according to the present invention includes a first electrode facing plate facing the first electrode side surface of the joined body having an electrolyte membrane and electrodes disposed on both surfaces thereof, and the joined body. A second electrode facing plate facing the surface on the second electrode side, and a seal member disposed between the first electrode facing plate and the second electrode facing plate, and adjacent to the joined body A separator that is disposed and constitutes a fuel cell, the first electrode facing plate and / or the second electrode facing plate being provided with a bonding surface to which a seal member is bonded, along a peripheral edge of the bonding surface A protrusion is formed, and a groove portion for fitting the protrusion is formed on a surface facing the protrusion of the seal member.

  When such a configuration is adopted, in the joint portion between the sealing material and the first electrode facing plate and / or the joint portion between the sealing material and the second electrode facing plate, water can enter from the end face side of the joint portion. On the other hand, the groove and the protrusion formed so as to fit in the groove function as an intrusion suppressing means for preventing water from entering. In other words, since the concavo-convex shape portions such as the grooves and the protrusions have inclined surfaces that are inclined at a predetermined angle with respect to the joint surface, the water intrusion direction is changed at the connection portion between the inclined surface and the joint surface to allow water intrusion. Can be suppressed. Thereby, it is possible to prevent water from entering at the peripheral portion of the joint surface, and it is possible to prevent peeling of the adhesive interface due to water intrusion from extending beyond the peripheral portion of the joint surface to a wide area. Therefore, a decrease in adhesive strength can be suppressed, and a decrease in strength of the separator can be suppressed to improve durability.

  In the separator, a coolant channel portion is provided between the first electrode facing plate and the second electrode facing plate, a seal member and a joint surface are provided along the outer periphery of the coolant channel portion, and a coolant on the joint surface is provided. A groove (or protrusion) can be formed in the peripheral edge on the flow channel side.

  By adopting such a configuration, it is possible to prevent the adhesion interface from being peeled off at the outer periphery of the refrigerant flow path portion, so that the sealing performance of the refrigerant flow path portion can be improved.

  Moreover, in the separator, it is preferable that the groove (or protrusion) is continuously formed over the entire periphery of the periphery of the joint surface.

  When such a configuration is employed, water can be prevented from entering the joint surface from all directions. Therefore, it is possible to more reliably suppress a decrease in adhesive strength.

  In the separator, the side wall surface of the groove (or the protrusion) and the bonding surface can be connected so as to form an acute corner.

  By adopting such a configuration, it is possible to form an acute corner by the side wall surface and the joint surface of the groove (or projection), so it is possible to effectively prevent water from entering at this corner, It is possible to enhance the effect of suppressing water penetration.

  In addition, a fuel cell according to the present invention includes a laminate formed by alternately laminating a joined body having an electrolyte membrane and electrodes disposed on both surfaces thereof and the separator.

  By adopting such a configuration, it is possible to prevent the separation of the adhesive interface from proceeding beyond a certain range on the joint surfaces of the members constituting the separator. Thereby, the joining strength of each member can be increased, and the durability can be improved by suppressing the strength reduction of the separator and the fuel cell.

  ADVANTAGE OF THE INVENTION According to this invention, in the separator which laminated | stacked the several plate and joined, it becomes possible to suppress the permeation of the water to the junction part which joins members, and to suppress a joint strength fall.

  Hereinafter, with reference to FIGS. 1-7, the fuel cell 1 which concerns on embodiment of this invention, and the separator 20 used in order to comprise the fuel cell 1 are demonstrated. The fuel cell 1 is applied to, for example, an in-vehicle power generation system, and is housed in a fuel cell case (not shown) and mounted on a fuel cell vehicle.

  As shown in FIG. 1, the fuel cell 1 has a stack structure in which a large number of single cells 2 are stacked. As shown in FIG. 2, the unit cell 2 includes a joined body 10 including an electrolyte membrane 11a and an electrode 11b, and a separator 20 disposed so as to sandwich the joined body 10 from both sides. The fuel cell 1 is configured by alternately stacking the joined bodies 10 and the separators 20, thereby forming a stacked body in which a large number of single cells 2 are stacked. A cover plate 30, a terminal plate 40 with an output terminal, an insulating plate 50, and an end plate 60 are sequentially stacked on the outside of the unit cell 2 positioned at both ends of the module. The end plates 60 at both ends are joined to the end portions of the tension plate 70 by bolts or the like. Thereby, the whole laminated body of the fuel cell 1 is fastened in a state where a pressing force is applied in the stacking direction.

  Although there are a plurality of types of fuel cells including the single cell 2 such as a phosphoric acid type, the fuel cell 1 according to the present embodiment is a solid polymer electrolyte type suitable for in-vehicle use or stationary use. As the joined body 10, a membrane / electrode assembly (MEA: Membrane Electrode Assembly) in which an electrode catalyst layer such as platinum is arranged on both surfaces of an electrolyte (solid polymer membrane) made of an ion exchange membrane, or on the catalyst layer Further, a membrane / electrode / diffusion layer assembly (MEGA) provided with a gas diffusion layer can be used. In the present embodiment, MEGA is used as the bonded body 10.

  As shown in FIG. 1, the fuel cell 1 is connected to a fuel gas piping system 3, an oxidizing gas piping system 4, and a refrigerant piping system 5. The fuel cell 1 is connected to a power system, a control device, and the like (not shown). The supply and discharge of the reaction gas (oxidizing gas and fuel gas) to the fuel cell 1 is performed by the fuel gas piping system 3 and the oxidizing gas piping system 4. Electric power is generated by the unit cell 2 of the fuel cell 1 by supplying the reaction gas. The electric power generated by the fuel cell 1 is charged / discharged by the electric power system and supplied to a vehicle-mounted device (not shown). Further, supply and discharge of the refrigerant for adjusting the temperature of the fuel cell 1 are performed by the refrigerant piping system 5. Further, the piping of the gas piping system and the refrigerant piping system extends through the fuel cell case (not shown) and is connected to, for example, the end plate 60.

  As shown in FIGS. 2 and 3A, the joined body 10 is formed in a substantially flat plate shape as a whole, and a catalyst layer 11b for a pair of electrodes (air electrode and fuel electrode) on both surfaces of the electrolyte membrane 11a. , A pair of diffusion layers 12 disposed so as to sandwich the power generation unit 11 from both sides, and a seal unit 13 provided at the peripheral edge of the joined body 10 so as to surround the power generation unit 11. And.

  The diffusion layer 12 has a large number of transmission holes, and is formed of, for example, porous carbon paper, carbon cloth, or the like. The seal portion 13 is formed of, for example, a resin material such as silicon rubber, butyl rubber, or fluorine rubber, and is formed so that a gas manifold 13a for supplying and discharging reaction gas penetrates in the stacking direction. An internal gas flow path for supplying the reaction gas to the air electrode and the fuel electrode of each assembly 10 by the gas manifold 13a provided in the seal portion 13 or gas manifolds 21a and 22a provided in the separator 20 described later. Is formed. The seal portion 13 is formed with a refrigerant manifold 13b for supplying and discharging refrigerant to and from a refrigerant flow path portion 23b of the separator 20 described later at a position different from the gas manifold 13a.

  As shown in FIGS. 2 and 3B, the separator 20 includes a fuel electrode facing plate (first electrode facing plate) 21 facing the surface on the fuel electrode (first electrode) side of the assembly 10; Arranged between an air electrode facing plate (second electrode facing plate) 22 facing the air electrode (second electrode) side surface of the joined body 10, and between the fuel electrode facing plate 21 and the air electrode facing plate 22. The intermediate plate 23 (FIG. 4) and the three plates are laminated and integrally joined. The separator 20 has a shape corresponding to the planar shape of the joined body 10, and when the joined body 10 and the separator 20 are stacked, the three plates constituting the separator 20 are arranged over the entire surface of the joined body 10. Established. In the present embodiment, the fuel electrode facing plate 21 and the air electrode facing plate 22 are joined via a frame portion 24 (seal member) provided on the outer peripheral portion of the intermediate plate 23, and the frame portion 24 allows the inside of the separator 20 to be joined. The refrigerant flow path portion 25 provided in is sealed. The configuration of the joint between the frame 24 and the fuel electrode facing plate 21 and the air electrode facing plate 22 will be described later.

  The fuel electrode facing plate 21 and the air electrode facing plate 22 are flat thin plate materials, and are formed using, for example, a metal plate whose surface is plated for corrosion prevention. As the material of the metal plate, for example, titanium, titanium alloy, stainless steel, or the like can be used. Gas manifolds 21 a and 22 a are formed on the peripheral portions of the fuel electrode facing plate 21 and the air electrode facing plate 22 at positions communicating with the gas manifold 13 a of the adjacent joined body 10. Refrigerant manifolds 21b and 22b are formed at positions communicating with the refrigerant manifold 13b. The gas manifolds 21a and 22a and the refrigerant manifolds 21b and 22b penetrate the fuel electrode facing plate 21 and the air electrode facing plate 22 in the stacking direction, and can be formed by punching or the like. In addition, although the groove part (after-mentioned) is provided in the fuel electrode opposing plate 21 and the air electrode opposing plate 22, illustration of a groove part is abbreviate | omitted in FIG. 3 (B).

  As shown in FIG. 4, the intermediate plate 23 includes a frame portion 24 provided at the outer peripheral portion and a refrigerant flow path portion 25 provided inside. In the frame portion 24, a gas manifold 24a is formed at a position corresponding to the gas manifolds 21a, 22a of the adjacent fuel electrode facing plate 21 and air electrode facing plate 22, and for the refrigerant at a position communicating with the refrigerant manifolds 21b, 22b. A manifold 24b is formed. The gas manifolds 21 a and 22 a and the gas manifold 24 a form a reaction gas channel that penetrates the separator 20, and the reaction gas channel communicates with the gas manifold 13 a of the assembly 10. Similarly, a refrigerant flow path that penetrates the separator 20 is formed by the refrigerant manifolds 21 b and 22 b and the refrigerant manifold 24 b, and the refrigerant flow path communicates with the refrigerant manifold 13 b of the assembly 10. In addition, although the protrusion (after-mentioned) is provided in the flame | frame part 24 of the intermediate | middle plate 23, illustration of a protrusion is abbreviate | omitted in FIG. 3 (B) and FIG.

  The refrigerant flow path portion 25 is a flat plate, and a refrigerant flow path 25a for flowing cooling water is formed. The coolant channel 25a is a channel groove formed in the plate surface of the plate, but may be a channel hole formed so as to penetrate the plate. The refrigerant channel 25a is formed to communicate with the refrigerant manifold 24b, and the refrigerant is supplied to and discharged from the refrigerant channel 25a via the refrigerant manifold 24b. The refrigerant flow path portion 25 is made of metal like the fuel electrode facing plate 21 and the air electrode facing plate 22, but may be made of a material other than metal (resin, carbon, etc.).

  Next, the structure of the junction part of the frame part 24 of the intermediate plate 23, the fuel electrode facing plate 21 and the air electrode facing plate 22 will be described.

  As shown in FIGS. 6 and 7, the fuel electrode facing plate 21 is provided with a joining surface 26 (hatched area in FIG. 7) at a portion facing the frame portion 24 of the intermediate plate 23. As shown in FIG. 7, the joining surface 26 is provided in a band shape on the outer peripheral portion of the fuel electrode facing plate 21, and forms a seal line that surrounds the refrigerant flow path portion 25 and seals from the outside of the separator 20. . However, in the present embodiment, since the gas manifold 21a and the refrigerant manifold 21b are formed on the outer peripheral portion of the fuel electrode facing plate 21, the joint surface 26 extends from the band-shaped region to the gas manifold 21a and the refrigerant manifold 21b. It is provided in a part excluding the region.

  As shown in FIG. 6, grooves 27 a and 27 b are formed on the joint surface 26 of the fuel electrode facing plate 21. The groove portions 27a and 27b are two narrow recesses formed along the peripheral edge portion (both side portions) of the band-shaped joint surface 26. The groove portion 27a is located outside the intermediate plate 23, and the groove portion 27b is intermediate. Located inside the plate 23. As described above, the groove portions 27 a and 27 b are continuously provided over the entire peripheral edge portion of the joint surface 26. A groove 27 c is formed around the gas manifold 21 a and the refrigerant manifold 21 b provided on the joint surface 26. The cross-sectional shapes of the groove portions 27a to 27c are substantially U-shaped, and the side wall surface 28 and the joint surface 26 of the groove portions 27a to 27c are connected so as to form a corner portion that forms a substantially right angle. On the other hand, projections 29a to 29c are formed on the surface of the frame portion 24 of the intermediate plate 23 on the fuel electrode facing plate 21 side at positions facing the groove portions 27a to 27c. Each of the protrusions 29a to 29c has a shape that can be fitted into the groove portions 27a to 27c. Therefore, when the frame portion 24 of the intermediate plate 23 and the fuel electrode facing plate 21 are joined, the protrusions 29a to 29c are fitted into the groove portions 27a to 27c.

  The configuration of the joint between the air electrode facing plate 22 and the frame portion 24 of the intermediate plate 23 is the same as the configuration of the joint between the fuel electrode facing plate 21 and the frame portion 24 of the intermediate plate 23 described above. That is, a joint surface 26 is provided at a portion facing the frame portion 24 of the air electrode facing plate 22, and groove portions 27 a and 27 b are formed along the peripheral edge portions (both side portions) of the joint surface 26. Grooves 27 c are formed around the gas manifold 22 a and the refrigerant manifold 22 b provided on the joint surface 26. And the protrusion part 29a-29c fitted to the groove parts 27a-27c is formed in the surface at the side of the air electrode opposing plate 22 of the flame | frame part 24 of the intermediate | middle plate 23 in the position facing the groove parts 27a-27c. Thus, the protrusions 29 a to 29 c are formed on the upper and lower surfaces of the frame portion 24 of the intermediate plate 23, respectively, and the protrusions 29 a to 29 c join the frame portion 24 to the fuel electrode facing plate 21 and the air electrode facing plate 22. When doing, it fits into groove part 27a-27c.

  The separator 20 according to the embodiment described above includes a fuel electrode facing plate 21 that abuts on the fuel electrode side surface of the assembly 10, an air electrode facing plate 22 that abuts on the air electrode side surface of the assembly 10, and a fuel A frame portion 24 disposed between the pole facing plate 21 and the air electrode facing plate 22. The fuel electrode facing plate 21 and the air electrode facing plate 22 are provided with a joining surface 26 to which the frame portion 24 is joined, and grooves 27 a to 27 c are formed along the peripheral edge of the joining surface 26. Projections 29a to 29c that fit into the grooves 27a to 27c are provided on the surface of the frame portion 24 that faces the grooves 27a to 27c.

  With such a configuration, the groove portions 27a to 27c and the intrusion of water from the end surface side of the joint portion between the frame portion 24 and the fuel electrode facing plate 21 and the joint portion between the frame portion 24 and the air electrode facing plate 22 are prevented. The protrusions 29a to 29c fitted into the groove portions 27a to 27c function as an intrusion suppressing unit for preventing water from entering. That is, the side wall surfaces 28 of the groove portions 27 a to 27 c provided at the edges of the joint surface 26 are inclined surfaces that are inclined at a predetermined angle with respect to the joint surface 26, and at the connection portion between the side wall surface 28 and the joint surface 26. The water intrusion direction changes and water intrusion stops. As a result, water permeation is prevented at the peripheral edge of the joint surface 26. Thereby, peeling of the adhesive interface due to water intrusion can be suppressed, and peeling of the adhesive interface can be prevented from extending beyond the peripheral edge of the bonding surface 26 to a wide area. Therefore, a decrease in adhesive strength can be suppressed, and a decrease in the strength of the separator 20 can be suppressed, and the durability of the separator 20 and the fuel cell 1 can be improved.

  Further, in the separator 20 according to the embodiment described above, the coolant channel portion 25 is provided in the gap between the fuel electrode facing plate 21 and the air electrode facing plate 22, and the frame portion 24 and the joining surface 26 are formed of the coolant channel portion. The groove portions 27 a to 27 c are formed along the outer periphery of the coolant passage portion 25 side of the joint surface 26. Thereby, since peeling of the adhesion interface can be stopped at the outer periphery of the refrigerant flow path portion 25, the sealing performance of the refrigerant flow path portion 25 can be improved.

  Further, in the separator 20 according to the embodiment described above, the groove portions 27 a to 27 c are continuously formed over the entire peripheral edge portion of the joint surface 26. Thereby, the permeation of water into the joint surface 26 from all directions can be suppressed, and the necessary adhesive strength can be ensured more reliably.

  In addition, in the above embodiment, the groove parts 27a-27c and the protrusion parts 29a-29c can also be replaced. That is, narrow joints (projections) such as ribs are formed on the joint surface 26 instead of narrow recesses such as the grooves 27a to 27c, and the ribs are fitted to the frame part 24 of the intermediate plate 23. A groove to be formed may be formed. Even in such a configuration, the side walls of the ribs (projections) are inclined surfaces that are inclined at a predetermined angle with respect to the joint surface 26, so that the penetration of water is prevented as in the case of the grooves 27a to 27c. Peeling of the adhesive interface can be suppressed.

  In the above embodiment, the two groove portions 27a to 27c are formed so as to prevent water from entering the joint surface 26 from both sides. However, only the inner groove portion 27b through which the cooling water flows is provided, The groove 27a can be omitted. Further, when the refrigerant flow path is formed only on one surface of the refrigerant flow path portion 25, between the fuel electrode facing plate 21 and the air electrode facing plate 22, the plate facing the refrigerant flow path and the frame portion 24. You may provide an intrusion suppression means (a groove part and a protrusion) only in a joint surface. With such a configuration, it is possible to prevent water from entering the joint surface while reducing unevenness of the member.

  In the above embodiment, the side walls 28 and the joint surfaces 26 of the grooves 27a to 27c are connected so as to form a substantially perpendicular corner, but as shown in FIG. 8, they form an acute angle. The side wall surface 28 and the joint surface 26 of the groove portions 27a to 27c can be connected so as to form corner portions. If it does in this way, the infiltration suppression effect of water can be heightened further.

  Moreover, in the above embodiment, although the example which mounts the fuel cell which concerns on this invention in a fuel cell vehicle was shown, this invention is applied to various mobile bodies (for example, a robot, a ship, an aircraft, a train, etc.) other than a fuel cell vehicle. A fuel cell according to the above can also be mounted. Further, the fuel cell according to the present invention may be applied to a stationary power generation system used as a power generation facility for a building (for example, a house, a building, a factory, etc.).

It is a block diagram of the fuel cell which concerns on embodiment of this invention. It is sectional drawing of the cell which comprises the fuel cell shown in FIG. (A) is a disassembled perspective view of the joined body which comprises the single battery shown in FIG. 2, (B) is a disassembled perspective view of the separator which comprises the single battery shown in FIG. It is a top view of the intermediate | middle plate which comprises the separator shown to FIG. 3 (B). It is a fragmentary sectional view of the edge part of the separator shown in FIG.3 (B). FIG. 4 is an exploded cross-sectional view of an end portion of the separator shown in FIG. It is a top view of the fuel electrode opposing plate which comprises the separator shown to FIG. 3 (B). It is sectional drawing which shows the modification of the groove part provided in a fuel electrode opposing plate.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Fuel cell, 2 ... Single cell, 10 ... Assembly, 11a ... Electrolyte membrane, 11b ... Catalyst layer (electrode), 20 ... Separator, 21 ... Fuel electrode opposing plate (1st electrode opposing plate), 22 ... Air Pole facing plate (second electrode facing plate), 23 ... intermediate plate, 24 ... frame portion (seal member), 25 ... refrigerant flow path portion, 26 ... joining surface, 27a-27c ... groove, 29a-29c ... projection .

Claims (6)

A first electrode facing plate facing the first electrode side surface of the joined body having an electrolyte membrane and electrodes disposed on both sides thereof; and a second electrode facing surface of the joined body facing the second electrode side. A second electrode facing plate, and a seal member disposed between the first electrode facing plate and the second electrode facing plate, the fuel cell being configured adjacent to the assembly. A separator,
The first electrode facing plate and / or the second electrode facing plate is provided with a bonding surface to which the seal member is bonded, and a groove is formed along a peripheral edge of the bonding surface.
The surface of the seal member facing the groove is formed with a protrusion that fits into the groove.
Separator. A first electrode facing plate facing the first electrode side surface of the joined body having an electrolyte membrane and electrodes disposed on both sides thereof; and a second electrode facing surface of the joined body facing the second electrode side. A second electrode facing plate, and a seal member disposed between the first electrode facing plate and the second electrode facing plate, the fuel cell being configured adjacent to the assembly. A separator,
The first electrode facing plate and / or the second electrode facing plate is provided with a bonding surface to which the seal member is bonded, and a protrusion is formed along a peripheral edge of the bonding surface.
A groove portion for fitting the protrusion is formed on a surface of the seal member facing the protrusion.
Separator. A refrigerant flow path is provided between the first electrode facing plate and the second electrode facing plate,
The seal member and the joint surface are provided along an outer periphery of the refrigerant flow path portion,
The groove or the protrusion is formed at a peripheral edge of the joint surface on the refrigerant flow path side.
The separator according to claim 1 or 2.   The separator according to any one of claims 1 to 3, wherein the groove or the protrusion is formed continuously over the entire periphery of the periphery of the joint surface. The side wall surface of the groove or the protrusion and the bonding surface are connected so as to form an acute corner.
The separator according to any one of claims 1 to 4. Comprising a laminate comprising an electrolyte membrane and electrodes disposed on both sides thereof, and a separator according to any one of claims 1 to 5 laminated alternately.
Fuel cell.

Images