Membrane electrode, membrane electrode device, and electrolytic cell

Abstract

The application discloses a membrane electrode, a membrane electrode device and an electrolytic cell, and relates to the technical field of membrane electrodes. The anode frame and the cathode frame are connected through a non-adhesive connection mode, and no adhesive is used, so that the problems of overflow and string leakage caused by adhesive failure can be avoided.

Description

Technical Field

[0001] This application relates to the field of membrane electrode device technology, and in particular to a membrane electrode, a membrane electrode device and an electrolytic cell. Background Technology

[0002] Membrane electrode assemblies (MEAs) are the core carriers of electrochemical reactions in fuel cells / electrolyzers, enabling directional conduction of anions / protons, efficient electron transfer, and precise isolation of reactant gases. A MEA mainly consists of an anion / proton exchange membrane, a catalyst layer, a gas diffusion layer, and a sealing frame. Current MEA encapsulation methods primarily involve cutting a polymer membrane material with an adhesive into a specific shape and bonding it to the anion / proton exchange membrane, followed by curing and air bubble removal using processes such as hot rolling / cold rolling.

[0003] The problem with adhesive encapsulation is that there is a certain amount of adhesive overflow during encapsulation. Utility Model Content

[0004] This application provides a membrane electrode, a membrane electrode device, and an electrolytic cell, which can improve the problem of adhesive overflow during membrane electrode encapsulation.

[0005] To achieve the above objectives, according to a first aspect of this application, a membrane electrode is provided comprising: Anodized border; and The cathode frame is stacked with the anode frame along a first direction; The anode frame and the cathode frame are connected by a non-adhesive connection.

[0006] In embodiments of this invention, by connecting the anode frame and the cathode frame in a non-adhesive manner without using adhesive, the problems of adhesive overflow and leakage sealing caused by adhesive failure can be avoided.

[0007] In some embodiments, the cathode frame is welded to the anode frame to form a weld.

[0008] In the embodiments of this utility model, by welding the cathode frame and the anode frame together, adhesives can be eliminated, thereby avoiding problems such as glue overflow and leakage caused by adhesive failure. At the same time, it can improve the alignment accuracy of the anode frame and the cathode frame, simplify the processing steps, reduce production costs, and improve long-term sealing reliability.

[0009] In some embodiments, an ion exchange membrane is further included, which is fixed between the anode frame and the cathode frame and is welded to the anode frame and the cathode frame.

[0010] In embodiments of this invention, by welding the ion exchange membrane to the anode frame and the cathode frame, the ion exchange membrane can be more stably fixed between the anode frame and the cathode frame, thereby improving the safety and efficiency of the fuel cell / electrolyzer system.

[0011] In some embodiments, the anode frame is provided with an anode through hole along the first direction, the cathode frame is provided with a cathode through hole along the first direction, and the ion exchange membrane separates the anode through hole and the cathode through hole; From a perspective along the first direction, the weld surrounds the anode through-hole and the cathode through-hole, and is located within the boundary of the ion exchange membrane.

[0012] In embodiments of this invention, by making the weld seam surround the anode through hole and the cathode through hole and located within the boundary of the ion exchange membrane, the ion exchange membrane, the anode frame and the cathode frame can be sealed together, thereby improving the sealing performance between the anode frame and the cathode frame.

[0013] In some embodiments, the anode frame and the cathode frame are provided with mounting holes along the first direction; From a perspective along the first direction, the weld is located inside the assembly hole.

[0014] In embodiments of this utility model, by positioning the weld seam inside the assembly hole, a sealed connection between the anode frame and the cathode frame can be easily achieved through welding.

[0015] In some embodiments, the width of the weld is 0.5 mm to 3 mm; and / or The weld extends through the cathode frame and the anode frame along the first direction; and / or The weld seam is made of multiple turns.

[0016] In embodiments of this invention, controlling the width of the weld seam improves welding stability and facilitates processing. Enabling the weld seam to penetrate both the cathode and anode frames further enhances welding stability and processing ease. Using multiple weld seams improves the sealing between the welded anode and cathode frames.

[0017] In some embodiments, the anode frame and the cathode frame are magnetically connected.

[0018] In the embodiments of this utility model, by using magnetic connection to connect the cathode frame and the anode frame, adhesive can be eliminated, thereby avoiding problems such as glue overflow and leakage sealing caused by adhesive failure. At the same time, it can improve the alignment accuracy of the anode frame and the cathode frame, simplify the processing steps, reduce production costs, and improve long-term sealing reliability.

[0019] In some embodiments, the anode frame and the cathode frame are magnetic, and the magnetic energy product of the anode frame and the cathode frame is 0.60 MGOe-1.50 MGOe.

[0020] In embodiments of this invention, by making the anode frame and cathode frame magnetic and controlling the magnetic energy product of the anode frame and cathode frame, the connection stability of the anode frame and cathode frame can be improved.

[0021] In some embodiments, at least one of the anode frame and the cathode frame includes a magnetic layer, which is a single-layer structure.

[0022] In embodiments of this invention, the manufacturing process can be simplified by forming a magnetic layer from a magnetic material on the anode and cathode frames.

[0023] In some embodiments, the cathode frame includes a first sub-layer and a second sub-layer stacked and connected along a first direction, the second sub-layer being magnetic and magnetically connected to the anode frame, so that the cathode frame and the anode frame are magnetically connected; or The cathode frame includes a first magnet and a first coating layer covering the first magnet, and the first magnet is magnetically connected to the anode frame.

[0024] In embodiments of this invention, by making the second sub-layer magnetic, the stability of the magnetic connection between the cathode frame and the anode frame, as well as the mechanical strength of the cathode frame, can be improved. By including a first magnet and a first covering layer covering the first magnet in the cathode frame, the processing of the cathode frame can be facilitated, while the sealing between the cathode frame and the anode frame and the mechanical strength of the cathode frame can be improved.

[0025] In some embodiments, the anode frame includes a third sub-layer and a fourth sub-layer stacked and connected along a first direction, the third sub-layer being magnetic and magnetically connected to the cathode frame, so that the anode frame and the cathode frame are magnetically connected; or The anode frame includes a second magnet and a second coating layer covering the second magnet, and the second magnet is magnetically connected to the cathode frame.

[0026] In embodiments of this invention, by making the third sub-layer magnetic, the stability of the magnetic connection between the cathode frame and the anode frame, as well as the mechanical strength of the anode frame, can be improved. By including a second magnet and a second covering layer covering the second magnet in the anode frame, the processing of the anode frame can be facilitated, while the sealing between the cathode frame and the anode frame and the mechanical strength of the anode frame can be improved.

[0027] In some embodiments, the thickness of the anode frame along the first direction is 0.05mm-3mm; and / or The thickness of the cathode frame along the first direction is 0.05mm-3mm.

[0028] In embodiments of this invention, controlling the thickness of the anode frame and the cathode frame facilitates the welding operation.

[0029] According to a second aspect of this application, a membrane electrode device is provided, comprising the membrane electrode described above.

[0030] According to a third aspect of this application, an electrolytic cell is provided, including a cathode plate; In the aforementioned membrane electrode, the cathode frame is magnetically connected to the cathode plate.

[0031] In embodiments of this invention, the connection stability between the cathode frame and the cathode plate can be improved by magnetically connecting the cathode frame and the cathode plate. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0034] Figure 1 This is a schematic diagram of the structure of the membrane electrode provided in an exemplary embodiment of this disclosure; Figure 2 This is an exploded view of the membrane electrode provided in an exemplary embodiment of this disclosure; Figure 3 This is a cross-sectional view of the cathode frame provided in an exemplary embodiment of this disclosure; Figure 4 This is another cross-sectional view of the cathode frame provided in an exemplary embodiment of this disclosure; Figure 5 This is a cross-sectional view of the anode frame provided in an exemplary embodiment of this disclosure; Figure 6 This is another cross-sectional view of the anode frame provided in an exemplary embodiment of this disclosure.

[0035] Explanation of reference numerals in the attached figures: 1. Anode frame; 11. Third sub-layer; 12. Fourth sub-layer; 13. Second magnet; 14. Second cladding layer; 15. Anode through-hole; 2. Cathode frame; 21. First sub-layer; 22. Second sub-layer; 23. First magnet; 24. First cladding layer; 25. Cathode through-hole; 3. Ion exchange membrane; 4. Weld seam; 5. Assembly hole. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0037] The membrane electrode uses adhesive encapsulation, which also has problems such as insufficient tooling alignment accuracy, complex processing procedures, high material / equipment costs, insufficient long-term sealing reliability under operating conditions, and leakage sealing problems caused by adhesive failure.

[0038] This application provides a membrane electrode device, including a membrane electrode.

[0039] It is understood that the membrane electrode device of this application can be a fuel cell, an electrolyzer, or other device including a membrane electrode. The membrane electrode device of this application has the membrane electrode described below, and therefore possesses all the beneficial effects of the membrane electrode described below, which will not be repeated here.

[0040] This application also provides an electrolytic cell, comprising: Cathode plate; The membrane electrode includes a cathode frame 2, which is magnetically connected to the cathode plate.

[0041] It is understood that the cathode frame 2 can be magnetic, and the cathode plate can be made of a magnetic metal, thereby enabling the cathode frame 2 and the cathode plate to be magnetically connected. The electrolytic cell of this application has the membrane electrode described below, and therefore the electrolytic cell of this application has all the beneficial effects of the membrane electrode described below, which will not be repeated here.

[0042] As an example, the cathode frame 2 can be made of rubber or plastic doped with magnetic materials, thus making the cathode frame 2 magnetic. Alternatively, a magnet can be implanted inside the cathode frame 2 to make it magnetic. The magnetic material can be permanent magnet powder such as ferrite, neodymium iron boron, and samarium cobalt. The plastic can be polyphenylene sulfide (PPS), polychlorotrifluoroethylene (PCTFE), or poly(4-methylpentene-1) (TPX).

[0043] For the membrane electrode provided in this application, please refer to [link / reference needed]. Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of the membrane electrode provided in the embodiments of this application. Figure 1 This is an exploded view of a membrane electrode provided in an embodiment of this application. The membrane electrode includes: Anode frame 1; and The cathode frame 2 is stacked with the anode frame 1 along the first direction A; The anode frame 1 and the cathode frame 2 are connected by a non-adhesive connection.

[0044] As an example, the anode frame 1 and the cathode frame 2 can be sealed by welding, magnetic connection, or a combination of both. Compared to connecting the anode frame 1 and the cathode frame 2 with adhesive, welding and / or magnetic connection do not use adhesive for encapsulation, thus avoiding problems such as adhesive overflow and leakage due to adhesive failure. Furthermore, welding and / or magnetic connection processes are simpler, have lower production costs, and offer higher long-term sealing reliability.

[0045] As an example, the anode frame 1 and the cathode frame 2 are the same shape and size.

[0046] In some embodiments, the anode frame 1 and the cathode frame 2 are welded together to form a weld 4.

[0047] As an example, welding connections can be laser welding, ultrasonic welding, friction vibration welding, or solvent welding.

[0048] In some embodiments, an ion exchange membrane 3 is further included, which is fixed between the anode frame 1 and the cathode frame 2 and is welded to the anode frame 1 and the cathode frame 2.

[0049] Understandably, the anode frame 1 and cathode frame 2 have a hollow structure in the middle. The ion exchange membrane 3 is fixed around its perimeter between the anode frame 1 and cathode frame 2, with its center exposed within the hollow structure, thus providing an active reaction area. During the welding connection of the anode frame 1 and cathode frame 2, the perimeter of the ion exchange membrane 3, which is fixed between the anode frame 1 and cathode frame 2, can also be welded together with the anode frame 1 and cathode frame 2, thereby making the ion exchange membrane 3 more stably fixed between the anode frame 1 and cathode frame 2.

[0050] As an example, ion exchange membrane 3 can be an anion exchange membrane or a proton exchange membrane.

[0051] In some embodiments, the anode frame 1 is provided with an anode through hole 15 along the first direction, the cathode frame 2 is provided with a cathode through hole 25 along the first direction, and the ion exchange membrane 3 separates the anode through hole 15 and the cathode through hole 25; From a perspective along the first direction, the weld 4 surrounds the anode through-hole 15 and the cathode through-hole 25 and is located within the boundary of the ion exchange membrane 3.

[0052] It is understood that both the anode frame 1 and the cathode frame 2 are sheet-like structures with hollowed-out sections in the middle, and have anode through holes 15 and cathode through holes 25 respectively. The weld 4 can form a closed shape around the anode through holes 15 and cathode through holes 25. This closed shape is the same as the shape of the anode frame 1 and the cathode frame 2, so as to seal and connect the anode frame 1 and the cathode frame 2.

[0053] As an example, both the anode frame 1 and the cathode frame 2 are annular, and the shape formed by the weld 4 is circular.

[0054] In some embodiments, the anode frame 1 and the cathode frame 2 are provided with mounting holes 5 along the first direction; From a perspective along the first direction, the weld 4 is located inside the assembly hole 5.

[0055] Understandably, the assembly hole 5 is used to assemble the anode frame 1 and the cathode frame 2 into the fuel cell or electrolyzer. The weld 4 is located inside the assembly hole 5, so that the shape formed by the weld 4 does not contain the assembly hole 5, thereby reducing the need for sealing the assembly hole 5 and simplifying the processing steps.

[0056] In some embodiments, the width of the weld 4 is 0.5mm-3mm, for example, it can be 0.5mm, 1mm, 1.2mm, 1.5mm, 1.7mm, 2mm, 2.2mm, 2.5mm, 2.7mm, 3mm, etc.

[0057] Understandably, if the width of weld 4 is too small, the connection stability between the anode frame 1 and the cathode frame 2 will be insufficient and it will be difficult to process. If the width of weld 4 is too large, the surface flatness of the anode frame 1 and the cathode frame 2 will be reduced, which will not be conducive to the sealing connection between the two.

[0058] In some embodiments, the weld 4 penetrates the cathode frame 2 and the anode frame 1 along the first direction A.

[0059] It is understandable that during welding, the cathode frame 2 and the anode frame 1 need to be stacked together first, and then the welding operation is carried out from the side of the cathode frame 2 away from the anode frame 1 or the side of the anode frame 1 away from the cathode frame 2. Therefore, by making the weld 4 penetrate through the cathode frame 2 and the anode frame 1 along the first direction A, the welding operation can be facilitated, and the welding symmetry and stability can be improved at the same time.

[0060] In some embodiments, multiple weld seams 4 are provided.

[0061] As an example, multiple weld seams 4 can be spaced apart and arranged in parallel.

[0062] In some embodiments, the anode frame 1 and the cathode frame 2 are magnetically connected.

[0063] In some embodiments, the anode frame 1 and the cathode frame 2 are magnetic, and the magnetic energy product of the anode frame 1 and the cathode frame 2 is 0.60 MGOe-1.50 MGOe, for example, it can be 0.60 MGOe, 0.70 MGOe, 0.80 MGOe, 0.90 MGOe, 1.00 MGOe, 1.10 MGOe, 1.20 MGOe, 1.30 MGOe, 1.40 MGOe, 1.50 MGOe, etc.

[0064] As an example, the anode frame 1 and cathode frame 2 can be made of rubber or plastic doped with magnetic materials, thus making them magnetic. Alternatively, magnets can be implanted inside the anode frame 1 and cathode frame 2 to make them magnetic. The magnetic material can be permanent magnet powder such as ferrite, neodymium iron boron, and samarium cobalt. The plastic can be polyphenylene sulfide (PPS), polychlorotrifluoroethylene (PCTFE), or poly(4-methylpentene-1) (TPX). The anode frame 1 and cathode frame 2 are magnetically attracted to each other.

[0065] As an example, the anode frame 1 and the cathode frame 2 can be formed by extrusion molding, calendering molding, and injection molding.

[0066] In some embodiments, at least one of the anode frame 1 and the cathode frame 2 includes a magnetic layer, which is a single-layer structure.

[0067] In some embodiments, please refer to Figure 3 The cathode frame 2 includes a first sub-layer 21 and a second sub-layer 22 stacked and connected along a first direction A. The second sub-layer 22 is magnetic and is magnetically connected to the anode frame 1, so that the cathode frame 2 and the anode frame 1 are magnetically connected.

[0068] It is understandable that by adding magnetic powder to the second sub-layer 22, the second sub-layer 22 can be made magnetic, and the magnetic powder can improve the mechanical properties of the cathode frame 2. The thicknesses of the first sub-layer 21 and the second sub-layer 22 can be set as needed.

[0069] In some embodiments, the first sublayer 21 and the second sublayer 22 are integrally formed.

[0070] It is understandable that the material of the second sub-layer 22 is plastic or rubber with added magnetic powder, and the material of the first sub-layer 21 is plastic or rubber. The two can be molded as one piece, thereby simplifying the process.

[0071] In some embodiments, please refer to Figure 4 The cathode frame 2 includes a first magnet 23 and a first covering layer 24 covering the first magnet 23. The first magnet 23 is magnetically connected to the anode frame 1.

[0072] It is understood that the material of the first coating layer 24 can be plastic or rubber. By encapsulating the first magnet 23 in the first coating layer 24, the sealing between the cathode frame 2 and the anode frame 1 can be improved, and the first magnet 23 can also improve the mechanical properties of the cathode frame 2. The first magnet 23 surrounds the anode through-hole 15 and the cathode through-hole 25 and is located within the boundary of the ion exchange membrane 3. The first magnet 23 is a magnetic sheet made of magnetic material. The shape of the first magnet 23 is the same as the shape of the cathode frame 2, and the size of the first magnet 23 can be set as needed.

[0073] As an example, the cathode frame 2 is annular, and the first magnet 23 is also annular.

[0074] In some embodiments, please refer to Figure 5 The anode frame 1 includes a third sub-layer 11 and a fourth sub-layer 12 stacked and connected along a first direction A. The third sub-layer 11 is magnetic and is magnetically connected to the cathode frame 2, so that the anode frame 1 and the cathode frame 2 are magnetically connected.

[0075] It is understandable that by adding magnetic powder to the third sub-layer 11, the third sub-layer 11 can be made magnetic, and the magnetic powder can improve the mechanical properties of the anode frame 1. The thicknesses of the third sub-layer 11 and the fourth sub-layer 12 can be set as needed.

[0076] In some embodiments, the third sublayer 11 and the fourth sublayer 12 are integrally formed.

[0077] It is understandable that the material of the third sub-layer 11 is plastic or rubber with added magnetic powder, and the material of the fourth sub-layer 12 is plastic or rubber. The two can be molded as one piece, thereby simplifying the process.

[0078] In some embodiments, please refer to Figure 6 The anode frame 1 includes a second magnet 13 and a second covering layer 14 covering the second magnet 13. The second magnet 13 is magnetically connected to the cathode frame 2.

[0079] It is understood that the material of the second coating layer 14 can be plastic or rubber. By encapsulating the second magnet 13 in the second coating layer 14, the sealing between the cathode frame 2 and the anode frame 1 can be improved, and the second magnet 13 can also improve the mechanical properties of the cathode frame 2. The second magnet 13 surrounds the anode through-hole 15 and the cathode through-hole 25 and is located within the boundary of the ion exchange membrane 3. The second magnet 13 is a magnetic sheet made of magnetic material. The shape of the second magnet 13 is the same as the shape of the anode frame 1, and the size of the second magnet 13 can be set as needed.

[0080] As an example, the anode frame 1 is annular, and the second magnet 13 is also annular.

[0081] In some embodiments, a first sealing gasket is provided on the side of the anode frame 1 opposite to the cathode frame 2.

[0082] In some embodiments, the thickness H2 of the anode frame 1 along the first direction A is 0.05mm-3mm, for example, it can be 0.5mm, 1mm, 1.2mm, 1.5mm, 1.7mm, 2mm, 2.2mm, 2.5mm, 2.7mm, 3mm, etc.

[0083] It is understandable that by controlling the thickness H2 of the anode frame 1 along the first direction A, different working conditions can be matched, and different welding processes can be matched, thus facilitating welding operations.

[0084] In some embodiments, the thickness H1 of the cathode frame 2 along the first direction A is 0.05mm-3mm, for example, it can be 0.5mm, 1mm, 1.2mm, 1.5mm, 1.7mm, 2mm, 2.2mm, 2.5mm, 2.7mm, 3mm, etc.

[0085] It is understandable that by controlling the thickness H1 of the cathode frame 2 along the first direction A, different working conditions can be matched, and different welding processes can be matched, thus facilitating welding operations.

[0086] In some embodiments, a second sealing gasket is provided on the side of the cathode frame 2 opposite to the anode frame 1.

[0087] Understandably, when the cathode frame 2 and the anode frame 1 are welded together, the sealing gasket can cover the weld 4 and be compatible with the weld 4. When the anode frame and cathode frame are assembled into the fuel cell or electrolyzer, a sealing gasket can be placed on the side of the anode frame and cathode frame away from each other, thereby improving the sealing between the anode frame and cathode frame and other components, and thus improving the sealing performance of the fuel cell or electrolyzer system.

[0088] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0089] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0090] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0091] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A membrane electrode, characterized in that, include: Anode frame (1); as well as The cathode frame (2) is stacked with the anode frame (1) along a first direction; The anode frame (1) and the cathode frame (2) are connected by a non-adhesive connection.

2. The membrane electrode according to claim 1, characterized in that, The cathode frame (2) is welded to the anode frame (1) to form a weld (4).

3. The membrane electrode according to claim 2, characterized in that, It also includes an ion exchange membrane (3) fixed between the anode frame (1) and the cathode frame (2), the ion exchange membrane (3) being welded to the anode frame (1) and the cathode frame (2) through the weld (4).

4. The membrane electrode according to claim 3, characterized in that, The anode frame (1) is provided with an anode through hole (15) along the first direction, the cathode frame (2) is provided with a cathode through hole (25) along the first direction, and the ion exchange membrane (3) separates the anode through hole (15) and the cathode through hole (25). In the first direction, the weld (4) surrounds the anode through hole (15) and the cathode through hole (25) and is located within the boundary of the ion exchange membrane (3).

5. The membrane electrode according to claim 2, characterized in that, The anode frame (1) and the cathode frame (2) are provided with mounting holes (5) along the first direction; In the view along the first direction, the weld (4) is located inside the assembly hole (5).

6. The membrane electrode according to claim 2, characterized in that, The width of the weld (4) is 0.5mm-3mm; and / or The weld (4) extends through the cathode frame (2) and the anode frame (1) along the first direction; and / or The weld (4) is made of multiple turns.

7. The membrane electrode according to claim 1, characterized in that, The anode frame (1) and the cathode frame (2) are magnetically connected.

8. The membrane electrode according to claim 7, characterized in that, The anode frame (1) and the cathode frame (2) are magnetic, and the magnetic energy product of the anode frame (1) and the cathode frame (2) is 0.60MGOe-1.50MGOe.

9. The membrane electrode according to claim 7, characterized in that, At least one of the anode frame (1) and the cathode frame (2) includes a magnetic layer, which is a single-layer structure.

10. The membrane electrode according to claim 7, characterized in that, The cathode frame (2) includes a first sub-layer (21) and a second sub-layer (22) stacked and connected along a first direction. The second sub-layer (22) is magnetic and is magnetically connected to the anode frame (1), so that the cathode frame (2) is magnetically connected to the anode frame (1); or The cathode frame (2) includes a first magnet (23) and a first covering layer (24) covering the first magnet (23), and the first magnet (23) is magnetically connected to the anode frame (1).

11. The membrane electrode according to claim 7, characterized in that, The anode frame (1) includes a third sub-layer (11) and a fourth sub-layer (12) stacked and connected along a first direction. The third sub-layer (11) is magnetic and is magnetically connected to the cathode frame (2), so that the anode frame (1) and the cathode frame (2) are magnetically connected; or The anode frame (1) includes a second magnet (13) and a second covering layer (14) covering the second magnet (13), and the second magnet (13) is magnetically connected to the cathode frame (2).

12. The membrane electrode according to any one of claims 1-11, characterized in that, The thickness of the anode frame (1) along the first direction is 0.05mm-3mm; and / or The thickness of the cathode frame (2) along the first direction is 0.05mm-3mm.

13. A membrane electrode device, characterized in that, Includes the membrane electrode according to any one of claims 1-12.

14. An electrolytic cell, characterized in that, include: Cathode plate; The membrane electrode according to any one of claims 1-12, wherein the cathode frame (2) is magnetically connected to the cathode plate.

Images