TW200525802A - Polar plate and fuel cell - Google Patents

Abstract

A polar plate has a gas inlet and a gas outlet. The polar plate has two surfaces and at least one of these surfaces has a plurality of gas flow fields. These gas flow fields are column flow fields, serpentine flow fields, interdigitated flow fields or assembling thereof and connect with the gas inlet and the gas outlet. In addition, a fuel cell comprised two polar plates mentioned above and a membrane electrode assembly is provided. The membrane electrode assembly is disposed between these polar plates. By disposing these gas flow fields on the polar plates, the operating performance and effective power of the fuel cell can be enhanced.

Description

200525802

V. Description of the invention (1) The technology to which the invention belongs The present invention relates to a fuel cell of an electrode plate (Fue 丨 cei electrode plate with multiple sets of gas flow channels and a cell 0 (Polar Plate) and the use thereof 1) 'In particular, there is a fuel-electric technology using its electrode plate. With the advancement of the industry, the consumption of traditional gas continues to increase, so new alternative energy sources must be developed in order to be an important and practical value. Fuel cells have many advantages such as low energy. Energy sources such as coal, petroleum and natural resources are limited. Due to the replacement of traditional energy sources, the choice of fuel cells has high efficiency, clean exhaust and simple noise. A power generation device that converts hydrogen and oxygen through an electrochemical reaction to generate electricity is basically a reverse reaction of water electrolysis to convert its chemical energy into electricity. Take a Proton Exchange Membrane Fuel Cell (PEMFC for short) as an example, which is mainly composed of a Membrane Electrode Assembly (MEA) and two electrode plates. The thin-film electrode group is mainly composed of a proton exchange membrane, two catalyst layers, and two gas diffusion layers. The catalyst layers are respectively disposed on both sides of the proton exchange membrane, and the gas diffusion layers are respectively disposed on the outside of the catalyst layer. Two electrode plates are arranged on both sides of the thin-film electrode group. The surface of the electrode plate usually has a gas flow channel to convey the gases used for the reaction (such as hydrogen and oxygen). The gas flow channel can lead the gas to the thin film electricity.

200525802 V. Description of the invention (2) After the surface layer of the polar group is passed through the gas diffusion layer and the catalyst layer, an electrochemical reaction occurs at the membrane to generate electrons and exchange electrons after the reaction (such as water and heat energy). Among them, the electrons are connected by the bridge path ^ = the current used, and other products are discharged from the battery by the relevant mechanism. The part is the design of the gas flow channel on the plate. Figures 1A to 1 (: The top schematic diagrams of three gas flow channels arranged on the board. G. The gas flow channels designed on the surface of H 3 are common grid-shaped flow channels. 5

Flow Field (CFF for short), SerpentineUmn Flow Field (SFF for short) and Bifurcated Flow Channel (Inter

Field (referred to as IFF) three types. First, please refer to Figure 8 for reference. The gas flow channel on the electrode plate 100 is a grid flow channel 1 1 0, and the grid flow channel 1 1 0 is a single grid-like flow channel design, and communicates with the gas inlet 102 and gas outlet 104 on the electrode plate 100. The disadvantage of this design is that the fuel (ie, the reaction gas) cannot be effectively used in the thin-film electrode group ( The entire area of MEA) can easily cause the battery performance to decrease. Next, please refer to FIG. 1B. The gas flow channel on the electrode plate is a serpentine flow channel 120 ′, and the serpentine flow channel 120 is a single serpentine flow channel design. The gas inlet 102 and the gas outlet 104 on the plate 1000 are connected, and the disadvantage of this design is that the flow path is too long, which makes the concentration distribution of the gas fuel uneven, and it is easy to cause the battery efficiency to decrease. Finally, referring to FIG. 1C, the gas flow path on the electrode plate 1000 is a branched flow path 130, and the branched flow path 130 is a single branched type.

12650TWF.PTD Page 6 200525802 V. Description of the invention (3) The design of the flow channel communicates with the gas inlet 102 and gas outlet 104 on the electrode plate 100, and this design has the disadvantage of poor drainage and is easy to cause Battery performance has decreased. Therefore, it can be known from the above that the conventional gas flow channel, whether it is a grid flow channel, a serpentine flow channel, or a branch flow channel, is designed on the electrode plate with a single group of gas flow channels, each of which has a fuel efficiency that is not effective Disadvantages such as the entire area of the thin-film electrode group (that is, the use efficiency of the reaction gas decreases), the uneven distribution of the concentration of the gas fuel, or the poor drainage. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an electrode plate. By designing a plurality of sets of grid-like flow passages, meandering flow passages, bifurcated flow passages, or these combined gas flow passages, The utility model can effectively use the fuel to the entire area of the thin-film electrode group, make the concentration of the gaseous fuel uniform, and has excellent drainage effects. Another object of the present invention is to provide a fuel cell by designing a plurality of sets of grid-like flow passages, meandering flow passages, bifurcated flow passages or a combination of gas flow passages on an electrode plate in the fuel cell. It can improve the operating performance of the fuel cell to increase the operating power of the fuel cell. Based on the above objective, the present invention provides an electrode plate having a gas inlet and a gas outlet, and the electrode plate has two corresponding surfaces, at least one of which has a plurality of gas flow channels, and these gas flow channels It is selected from the group consisting of grid flow passage, snake flow passage and branch flow passage. These gas flow passages are connected with gas inlet and gas outlet.

12650TWF.PTD Page 7 200525802 V. Description of the invention (4) Based on the above purpose, the present invention further proposes a fuel cell, which is mainly composed of two electrode plates and a thin film electrode group. Each electrode plate has a gas inlet and a gas outlet, and each electrode plate has a surface on which there are a plurality of gas flow channels, and these gas flow channels are selected from grid-type flow channels, A group of serpentine flow channels and bifurcated flow channels. These gas flow channels are connected to a gas inlet and a gas outlet. The thin-film electrode group is disposed between two electrode plates, and the thin-film electrode group is connected to a surface of an electrode plate having these gas flow channels. Based on the above objectives, the present invention provides another fuel cell, which is mainly composed of a plurality of electrode plates and a plurality of thin-film electrode groups. Each electrode plate has a gas inlet and a gas outlet, and each electrode plate has two corresponding surfaces, each of which has a plurality of gas flow channels, and these gas flow channels are selected from a grid-like shape. The gas flow channels are connected to the gas inlet and the gas outlet of the electrode plate. A plurality of thin-film electrode groups are arranged alternately with the electrode plates, and the thin-film electrode groups are connected to the surfaces of the electrode plates. In a preferred embodiment of the present invention, when these gas flow channels are provided on one or both surfaces of the electrode plate, a common gas input flow channel is further provided on one or both surfaces of the electrode plate, and the common gas The input flow channel is connected between these gas flow channels and the gas inlet. In a preferred embodiment of the present invention, when there are these gas flow channels on one or both surfaces of the electrode plate, there are more gas input flow channels on one or both surfaces of the electrode plate, and each gas Input stream

12650TWF.PTD Page 8 200525802 V. Description of the invention (5) The channel system is correspondingly connected between a gas flow channel and a gas inlet. In addition, one of these gas input channels may be connected between a part of the gas channel and the gas inlet. In a preferred embodiment of the present invention, when one or both surfaces of the electrode plate have these gas flow channels, a common gas output flow channel is further provided on one or both surfaces of the electrode plate, and the common gas The output flow channel is connected between these gas flow channels and the gas inlet. In a preferred embodiment of the present invention, when one or both surfaces of the electrode plate have these gas flow channels, there are a plurality of gas output channels on one or both surfaces of the electrode plate, and each gas The output flow channel is correspondingly connected between a gas flow channel and a gas inlet. In addition, one of these gas output channels may be connected between a part of the gas channel and the gas inlet. In a preferred embodiment of the present invention, the material of the electrode plate is, for example, a conductive fiber, and the conductive fiber is, for example, a carbon fiber or a graphite fiber. In a preferred embodiment of the present invention, the thin-film electrode group is composed of a proton exchange membrane, two catalyst layers, and two gas diffusion layers. The two catalyst layers are respectively disposed on both sides of the proton exchange membrane, and the two gas diffusion layers are respectively disposed between the catalyst layer and the surface of the electrode plate having the plurality of gas flow channels. Since the fuel cell of the present invention is provided with a plurality of groups of gas flow channels, such as a plurality of sets of grid flow channels, meander flow channels, branch flow channels, or a combination thereof, on one or both surfaces of the electrode plate, the fuel Can effectively use the entire area of the thin-film electrode group and can distribute the concentration of gaseous fuel

12650TWF.PTD Page 9 200525802 V. Description of the invention (6) Uniformity to improve the utilization rate of the reaction gas, and also < the drainage can be improved by the possibility of accumulating in the interior of the flow channel, and then the power is improved. The operating performance of the fuel cell is based on the operating power of the fuel cell to make the above and other objects, features, and advantages of the present invention obvious. The following provides a preferred embodiment and the accompanying drawings. The detailed description is as follows. : Embodiments 2A ~ 2C show a top view of an electrode plate having multiple sets of cross-type gas flow channels according to a preferred embodiment of the present invention. First, please refer to FIG. 2A first. The electrode plate 2000 has a gas inlet 212 and a gas outlet 214. The gas inlet 212 and the gas outlet 214 are, for example, located at two opposite corners of the electrode plate 200, and the gas inlet 212 and the gas outlet 2 1 4 are, for example, Is through the electrode plate 2000. In addition, the electrode plate 2000 has a surface 216, and the surface 216 has a plurality of branched gas flow channels 2 2 0 (only two are shown in this figure), and these points Fork gas flow channel 220 It is connected to the gas inlet 212 and the gas outlet 214. In addition, the material of the electrode plate 2000 is, for example, conductive fiber, and the conductive fiber is, for example, carbon fiber or graphite fiber. In this embodiment, the surface of the electrode plate 2000 There is a common gas input flow channel 222 on 2 1 6, and the common gas input flow channel 222 communicates with the two branched gas flow channels 2 2 0 and is connected to the two branched gas flow channels 2 2 0 And the gas inlet 212. A common gas input flow channel 222 is thereby used to transfer a reaction gas (such as hydrogen or oxygen) from the gas inlet 2 1 2 to the two branched gas flow channels 2 2 0. In addition, In this embodiment, a common gas output channel is further provided on the surface 216 of the electrode plate 200.

12650TWF.PTD Page 10 200525802 V. Description of the invention (7) 2 24, and this common gas output flow channel 2 2 4 communicates with the two branched gas flow channels 2 2 0 and is connected to the two branched gas Between the flow channel 2 2 0 and the gas outlet 2 1 4. The common gas output flow channel 2 2 4 is used to transfer a reaction gas (such as hydrogen or oxygen) from the two branched gas flow channels 220 to the gas outlet 2 1 4. Please refer to FIG. 2B, wherein the structure of the electrode plate 200 is substantially the same as the embodiment disclosed in the above FIG. 2A. The same points are not repeated here, and the difference is that the surface 216 of the electrode plate 200 has four The cross-type gas flow channel 2 2 0, and the surface 2 16 of the electrode plate 2 0 has a plurality of gas input flow channels 2 2 6 (four are shown here), and the gas input flow channels 226 are separated by one. The one-to-one manner communicates with the branched gas flow channels 220 and is connected between the branched gas flow channels 220 and the gas inlet 212. These gases are input to the flow channels 2 2 6 to transfer a reaction gas (such as hydrogen or oxygen) from the gas inlet 212 to the branched gas flow channels 220. In addition, in this embodiment, there are a plurality of gas output channels 2 2 8 (four are shown here) on the surface 2 1 6 of the electrode plate 2000, and the gas output channels 228 are arranged one-to-one. It is in communication with the branched gas flow channels 220 and is connected between the branched gas flow channels 220 and the gas outlet 214. These gas input channels 2 2 8 are used to transfer a reaction gas (such as hydrogen or oxygen) from these branched gas flow channels 220 to the gas outlet 2 1 4. Please refer to FIG. 2C. The structure of the electrode plate 200 is substantially the same as the embodiment disclosed in the above FIG. 2B. The same points are not repeated here, and the difference lies in the design on the surface 216 of the electrode plate 200. Majority

12650TWF.PTD Page 11 200525802 V. Description of the invention (8) Volume input channels 226 (two are shown here), of which each-gas input channel 2 2 6 series and part cross type gas channel 2 20 ( No two are drawn here). In addition, there are a plurality of gas output channels 228 (two shown here) designed on the surface 21 6 of the electrode plate 2 0, each of which is a gas output channel 2 The 8 series is in communication with some cross-type gas flow channels 220 (two are shown here). Therefore, it can be seen from the above that the electrode plate can be provided with multiple groups of cross-type gas flow channels on one surface, and the cross-type gas The flow channel may be connected to the gas input port through one or more gas input flow channels, and when there are a plurality of gas input flow channels, j may be an independent flow channel or a partially connected flow channel. Similarly, the cross-type gas flow path can be connected to the gas output port through one or more gas output flow paths, and the gas output flow path can also be independent flow paths or partially connected flow paths. It is worth noting that the multiple gas flow channels designed on the surface of the above electrode plate are illustrated by cross-type gas flow channels. However, those skilled in the art should know that the present invention is not limited to Figures 2A and 2C disclose cross-type gas flow channels, and other types of gas flow channels are also disclosed and will be disclosed below. FIG. 3 is a schematic top view of an electrode plate with multiple sets of meandering gas flow channels according to another preferred embodiment of the present invention. Please refer to FIG. 3. In this embodiment, a plurality of meandering gas flow channels 230 (four are shown here) are arranged on one surface 216 of the electrode plate 200. As mentioned above, these meandering gas flow channels 2 3 0 One or more gas inlet channels 226 can be communicated with the gas inlet 212, and the meandering gas channels 2 30 and the gas outlet

12650TWF.PTD Page 12 200525802 V. Description of the invention (9) One or more gas output channels 2 2 8 can be connected between 2 1 4. FIG. 4 is a schematic top view of an electrode plate having a plurality of grid gas flow channels according to another preferred embodiment of the present invention. Please refer to FIG. 4. In this embodiment, a plurality of grid-like gas flow channels 2 4 0 (two are shown here) are arranged on one surface 210 of the electrode plate 200. As described above, these grid-like gas channels One or more gas input channels 2 2 6 can be communicated between the flow channel 2 4 0 and the gas inlet 2 1 2, and one or more can be communicated between the grid gas flow channels 2 3 0 and the gas outlet 2 1 4 2 gas output channels 2 2 8. Carrying on the above, the above-mentioned electrode plates selected from a plurality of groups selected from the grid flow passage, the serpentine flow passage, and the branch flow passage are applied to a polymer thin film fuel cell (PEMFC) for illustration. Detailed description in the article. FIG. 5 is a schematic structural diagram of a fuel cell according to a preferred embodiment of the present invention. Referring to FIG. 5, the fuel cell 3000 is mainly composed of two electrode plates 2000 and a thin-film electrode group 3 丨 disclosed above. The thin-film electrode group 310 is composed of a proton exchange membrane 312, two catalyst layers 314, and two gas diffusion layers 316. The two catalyst layers 314 are respectively disposed on both sides of the proton exchange membrane 3 1 2, and the two gas diffusion layers 3 丨 6 are respectively disposed between the catalyst layer 3 1 4 and the two electrode plates 2000, and the gas The diffusion layer 3 丄 6 is configured with the above-mentioned multi-component fork type (snake type, grid type).

The surfaces 216 of the lanes 220 (230, 240) are connected. L Please continue to refer to FIG. 5 and cooperate with FIG. 2A to FIG. 4 in a timely manner. Because one surface 2 1 6 of the electrode plate 2 0 6 of the present invention is changed to a multi-component bifurcated gas flow channel 2 2 0, multiple groups Snake-shaped gas flow channel 2 3 0 or multiple sets of grid-shaped gas flow channels 2 4 0, these branched (snake-type, grid-shaped) gas flow channels 22〇

200525802 V. Description of the invention (ίο) (2 3 0, 2 4 0) It will be easier to direct the fuel (ie, the reaction gas) to the surface layer of the thin-film electrode group 3 10, and then pass through the gas diffusion layer 316 and the catalyst layer 314 The required current is generated at the proton exchange membrane 3 1 2, so the fuel (ie, the reaction gas) can be used more effectively to the entire area of the thin-film electrode group 3 1 0. In addition, in comparison, the path of each group of gas flow paths is shorter than the path known as a single gas flow path, so that the concentration distribution of the gas fuel can be more uniform, and the utilization rate of the reaction gas can be improved. It can also reduce the possibility of moisture accumulating inside the flow channel, and make the drainage excellent. Therefore, it can be known from the above that the fuel cell of the present invention adopts an electrode plate having a plurality of groups selected from a grid flow passage, a meander flow passage, a branch flow passage (or a combination of the above flow passages), which can improve Operational performance of fuel cells and increase the operating power of fuel cells. The fuel cell in the above embodiment has a plurality of gas flow channels selected from a grid-shaped flow channel, a meandering flow channel, a branching flow channel (or a combination of the above flow channels) formed on one surface of the electrode plate. To improve the operating performance of fuel cells and increase the operating power of fuel cells. However, those skilled in the art should know that the electrode plate in the fuel cell of the present invention is not limited to forming multiple sets of gas flow channels on only one surface, and the above-mentioned multiple groups may be arranged on both surfaces of the electrode plate. Gas runner. FIG. 6 is a schematic structural diagram of a fuel cell according to another preferred embodiment of the present invention. The structure of the fuel cell 300 in this embodiment is substantially the same as that of the fuel cell 300 disclosed in FIG. 5 above, and the same points are not repeated, and the difference is that the fuel cell 3 0 0 'is composed of a large number of The above-disclosed thin-film electrode group 3 1 0 and a plurality of the above-disclosed electrode plates 2 0 0 are formed by stacking each other, and

12650TWF.PTD Page 14 200525802 V. Description of the invention (11) The two surfaces 216 and 218 of the electrode plate 200 implemented are provided with most of the components of the bifurcated (snake and grid) flow channels disclosed above 2 20 (2 3 0, 2 4 0), in short, most component bifurcated (snake, grid) flow channels designed by the present invention 2 2 0 (2 3 0, 2 4 0) gas flow channels It can also be used on a bipolar plate. In summary, the fuel cell of the present invention forms a multi-component bifurcated flow passage, a meandering flow passage, a grid flow passage, or a combination of gas flow passages on one or both surfaces of the electrode plate. The fuel can be effectively used to the entire area of the thin-film electrode group, and the concentration of the gaseous fuel can be evenly distributed to improve the utilization rate of the reaction gas. On the other hand, it can also reduce the possibility of moisture accumulation inside the flow channel and make the drainage excellent The operating performance of the fuel cell is further improved to increase the operating power of the fuel cell. Although the present invention has been disclosed as above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes and retouch without departing from the spirit and scope of the present invention. The scope of protection of the invention shall be determined by the scope of the attached patent application.

12650TWF.PTD Page 15 200525802 Brief Description of Drawings Figures 1A to 1C are schematic top views of three gas flow channels arranged on a conventional electrode plate. Figures 2A to 2C show schematic top views of an electrode plate having multiple sets of crossed gas flow channels according to a preferred embodiment of the present invention. FIG. 3 is a schematic top view of an electrode plate having multiple groups of meandering gas flow channels according to another preferred embodiment of the present invention. FIG. 4 is a schematic top view of an electrode plate having a plurality of grid gas flow channels according to another preferred embodiment of the present invention. FIG. 5 is a schematic structural diagram of a fuel cell according to a preferred embodiment of the present invention. FIG. 6 is a schematic structural diagram of a fuel cell according to another preferred embodiment of the present invention. [The legend does not indicate] 100 electrode plate 102 gas inlet 104 gas outlet V 110 grid flow channel 120 serpentine flow channel 130 bifurcated flow channel 200 electrode plate 212 gas inlet Π 214 gas outlet 2 16 surface 218 surface

12650TWF.PTD Page 16 200525802

Brief description of the drawing: 220 bifurcated flow path 222, common gas input flow path 224, common gas output flow path 226, gas input flow path 228, gas output flow path 3 0 0, > 3 0 0 ′: fuel cell 310 membrane electrode group 312 Proton exchange membrane 314 Catalyst layer 316 Gas diffusion layer 12650TWF.PTD Page 17

Claims (1)

200525802 VI. Scope of patent application 1. An electrode plate having a gas inlet and a gas outlet, and the electrode plate has two corresponding surfaces, at least one of which has a plurality of gas flow channels, and these The gas flow channels are selected from the group consisting of grid flow channels, serpentine flow channels, and bifurcated flow channels, and the gas flow channels are connected to the gas inlet and the gas outlet. 2. The electrode plate according to item 1 of the scope of patent application, wherein at least one of the surfaces further has a common gas input flow path, and the common gas input flow path is connected to the gas flow paths and the Gas inlet. 3. The electrode plate according to item 1 of the scope of patent application, wherein at least one of the surfaces further has a plurality of gas input channels, and each of the gas input channels is connected to the gas flows respectively. Between one of the lanes and the gas inlet. 4. The electrode plate according to item 1 of the scope of patent application, wherein at least one of the surfaces further has a plurality of gas input channels, and one of the gas input channels is respectively connected to a part of the gases. Between the runner and the gas inlet. 5. The electrode plate according to item 1 of the scope of patent application, wherein at least one of the surfaces further has a common gas output flow channel, and the common gas output flow channel is connected to the gas flow channels and the Gas inlet. 6. The electrode plate according to item 1 of the scope of patent application, wherein at least one of the surfaces further has a plurality of gas output channels, and each of the gas output channels is respectively connected to the gas flows. One of the ways 12650TWF.PTD Page 18 200525802 6. The scope of patent application and the gas inlet. 7. The electrode plate according to item 1 of the scope of patent application, wherein at least one of the surfaces further has a plurality of gas output channels, and one of the gas output channels is respectively connected to a part of the gases. Between the runner and the gas inlet. 8. The electrode plate according to item 1 of the scope of patent application, wherein the material of the electrode plate is conductive fiber. 9. The electrode plate according to item 8 of the scope of patent application, wherein the conductive fiber is one of carbon fiber and graphite fiber. 1 0. A fuel cell comprising: two electrode plates, each of which has a gas inlet and a gas outlet, and each of the electrode plates has a surface with a plurality of gas flow channels, The gas flow channels are selected from the group consisting of grid flow channels, serpentine flow channels, and bifurcated flow channels, and the gas flow channels are connected to the gas inlet and the gas outlet; and A thin film electrode group is disposed between the electrode plates, and the thin film electrode group is connected to the surface of each of the electrode plates. 11. The fuel cell according to item 10 of the scope of patent application, wherein the surface further has a common gas input channel, and the common gas input channel is connected to the gas channels and the gas inlet. between. 12. The fuel cell according to item 10 of the scope of patent application, wherein the surface further has a plurality of gas input channels, and each of the gas input channels is connected to each of the gas channels separately. And between the gas inlet. 12650TWF.PTD Page 19 200525802 VI. Application for patent scope 1 3. The fuel cell according to item 10 of the patent application scope, wherein the surface has a plurality of gas input channels, and among these gas input channels A series is connected between some of the gas flow channels and the gas inlet. 14. The fuel cell according to item 10 of the scope of the patent application, wherein the surface further has a common gas output channel, and the common gas output channel is connected to the gas channels and the gas inlet. between. 15. The fuel cell according to item 10 of the scope of patent application, wherein the surface further has a plurality of gas output channels, and each of the gas output channels is respectively connected to one of the gas channels. And between the gas inlet. 16. The fuel cell according to item 10 of the scope of patent application, wherein at least one of the surfaces further has a plurality of gas output channels, and one of the gas output channels is respectively connected to a part of the Between the gas flow channels and the gas inlet. 1 7. The fuel cell according to item 1 (1) of the scope of patent application, wherein the thin-film electrode group includes: a proton exchange membrane; two catalyst layers respectively disposed on both sides of the proton exchange membrane; and two gas diffusion layers Respectively disposed between one of the catalyst layers and one of the electrode plates. 1 8. The fuel cell according to item 10 of the scope of patent application, wherein the material of the electrode plates is conductive fiber. 19. The fuel cell according to item 18 of the scope of patent application, wherein 12650TWF.PTD Page 20 200525802 6. Scope of patent application Conductive fiber is one of carbon fiber and graphite fiber. 2 0. A fuel cell comprising: a plurality of electrode plates, each of which has a gas inlet and a gas outlet, and each of the electrode plates has two corresponding surfaces, each of which has A plurality of gas flow channels, and the gas flow channels are selected from the group consisting of a grid flow channel, a snake flow channel, and a branch flow channel, and the gas flow channels are connected with each of the electrodes The gas inlet and the gas outlet of the plate are connected; and a plurality of thin film electrode groups, the thin film electrode groups are staggered with the electrode plates, and the thin film electrode groups are connected to the surfaces of the electrode plates. 2 1. The fuel cell according to item 20 of the scope of patent application, wherein each of these surfaces further has a common gas input flow channel, and the common gas input flow channel is connected to each of the surfaces. Between the gas flow channels and the gas inlet. 2 2. The fuel cell according to item 20 of the scope of the patent application, wherein each of the surfaces further has a plurality of gas input channels, and each of the gas input channels is connected to each of these Between one of the gas flow channels on the surface and the gas inlet. 2 3. The fuel cell according to item 20 of the scope of patent application, wherein each of these surfaces further has a plurality of gas input channels, and one of the gas input channels is connected to each of these A portion of the surface between the gas flow channels and the gas inlet. 2 4. The fuel cell as described in item 20 of the scope of patent application, wherein each 12650TWF.PTD Page 21 200525802 VI. Scope of patent application-There is a common gas output channel on the surfaces, and the common gas output channel is connected to the gas channels and the surfaces on each of the surfaces. Gas inlet. 25. The fuel cell according to item 20 of the scope of the patent application, wherein each of the surfaces further has a plurality of gas output channels, and each of the gas output channels is connected to each of these Between one of the gas flow channels on the surface and the gas inlet. 26. The fuel cell according to item 20 of the scope of the patent application, wherein each of these surfaces further has a plurality of gas output channels, and one of the gas output channels is connected to each of these A portion of the surface between the gas flow channels and the gas inlet. 27. The fuel cell according to item 20 of the scope of patent application, wherein each of the thin film electrode groups includes: a proton exchange membrane; two catalyst layers respectively disposed on both sides of the proton exchange membrane; and The gas diffusion layers are respectively disposed between one of the catalyst layers and one of the electrode plates. 2 8. The fuel cell according to item 20 of the scope of patent application, wherein the material of the electrode plates is conductive fiber. 29. The fuel cell according to item 28 of the scope of patent application, wherein the conductive fiber is one of carbon fiber and graphite fiber. 12650TWF.PTD Page 22