WO2017016061A1

WO2017016061A1 - Cathode plate for air cooling-type proton exchange membrane fuel cell

Info

Publication number: WO2017016061A1
Application number: PCT/CN2015/090867
Authority: WO
Inventors: 李骁; 赵锋
Original assignee: 武汉众宇动力系统科技有限公司
Priority date: 2015-07-28
Filing date: 2015-09-28
Publication date: 2017-02-02
Also published as: CN105470527B; CN105470527A

Abstract

Provided is a cathode plate for an air cooling-type proton exchange membrane fuel cell. The cathode plate is prepared using a porous graphite material; an oxidant is charged into or discharged out of the proton exchange membrane fuel cell through holes in the porous graphite material, wherein the cathode plate comprises two fuel through holes (1), used as a fuel inlet and a fuel outlet respectively; a sealing gasket (2) with a through hole (3) is provided in the fuel through holes (1) and is used for separating the fuel through holes (1) from the holes in the porous graphite material; and the fuel is charged into or discharged out of the proton exchange membrane fuel cell through the through holes (3) in the sealing gasket (2). Thereby, the cathode plate has obvious advantages in achieving a cathode plate, for a proton exchange membrane fuel cell, having a light weight.

Description

Cathode plate for air-cooled proton exchange membrane fuel cell

Technical field

The present invention relates to the field of fuel cells, and more particularly to a cathode plate for an air cooled proton exchange membrane fuel cell and related fuel cells and fuel cell stacks.

Background technique

A proton exchange membrane fuel cell is an electrochemical device that directly converts the chemical energy of a reactant into electrical energy. Electrode plates (including cathode plates and anode plates) are an important component of proton exchange membrane fuel cells, generally accounting for 50%-80% of the total weight of the entire fuel cell stack, and 30-40% of the total cost, including conduction Important functions such as gas supply, mechanical support and heat dissipation. Therefore, the electrode plate should have the following properties: 1) good electrical and thermal conductivity; 2) good chemical stability and corrosion resistance; 3) good air tightness; 4) high mechanical strength; 5) uniform distribution fluid.

The electrode plates of the prior art, that is, the anode plate and the cathode plate, all adopt the same electrode plate standard, and a uniform material is also used in material selection. Currently used electrode plate materials are metal, non-porous graphite and resin/graphite composite materials, which are generally prepared by etching, stamping, or machining, compression molding, and the like.

The electrode plate made of metal material has a higher density, but because of its good ductility, it can be made very thin. Generally, the anode plate can be made 0.5 mm thick, and the cathode plate can be made thinner (can reach 0.1). -0.2mm), such as Chinese invention patent 200710056414.6 (application number). By forming an air passage by bending, the total weight or volume of the stack can be effectively controlled, and the power density of the stack can be increased. The flow path of the metal material electrode plate is easy to be processed in batches, but generally requires subsequent processing (including degreasing, polishing, and surface coating, etc.). In addition, the corrosion resistance of metal materials is insufficient, especially cathode plates made of metal materials, because they are in a corrosive atmosphere containing water vapor and oxygen for a long time. This requires an excellent anticorrosive material to protect the cathode plate substrate, which greatly increases the cost of preparation. In addition, when a processing such as punching or bending is performed, defects and stress are formed in the electrode plate, which affects the service life of the electrode plate. All in all, the advantages of the metal material electrode plate are that it has good thermal conductivity and electrical conductivity, is easy to process, and can greatly reduce the volume or weight; but there are still insufficient corrosion resistance, complicated process, expensive plating layer, high contact resistance, etc. Disadvantages.

The non-porous graphite material has a low density (1.8 to 2.3 g/cm3), but since the material itself is very brittle, it is very prone to breakage and cracking, so the electrode plates prepared from the non-porous graphite material are generally thick. Especially for the electrode plates of air-cooled fuel cells, it is required to have a large air passage on one side of the cathode plate, which increases the weight and volume of the fuel cell stack. In short, the non-porous graphite electrode plate is characterized by excellent chemical stability and corrosion resistance, and the preparation process is simple; however, the size is thick, and the volume and weight are large.

The resin/graphite composite material can reduce the weight of the electrode plate to a certain extent, for example, Chinese invention patent 201310703420.1 (application number). However, due to the addition of a non-conductive and poorly thermally conductive resin material to the graphite, the conductivity and heat dissipation of the electrode plate are reduced. In addition, during the molding process, the resin penetrates into the surface to form a resin film, which greatly causes an increase in the contact resistance of the electrode plate, and the polishing process of the resin film increases the process and cost.

Summary of the invention

Embodiments of the present invention provide an improved cathode plate for an air-cooled proton exchange membrane fuel cell, which has advantages in achieving light weight of the cathode plate.

According to an aspect of the invention, there is provided a cathode plate for a proton exchange membrane fuel cell, which is made of a porous graphite material through which an oxidant is introduced/derived through the pores in the porous graphite material battery;

Wherein the cathode plate includes two fuel through holes respectively serving as a fuel inlet and a fuel outlet, and a gasket having a through hole for providing the fuel through hole and the porous body in the fuel through hole The holes in the graphite material are separated; and,

Wherein, the fuel is introduced/derived through the through holes in the gasket to the proton exchange membrane fuel cell.

According to an embodiment of the invention, the upper and lower end faces of the gasket protrude from the cathode plate.

According to an embodiment of the invention, the gasket is provided with a rigid filler.

According to an embodiment of the invention, the gasket is made of rubber, and the rigid filler is made of a metal material or a composite material or engineering plastic capable of meeting rigidity requirements.

According to an embodiment of the present invention, a cathode plate for a proton exchange membrane fuel cell further includes: an oxidant flow path disposed in the porous graphite material of the cathode plate.

According to an embodiment of the invention, the oxidant flow path is constituted by a plurality of grooves provided in the porous graphite material.

According to an embodiment of the invention, the oxidant flow path is constituted by a plurality of hollow holes provided in the porous graphite material.

According to an embodiment of the present invention, the porous graphite material has a thermal conductivity of not less than 100 W/m·K, a compressive strength of not less than 1.2 MPa, and a porosity of not less than 40%.

According to another aspect of the present invention, an air-cooled proton exchange membrane fuel cell is provided, comprising:

a cathode plate according to the foregoing aspect of the invention;

a membrane electrode disposed under the cathode plate, wherein the membrane electrode is provided with a proton exchange membrane and two membrane electrode through holes respectively communicating with the two fuel through holes;

a sealing ring disposed under the membrane electrode for sealing a space below the membrane electrode;

An anode plate disposed under the sealing ring, wherein the anode plate is provided with a fuel flow channel, and two ends of the fuel flow channel are provided with two anode plates respectively communicating with the two membrane electrode through holes A through hole forms a fuel delivery passage for the fuel cell.

According to still another aspect of the present invention, an air-cooled proton exchange membrane fuel cell is provided Heap, including:

Upper end plate

An upper current collecting plate disposed under the upper end plate;

a fuel cell stack disposed under the upper current collecting plate and stacked by at least one of the proton exchange membrane fuel cells of the foregoing aspect of the invention; wherein the two anode plate through holes of each fuel cell are respectively phased Two fuel through holes included in the cathode plate of the adjacent fuel cell are connected;

a lower current collecting plate disposed under the fuel cell stack;

a lower end plate disposed below the lower collector plate;

a fixing bolt penetrating the upper end plate and the lower end plate to press the upper collecting plate, the fuel cell stack and the lower collecting plate between the upper end plate and the lower end plate;

Wherein the fuel inlet and the fuel outlet are disposed in either one of the upper end plate and the lower end plate, or are respectively disposed; the positions of the fuel inlet and the fuel outlet correspond to the fuel through holes in the fuel cell stack And providing a collector plate through hole respectively communicating with the fuel inlet and the fuel outlet on either or both of the upper header and the lower header, such that the fuel inlet and the fuel outlet are disposed at The fuel through holes in the fuel cell stack are in communication.

A cathode plate for a proton exchange membrane fuel cell provided by an embodiment of the present invention is reasonably considered that the working environment of the cathode plate is different from that of the anode plate, that is, the cathode plate has no airtightness requirement except for the position of the fuel passage. Therefore, the same manufacturing standards as those of the anode plate are not employed as in the prior art, but porous graphite is proposed as a material for preparing the cathode plate. The porous graphite material not only inherits the excellent chemical stability and corrosion resistance of graphite, but also maintains the electrical conductivity and mechanical strength of graphite. More importantly, because the porous graphite material has a uniformly distributed pore structure, the weight of the cathode plate is greatly reduced; and the uniformly distributed pore structure also greatly increases the surface area of the cathode plate, so that the heat dissipation performance of the cathode plate is also Get promoted. In addition, since the uniformly distributed pores in the porous graphite material can serve as the oxidant passage, the reduction reaction and thermal management of the cathode can be realized without additionally preparing the oxidant flow passage, and the oxidant can participate in the reaction anywhere in the cathode plate. All-round contact, more even distribution, reducing mass transfer resistance and improving battery performance; At the same time, the preparation process of the cathode plate can be: the production of a large porous graphite brick, and then cutting into a cathode plate of a suitable size as needed, thereby further reducing the difficulty of mold manufacturing and machining, reducing equipment and manufacturing cost.

DRAWINGS

1 is a schematic view showing the structure of a cathode plate for a proton exchange membrane fuel cell according to an embodiment of the present invention.

2 is a schematic view showing the structure of a cathode plate for a proton exchange membrane fuel cell according to an embodiment of the present invention.

Figure 3 shows the results of weight comparison of cathode plates of the same specification formed from different materials.

4 is a cross-sectional view, taken along line A-A of FIG. 2, of a cathode plate for a proton exchange membrane fuel cell according to an embodiment of the present invention.

Fig. 5 is a cross-sectional view, taken along line A-A of Fig. 2, of a cathode plate for a proton exchange membrane fuel cell according to another embodiment of the present invention.

FIG. 6 is a schematic structural view of a cathode plate for a proton exchange membrane fuel cell according to an embodiment of the present invention.

FIG. 7 is a schematic structural view of a cathode plate for a proton exchange membrane fuel cell according to an embodiment of the present invention.

FIG. 8 is an exploded perspective view of a proton exchange membrane fuel cell according to an embodiment of the present invention.

FIG. 9 is a schematic structural view of a proton exchange membrane fuel cell stack according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. based on All other embodiments obtained by those skilled in the art without creative efforts are within the scope of the present invention.

Since it is considered that the working environment of the anode plate and the cathode plate is very different, it is not necessary for the cathode plate to adopt the same preparation materials and standards as in the prior art. For example, in an open air-cooled proton exchange membrane fuel cell, the cathode plate is required to have: 1) a channel for the input and output of a fuel (eg, hydrogen); 2) good thermal and electrical conductivity. 3) outstanding chemical stability and corrosion resistance; 4) ensure adequate and uniform supply of oxidant. Therefore, on the basis of satisfying the above conditions, the cathode plate does not need to ensure the airtightness of the material itself as the anode plate. This provides the necessary space for the weight reduction of the cathode plate, and this is one of the theoretical basis of the technical solution of the present invention.

1 and 2 are schematic views showing the structure of a cathode plate for a proton exchange membrane fuel cell according to an embodiment of the present invention. As shown in FIG. 1 and FIG. 2, the cathode plate is made of a porous graphite material, and the oxidant is introduced into/out of the proton exchange membrane fuel cell through a hole in the porous graphite material; wherein the cathode plate includes two fuel through holes 1 Provided as a fuel inlet and a fuel outlet, respectively, in which a gasket 2 having a through hole is provided in the two fuel through holes 1 for separating the fuel through hole 1 from an aperture inherent in the porous graphite material, The fuel is introduced/exported into the proton exchange membrane fuel cell through the through holes 3 in the two gaskets 2. The gasket 2 isolates the fuel passing through the through holes 3 in the gasket 2 and the oxidizing agent passing through the pores inherent in the porous graphite material.

In an embodiment of the invention, the gasket 2 can be made of rubber.

In an embodiment of the invention, the oxidant may be oxygen in the air and the fuel may be hydrogen. The proton exchange membrane fuel cell thus formed is an open air-cooled proton exchange membrane fuel cell. However, the present invention does not limit the types of oxidizing agents and fuels.

It will also be understood by those skilled in the art that the specific location of the fuel through hole 1 may depend on the specific delivery mode of the fuel, and the fuel inlet and the fuel outlet may also have multiple pairs. For example, when the fuel flow path on the anode plate has a plurality of anode plate through holes and are respectively located at different positions of the anode plate, a plurality of fuel through holes 1 distributed at different positions may be correspondingly disposed on the cathode plate. However, the present invention is directed to arranging fuel through holes 1 The number and location are not limited.

In order to verify the performance of the fuel cell cathode plate of the embodiment of the present invention, the inventors conducted a series of comparative tests using cathode plates of different materials. The test results are shown in the following table:

As can be seen from the above table, the porous graphite material has a very small density and has outstanding advantages in meeting the lightweight design of the fuel cell stack; at the same time, in other performance performance (such as electrical conductivity, thermal conductivity, contact) Resistors), porous graphite materials can also meet the requirements, and have good performance; coupled with its excellent corrosion resistance and chemical stability, porous graphite material is indeed a very suitable material for the preparation of cathode plates.

In addition, the use of porous graphite material as the cathode plate can also meet the fuel cell cathode plate standard established by DOE (US Department of Energy), which requires conductivity >100 (S·cm-1) and thermal conductivity >10 (W·m). -1·K-1), contact resistance <30 (mΩ·cm2).

In an embodiment of the invention, the selected porous graphite material has a thermal conductivity of not less than 100 W/m·K, a compressive strength of not less than 1.2 MPa, and a porosity of not less than 40%.

Fig. 3 is a comparison result of weights of cathode plates of the same specification formed by using different materials, wherein the data of the metal materials are calculated according to the thickness of 0.1 mm, and the graphite and the porous graphite materials are all calculated by the thickness of 1 mm. As can be seen from Fig. 3, the cathode plate made of the porous graphite material has a markedly reduced weight relative to the cathode plate made of a metal material. The weight of the porous graphite cathode plate of the same structure is less than 1/3 of that of the conventional non-porous graphite cathode plate. Comparative experiments by the inventors show that porous graphite is cloudy The weight of the plates can even be 1/7 of the weight of the existing non-porous graphite cathode plates.

It can be seen that the porous graphite material not only inherits the excellent chemical stability and corrosion resistance of graphite, but also maintains the electrical conductivity and mechanical strength of graphite. More importantly, because the porous graphite material has a uniformly distributed pore structure, the weight of the cathode plate is greatly reduced, and a power density exceeding 800 W/kg can be achieved on the air-cooled proton exchange membrane fuel cell stack; The evenly distributed pore structure also greatly increases the surface area of the cathode plate, so that the heat dissipation performance of the cathode plate is also improved. In addition, since the uniformly distributed pores in the porous graphite material can serve as the oxidant passage, the reduction reaction and thermal management of the cathode can be realized without additionally preparing the oxidant flow passage, and the oxidant can participate in the reaction anywhere in the cathode plate. The omnidirectional contact, the distribution is more uniform, the mass transfer resistance is lowered, and the battery performance is improved. At the same time, the preparation process of the cathode plate can be: a large porous graphite brick is produced, and then cut into a suitable size cathode as needed. The board is ready to further reduce mold manufacturing and machining difficulties, reducing equipment and manufacturing costs.

4 is a cross-sectional view, taken along line A-A of FIG. 2, of a cathode plate for a proton exchange membrane fuel cell according to an embodiment of the present invention. As shown in FIG. 4, the upper and lower end faces of the gasket 2 protrude from the cathode plate. Thus, when pressure is applied to the upper and lower end faces of the gasket 2, the pressure does not directly act on the cathode plate, thereby effectively preventing the cathode plate from being damaged due to excessive pressure. The pressure from the upper and lower end faces forms a deformation of the gasket 2, and thereby forms a seal for the fuel through hole 1, and fuel (for example, hydrogen) can be introduced/derived through the through hole 3 in the gasket 2 to introduce/export the proton exchange membrane fuel. Battery without leakage.

It will be understood by those skilled in the art that the number and position of the gaskets 2 may depend on the fuel through holes 1, and thus the present invention does not limit the number and position of the gaskets 2.

In an embodiment of the invention, as shown in FIG. 5, a rigid filler 4 is provided in the gasket 2. The rigid filler 4 may be made of metal, or may be a composite material, an engineering plastic, or other material that can satisfy the rigidity requirement. Thus, when the end surface of the gasket 2 is subjected to excessive pressure, the rigid filler 4 can provide a certain supporting effect, so that the pressure does not all act on the gasket 2 and the porous graphite cathode plate, thereby avoiding the porous graphite cathode plate being damaged. Excessive pressure and damage.

FIG. 6 is a schematic structural view of a cathode plate for a proton exchange membrane fuel cell according to an embodiment of the present invention. As shown in FIG. 6, in order to further promote the supply of oxidant (for example, oxygen in the air) and convective heat exchange, the oxidant flow path 5 may be further provided in the porous graphite material of the cathode plate. The oxidant flow path 5 may be composed of a plurality of grooves provided in the porous graphite material. The oxidant enters the grooves and then is introduced/exported through the pores in the porous material to the proton exchange membrane fuel cell. In an embodiment of the present invention, as shown in FIG. 6, the grooves may be rectangular grooves parallel to each other, but the specific shape of the grooves is not limited in the present invention.

FIG. 7 is a schematic structural view of a cathode plate for a proton exchange membrane fuel cell according to an embodiment of the present invention. As shown in Fig. 7, unlike the cathode plate provided in the embodiment of Fig. 6, the oxidant flow path 5 on the cathode plate is composed of a plurality of hollow holes provided in the porous graphite material. Thus, the oxidant can directly introduce/export the proton exchange membrane fuel cell through the hollow holes, thereby further improving the oxidant supply efficiency and the convective heat exchange efficiency. In an embodiment of the present invention, as shown in FIG. 7, the hollow holes may be rectangular hollow holes that are parallel to each other. The specific shape of the hollow holes is not limited in the present invention.

FIG. 8 is a schematic structural view of a proton exchange membrane fuel cell according to an embodiment of the present invention. As shown in FIG. 8, the proton exchange membrane fuel cell comprises:

The cathode plate 71 is made of a porous graphite material, and the oxidant is introduced into/out of the proton exchange membrane fuel cell through a hole in the porous graphite material; wherein the cathode plate 71 includes: two fuel through holes 1 respectively serving as a fuel inlet and a fuel outlet in which a gasket 2 having a through hole is provided in the two fuel through holes 1 for separating the fuel through hole 1 from a hole in the porous graphite material, and the fuel passes through the two gaskets 2 a through hole 3 is introduced/exported to the proton exchange membrane fuel cell;

The membrane electrode 72 is disposed under the cathode plate; wherein the membrane electrode is provided with a proton exchange membrane 721 and two membrane electrode through holes 722 communicating with the two fuel through holes 1;

a sealing ring 73 disposed under the membrane electrode 72 for sealing a space below the membrane electrode to prevent outside air from entering a space below the membrane electrode;

An anode plate 74 disposed under the sealing ring 73; wherein the anode plate 74 is provided with a fuel flow path 741; Both ends of the fuel flow path 741 are provided with two anode plate through holes respectively communicating with the two membrane electrode through holes 722 to form a fuel delivery passage for the fuel cell.

In an embodiment of the invention, the cathode plate 71 may employ a cathode plate provided by any of the embodiments of the present invention. For example, the cathode plate 71 may be provided with an oxidant flow path 5. The oxidant flow path 5 may be formed by rectangular grooves that are parallel to each other, or may be formed by rectangular hollow holes that are parallel to each other (as shown in Fig. 8). The specific structure of the cathode plate 71 employed in the proton exchange membrane fuel cell of the present invention is not limited.

The working principle of the proton exchange membrane fuel cell is that fuel is introduced through a fuel through hole 1 in the cathode plate 71, and is introduced into the fuel flow path 741 on the anode plate 74 through the membrane electrode through hole 722 on the membrane electrode 72. The fuel in the fuel flow path 741 reacts with an electrode to generate electrons and fuel ions (e.g., hydrogen protons). The oxidant (for example, oxygen in the air) directly enters the proton exchange membrane 721 through the porous structure of the cathode plate 71 and the oxidant flow path 5, and reacts with the electron and fuel ion generating electrodes passing through the proton exchange membrane 721 to release electric energy.

Since the cathode plate 71 is made of a porous graphite material, the proton exchange membrane fuel cell also has the advantages of light weight, and also has excellent chemical stability and corrosion resistance, good heat dissipation capability, and high work efficiency.

FIG. 9 is a schematic structural view of a proton exchange membrane fuel cell stack according to an embodiment of the present invention. As shown in Figure 9, the proton exchange membrane fuel cell stack comprises:

The upper end plate 81 includes two fuel ports 811 for respectively serving as a fuel inlet and a fuel outlet;

The upper current collecting plate 82 is disposed under the upper end plate 81; wherein the upper current collecting plate 82 is provided with an upper collecting plate through hole communicating with the two fuel ports 811;

a fuel cell stack 83 disposed under the upper current collecting plate 82 and stacked by at least one of the proton exchange membrane fuel cells provided in the above embodiments; wherein the two anode plate through holes of each fuel cell are respectively adjacent to the fuel Two fuel through holes of the cathode plate of the battery are connected to form a connected fuel delivery channel in the fuel cell stack, and the fuel delivery channel is further connected to the two fuel ports 811;

a lower current collecting plate 84 disposed under the fuel cell stack 83;

a lower end plate 85 disposed below the lower current collecting plate 84;

The fixing bolt 86 penetrates the upper end plate 81 and the lower end plate 85, and presses the upper current collecting plate 82, the fuel cell stack 83, and the lower current collecting plate 84 between the upper end plate 81 and the lower end plate 85.

It will be understood by those skilled in the art that the number and specific position of the fixing bolts 86 can be adjusted according to the degree of compaction to be achieved. The present invention does not limit the number and specific positions of the fixing bolts 86. In addition, the two fuel ports 811 serving as the fuel inlet and the fuel outlet, respectively, may also be on the lower end plate, or one of the upper end plate and the lower end plate, and correspondingly arranged with the current collecting plate through holes.

The manifold can also be used to seal fuel delivery passages of fuel cells that are not in communication with the fuel inlet and outlet. For example, in the case where both the fuel inlet and the fuel outlet are provided in the upper end plate as shown in FIG. 9, two gaskets may be provided on the lower header 84 at positions corresponding to the fuel delivery passages of the stack for sealing Two anode plate through holes of the lowermost one of the fuel cell stacks 83.

Since the cathode battery plate made of porous graphite material is used in the fuel cell stack 83 of the proton exchange membrane fuel cell stack, the proton exchange membrane fuel cell stack also has the advantages of light weight and excellent chemical stability. Sex and corrosion resistance, good heat dissipation and high work efficiency.

The above-mentioned embodiments are only intended to illustrate the technical concept and the features of the present invention, and are not intended to limit the present invention. Any modifications, equivalents, and the like made within the spirit and principles of the present invention should be included in the scope of the present invention. within.

Claims

A cathode plate for an air-cooled proton exchange membrane fuel cell, characterized in that it is made of a porous graphite material through which an oxidant is introduced/exported through the pores in the porous graphite material ;

Wherein the cathode plate includes two fuel through holes respectively serving as a fuel inlet and a fuel outlet, and a gasket having a through hole for providing the fuel through hole and the porous body in the fuel through hole The holes in the graphite material are separated; and,

Wherein, the fuel is introduced/derived through the through holes in the gasket to the proton exchange membrane fuel cell.
The cathode plate according to claim 1, wherein upper and lower end faces of said gasket protrude from said cathode plate.
The cathode plate according to claim 2, wherein the gasket is provided with a rigid filler.
The cathode plate according to claim 3, wherein the gasket is made of rubber, and the rigid filler is made of a metal material or a composite material or engineering plastic capable of satisfying rigidity requirements.
The cathode plate according to claim 1, further comprising: an oxidant flow path provided in the porous graphite material of said cathode plate.
The cathode plate according to claim 5, wherein the oxidant flow path is constituted by a plurality of grooves provided in the porous graphite material.
The cathode plate according to claim 5, wherein the oxidant flow path is composed of a plurality of hollow holes provided in the porous graphite material.
The cathode plate according to claim 1, wherein the porous graphite material has a thermal conductivity of not less than 100 W/m·K, a compressive strength of not less than 1.2 MPa, and a porosity of not less than 40%.
An air-cooled proton exchange membrane fuel cell, comprising:

a cathode plate according to any one of claims 1-8;

a membrane electrode disposed under the cathode plate, wherein the membrane electrode is provided with a proton exchange membrane and two membrane electrode through holes respectively communicating with the two fuel through holes;

a sealing ring disposed under the membrane electrode for sealing a space below the membrane electrode;

An anode plate disposed under the sealing ring; wherein the anode plate is provided with a fuel flow channel, and two ends of the fuel flow channel are provided with two anode plates respectively communicating with the two membrane electrode through holes A through hole forms a fuel delivery passage for the fuel cell.
An air-cooled proton exchange membrane fuel cell stack, comprising:

Upper end plate

An upper current collecting plate disposed under the upper end plate;

a fuel cell stack disposed under the upper current collecting plate and stacked by at least one proton exchange membrane fuel cell according to claim 9; wherein two anode plate through holes of each fuel cell are adjacent to each other The two fuel through holes of the cathode plate of the fuel cell are connected;

a lower current collecting plate disposed under the fuel cell stack;

a lower end plate disposed below the lower collector plate;

a fixing bolt penetrating the upper end plate and the lower end plate to press the upper current collecting plate, the fuel cell stack and the lower current collecting plate between the upper end plate and the lower end plate;

Wherein the fuel inlet and the fuel outlet are disposed in either one of the upper end plate and the lower end plate, or are respectively disposed; the positions of the fuel inlet and the fuel outlet correspond to the fuel through holes in the fuel cell stack And providing a collector plate through hole respectively communicating with the fuel inlet and the fuel outlet on either or both of the upper header and the lower header, such that the fuel inlet and the fuel outlet are disposed at The fuel through holes in the fuel cell stack are in communication.