JP2008130349A - Cell and stack of fuel battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cell and a stack of a fuel battery which is excellent in air supplying performance. <P>SOLUTION: The cell of a fuel battery pinches an electrolyte membrane 7 between a first to fourth plates with cathode electrode 5 and an anode electrode 6 in-between. The first and second plates are made of a conductive material which has a first and second air supplying mouths 1a, 2a penetrating in a thickness direction and a cathode electrode housing chamber 2b which is connected through the first air supplying mouth 1a and is arranged on a side of the electrolyte membrane 7 and an air exhausting mouth 2e which is connected through the cathode electrode chamber 2b and penetrates in a thickness direction. In the cathode electrode housing chamber 2b, there is housed a cathode electrode 5 which has a lot of pores connected each other and has conductivity and composes an air chamber with each of pores under the first plate. The second plate is made an air exhausting mouth 2e with one open end of the cathode electrode housing chamber 2b. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cell and a stack of a fuel cell.

  Conventionally, Patent Document 1 discloses a fuel cell. In this fuel cell, an electrolyte membrane made of a solid polymer membrane such as Nafion (registered trademark, Nafion (manufactured by Dupon)) is sandwiched between a pair of gaskets through a bipolar plate and a gasket via a cathode electrode and an anode electrode. These are laminated with their outer shapes aligned. The bipolar plate has a pair of first holes, a groove communicating with both the first holes, and a pair of second holes. The gasket has a pair of third holes communicating with the first holes, a storage chamber communicating with the third holes, and a pair of fourth holes communicating with the second holes. is doing.

  For this reason, the bipolar plate on the cathode side communicates with the first air supply port constituting a part of the air supply port, the air guide passage for communicating the first air supply port with the cathode electrode storage chamber, and the air guide passage. And a first air discharge port constituting a part of the air discharge port, a first fuel supply port constituting a part of the fuel supply port, and a first fuel discharge port constituting a part of the fuel discharge port. Will have.

  The cathode-side gasket communicates with the first air supply port and communicates with the second air supply port, the cathode electrode storage chamber, and the first air discharge port, which constitute a part of the air supply port, and discharges air. A second air discharge port that forms part of the outlet and the first fuel supply port communicate with a second fuel supply port that forms part of the fuel supply port and a first fuel discharge port, It has the 2nd fuel discharge port which comprises a part of exit.

  A conductive mesh element is accommodated in the cathode electrode storage chamber, and the conductive mesh element forms an air chamber between the bipolar plate and a number of holes communicating with each other.

  The anode-side bipolar plate communicates with the second air supply port, communicates with the third air supply port that constitutes a part of the air supply port, and the second air discharge port, and partially connects the air discharge port. A fuel guide that communicates with a third air discharge port that constitutes the second fuel supply port, a third fuel supply port that constitutes a part of the fuel supply port, and communicates the third fuel supply port with the anode electrode storage chamber A passage and a third fuel discharge port that communicates with the fuel guide passage and constitutes a part of the fuel discharge port are provided.

  The anode side gasket communicates with the third air supply port, communicates with the fourth air supply port constituting a part of the air supply port, and the third air discharge port, and constitutes a part of the air discharge port. The fourth air discharge port communicates with the third fuel supply port and communicates with the fourth fuel supply port, the anode electrode storage chamber, and the third fuel discharge port constituting a part of the fuel supply port, and the fuel discharge port. It has a 4th fuel discharge port which comprises a part of exit.

  A conductive mesh element is also housed in the anode electrode housing chamber, and the conductive mesh element forms a fuel chamber between the bipolar plate and the pores.

  A fuel cell stack can be obtained by electrically connecting a large number of these cells in series. In this stack, the oxidizing gas is supplied to the air supply port and reaches the air chamber, while the fuel is supplied to the fuel supply port and reaches the fuel chamber, and an electromotive force is generated between the bipolar plates at both ends by the electrochemical reaction between the two. Produce.

  Moreover, in this stack, since the conductive mesh element transmits the oxidant gas and the like, it is not necessary to employ a separator having an oxidant gas flow path or the like, the cell can be made thin, the power generation efficiency is improved, the output There is also an effect of improving the density, miniaturizing the fuel cell, and reducing the cost.

JP-T-2002-542591

  However, the cell employs bipolar plates and gaskets on the cathode and anode sides. For this reason, in this cell, the flow path cross-sectional area is reduced by the fuel discharge port in the anode electrode storage chamber and the air discharge port in the cathode electrode storage chamber. In a fuel cell, even if the fuel discharge port in the anode electrode storage chamber is narrowed, only the amount of fuel used is generally supplied, so that the fuel supply performance does not become a problem. However, when the air discharge port in the cathode electrode storage chamber is narrowed, there is a problem that the supply pressure of air must be increased.

  That is, in a fuel cell, air is often supplied as an oxidizing gas, and not all of the supplied gas is subjected to an electrochemical reaction. Moreover, if this air must be supplied under pressure, equipment for that purpose will be required, and mounting on a vehicle or the like will be lacking. For this reason, it has been studied to supply air to the air chamber at almost normal pressure. For this reason, if the air discharge port in the cathode electrode storage chamber is restricted, the pressure loss of the air chamber is large, and air supply performance becomes a problem.

  The present invention has been made in view of the above-described conventional situation, and an object to be solved is to provide a cell and stack of a fuel cell excellent in air supply.

The fuel cell of the present invention is a fuel cell having a cathode plate and an anode plate sandwiching an electrolyte membrane therebetween via a cathode electrode and an anode electrode,
The cathode plate communicates with an air supply port penetrating in the thickness direction, the air supply port, a cathode electrode storage chamber provided on the electrolyte membrane side, and communicates with the cathode electrode storage chamber. Having an air outlet port extending in the vertical direction,
The cathode electrode storage chamber has electrical conductivity while having many holes communicating with each other, and the cathode electrodes constituting the air chamber between the cathode plate and the holes are stored by the holes,
The anode plate communicates with a fuel supply port penetrating in the thickness direction, the fuel supply port, an anode electrode storage chamber provided on the electrolyte membrane side, and the anode electrode storage chamber. And a fuel discharge port extending in the vertical direction,
The anode electrode storage chamber has conductivity while having many holes communicating with each other, and the anode electrode constituting the fuel chamber is stored between the holes and the anode plate by the holes,
The cathode plate is characterized in that one end of the cathode electrode storage chamber is opened to serve as the air discharge port.

  In the cell of the present invention, the cathode plate and the anode plate are different, and the cathode plate has an air discharge port with one end of the cathode electrode storage chamber opened. For this reason, the pressure loss of an air chamber is small, and the air supply property is excellent.

  Therefore, according to the cell of this invention, since the supply property of air can be improved, it becomes possible to implement | achieve the system which does not require the installation for pressurizing and supplying air.

The cathode plate is
A first plate having the air supply port and an air guide passage for communicating the air supply port with the cathode electrode storage chamber;
Formed in a U-shape, and formed by joining the first plate to form the cathode electrode storage chamber and a second plate having the opening portion as the air discharge port,
The anode plate is
A fourth plate having the fuel supply port and a fuel guide passage for communicating the fuel discharge port with the anode electrode storage chamber;
It is preferable that the frame is formed of a third plate that is joined to the fourth plate to form the anode electrode storage chamber.

  In this case, the cathode plate can be easily configured by the first and second plates, and the anode plate can be easily configured by the third and fourth plates. The cathode electrode is stored in the cathode electrode storage chamber of the second plate, the anode electrode is stored in the anode electrode storage chamber of the third plate, the electrolyte membrane is sandwiched between the second and third plates, and in this state, the first electrode is stored. By joining 1-4 plates, a fuel cell can be easily constructed.

  The cathode electrode and the anode electrode include a mesh material formed in a three-dimensional mesh shape, a catalyst layer that is integrally formed on the electrolyte membrane side of the mesh material, and contacts the electrolyte membrane, and the mesh material It is preferable to have a pore layer made of carbon particles and polytetrafluoroethylene particles formed between the catalyst layers.

  By selecting the fibers, density, and the like that constitute the netting material, the pore size, conductivity, surface tension, etc. can be easily controlled. The fiber diameter is preferably 100 μm or less, the porosity is 60% or more, the thickness is 0.5 to 2 mm, and the hydrophilicity is preferably less than 50 ° in water contact angle. The netting material can be a woven fabric or a non-woven fabric. It is preferable that metal fibers are arranged as much as possible in a direction orthogonal to the electrode surface. From the viewpoint of shape retention, it is preferable to use fibers of two or more different wire diameters. It is preferable that the density of the fiber becomes higher toward the downstream side of gas or the like.

  When a mesh material made of fibers is employed, the mesh material needs to have conductivity, and therefore conductive fibers are used. As the conductive fiber, a metal fiber such as nickel or carbon can be employed in addition to a metal fiber having corrosion resistance and conductivity such as normal titanium, SUS, tantalum, and hastelloy.

  It is more preferable that the mesh material is hydrophilic as well as conductive. In order to impart hydrophilicity to the netting material, conductive and hydrophilic fibers can be used, or conductive fibers and hydrophilic fibers can be used simultaneously. As the conductive and hydrophilic fibers, conductive fibers such as nickel, titanium, SUS, tantalum, and carbon that have been subjected to hydrophilic treatment can be employed. As the hydrophilic treatment, alkali treatment, surface oxidation treatment, or the like can be employed. As hydrophilic fibers, metal oxide whiskers, plant fibers, and the like can be employed.

  The catalyst layer is integrally formed on the electrolyte side of the mesh material. The catalyst layer may have a catalyst-supporting carbon in which a catalyst is supported on carbon particles, and an electrolyte. This catalyst layer is in contact with the electrolyte membrane.

  Between the net member and the catalyst layer, there is provided a pore layer (MPL: Micro Porous Layer) having conductivity while having many pores communicating with each other. When the pore layer is provided, electrons easily move from the catalyst layer to the netting material, and water in the catalyst layer moves to the pore layer, and it is difficult to inhibit the electrochemical reaction in the catalyst layer. The pores preferably have a minimum inner diameter peak of 2 μm or less. The thickness of the pores is preferably 100 μm or less.

  The pore layer has water repellency. Thereby, the water moved into the pore layer is easily discharged from the pore layer, and the power generation efficiency and the output density are improved. Such a pore layer can be composed of carbon particles and polytetrafluoroethylene (hereinafter referred to as “PTFE”) particles. The mixing amount of PTFE is preferably 20 to 60% by mass. For water repellency, the contact angle of water is preferably 120 ° or more. While the fine pore layer bites into the net material by 50 μm or more, it is preferable that the opposite side of the biting surface has a smoothness higher than that of the net material.

  The pore layer can also contain a conductive filler. In this case, the electronic resistance is reduced, and the power generation efficiency and the output density are further improved.

The peripheral surface of the second plate is inclined with respect to the thickness direction so that the first plate side of the cathode electrode storage chamber has a large area, and the cathode electrode has a large area on the first plate side. The peripheral surface is inclined with respect to the thickness direction,
The third plate has a peripheral surface inclined with respect to the thickness direction so that the fourth plate side of the anode electrode storage chamber has a large area, and the anode electrode has a large area on the fourth plate side. It is preferable that the peripheral surface is inclined with respect to the thickness direction.

  When the second plate and the cathode electrode and the third plate and the anode electrode are formed in this way, when the first to fourth plates are stacked and electrically connected in series, the cathode electrode and the anode electrode having a mesh material are Even if it is fluffy, it is difficult to damage the electrolyte membrane by the fluff.

  Preferably, each of the plates has a rectangular shape, and the air supply port extends in the width direction on one side of the plate. In this case, the opening area of the air supply port is increased, and pressure loss is less likely to occur.

  The air supply port can be formed on the upper side of each plate. Meanwhile, the fuel supply port and the fuel discharge port may be formed at both ends on the other side of each plate. This is because, since the air discharge port in the cathode electrode storage chamber is open, it is excellent in balance to form the fuel supply port and the fuel discharge port on the left and right sides thereof.

  A stack of the fuel cell of the present invention can be configured using the cell of the present invention. The stack of the present invention is characterized in that a large number of the cells are electrically connected in series.

  According to the stack of the present invention, it is possible to improve both the current collecting property and the oxidizing gas supply property.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.

  As shown in FIGS. 1 and 2, the fuel cell of the embodiment includes a first plate 1, a second plate 2, a third plate 3, a fourth plate 4, a cathode electrode 5, an anode electrode 6, and an electrolyte membrane 7. have. The first plate 1 and the second plate 2 are cathode plates, and the third plate 3 and the fourth plate 4 are anode plates.

  The first plate 1 is a rectangular plate made of a conductive material. The first plate 1 includes a first air supply port 1a extending in the width direction on the upper side and penetrating in the thickness direction, and an air guide that extends in the width direction on the upper side and communicates with the first air supply port 1a. It has an air guide groove 1b as a passage, and a first fuel supply port 1c and a first fuel discharge port 1d that are provided in the thickness direction at both ends on the lower side.

  The second plate 2 is made of a conductive material, and has a U-shaped frame shape including an upper side and a convex portion that descends at right angles from both ends of the upper side. The second plate 2 extends in the width direction on the upper side and penetrates in the thickness direction, the second air supply port 2a communicating with the first air supply port 1a, the first air supply port 1a, and the air guide groove 1b. The second fuel communicates with the first fuel supply port 1c through the cathode electrode storage chamber 2b provided on the first plate 1 side and the electrolyte membrane 7 side, and through one projection in the thickness direction. It has a supply port 2c and a second fuel discharge port (not shown) that penetrates in the thickness direction at the other convex portion and communicates with the first fuel discharge port 1d. Thus, the second plate 2 is formed so that the lower end of the cathode electrode storage chamber 2b becomes an opening portion of the U-shaped frame, so that the second plate 2 is opened to the atmosphere and becomes the second air discharge port 2e. ing.

  The third plate 3 is made of a conductive material and has a frame shape having four sides. The third plate 3 extends in the width direction on the upper side and penetrates in the thickness direction. The third plate 3 communicates with the second air supply port 2a, a fourth fuel supply port 4c, which will be described later, and a fuel guide. A third fuel supply communicating with the second fuel supply port 2c is communicated by the groove 4b and penetrates the anode electrode storage chamber 3b provided on the fourth plate 4 side and the electrolyte membrane 7 side in the thickness direction on the left side. It has a port 3c and a third fuel discharge port (not shown) penetrating in the thickness direction on the right side and communicating with the second fuel discharge port.

  The fourth plate 4 is a rectangular plate made of a conductive material. The fourth plate 4 extends in the width direction on the upper side and penetrates in the thickness direction. The fourth plate 4 penetrates in the thickness direction at the fourth air supply port 4a communicating with the third air supply port 3a and at one end of the lower side. A fourth fuel supply port 4c communicating with the third fuel supply port 3c; a fourth fuel discharge port 4d penetrating in the thickness direction at the other end of the lower side; and communicating with the third fuel discharge port; A fuel guide groove 4b serving as a fuel guide passage that is recessed around the supply port 3c and communicates the third fuel supply port 3c with the anode electrode storage chamber 3b, and is recessed around the fourth fuel discharge port. A fuel guide groove 4e is provided as a fuel guide passage for communicating the storage chamber 3b with the fourth fuel discharge port 4d.

  The outer shapes of the first to fourth plates 1 to 4 are matched. The first to fourth air supply ports 1a, 2a, 3a, and 4a are formed in the same shape to form an air supply port, and the lower end of the cathode electrode storage chamber 2b is a second air discharge port 2e. The first to fourth fuel supply ports 1c, 2c, 3c, and 4c are also formed in the same shape to constitute the fuel supply port, and the first to fourth fuel discharge ports 1d and 4d are also formed in the same shape to form the fuel discharge port. Is configured.

  Thus, the cathode plate can be easily configured by the first and second plates 1 and 2, and the anode plate can be easily configured by the third and fourth plates 3 and 4.

  As the cathode electrode 5 and the anode electrode 6, as shown in FIG. 3, plate-like net members 5 a and 6 a formed in a three-dimensional mesh shape are employed. The mesh members 5a and 6a are formed in a three-dimensional mesh shape with conductive and hydrophilic fibers made of titanium fibers. The contact angles of water in the net members 5a and 6a are 40 ° and 30 °, respectively.

  Water repellent pore layers 5b and 6b made of carbon particles / PTFE / conductive filler are formed on the side of the electrolyte membrane 7 of the net members 5a and 6a. The contact angle of water in the pore layers 5b and 6b is more than 120 °. Further, catalyst layers 5c and 6c are formed on the electrolyte membrane 7 side of the pore layers 5b and 6b. The catalyst layers 5c and 6c include a catalyst-supporting carbon in which a catalyst is supported on carbon particles, and an electrolyte.

  The cathode electrode 5 is stored in the cathode electrode storage chamber 2 b of the second plate 2. At this time, the cathode electrode 5 is set such that the catalyst layer 5c is on the electrolyte membrane 7 side. As shown in FIG. 4, the entire circumference of the second plate 2 is inclined with respect to the thickness direction such that the first plate 1 side of the cathode electrode storage chamber 2b has a large area. Further, the entire circumference of the cathode electrode 5 is inclined with respect to the thickness direction so that the first plate 1 side has a large area.

  Further, the anode electrode 5 is stored in the anode electrode storage chamber 3 b of the third plate 3. At this time, the anode electrode 6 is arranged such that the catalyst layer 6c is on the electrolyte membrane 7 side. As for the 3rd plate 3, the whole surrounding surface inclines with respect to the thickness direction so that the 4th plate 4 side of the anode electrode storage chamber 3b may become a large area. Further, the entire circumference of the anode electrode 6 is also inclined with respect to the thickness direction so that the fourth plate 4 side has a large area.

  The electrolyte membrane 7 is made of a solid polymer membrane such as Nafion. The electrolyte membrane 7 is sandwiched between the second and third plates 2 and 3, and the first to fourth plates 1 to 4 are stacked in this state and electrically connected in series. At this time, since the entire peripheral surfaces of the cathode electrode storage chamber 2b and the anode electrode storage chamber 3b and the cathode electrode 5 and the anode electrode 6 in the second and third plates 2 and 3 are inclined as described above, the mesh material 5a, Even if the cathode electrode 5 or the anode electrode 6 having 6a is fluffy, the electrolyte membrane 7 is hardly damaged by the fluff.

  Thus, the cathode electrode 5 forms an air chamber between the first plate 1 and each of the holes communicating with each other between the fibers. The anode electrode 6 forms a fuel chamber between the fourth plate 1 and each hole. Thereby, one cell 30 is easily configured.

  Adjacent cells 30 share the first and fourth plates 1 and 4 in common. As shown in FIG. 5, a plurality of cells 30 are stacked and electrically connected in series to form a stack 31. In the stack 31, the air supply ports of all the cells 30 communicate with each other, and the fuel supply ports and the fuel discharge ports of all the cells 30 communicate with each other.

  As shown in FIG. 6, a hydrogen tank 33 is connected to the fuel supply port of the stack 31 via a valve 32. The fuel supply port of the stack 31 is connected to the outside air via a valve (not shown) for draining. Further, air as an oxidizing gas is supplied to the air supply port of the stack 31 by an air fan 34 at normal pressure, and the air discharge port of the stack 31 is connected to the outside air. The first and fourth plates 1 and 4 at both ends of the stack 31 are electrically connected to a load 35 such as an automobile motor, and the upper end of the stack 31 is connected to a radiator 37 so as to be circulated by a pump 36. Thus, the fuel cell system is configured.

  In the stack 31 configured as described above, an electromotive force is generated by an electrochemical reaction between air supplied to the air supply port and hydrogen supplied to the fuel supply port.

  At this time, in the stack 31, the lower end of the cathode electrode storage chamber 2 b is opened in the second plate 2 to be the air discharge port 2 e, so that the pressure loss of the air chamber is small and the air supply property is excellent. In particular, since air is supplied from an air supply port having a large opening area, pressure loss is less likely to occur.

  Therefore, according to the stack 31 of the embodiment, the air supply performance can be improved, so that it is possible to realize a system that does not require equipment for supplying air under pressure.

  Further, in this stack 31, the first to fourth plates 1 to 4 are made of a conductive material and do not employ a conventional non-conductive material gasket, so that the electronic resistance is small and a high output density is achieved. it can.

  Further, in the air chamber and the fuel chamber between the fibers of the mesh members 5a and 6a, the water or the residual water diffuses in the thickness direction due to the surface tension of the fibers while allowing the air or fuel to be transmitted. Residual water is not easily clogged. For this reason, in this stack 31, it is hard to produce the pressure loss of air and hydrogen, and can exhibit the outstanding supply property.

  Further, in the air chamber and the fuel chamber, the generated water and residual water are diffused in the thickness direction due to the surface tension caused by the fibers and are difficult to dry, and a stable contact area can be secured. For this reason, the stack 31 can also exhibit excellent current collecting properties.

  Furthermore, since the water-repellent pore layers 5b and 6b are provided between the mesh materials 5a and 6a and the catalyst layers 5c and 6c, electrons easily move from the catalyst layers 5c and 6c to the mesh materials 5a and 6a. In addition, the water in the catalyst layers 5c and 6c moves to the pore layers 5b and 6b, and it is difficult to inhibit the electrochemical reaction in the catalyst layers 5c and 6c.

  Moreover, in this stack 31, since the air supply port is formed in the upper side of each plate 1-4, air is supplied to the air chamber from above.

  It is also possible to supply air from below to the air chamber by turning the plates 1 to 4 upside down and the air supply port downward. In this case, the air inlet portion of the cell 30 tends to dry up due to the gas flow rate. However, the supply of air from below lowers the discharge rate of the generated water, so that drying of the inlet portion can be suppressed. Moreover, since the water vapor | steam which moved to the upper direction of each air chamber is lighter than surrounding unreacted air, it is discharged | emitted from an air chamber effectively. In this way, in each cell, humidification is performed by the generated water itself, and it is easy to automatically maintain a balance of moisture content. For this reason, the cell voltage is unlikely to decrease, and a sufficient stack voltage is easily generated stably.

  While the present invention has been described with reference to the embodiments, it is needless to say that the present invention is not limited to the above-described embodiments and can be appropriately modified and applied without departing from the spirit thereof.

  INDUSTRIAL APPLICABILITY The present invention can be used for a fuel cell system such as a moving power source for an electric vehicle, an outdoor stationary power source, and a portable power source.

It is a disassembled perspective view of the 1st-4th plate etc. which are used for the stack of an example. It is a disassembled perspective view of the 1st-4th plate etc. which are used for the stack of an example. It is a partial cross section figure of the cathode electrode used for the stack of an Example, and an anode electrode. It is sectional drawing of the cell of an Example. It is a perspective view of the stack of an Example. It is a block diagram of the fuel cell system of an Example.

Explanation of symbols

1, 2 ... Cathode plate (1 ... 1st plate, 2 ... 2nd plate)
3, 4 ... anode plate (3 ... third plate, 4 ... fourth plate)
DESCRIPTION OF SYMBOLS 7 ... Electrolyte membrane 30 ... Cell 1a, 2a, 3a, 4a ... Air supply port (1a ... 1st air supply port, 2a ... 2nd air supply port, 3a ... 3rd air supply port, 4a ... 4th air supply port )
2e ... Air discharge port 2b ... Cathode electrode storage chamber 5 ... Cathode electrode 1c, 2c, 3c, 4c ... Fuel supply port (1c ... First fuel supply port, 2c ... Second fuel supply port, 3c ... Third fuel supply port 4c ... Fourth fuel supply port)
1d, 4d ... fuel outlet (1d ... first fuel outlet, 4d ... fourth fuel outlet)
3b ... Anode electrode storage chamber 6 ... Anode electrode 1b ... Air guide passage (air guide groove)
4b, 4d ... Fuel guide passage (fuel guide groove)
5a, 6a ... Network material 5c, 6c ... Catalyst layer 31 ... Stack

Claims (5)

A fuel cell comprising a cathode plate and an anode plate sandwiching an electrolyte membrane between the cathode plate and the anode electrode via the cathode electrode and the anode electrode,
The cathode plate communicates with an air supply port penetrating in the thickness direction, the air supply port, a cathode electrode storage chamber provided on the electrolyte membrane side, and communicates with the cathode electrode storage chamber. Having an air outlet port extending in the vertical direction,
The cathode electrode storage chamber has electrical conductivity while having many holes communicating with each other, and the cathode electrodes constituting the air chamber between the cathode plate and the holes are stored by the holes,
The anode plate communicates with a fuel supply port penetrating in the thickness direction, the fuel supply port, an anode electrode storage chamber provided on the electrolyte membrane side, and the anode electrode storage chamber. And a fuel discharge port extending in the vertical direction,
The anode electrode storage chamber has conductivity while having many holes communicating with each other, and the anode electrode constituting the fuel chamber is stored between the holes and the anode plate by the holes,
The cathode of the fuel cell, wherein one end of the cathode electrode storage chamber is opened to serve as the air discharge port. The cathode plate is
A first plate having the air supply port and an air guide passage for communicating the air supply port with the cathode electrode storage chamber;
Formed in a U-shape, and formed by joining the first plate to form the cathode electrode storage chamber and a second plate having the opening portion as the air discharge port,
The anode plate is
A fourth plate having the fuel supply port and a fuel guide passage for communicating the fuel discharge port with the anode electrode storage chamber;
2. The fuel cell according to claim 1, comprising a third plate that is formed in a frame shape and is joined to the fourth plate to form the anode electrode storage chamber. 3.   The cathode electrode and the anode electrode include a mesh material formed in a three-dimensional mesh shape, a catalyst layer that is integrally formed on the electrolyte membrane side of the mesh material, and contacts the electrolyte membrane, and the mesh material 3. The fuel cell according to claim 2, further comprising a pore layer comprising carbon particles and polytetrafluoroethylene particles formed between the catalyst layers. The peripheral surface of the second plate is inclined with respect to the thickness direction so that the first plate side of the cathode electrode storage chamber has a large area, and the cathode electrode has a large area on the first plate side. The peripheral surface is inclined with respect to the thickness direction,
The third plate has a peripheral surface inclined with respect to the thickness direction so that the fourth plate side of the anode electrode storage chamber has a large area, and the anode electrode has a large area on the fourth plate side. The fuel cell according to claim 3, wherein the peripheral surface is inclined with respect to the thickness direction.   A stack of fuel cells, wherein a number of cells according to any one of claims 1 to 4 are electrically connected in series.

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