JP2016091672A - Polymer electrolyte fuel cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a polymer electrolyte fuel cell capable of suppressing deterioration in power generation performance due to moisture residence with a simple and compact structure.SOLUTION: A polymer electrolyte fuel cell includes a stack 100 where a water passage 142B connected to an oxidation gas exhaust port 122B of a separator 120 is formed to a collector plate 140 different from a collector plate 130 to which an oxidation gas exhaust port 132B is formed, and a water storage chamber 163B connected to the water passage 142B of the collector plate 140 to store water 3 and a connection port 162B are formed to an insulating plate 160 different from an insulating plate 150 to which an oxidation gas exhaust port 152B is formed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a polymer electrolyte fuel cell.

  A polymer electrolyte fuel cell is a cell in which a solid polymer electrolyte having proton conductivity is sandwiched between a gas permeable fuel electrode and an oxidation electrode, and a flow path of a fuel gas such as hydrogen gas is formed on one side. A plurality of separators having conductivity formed on the other side of the flow path of an oxidizing gas such as oxygen gas are alternately arranged, and a current collector plate and an insulating plate that are paired on the outer side in the arrangement direction are disposed, and A stack is provided that is clamped and fixed by arranging a pair of clamping plates on the outside in the arrangement direction.

  In such a polymer electrolyte fuel cell stack, when fuel gas is supplied from the fuel gas flow path of the separator to the fuel electrode of the cell, and oxidizing gas is supplied from the oxidizing gas flow path of the separator to the oxidation electrode of the cell, Hydrogen in the fuel gas is converted into protons from the fuel electrode and conducted through the solid polymer electrolyte of the cell to reach the oxygen electrode. At the same time, electrons flow through the external circuit through the current collector plate, so that protons are in the oxidizing gas. It reacts electrochemically with oxygen to produce water and at the same time powers the external circuit. And the water produced | generated by the oxygen electrode is discharged | emitted outside the stack through the oxidizing gas flow path of a separator.

  When such a polymer electrolyte fuel cell stack is mounted on, for example, an underwater vehicle that moves in the water, and when the underwater vehicle is periodically shaken by vibrations of water, the underwater vehicle is Depending on the direction and period of shaking, the water generated by the electrochemical reaction described above may stay in the oxidizing gas flow path of the separator without flowing outward from the oxidizing gas discharge port of the stack. . If such a case occurs, the oxidizing gas cannot flow through the oxidizing gas flow path of the separator, and there is a possibility that the power generation operation cannot be performed.

  For this reason, for example, in the following Patent Documents 1 and 2, etc., by providing the oxidizing gas discharge ports for discharging the water in the oxidizing gas flow path of the separator in a plurality of directions of the stack, in the direction corresponding to the inclination of the stack. It proposes that water can be discharged from the oxidant gas outlet located.

JP 2010-177148 A JP 2012-043778 A

  However, in the inventions proposed in Patent Documents 1 and 2, piping for discharging water must be attached in a plurality of directions of the stack, which becomes very complicated and quite bulky. There was a problem.

  In view of the above, an object of the present invention is to provide a polymer electrolyte fuel cell capable of suppressing a decrease in power generation performance due to water retention with a simple and compact structure.

  A solid polymer fuel cell according to a first aspect of the present invention for solving the above-described problem is a cell in which a solid polymer electrolyte is sandwiched between a fuel electrode and an oxidation electrode, and the cells are arranged alternately. A fuel gas channel for supplying fuel gas to the fuel electrode of the cell is formed on one side and an oxidizing gas channel for supplying oxidizing gas to the oxidizing electrode is formed on the other side; An oxidant gas that is formed with a fuel gas supply path for supplying fuel gas to the gas flow path and a fuel gas discharge path for discharging used fuel gas from the fuel gas flow path, and that supplies the oxidant gas to the oxidant gas path A separator formed with an oxidizing gas discharge path for discharging used oxidizing gas and water from the supply path and the oxidizing gas flow path, and a pair formed on the outside in the arrangement direction of the cell and the separator. The A fuel gas supply port connected to the fuel gas supply path of the separator, a fuel gas discharge port connected to the fuel gas discharge path of the separator, and an oxidizing gas connected to the oxidizing gas supply path of the separator A supply port and an oxidant gas discharge port connected to the oxidant gas discharge path of the separator are paired with a current collector plate formed on one or the other of the separator and an outer side in the arrangement direction of the current collector plate. The fuel gas supply port connected to the fuel gas supply port of the current collector plate, the fuel gas discharge port connected to the fuel gas discharge port of the current collector plate, the current collector plate Insulating plates formed respectively on the corresponding current collector plate side, an oxidizing gas supply port connected to the oxidizing gas supply port, an oxidizing gas discharge port connected to the oxidizing gas discharge port of the current collector plate, Absolute A fuel gas supply port connected to the fuel gas supply port of the insulating plate and a fuel connected to the fuel gas discharge port of the insulating plate, which are respectively arranged in pairs in the arrangement direction outside of the plate A gas discharge port, an oxidizing gas supply port connected to the oxidizing gas supply port of the insulating plate, and an oxidizing gas discharge port connected to the oxidizing gas discharge port of the insulating plate are respectively formed on the corresponding insulating plate side. In a polymer electrolyte fuel cell including a stack having a clamped plate, the oxidizing gas discharge path of the separator is connected to the current collecting plate different from the current collecting plate in which the oxidizing gas discharge port is formed. A water passage that connects to the insulating plate, and at least one of the insulating plate and the fastening plate that is different from the insulating plate and the fastening plate in which the oxidizing gas discharge port is formed. Connect to waterway Thus, a water storage chamber for storing water is formed.

  The polymer electrolyte fuel cell according to a second invention is characterized in that, in the first invention, the water storage chamber is formed inside the insulating plate of the stack.

  The polymer electrolyte fuel cell according to a third invention is characterized in that, in the first or second invention, a reinforcing rib is provided inside the water storage chamber of the stack.

  According to the polymer electrolyte fuel cell according to the present invention, the height position of the clamping plate in which the stack swings and the oxidizing gas discharge port is formed is higher than the height positions of the other clamping plates. In this way, the water in the oxidant gas discharge passage of the separator flows into the water storage chamber and is temporarily stored, and the height position of the clamping plate in which the oxidant gas discharge port is formed is When tilted to be lower than the height position, the water in the separator's oxidizing gas discharge passage and the water in the water storage chamber are discharged from the oxidizing gas outlet of the clamping plate to the outside of the stack. Since it is possible to greatly suppress the accumulation of water in the gas flow path, it is possible to suppress a decrease in power generation performance due to water retention with a simple and compact structure.

1 is a schematic configuration diagram of a stack of a main embodiment of a polymer electrolyte fuel cell according to the present invention. It is a schematic block diagram of one clamping plate of FIG. It is a schematic block diagram of one insulating board of FIG. It is a schematic block diagram of one current collecting plate of FIG. It is a schematic block diagram of the one surface side of the separator of FIG. It is a schematic block diagram of the other surface side of the separator of FIG. It is a schematic block diagram of the other current collection board of FIG. It is a schematic block diagram of the other insulating board of FIG.

  Embodiments of a polymer electrolyte fuel cell according to the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiments described with reference to the drawings.

<Main embodiment>
A main embodiment of a polymer electrolyte fuel cell according to the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the polymer electrolyte fuel cell according to this embodiment includes a cell 110 and a sealing material 101 in which a proton conductive solid polymer electrolyte is sandwiched between a gas permeable fuel electrode and an oxidation electrode. And a plurality of conductive separators 120 having a flow path for a fuel gas such as hydrogen gas formed on one side and a flow path for an oxidant gas such as oxygen gas formed on the other side are alternately arranged in the arrangement direction. (The left-right direction in FIG. 1) The current collector plates 130 and 140 and the insulating plates 150 and 160 that are paired on the outside are disposed, respectively, and further tightened on the outside in the arrangement direction (the left-right direction in FIG. 1). A stack 100 is provided in which plates 170 and 180 are respectively disposed and fastened.

  As shown in FIG. 2, one (left side in FIG. 1) clamping plate 170 is supplied with a fuel gas supply port 171A for supplying a fuel gas 1 such as hydrogen gas and an oxidizing gas 2 such as oxygen gas. An oxidizing gas supply port 171B for discharging, a fuel gas discharging port 172A for discharging the used fuel gas 1, and an oxidizing gas discharging port 172B for discharging the used oxidizing gas 2 and the generated water 3 are formed. .

  As shown in FIG. 3, the insulating plate 150 on one side (left side in FIG. 1) has a fuel gas supply port 151A connected to the fuel gas supply port 171A of the clamping plate 170, and the clamping plate 170. The oxidizing gas supply port 151B connected to the oxidizing gas supply port 171B, the fuel gas discharge port 152A connected to the fuel gas discharge port 172A of the clamping plate 170, and the oxidizing gas discharge port of the clamping plate 170 An oxidizing gas discharge port 152B connected to 172B is formed.

  As shown in FIG. 4, one (the left side in FIG. 1) of the current collector plate 130 includes a fuel gas supply port 131 </ b> A connected to the fuel gas supply port 151 </ b> A of the insulating plate 150, and the insulating plate 150. Connected to the oxidizing gas supply port 131B connected to the oxidizing gas supply port 151B, the fuel gas discharge port 132A connected to the fuel gas discharge port 152A of the insulating plate 150, and the oxidizing gas discharge port 152B of the insulating plate 150 An oxidizing gas discharge port 132B is formed.

  As shown in FIGS. 5 and 6, the separator 120 includes a fuel gas supply port 121A connected to the fuel gas supply ports 131A, 151A, and 171A of the plates 130, 150, and 170, and the plates 130, 150, and 170. The oxidizing gas supply ports 121B connected to the oxidizing gas supply ports 131B, 151B, 171B, the fuel gas discharge ports 122A connected to the fuel gas discharge ports 132A, 152A, 172A of the plates 130, 150, 170, and the An oxidizing gas outlet 122B connected to the oxidizing gas outlets 132B, 152B, 172B of the plates 130, 150, 170 is formed.

  Further, as shown in FIG. 5, on one surface of the separator 120, a fuel gas flow path 123A for supplying a fuel gas 1 such as hydrogen gas to the fuel electrode of the cell 110, the fuel gas supply port 121A, A fuel gas supply manifold 124A that connects the fuel gas flow path 123A, and a fuel gas discharge manifold 125A that connects the fuel gas discharge port 122A and the fuel gas flow path 123A are formed.

  Further, as shown in FIG. 6, on the other surface of the separator 120, an oxidizing gas flow path 123B for supplying an oxidizing gas 2 such as oxygen gas to the oxidizing electrode of the cell 110, the oxidizing gas supply port 121B, and the An oxidizing gas supply manifold 124B that connects the oxidizing gas flow path 123B and an oxidizing gas discharge manifold 125B that connects the oxidizing gas discharge port 122B and the oxidizing gas flow path 123B are formed.

  In this embodiment, the fuel gas supply port 121A and the fuel gas supply manifold 124A constitute a fuel gas supply path of the separator, and the fuel gas discharge port 122A and the fuel gas discharge manifold 125A discharge the fuel gas of the separator. The oxidant gas supply port 121B and the oxidant gas supply manifold 124B constitute an oxidant gas supply channel of the separator, and the oxidant gas discharge port 122B and the oxidant gas discharge manifold 125B constitute the oxidant gas discharge channel of the separator. It is composed.

  As shown in FIG. 7, the other current collector plate 140 (on the right side in FIG. 1) has a water passage 142 </ b> B connected to the oxidizing gas outlet 122 </ b> B of the separator 120.

  As shown in FIGS. 1 and 8, the other insulating plate 160 (on the right side in FIG. 1) has a water storage chamber 163 </ b> B for storing water 3 therein, and the water outlet of the current collector plate 140. A connection port 162B for connecting the water storage chamber 163B to 142B is formed.

  The other insulating plate 160, like the one insulating plate 150, is made of a material having insulation, high rigidity, ease of processing, etc., such as glass fiber reinforced plastic (GFRP), and has a sufficiently large size inside. In order to form the water storage chamber 163B, the thickness is larger than that of the one insulating plate 150.

  In the polymer electrolyte fuel cell according to this embodiment provided with such a stack 100, the fuel gas 1 such as hydrogen gas is supplied to the fuel gas supply port 171A of the clamping plate 170 of the stack 100. When the oxidizing gas 2 such as oxygen gas is supplied to the oxidizing gas supply port 171B of the fastening plate 170, the fuel gas 1 is supplied to the fuel gas supply port 151A of the insulating plate 150 and the current collecting plate 130. The fuel gas supply port 121A of each separator 120 is circulated through the fuel gas supply port 131A, flows into the fuel gas supply manifold 124A of each separator 120 and flows through the fuel gas flow path 123A. While being supplied to the fuel electrode of the cell 110, the oxidizing gas 2 is supplied to the oxidizing gas supply port 151 </ b> B of the insulating plate 150 and the current collector. 130 circulates through the oxidizing gas supply port 121B of each separator 120 via the oxidizing gas supply port 131B of 130, flows into the oxidizing gas supply manifold 124B of each separator 120, and passes through the oxidizing gas channel 123B. By flowing and being supplied to the oxidation electrode of each cell 110, hydrogen in the fuel gas 1 and oxygen in the oxidation gas 2 react electrochemically in the cell 110, and the oxidation electrode of the cell 110. Water 3 is generated on the side, and power can be supplied to the outside through the current collecting plates 130 and 140.

  The remaining fuel gas 1 that has not contributed to the electrochemical reaction in the cell 110 flows into the fuel gas discharge manifold 125A from the fuel gas flow path 123A of the separator 120 and enters the fuel gas discharge port 122A. Through the fuel gas discharge port 132A of the current collector plate 130 and the fuel gas discharge port 152A of the insulating plate 150 to the outside of the stack 100 from the fuel gas discharge port 172A of the clamping plate 170. Is done.

  In addition, the remaining oxidizing gas 2 that has not contributed to the electrochemical reaction in the cell 110, together with the water 3 generated in association with the electrochemical reaction, passes through the oxidizing gas channel 123B of the separator 120 to the oxidizing gas. The clamping plate 170 flows into the exhaust manifold 125B and flows through the oxidizing gas exhaust port 122B, and passes through the oxidizing gas exhaust port 132B of the current collector plate 130 and the oxidizing gas exhaust port 152B of the insulating plate 150. Is discharged from the stack 100 through the oxidizing gas outlet 172B.

  The polymer electrolyte fuel cell according to the present embodiment including such a stack 100 is mounted on, for example, an underwater vehicle that moves underwater, and the underwater vehicle is periodically shaken by vibration of water or the like. As a result, the stack 100, for example, periodically oscillates in the left-right direction in FIG. 1, and the height position of one (left side in FIG. 1) of the clamping plate 170 is the other (in FIG. 1). , On the right side), if inclined to be higher than the height position of the clamping plate 180, the oxidizing gas discharge manifold 125B and the oxidizing gas discharge port 122B of the separator 120 and one (left side in FIG. 1) ) Of the oxidizing gas discharge ports 132B, 152B, and 172B of the plates 130, 150, and 170 of the other plate (on the right side in FIG. 1) through the water inlet 142B of the current collector plate 140 on the other side ( In FIG. 1, right From the connection port 162B of the insulating plate 160) and flows into the reservoir chamber 163B is stored temporarily.

  In the stack 100, the height position of the other clamping plate 180 (on the right side in FIG. 1) is higher than the height position of one clamping plate 170 (the left side in FIG. 1). When tilted, the water 3 once stored in the water storage chamber 163B of the other insulating plate 160 is transferred from the connection port 162B to the water flow port 142B of the current collector plate 140 on the other side (right side in FIG. 1). Through the oxidant gas discharge port 122B of the separator 120, and exhausted to the outside through the oxidant gas discharge ports 132B, 152B, and 172B of one of the plates 130, 150, and 170 (left side in FIG. 1). Is done.

  Hereinafter, the water 3 is temporarily stored in the water storage chamber 163B of the insulating plate 160 on the other side (left side in FIG. 1) and on the one side (right side in FIG. 1) corresponding to the swing cycle. The discharge of the plates 130, 150, and 170 from the oxidizing gas discharge ports 132B, 152B, and 172B to the outside is repeated alternately.

  In other words, in the stack 100 according to the present embodiment, water is discharged from the oxidizing gas discharge ports 132B, 152B, and 172B of one of the plates 130, 150, and 170 (on the left side in FIG. 1) due to periodic swinging. When 3 cannot be discharged, water 3 is temporarily stored in the water storage chamber 163B formed inside the other insulating plate 160 (on the right side in FIG. 1), and the above-mentioned plate 130 on the one side (left side in FIG. 1). , 150, 170, when the water 3 can be discharged to the outside through the oxidizing gas discharge ports 132B, 152B, 172B, the water once stored in the water storage chamber 163B of the other insulating plate 160 (right side in FIG. 1) 3 was discharged.

  For this reason, in the stack 100 according to this embodiment, the oxidizing gas supply manifold 125B and the oxidizing gas discharge port 122B of the separator 120 and the oxidizing gas discharge ports 132B, 152B, and 172B of the plates 130, 150, and 170 are provided. It is possible to greatly suppress the accumulation of water 3.

  Therefore, according to the polymer electrolyte fuel cell according to the present embodiment, a decrease in power generation performance due to the retention of water 3 can be suppressed with a simple and compact structure.

  Further, since the water storage chamber 163B is formed inside the insulating plate 160, electrical corrosion prevention processing can be omitted for the water storage chamber 163B.

  Here, as shown in FIG. 1, it passes through the lower end portion of the fuel electrode or the oxidation electrode of the cell 110 located closest to the insulating plate 160 on the other side (right side in FIG. 1) of the stack 100. When the angle θ formed by the line (surface) F and the horizontal line (surface) L becomes the maximum inclination angle in the swing period of the stack 100, the upper surface 163Ba of the water storage chamber 163B of the insulating plate 160 is The height H of the water storage chamber 163B is set so as to be positioned above the line (surface) F.

  In addition, the amount of water 3 generated per unit time of the stack 100 is Q, the time required for one cycle of the swing of the stack 100 is C, and the inside of the water storage chamber 163B of the insulating plate 160 of the stack 100 When the volume is V, the water storage chamber 163B is set to have a thickness T, a height H, and a width W so that the following equation (1) can be satisfied.

V> α × Q × C (1)
However, α is a margin coefficient and is a numerical value of 1 or more arbitrarily set.

  At this time, since the maximum values of the height H and the width W are naturally determined from the size of the insulating plate 160 based on the size of the cell 110, the thickness T satisfies the above condition. By setting to the minimum value that can be obtained, the thickness of the insulating plate 160 can be minimized.

  In addition, it is preferable to provide a reinforcing rib inside the water storage chamber 163B because the strength of the insulating plate 160 can be increased and an increase in the thickness of the insulating plate 160 can be further suppressed.

<Other embodiments>
In the above-described embodiment, the case of the polymer electrolyte fuel cell including the stack 100 in which the water storage chamber 163B is formed on the insulating plate 160 has been described. However, as another embodiment, for example, the insulating plate Instead of the water storage chamber 163B of the plate 160, a connection port connected to the connection port 162B of the insulating plate 160 is formed in the other clamping plate 180, and a water storage chamber is formed inside the clamping plate 180. In addition, the water storage chamber 163B may be provided on the insulating plate 160 and the water storage chamber may be provided on the clamping plate 180.

  Here, when the water storage chamber is provided in the fastening plate 180, the fastening plate 180 is made of a metal material. Therefore, it is preferable to apply a coating or the like that prevents electrical corrosion on the inner wall surface of the water storage chamber. .

  In the above-described embodiment, all the openings 131A, 131B, 132A, 132B, 151A, 151B, 152A, 152B, 171A, 171B, 172A, 172B are formed in one of the plates 130, 150, 170. However, as another embodiment, for example, only the supply ports 131A, 131B, 151A, 151B, 171A, and 171B are formed in one of the plates 130, 150, and 170, and the other plate 140, 160, and 180 is formed. A fuel gas discharge port and an oxidant gas discharge port are respectively formed on one side, a water flow port is formed on one of the current collecting plates 140, and a connection port and a water storage chamber are formed on one of the insulating plate 150 and the fastening plate 170. It is also possible to do so.

  That is, a water storage chamber or the like is formed on an insulating plate or a fastening plate different from the insulating plate or the fastening plate formed with the oxidizing gas discharge port.

  In addition, since the water 3 generated by the electrochemical reaction described above is mostly on the oxidation electrode side of the cell 110, in the above-described embodiment, the insulating plate is connected to connect the water storage chamber to the oxidizing gas discharge port. However, depending on various conditions, water 3 may also be generated on the fuel electrode side of the cell 110. Therefore, as another embodiment, for example, at the fuel gas outlet It is possible to further form a water storage chamber to be connected to the insulating plate or the like.

  Since the polymer electrolyte fuel cell according to the present invention can suppress a decrease in power generation performance due to retention of water with a simple and compact structure, it can be used extremely beneficially industrially.

DESCRIPTION OF SYMBOLS 1 Fuel gas 2 Oxidizing gas 3 Water 100 Stack 101 Sealing material 110 Cell 120 Separator 121A Fuel gas supply port 121B Oxidizing gas supply port 122A Fuel gas outlet 122B Oxidizing gas outlet 123A Fuel gas channel 123B Oxidizing gas channel 124A Fuel gas Supply manifold 124B Oxidation gas supply manifold 125A Fuel gas discharge manifold 125B Oxidation gas discharge manifold 130 Current collecting plate 131A Fuel gas supply port 131B Oxidation gas supply port 132A Fuel gas discharge port 132B Oxidation gas discharge port 140 Current collecting plate 142B Water flow port 150 Insulation Plate 151A Fuel gas supply port 151B Oxidation gas supply port 152A Fuel gas discharge port 152B Oxidation gas discharge port 160 Insulation plate 162B Connection port 163B Water storage chamber 170 Tightening plate 171A Fuel Gas supply port 171B Oxidation gas supply port 172A Fuel gas discharge port 172B Oxidation gas discharge port 180 Clamping plate

Claims (3)

A cell in which a solid polymer electrolyte is sandwiched between a fuel electrode and an oxidation electrode;
An oxidant gas flow path that is arranged so as to be alternately arranged with the cells and that supplies a fuel gas to the fuel electrode of the cell on one side and that supplies an oxidant gas to the oxidation electrode. A fuel gas supply path for supplying fuel gas to the fuel gas flow path and a fuel gas discharge path for discharging used fuel gas from the fuel gas flow path are formed on the other surface and the oxidizing gas. Separators each formed with an oxidizing gas supply path for supplying oxidizing gas to the flow path and an oxidizing gas discharge path for discharging used oxidizing gas and water from the oxidizing gas flow path;
A fuel gas supply port connected to the fuel gas supply path of the separator and a fuel gas discharge path of the separator, which are arranged so as to form a pair on the outside in the arrangement direction of the cell and the separator, respectively. A fuel gas discharge port, an oxidant gas supply port connected to the oxidant gas supply path of the separator, and an oxidant gas discharge port connected to the oxidant gas discharge path of the separator are respectively formed on one or the other. An electrical board;
A fuel gas supply port connected to the fuel gas supply port of the current collector plate and a fuel gas exhaust port of the current collector plate, which are respectively arranged in pairs in the arrangement direction outside of the current collector plate. The fuel gas discharge port connected to the outlet, the oxidation gas supply port connected to the oxidation gas supply port of the current collector plate, and the oxidation gas discharge port connected to the oxidation gas discharge port of the current collector plate correspond to the collector. Insulating plates formed on the electrical plate side,
A fuel gas supply port connected to the fuel gas supply port of the insulation plate and a fuel gas discharge port of the insulation plate, which are arranged in pairs in the arrangement direction outside of the insulation plate, respectively. A fuel gas discharge port, an oxidizing gas supply port connected to the oxidizing gas supply port of the insulating plate, and an oxidizing gas discharge port connected to the oxidizing gas discharge port of the insulating plate on the corresponding insulating plate side. In a polymer electrolyte fuel cell comprising a stack having a clamp plate formed respectively,
On the current collector plate different from the current collector plate on which the oxidizing gas discharge port is formed, a water passage that connects to the oxidizing gas discharge passage of the separator is formed,
Water storage for storing water by connecting to the water flow path of the current collector plate to at least one of the insulating plate and the fastening plate different from the insulating plate and the fastening plate in which the oxidizing gas discharge port is formed A polymer electrolyte fuel cell characterized in that a chamber is formed. The polymer electrolyte fuel cell according to claim 1, wherein
The water storage chamber is formed inside the insulating plate of the stack. A polymer electrolyte fuel cell, wherein: The polymer electrolyte fuel cell according to claim 1 or 2,
A solid polymer fuel cell, wherein a reinforcing rib is provided inside the water storage chamber of the stack.

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