CN111509258B - Membrane electrode assembly, method for assembling membrane electrode assembly, and fuel cell module - Google Patents
Membrane electrode assembly, method for assembling membrane electrode assembly, and fuel cell module Download PDFInfo
- Publication number
- CN111509258B CN111509258B CN201910100392.1A CN201910100392A CN111509258B CN 111509258 B CN111509258 B CN 111509258B CN 201910100392 A CN201910100392 A CN 201910100392A CN 111509258 B CN111509258 B CN 111509258B
- Authority
- CN
- China
- Prior art keywords
- catalyst layer
- layer
- edge protection
- electrode assembly
- membrane electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1004—Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0276—Sealing means characterised by their form
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a membrane electrode assembly, a membrane electrode assembly assembling method and a fuel cell module. The membrane electrode assembly includes: the edge protection device comprises an electrolyte membrane, a first catalyst layer arranged on one side of the electrolyte membrane, a second catalyst layer arranged on the other side of the electrolyte membrane and an edge protection element, wherein at least one end face of the second catalyst layer is spaced from the corresponding edge protection element, and a gap compensation piece is arranged at the position of the space between the end face of the second catalyst layer and the edge protection element. According to the membrane electrode assembly, the gap compensation piece is arranged between the second catalyst layer and the edge protection element, so that the gap between the second catalyst layer and the edge protection element can be filled, the safety of the electrolyte membrane in the production process is ensured, the first catalyst layer and the second catalyst layer are prevented from extruding the electrolyte membrane when the membrane electrode assembly is packaged, the electrolyte membrane is prevented from being damaged or punctured, and the assembly yield of the membrane electrode assembly is ensured to be high.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a membrane electrode assembly, an assembly method of the membrane electrode assembly and a fuel cell module.
Background
The membrane electrode assembly consists of two electrode catalyst layers with different polarities and an electrolyte membrane, specifically, hydrogen gas generates catalytic reaction near an anode catalyst layer to generate hydrogen ions and electrons, the hydrogen ions are transmitted to a cathode through a proton exchange membrane, and the electrons are transmitted to the cathode from an external circuit; the oxygen gas is catalyzed near the cathode catalyst layer and is combined with electrons from an external circuit to generate oxygen ions, and then the oxygen ions are combined with hydrogen ions to generate water.
The electrolyte membrane is very thin compared to the other components of the membrane electrode assembly and is therefore very easily pierced. For this reason, an edge protection member is added to the cell catalyst layer to protect the electrolyte membrane and to increase the manufacturing tolerance between the electrolyte membrane and the electrode catalyst layer to reduce the difficulty of fitting. The edge protection elements are typically made of a polymer material that is resistant to the fuel cell electrochemical reaction and does not interact with other materials in the stack.
However, the interfaces between the anode catalyst layer, the cathode catalyst layer and the edge protection element are often found to be not perfectly aligned during high volume manufacturing processes when the membrane electrode assembly is packaged. In particular, it is generally found that there is a certain gap between the anode catalyst layer, the cathode catalyst layer, and the base film layer of the edge protection element, which makes the electrolyte membrane very vulnerable to damage or puncture, resulting in the failure of the membrane electrode assembly to function properly.
Disclosure of Invention
In view of the above, the present invention is directed to a membrane electrode assembly to solve the problem that an electrolyte membrane is easily broken or punctured.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the membrane electrode assembly of the present invention comprises: the edge protection element is arranged at two ends of the electrolyte membrane and is in contact with the corresponding edge protection element, at least one end face of the first catalyst layer and/or the second catalyst layer is provided with a gap between the edge protection elements, and a gap compensation piece is arranged at the gap.
According to some embodiments of the invention, the edge protection element comprises: the edge protection element comprises a base film layer and a bonding layer, wherein the base film layer is arranged on two sides of the end part of the electrolyte film, the bonding layer is arranged between the base film layer and the electrolyte film, and the end faces of two ends of the first gas diffusion layer and the second gas diffusion layer are in contact with the corresponding base film layers of the edge protection element.
According to some embodiments of the present invention, the first catalyst layer has a length greater than that of the second catalyst layer, both end faces of the first catalyst layer are in contact with the corresponding base film layers of the edge protection elements, and the gap compensator is disposed between the second catalyst layer and the corresponding base film layers of the edge protection elements.
According to some embodiments of the invention, the clearance compensation member is a viscous seal.
Specifically, a support frame is provided on a side of each of the base film layers remote from the electrolyte membrane.
Specifically, the edge protection element further includes:
further, a first polar plate is arranged on one side of the first gas diffusion layer, which is far away from the first catalyst layer, and a first gas flow channel is formed between the first polar plate and the first gas diffusion layer; and a second polar plate is arranged on one side of the second gas diffusion layer, which is far away from the second catalyst layer, and a second gas flow channel is formed between the second polar plate and the second gas diffusion layer.
According to some embodiments of the invention, the first catalyst layer is an anode catalyst layer and the second catalyst layer is a cathode catalyst layer; or, the first catalyst layer is a cathode catalyst layer, and the second catalyst layer is an anode catalyst layer.
Compared with the prior art, the membrane electrode assembly has the following advantages:
the gap compensation piece is arranged between the second catalyst layer and the edge protection element, so that the gap between the second catalyst layer and the edge protection element can be filled, the safety of the electrolyte membrane in the production process can be ensured, the first catalyst layer and the second catalyst layer are prevented from extruding the electrolyte membrane when the membrane electrode assembly is packaged, the electrolyte membrane is damaged or punctured, and the high yield of the assembly of the membrane electrode assembly can be ensured.
Another object of the present invention is to provide a membrane electrode assembly assembling method, which can be used for assembling the membrane electrode assembly described above, the assembling method comprising:
coating a first catalyst layer on one side of an electrolyte membrane and a second catalyst layer on the other side of the electrolyte membrane;
arranging edge protection elements at two ends of the electrolyte membrane, enabling end faces at two ends of the first catalyst layer to be in contact with the corresponding edge protection elements, and enabling at least one end face of the second catalyst layer to be spaced from the corresponding edge protection elements;
placing a first gas diffusion layer on one side of the first catalyst layer far away from the electrolyte membrane, and enabling end faces of two ends of the first gas diffusion layer to be in contact with the corresponding edge protection elements;
providing a gap compensator at a spacing between an end face of the second catalyst layer and the edge protection element;
and placing a second gas diffusion layer on one side of the second catalyst layer far away from the electrolyte membrane, and enabling the end faces of two ends of the second gas diffusion layer to be in contact with the corresponding edge protection elements.
Compared with the prior art, the assembly method of the membrane electrode assembly has the following advantages:
according to the assembly method of the membrane electrode assembly, the membrane electrode assembly assembled by the method is stable in structure, the safety of the electrolyte membrane is high, and the high assembly yield of the membrane electrode assembly can be guaranteed.
A third objective of the present invention is to provide a fuel cell module including the membrane electrode assembly.
According to some embodiments of the invention, the membrane electrode assemblies are plural, and a cooling channel is provided between adjacent two of the membrane electrode assemblies.
Compared with the prior art, the fuel cell module has the following advantages:
according to the fuel cell module, the membrane electrode assembly in the fuel cell module further improves the manufacturing tolerance, the porous catalyst layer can be prevented from inducing gas crossing, and the membrane electrode assembly is effectively prevented from short-circuiting. The gap compensator is a viscous seal, which can reduce the difficulty of assembling the membrane electrode assembly. And a cooling channel is arranged between the adjacent membrane electrode assemblies, so that the phenomenon that the membrane electrode assemblies are burnt out due to overlarge heat generated by catalysis between the membrane electrode assemblies can be prevented, and the high working reliability of the fuel cell module is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of the left half of a membrane electrode assembly according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic view of the assembly of the electrolyte membrane, the first catalyst layer, the second catalyst layer, and the edge protection element;
FIG. 4 is a schematic view of a fuel cell module;
figure 5 is a flow chart of a method of assembling a membrane electrode assembly.
Description of reference numerals:
the membrane electrode assembly 10, the electrolyte membrane 100, the first catalyst layer 131, the second catalyst layer 130, the edge protection element 15, the first edge protection element 151, the second edge protection element 152, the base film layer 11, the first base film layer 112, the second base film layer 113, the bonding layer 12, the first bonding layer 110, the second bonding layer 111, the support frame 13, the first support frame 115, the second support frame 114, the gap compensator 14, the first gap compensator 120, the second gap compensator 121, the first gas diffusion layer 123, the second gas diffusion layer 122, the first electrode plate 140, the first gas flow channel 142, the second electrode plate 141, the second gas flow channel 144, the fuel cell module 20, and the cooling channel 143.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail with reference to fig. 1 to 5 in conjunction with examples.
Referring to fig. 1 to 4, a membrane electrode assembly 10 according to an embodiment of the present invention may include: an electrolyte membrane 100, a first catalyst layer 131 disposed on one side of the electrolyte membrane 100, a second catalyst layer 130 disposed on the other side of the electrolyte membrane 100, and an edge protection element 15, in other words, the electrolyte membrane 100 is disposed between the first catalyst layer 131 and the second catalyst layer 130, and the electrolyte membrane 100 has proton transport and exchange capabilities, the first catalyst layer 131 and the second catalyst layer 130 being catalyst layers of different polarities, for example, when the first catalyst layer 131 is an anode catalyst layer, the second catalyst layer 130 is a cathode catalyst layer; correspondingly, when the first catalyst layer 131 is a cathode catalyst layer, the second catalyst layer 130 is an anode catalyst layer.
In the embodiment, the membrane electrode assembly 10 is filled with gaseous or liquid fuel, hydrogen gas is catalytically reacted near the anode catalyst layer to generate hydrogen ions and electrons, the hydrogen ions are transmitted to the cathode through the proton exchange membrane, and the electrons are transmitted to the cathode from an external circuit; the oxygen gas is catalyzed near the cathode catalyst layer and is combined with electrons from an external circuit to generate oxygen ions, and then the oxygen ions are combined with hydrogen ions to generate water.
Since the electrolyte membrane 100 can transmit only protons and ions but not electrons, when electricity is generated by reaction on the cathode catalyst layer, the electrons are not dispersed to the anode catalyst layer through the electrolyte membrane 100, but are transmitted to the outside of the membrane electrode assembly 10 through a lead wire, thereby generating electricity.
In the embodiment shown in fig. 1 to 4, the first catalyst layer 131 is located above the electrolyte membrane 100, the second catalyst layer 130 is located below the electrolyte membrane 100, the edge protection members 15 are located on the left and right sides of the first catalyst layer 131 and the second catalyst layer 130, and the edge protection members 15 can protect the electrolyte membrane 100.
It should be noted that the membrane electrode assembly 10 in the embodiment shown in fig. 1-4 is assembled by being stacked up and down, and in practical application, it may be assembled left and right, and the concept of up, down, left and right should not be construed as limiting the invention.
Further, as shown in fig. 1 to 4, the length of the first catalyst layer 131 is greater than the length of the second catalyst layer 130, and both ends of the electrolyte membrane 100 protrude outward beyond both ends of the first catalyst layer 131, so that manufacturing tolerances can be further improved, and the shorter second catalyst layer 130 is also advantageous in reducing an overpotential associated with mass transport and the like.
Further, as shown in fig. 1, the edge protection members 15 are provided at both ends of the electrolyte membrane 100, that is, the edge protection members 15 are provided on both upper and lower sides of the left and right ends of the electrolyte membrane 100, and specifically, the edge protection members 15 at each end of the electrolyte membrane 100 include a first edge protection member 151 and a second edge protection member 152, and the first edge protection member 151 is located on the upper side of the left side of the electrolyte membrane 100 and the second edge protection member 152 is located on the lower side of the left side of the electrolyte membrane 100, the electrolyte membrane 100 can be prevented from being shortened.
Both end faces of the first catalyst layer 131 are in contact with the corresponding edge protection elements 15, that is, the left end face of the first catalyst layer 131 is in contact with the left edge protection element 15, and the right end face of the first catalyst layer 131 is in contact with the right edge protection element 15. At least one end surface of the second catalyst layer 130 is spaced apart from the corresponding edge protection element 15, that is, the second catalyst layer 130 may be spaced apart only between the left and left edge protection elements 15, or may be spaced apart only between the right and right edge protection elements 15 of the second catalyst layer 130, or of course, the left and right edge protection elements 15 of the second catalyst layer 130 may be spaced apart, and the gap compensator 14 may be disposed at the space between the end surface of the second catalyst layer 130 and the edge protection elements 15, and the gap compensator 14 may fill the gap between the end surface of the second catalyst layer 130 and the edge protection elements 15.
In a specific embodiment, since there is a tolerance between the first catalyst layer 131 and the second catalyst layer 130 and the electrolyte membrane 100, and therefore there is a gap between the end face of the second catalyst layer 130 and the edge protection element 15, and by providing the gap compensation member 14, the gap between the second catalyst layer 130 and the edge protection element 15 can be filled, so that it is possible to solve the problem that the electrolyte membrane 100 is easily damaged or punctured during mass production and manufacturing of the membrane electrode assembly 10 due to the manufacturing tolerance between the electrolyte membrane 100 and the electrode catalyst layers, and specifically, when the membrane electrode assembly 10 is packaged, it is often found that the electrolyte membrane 100 is damaged or punctured due to the extrusion of the first catalyst layer 131 and the second catalyst layer 130 on the electrolyte membrane 100 caused by the incomplete alignment between the second catalyst layer 130 and the edge protection element 15, by providing the gap compensator 14, the safety of the electrolyte membrane 100 in the production process is ensured, thereby ensuring a high production yield of the membrane electrode assembly 10.
Specifically, as shown in fig. 3, the gap compensator 14 may include a first gap compensator 120 and a second gap compensator 121, the first gap compensator 120 is adapted to fill the gap between the second catalyst layer 130 and the second edge protection element 152 on the left side, and the second gap compensator 121 is adapted to fill the gap between the second catalyst layer 130 and the second edge protection element 152 on the right side, so as to ensure no gap is left between the second catalyst layer 130 and the edge protection element 15.
Specifically, the gap compensator 14 is composed of a thermoset polymer such as epoxy, polyimide, silicone, etc., which ensures that the gap compensator 14 does not electrochemically react with the fuel cell and interact with other materials in the stack.
In the membrane electrode assembly 10 of the present invention, the gap compensator 14 is disposed between the second catalyst layer 130 and the edge protection element 15, so that the gap between the second catalyst layer 130 and the edge protection element 15 can be filled, thereby ensuring the safety of the electrolyte membrane 100 in the production process, preventing the first catalyst layer 131 and the second catalyst layer 130 from pressing the electrolyte membrane 100 when the membrane electrode assembly 10 is packaged, causing damage or puncture to the electrolyte membrane 100, and ensuring a high yield of the assembly of the membrane electrode assembly 10.
Further, as shown in fig. 1 to 4, the edge protection element 15 may include: the electrolyte membrane comprises a base membrane layer 11 and a bonding layer 12, wherein the base membrane layer 11 is fixedly connected with the bonding layer 12, the base membrane layer 11 is arranged on each of two sides of the end portion of the electrolyte membrane 100, and the bonding layer 12 is arranged between each base membrane layer 11 and the electrolyte membrane 100, namely, the base membrane layer 11 is located far away from the electrolyte membrane 100 compared with the bonding layer 12.
Further, both end faces of the first catalyst layer 131 are in contact with the base film layer 11 of the corresponding edge protection element 15, specifically, as shown in fig. 1 to 2, the base film layer 11 includes a first base film layer 112 and a second base film layer 113, the bonding layer 12 includes a first bonding layer 110 and a second bonding layer 111, and the first base film layer 112 and the first bonding layer 110 are fixedly connected to be located on the upper sides of both left and right ends of the electrolyte membrane 100, and the second base film layer 113 and the second bonding layer 111 are fixedly connected to be located on the lower sides of both left and right ends of the electrolyte membrane 100. Therefore, the end face of the first catalyst layer 131 may be in contact with the first base film layer 112.
Further, as shown in fig. 1 to 4, the gap compensator 14 is disposed between the second catalyst layer 130 and the base film layer 11 of the corresponding edge protection element 15. That is, the gap compensator 14 is located in the gap between the second catalyst and the second base film layer 113. That is, the gap between the second catalyst layer 130 and the edge protection element 15 is the gap between the second catalyst layer 130 and the second base film layer 113, and the gap compensator 14 may fill the gap between the second catalyst layer 130 and the second base film layer 113, so as to ensure no gap between the second catalyst layer 130 and the base film layer 11, thereby ensuring the safety of the electrolyte membrane 100.
Specifically, the base film layer 11 may be assembled from a polyester, a fluoropolymer, or a polycarbonate film type polymer material. The bonding layer 12 may be fabricated from a thermoplastic material consisting of a modified polyether, polyester, polyamide or polyethylene.
Further, the gap compensator 14 may be a viscous sealing member, and due to the viscosity of the viscous sealing member, it is ensured that the second catalyst layer 130 can be easily placed in the membrane electrode assembly 10, and is not easy to displace, so that the difficulty of assembling the membrane electrode assembly 10 can be reduced. In a particular embodiment, the gap compensator 14 may be formed in the gap between the second catalyst layer 130 and the second base film layer 113 using a spray process.
Further, as shown in fig. 1 to 2, a side of each base film layer 11 away from the electrolyte membrane 100 is provided with a support frame 13. Specifically, the support frame 13 includes a first support frame 115 and a second support frame 114, the first support frame 115 being located above both left and right ends of the electrolyte membrane 100, and the second support frame 114 being located below both left and right ends of the electrolyte membrane 100. The electrolyte membrane 100, the base film layer 11, and the bonding layer 12 may be supported by providing the support frame 13.
Specifically, the edge protection element 15 further includes: a first gas diffusion layer 123 disposed on the first catalyst layer 131, and a second gas diffusion layer 122 disposed on the second catalyst layer 130, wherein both end faces of the first gas diffusion layer 123 and the second gas diffusion layer 122 are in contact with the base film layer 11 of the corresponding edge protection element 15.
Alternatively, the section of the gap compensator 14 is similar to an "L" shape, specifically, the longer end of the gap compensator 14 is suitable for filling the gap between the second catalyst layer 130 and the base membrane layer 11, and the shorter end of the gap compensator 14 can also fill the gap between the second catalyst layer 130 and the second gas diffusion layer 122, so as to realize indirect contact between the second catalyst layer 130 and the second gas diffusion layer 122, and solve the problem that when the membrane electrode assembly 10 is assembled, the tolerance existing between the second catalyst layer 130 and the second gas diffusion layer 122, ensures that the second catalyst layer 130 and the second gas diffusion layer 122 are still in a connected state, thereby ensuring that electrons can be normally transferred between the second catalyst layer 130 and the second gas diffusion layer 122, meanwhile, the gap compensator 14 may also support both left and right ends of the electrolyte membrane 100, thereby ensuring that the electrolyte membrane 100 is not easily damaged or punctured.
Further, as shown in fig. 1 and 4, a first plate 140 is disposed on a side of the first gas diffusion layer 123 away from the first catalyst layer 131, and a first gas flow channel 142 is formed between the first plate 140 and the first gas diffusion layer 123, so that a gas catalytically generated on the first catalyst layer 131 flows between the first plate 140 and the first gas diffusion layer 123; the second electrode plate 141 is disposed on the side of the second gas diffusion layer 122 away from the second catalyst layer 130, and a second gas flow channel 144 is formed between the second electrode plate 141 and the second gas diffusion layer 122, so as to ensure that the gas catalytically generated on the second catalyst layer 130 flows between the second electrode plate 141 and the second gas diffusion layer 122. By providing the first gas flow path 142 and the second gas flow path 144, it is possible to prevent the gas crossover from occurring when the first catalyst layer 131 and the second catalyst layer 130 are catalyzed by degradation.
According to some embodiments of the invention, the first catalyst layer 131 is an anode catalyst layer, and the second catalyst layer 130 is a cathode catalyst layer; alternatively, the first catalyst layer 131 is a cathode catalyst layer and the second catalyst layer 130 is an anode catalyst layer.
A method of assembling a membrane electrode assembly 10 according to another aspect of the present invention may be used to assemble the membrane electrode assembly 10 described above, and as shown in fig. 5, the assembling method may include:
first, the first catalyst layer 131 is coated on one side of the electrolyte membrane 100, and the second catalyst layer 130 is coated on the other side of the electrolyte membrane 100;
secondly, edge protection elements 15 are provided at both ends of the electrolyte membrane 100, so that both end faces of the first catalyst layer 131 are in contact with the corresponding edge protection elements 15, and at least one end face of the second catalyst layer 130 is spaced apart from the corresponding edge protection elements 15;
then, the first gas diffusion layer 123 is placed on the side of the first catalyst layer 131 away from the electrolyte membrane 100, and both end faces of the first gas diffusion layer 123 are in contact with the corresponding edge protection elements 15;
next, the gap compensator 14 is provided at the interval between the end face of the second catalyst layer 130 and the edge protection element 15 to compensate for the tolerance between the first catalyst layer 131, the second catalyst layer 130, and the electrolyte membrane 100;
finally, the second gas diffusion layer 122 is placed on the side of the second catalyst layer 130 remote from the electrolyte membrane 100, and both end faces of the second gas diffusion layer 122 are brought into contact with the corresponding edge protection members 15, thereby completing the assembly of the membrane electrode assembly 10.
The membrane electrode assembly 10 assembled by the method has the advantages that the structure of the membrane electrode assembly 10 is stable, the safety of the electrolyte membrane 100 is high, and the high assembly yield of the membrane electrode assembly 10 can be ensured.
A fuel cell module 20 according to an embodiment of the third aspect of the invention includes the membrane electrode assembly 10 described above.
Further, the membrane electrode assemblies 10 are plural, and the cooling channel 143 is provided between two adjacent membrane electrode assemblies 10. In the embodiment shown in fig. 4, the number of the membrane electrode assemblies 10 in the fuel cell module 20 is two, two membrane electrode assemblies 10 can be connected in series, and a cooling channel 143 is provided between two membrane electrode assemblies 10, so as to ensure that the adjacent ends of the two membrane electrode assemblies 10 are convenient for heat dissipation, and prevent the membrane electrode assemblies 10 from being burned out due to excessive heat generated by the two membrane electrode assemblies 10 due to catalytic action and excessive temperature of the membrane electrode assemblies 10.
In an embodiment not shown, the number of membrane electrode assemblies 10 in the fuel cell module 20 may be three or five. Fuel cell modules 20 having different amounts of electricity can be formed by connecting different numbers of membrane electrode assemblies 10 in series.
The microstructures of the first and second catalyst layers 131 and 130 are porous in nature, and can transport fuel gas and water generated by the electrochemical reaction into the catalyst layers. Finally, additional microporous layers, i.e., a first gas diffusion layer 123, a second gas diffusion layer 122, are placed adjacent to each catalyst layer. The gas diffusion layer is electrically conductive, helps redistribute the fuel gas used in the catalyst layer, prevents the catalyst layer from inducing gas crossover, and also prevents the membrane electrode assembly 10 from shorting.
In some embodiments, not shown, the lengths of the first gas diffusion layer 123 and the second gas diffusion layer 122 are equal, and the lengths of the first gas diffusion layer 123 and the second gas diffusion layer 122 exceed the lengths of the first catalyst layer 131 and the second catalyst layer 130, both end faces of the first gas diffusion layer 123 are in contact with the corresponding edge protection elements 15, and both end faces of the second gas diffusion layer 122 are in contact with the corresponding edge protection elements 15. At least one end face of the first catalyst layer 131 has a gap with the corresponding edge protection element 15, at least one end face of the second catalyst layer 130 has a gap with the corresponding edge protection element 15, a gap compensator 14 is arranged at the gap between the end face of the first catalyst layer 131 and the edge protection element 15, and a gap compensator 14 is arranged at the gap between the end face of the second catalyst layer 130 and the edge protection element 15. In this case, the lengths of the first catalyst layer 131 and the second catalyst layer 130 may be equal or may not be equal.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A membrane electrode assembly (10), comprising:
an electrolyte membrane (100);
a first catalyst layer (131) disposed on one side of the electrolyte membrane (100) and a second catalyst layer (130) disposed on the other side of the electrolyte membrane (100), both ends of the electrolyte membrane (100) protruding outward beyond both ends of the first catalyst layer (131);
a first gas diffusion layer (123) disposed on the first catalyst layer (131) and a second gas diffusion layer (122) disposed on the second catalyst layer (130);
edge protection elements (15), the edge protection elements (15) are arranged at two ends of the electrolyte membrane (100), two end faces of the first gas diffusion layer (123) and the second gas diffusion layer (122) are in contact with the corresponding edge protection elements (15), a gap is arranged between at least one end face of the first catalyst layer (131) and/or the second catalyst layer (130) and the corresponding edge protection element (15), and a gap compensator (14) is arranged at the gap.
2. The membrane electrode assembly (10) according to claim 1, characterized in that the edge protection element (15) comprises: the edge protection element comprises a base film layer (11) and a bonding layer (12), wherein the base film layer (11) is arranged on two sides of the end part of the electrolyte membrane (100), the bonding layer (12) is arranged between each base film layer (11) and the electrolyte membrane (100), and the end faces of two ends of each first gas diffusion layer (123) and each second gas diffusion layer (122) are in contact with the corresponding base film layer (11) of the edge protection element (15).
3. The membrane electrode assembly (10) according to claim 2, wherein the length of the first catalyst layer (131) is greater than the length of the second catalyst layer (130), both end faces of the first catalyst layer (131) are in contact with the base film layers (11) of the corresponding edge protection elements (15), and the gap compensator (14) is disposed between the second catalyst layer (130) and the base film layers (11) of the corresponding edge protection elements (15).
4. The membrane electrode assembly (10) according to claim 1, characterized in that the gap compensator (14) is a viscous seal.
5. The membrane electrode assembly (10) according to claim 2, characterized in that a side of each base membrane layer (11) remote from the electrolyte membrane (100) is provided with a support frame (13).
6. The membrane electrode assembly (10) according to claim 1, characterized in that a side of the first gas diffusion layer (123) remote from the first catalyst layer (131) is provided with a first plate (140), a first gas flow channel (142) being formed between the first plate (140) and the first gas diffusion layer (123); a second polar plate (141) is arranged on the side, far away from the second catalyst layer (130), of the second gas diffusion layer (122), and a second gas flow channel (144) is formed between the second polar plate (141) and the second gas diffusion layer (122).
7. The membrane electrode assembly (10) according to claim 1, wherein the first catalyst layer (131) is an anode catalyst layer and the second catalyst layer (130) is a cathode catalyst layer; alternatively, the first catalyst layer (131) is a cathode catalyst layer and the second catalyst layer (130) is an anode catalyst layer.
8. A method of assembling a membrane electrode assembly (10), the membrane electrode assembly (10) being a membrane electrode assembly (10) according to any one of claims 1 to 7, the method comprising:
coating a first catalyst layer (131) on one side of the electrolyte membrane (100) and a second catalyst layer (130) on the other side of the electrolyte membrane (100);
arranging edge protection elements (15) at both ends of the electrolyte membrane (100) such that both end faces of the first catalyst layer (131) are in contact with the corresponding edge protection elements (15), and at least one end face of the second catalyst layer (130) is spaced apart from the corresponding edge protection elements (15);
placing a first gas diffusion layer (123) on the side of the first catalyst layer (131) far away from the electrolyte membrane (100), and enabling the end faces of both ends of the first gas diffusion layer (123) to be in contact with the corresponding edge protection elements (15);
-providing a gap compensator (14) at the spacing of the end face of the second catalyst layer (130) from the edge protection element (15);
and placing a second gas diffusion layer (122) on one side of the second catalyst layer (130) far away from the electrolyte membrane (100), and enabling the end faces of both ends of the second gas diffusion layer (122) to be in contact with the corresponding edge protection elements (15).
9. A fuel cell module (20), characterized by comprising a membrane electrode assembly (10) according to any one of claims 1 to 7.
10. The fuel cell module (20) according to claim 9, wherein the membrane electrode assemblies (10) are plural, and a cooling channel (143) is provided between adjacent two of the membrane electrode assemblies (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910100392.1A CN111509258B (en) | 2019-01-31 | 2019-01-31 | Membrane electrode assembly, method for assembling membrane electrode assembly, and fuel cell module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910100392.1A CN111509258B (en) | 2019-01-31 | 2019-01-31 | Membrane electrode assembly, method for assembling membrane electrode assembly, and fuel cell module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111509258A CN111509258A (en) | 2020-08-07 |
| CN111509258B true CN111509258B (en) | 2021-08-20 |
Family
ID=71870742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910100392.1A Active CN111509258B (en) | 2019-01-31 | 2019-01-31 | Membrane electrode assembly, method for assembling membrane electrode assembly, and fuel cell module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111509258B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101147287A (en) * | 2005-03-23 | 2008-03-19 | 株式会社东芝 | Fuel cell |
| CN104170134A (en) * | 2012-03-15 | 2014-11-26 | 日产自动车株式会社 | Fuel cell |
| CN104205449A (en) * | 2012-03-22 | 2014-12-10 | 日产自动车株式会社 | Cell structure of fuel cell |
| CN106941182A (en) * | 2017-02-20 | 2017-07-11 | 南京大学 | A kind of membrane electrode of fuel batter with proton exchange film sealed frame |
| CN109148913A (en) * | 2017-06-15 | 2019-01-04 | 丰田自动车株式会社 | The method of fuel cell and manufacture fuel cell |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8546045B2 (en) * | 2005-09-19 | 2013-10-01 | 3M Innovative Properties Company | Gasketed subassembly for use in fuel cells including replicated structures |
| JP5945481B2 (en) * | 2012-09-18 | 2016-07-05 | 本田技研工業株式会社 | Manufacturing method of fuel cell |
-
2019
- 2019-01-31 CN CN201910100392.1A patent/CN111509258B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101147287A (en) * | 2005-03-23 | 2008-03-19 | 株式会社东芝 | Fuel cell |
| CN104170134A (en) * | 2012-03-15 | 2014-11-26 | 日产自动车株式会社 | Fuel cell |
| CN104205449A (en) * | 2012-03-22 | 2014-12-10 | 日产自动车株式会社 | Cell structure of fuel cell |
| CN106941182A (en) * | 2017-02-20 | 2017-07-11 | 南京大学 | A kind of membrane electrode of fuel batter with proton exchange film sealed frame |
| CN109148913A (en) * | 2017-06-15 | 2019-01-04 | 丰田自动车株式会社 | The method of fuel cell and manufacture fuel cell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111509258A (en) | 2020-08-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4719771B2 (en) | Electrode-membrane-frame assembly for fuel cell and manufacturing method thereof, and polymer electrolyte fuel cell and manufacturing method thereof | |
| US9005838B2 (en) | Fuel cell stack | |
| KR101016445B1 (en) | Stack and fuel cell power generation system having the same | |
| CN100438187C (en) | High temperature fuel cell system | |
| JP2014029834A (en) | Membrane electrode assembly for fuel cell | |
| JP2017139218A (en) | Method of producing fuel cell stack and method of producing metal separator for fuel cell | |
| JP5839122B2 (en) | Fuel cell stack | |
| KR101387451B1 (en) | Electrochemical device | |
| US20040018415A1 (en) | Flat fuel cell assembly and connection structure thereof | |
| JP2019192579A (en) | Fuel cell stack, dummy cell for fuel cell stack, and method of manufacturing dummy cell | |
| KR20050001475A (en) | Fuel cell casing and fuel cell | |
| RU2740133C1 (en) | Fuel cell | |
| CN111509258B (en) | Membrane electrode assembly, method for assembling membrane electrode assembly, and fuel cell module | |
| US8101314B2 (en) | Separator and fuel cell | |
| JP5109570B2 (en) | Fuel cell stack | |
| CN113675422B (en) | fuel cell stack | |
| CN220189700U (en) | Membrane electrode unit for electrochemical cells | |
| JP2012124020A (en) | Solid electrolyte fuel battery | |
| KR101162669B1 (en) | Solid oxide fuel cell | |
| KR20230092959A (en) | Membrane-electrode assembly for electrochemical cell and manufacturing method of membrane-electrode assembly | |
| CN110534787B (en) | Terminal plate for fuel cell | |
| KR20020074046A (en) | Monopolar cell pack of direct methanol fuel cell | |
| JP2004363073A (en) | Fuel cell laminating structure | |
| JP2006338880A (en) | Membrane-electrode assembly and fuel cell | |
| JP3636126B2 (en) | Fuel cell seal structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |