Dehumidification structure based on proton exchange membrane and equipment with dehumidification structure

Abstract

The invention provides a dehumidification structure based on a proton exchange membrane and equipment with the dehumidification structure. Wherein an anode catalytic coating is arranged on the first side of the proton exchange membrane, and a cathode catalytic coating is arranged on the second side of the proton exchange membrane; the first gas diffusion layer is arranged on one side, deviating from the proton exchange membrane, of the anode catalytic coating, and the second gas diffusion layer is arranged on one side, deviating from the proton exchange membrane, of the cathode catalytic coating; the first fixing frame is arranged on the side, away from the proton exchange membrane, of the first gas diffusion layer, the second fixing frame is arranged on the side, away from the proton exchange membrane, of the second gas diffusion layer, and the first fixing frame and the second fixing frame are oppositely arranged and press the first gas diffusion layer and the second gas diffusion layer towards the proton exchange membrane. And a sealing structure is formed by fastening through a locking piece. According to the dehumidification structure based on the proton exchange membrane and the equipment with the dehumidification structure, the problems that in the prior art, the humidity is difficult to accurately control, and the dehumidification efficiency is low can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of dehumidification, and in particular to a dehumidification structure based on a proton exchange membrane and a device having the same. Background Art

[0002] In the field of cultural relics protection, precise control of humidity is the core proposition to extend the life of fragile cultural relics. The International Coalition for the Preservation of Cultural Heritage (ICCROM) pointed out that the optimal preservation humidity of organic cultural relics (such as paper books, silk paintings, lacquered wooden objects, etc.) should be controlled in the range of 30%-60% (calculated in relative humidity). Exceeding the threshold will trigger multiple deterioration reactions: the hydrolysis rate of paper cellulose at a relative humidity of 60% increases to 8 to 12 times that of the dry state; silk protein will accelerate brittle fracture when the humidity fluctuation is greater than 15% RH / 24h; the body of lacquerware is more likely to crack on the surface due to moisture absorption and expansion (expansion coefficient of 3.5×10 -4 mm / %RH).

[0003] In the existing technology, humidity control technology mainly includes condensing dehumidifiers and dehumidification with dehumidifiers. Among them, the use of dehumidifiers for dehumidification has bottlenecks such as large vibration and noise, large space occupation, and difficulty in adapting to diverse microenvironments (such as display cabinets and transport boxes). In addition, the existing humidity control technology has complex dehumidification equipment, low humidity control accuracy, and the risk of refrigerant leakage. Summary of the invention

[0004] The main purpose of the present invention is to provide a dehumidification structure based on a proton exchange membrane and a device having the same, so as to solve the problems in the prior art that humidity is difficult to accurately control and the dehumidification efficiency is low.

[0005] In order to achieve the above object, according to one aspect of the present invention, a dehumidification structure based on a proton exchange membrane is provided, comprising:

[0006] A proton exchange membrane, the proton exchange membrane comprising a first side and a second side arranged opposite to the first side, the first side being provided with an anode catalytic coating, and the second side being provided with a cathode catalytic coating;

[0007] A gas diffusion layer, the gas diffusion layer comprising a first gas diffusion layer and a second gas diffusion layer, the first gas diffusion layer being arranged on a side of the anode catalytic coating layer away from the proton exchange membrane, and the second gas diffusion layer being arranged on a side of the cathode catalytic coating layer away from the proton exchange membrane;

[0008] A fixing frame, the fixing frame includes a first fixing frame and a second fixing frame, the first fixing frame is arranged on a side of the first gas diffusion layer away from the proton exchange membrane, the second fixing frame is arranged on a side of the second gas diffusion layer away from the proton exchange membrane, the first fixing frame and the second fixing frame are arranged opposite to each other and press the first gas diffusion layer and the second gas diffusion layer toward the proton exchange membrane, and are fastened by a locking piece to form a sealing structure.

[0009] Further, along the first direction, the thickness of the proton exchange membrane is [0.07, 0.3] mm; and / or,

[0010] The thickness of the anode catalytic coating is [0.2, 0.8] mm; and / or,

[0011] The thickness of the cathode catalytic coating is [0.1, 0.5] mm; and / or,

[0012] The thickness of the first gas diffusion layer and the second gas diffusion layer are both [0.2, 2] mm; and / or,

[0013] The thickness of the first fixing frame and the second fixing frame are both [0.5, 3] mm.

[0014] Furthermore, the proton exchange membrane includes any one of a perfluorosulfonic acid proton exchange membrane, a partially fluorinated polymer membrane, a non-fluorinated polymer proton exchange membrane and a composite proton exchange membrane.

[0015] Furthermore, the first gas diffusion layer and the second gas diffusion layer both include nickel-plated stainless steel layers.

[0016] Furthermore, the first fixing frame and the second fixing frame both include a stainless steel frame or a copper metal frame.

[0017] Furthermore, the locking member includes any one of a bolt, a screw and a pin.

[0018] Furthermore, along the first direction, an air inlet channel is provided on the side of the dehumidification structure close to the first fixed frame and away from the proton exchange membrane, and the air inlet channel is connected to the indoor room to be dehumidified. An exhaust channel is provided on the side of the dehumidification structure close to the second fixed frame and away from the proton exchange membrane, and the exhaust channel is connected to the outside and / or the indoor room.

[0019] Further, the anode catalytic coating comprises a mixed coating of platinum, ruthenium oxide, carbon powder and a first adhesive; or,

[0020] The anode catalytic coating comprises a mixed coating of platinum, rhodium oxide, carbon powder and a first adhesive.

[0021] Further, the mass ratio of the platinum, the ruthenium oxide, the first adhesive and the carbon powder in the mixed coating is [1:5:1:1, 1:10:1:1]; or,

[0022] The mass ratio of the platinum, the rhodium oxide, the first adhesive and the carbon powder in the mixed coating is [1:5:1:1, 1:10:1:1].

[0023] Furthermore, the cathode catalytic coating includes a mixed coating of platinum, graphene and a second adhesive.

[0024] Furthermore, the mass ratio of the platinum, the graphene and the second adhesive in the cathode catalytic coating is [1:1:1, 1:1:5].

[0025] According to another aspect of the present invention, a device is provided, which includes the above-mentioned proton exchange membrane-based dehumidification structure.

[0026] By applying the technical solution of the present invention, an anode catalytic coating and a cathode catalytic coating are respectively arranged on the first side of the proton exchange membrane and the second side arranged opposite to the first side. Under low voltage, an oxygen evolution reaction occurs on the anode catalytic coating to generate oxygen and hydrogen ions (2H 2 O-4e - →4H + +O 2 ), hydrogen ions move to the cathode side driven by the proton exchange membrane and voltage, and react with oxygen on the cathode catalytic coating to generate water (4H + +O 2 →2H 2O), the generated water is discharged outdoors, thereby achieving dehumidification. A first gas diffusion layer is arranged on the side of the anode catalytic coating away from the proton exchange membrane, and a second gas diffusion layer is arranged on the side of the cathode catalytic coating away from the proton exchange membrane. The first gas diffusion layer and the second gas diffusion layer are both porous structures, so that the reaction gas can be evenly distributed. For example, on the anode side, the humid air can quickly penetrate into the anode catalytic coating through the first gas diffusion layer, and the generated water and hydrogen can be smoothly discharged on the cathode side; in addition, the high porosity structure reduces the gas transmission resistance, avoids local concentration polarization, and improves the dehumidification efficiency. Furthermore, a first fixed frame is arranged on the side of the first gas diffusion layer away from the proton exchange membrane, and a second fixed frame is arranged on the side of the second gas diffusion layer away from the proton exchange membrane, and the first fixed frame and the second fixed frame are arranged relative to each other and press the first gas diffusion layer and the second gas diffusion layer toward the proton exchange membrane, and are fastened by a locking member to form a sealing structure. Among them, the first fixed frame and the second fixed frame play the role of supporting, sealing and fixing. The gas diffusion layer and the proton exchange membrane are pressed by the fixed frame, which helps to ensure that the oxygen (or air) and hydrogen on both sides of the proton exchange membrane do not leak to each other, and ensure the normal operation and safety of the dehumidification structure; it can also ensure the stability of the structure and prevent water loss, etc. In other words, the dehumidification structure based on the proton exchange membrane of the present application has a compact structure, occupies a small space, and can achieve precise control in the micro-humidity range; and under low-voltage control, it can achieve rapid response and continuous dehumidification, thereby improving the dehumidification efficiency; and the system stability, durability and electrocatalytic performance of the dehumidification structure are good, which can stably ensure the stability of the dehumidification performance of the dehumidification structure; in addition, the dehumidification structure can also be adapted to various places to be dehumidified, and has a wide range of application scenarios.

[0027] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0029] Figure 1 The overall structural schematic diagram of an embodiment of a dehumidification structure based on a proton exchange membrane according to the present invention is shown;

[0030] Figure 2 A schematic structural diagram showing a fixing frame of an embodiment of a dehumidification structure based on a proton exchange membrane according to the present invention at a first viewing angle is shown;

[0031] Figure 3A schematic structural diagram of a fixing frame at a second viewing angle according to an embodiment of a proton exchange membrane-based dehumidification structure of the present invention is shown.

[0032] The above drawings include the following reference numerals:

[0033] 10. proton exchange membrane; 20. anode catalytic coating; 21. cathode catalytic coating; 30. first gas diffusion layer; 31. second gas diffusion layer; 40. first fixing frame; 41. second fixing frame; x, first direction. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0037] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0038] As mentioned in the background technology, in the prior art, the use of dehumidifiers for dehumidification has bottlenecks such as large vibration and noise, large space occupation, and difficulty in adapting to various microenvironments (such as display cabinets and transport boxes). In addition, the dehumidification equipment in the existing humidity control technology is complex, the humidity control accuracy is low, and there is a risk of refrigerant leakage. To this end, the present application proposes a dehumidification structure based on a proton exchange membrane and a device having the same, which can be adapted to a variety of usage scenarios and can achieve precise control of the humidity of the dehumidified environment and improve the dehumidification efficiency. The dehumidification structure based on a proton exchange membrane of the present application will be described in detail below in conjunction with the accompanying drawings.

[0039] See also Figures 1 to 3 As shown, the present invention provides a dehumidification structure based on a proton exchange membrane, and the dehumidification structure based on a proton exchange membrane includes: a proton exchange membrane 10, a gas diffusion layer and a fixing frame.

[0040] Specifically, the proton exchange membrane 10 includes a first side and a second side arranged opposite to the first side, the first side is provided with an anode catalytic coating 20, and the second side is provided with a cathode catalytic coating 21; the gas diffusion layer includes a first gas diffusion layer 30 and a second gas diffusion layer 31, the first gas diffusion layer 30 is arranged on the side of the anode catalytic coating 20 away from the proton exchange membrane 10, and the second gas diffusion layer 31 is arranged on the side of the cathode catalytic coating 21 away from the proton exchange membrane 10; the fixing frame includes a first fixing frame 40 and a second fixing frame 41, the first fixing frame 40 is arranged on the side of the first gas diffusion layer 30 away from the proton exchange membrane 10, and the second fixing frame 41 is arranged on the side of the second gas diffusion layer 31 away from the proton exchange membrane 10, the first fixing frame 40 and the second fixing frame 41 are arranged opposite to each other and press the first gas diffusion layer 30 and the second gas diffusion layer 31 toward the proton exchange membrane 10, and are fastened by a locking member (not shown in the figure) to form a sealing structure.

[0041] In the present application, the dehumidification module based on the proton exchange membrane includes a proton exchange membrane 10, and an anode catalytic coating 20 and a cathode catalytic coating 21 are respectively arranged on a first side and a second side opposite to the first side of the proton exchange membrane 10. In a low voltage mode, an oxygen evolution reaction occurs on the anode catalytic coating 20 to generate oxygen and hydrogen ions (2H 2 O-4e - →4H + +O 2 ), the hydrogen ions move toward the cathode side driven by the proton exchange membrane 10 and the voltage, and react with oxygen on the cathode catalytic coating 21 to generate water (4H + +O 2 →2H 2O), the generated water is discharged outside, thereby achieving dehumidification. A first gas diffusion layer 30 is arranged on the side of the anode catalytic coating 20 away from the proton exchange membrane 10, and a second gas diffusion layer 31 is arranged on the side of the cathode catalytic coating 21 away from the proton exchange membrane 10. The first gas diffusion layer 30 and the second gas diffusion layer 31 are both porous structures, so that the reaction gas can be evenly distributed. For example, the humid air can quickly penetrate into the anode catalytic coating 20 through the first gas diffusion layer 30 on the anode side, and the generated water and hydrogen can be smoothly discharged on the cathode side; in addition, the high porosity structure reduces the gas transmission resistance, avoids local concentration polarization, and improves the dehumidification efficiency. Further, a first fixing frame 40 is arranged on the side of the first gas diffusion layer 30 away from the proton exchange membrane 10, and a second fixing frame 41 is arranged on the side of the second gas diffusion layer 31 away from the proton exchange membrane 10, and the first fixing frame 40 and the second fixing frame 41 are arranged relative to each other and the first gas diffusion layer 30 and the second gas diffusion layer 31 are pressed toward the proton exchange membrane 10, and are fastened by a locking member to form a sealing structure. Among them, the first fixed frame 40 and the second fixed frame 41 play the role of supporting, sealing and fixing. The gas diffusion layer and the proton exchange membrane 10 are pressed tightly by the fixed frames, which helps to ensure that the oxygen (or air) and hydrogen on both sides of the proton exchange membrane 10 do not leak to each other, thereby ensuring the normal operation and safety of the dehumidification structure; it can also ensure the stability of the structure and prevent water loss.

[0042] That is to say, the proton exchange membrane-based dehumidification structure of the present application has a compact structure, occupies a small space, and can achieve precise control in the micro-humidity range; and under low-voltage control, it can achieve rapid response and continuous dehumidification, thereby improving the dehumidification efficiency; and the system stability, durability and electrocatalytic performance of the dehumidification structure are good, which can stably ensure the stability of the dehumidification performance of the dehumidification structure; in addition, the dehumidification structure can also be adapted to various places to be dehumidified, and has a wide range of application scenarios.

[0043] like Figure 1 As shown, along the first direction (i.e. Figure 1), the thickness of the proton exchange membrane 10 is [0.07, 0.3] mm, illustratively, the thickness of the proton exchange membrane 10 can be 0.07 mm, 0.18 mm and 0.25 mm, etc. The thickness of the proton exchange membrane 10 is not specifically limited in this application, and the thickness of the membrane can be selected according to the actual situation. A thinner membrane is conducive to the transmission of protons in the membrane to move faster through the membrane to the cathode, thereby achieving a more efficient dehumidification process and improving dehumidification efficiency. In addition, the membrane within the above range can reduce the resistance during proton transfer and reduce membrane resistance, so that during the operation of the dehumidification structure, the energy loss of the electrochemical reaction is smaller, which is conducive to improving the energy efficiency of the entire system. A certain thickness can also ensure that the proton exchange membrane 10 has sufficient mechanical strength and stability, so that it can withstand certain pressure and stress during the operation of the dehumidification structure, and is not prone to rupture or damage. The thickness of the anode catalytic coating 20 is [0.2, 0.8] mm. For example, the thickness of the anode catalytic coating 20 can be 0.2 mm, 0.3 mm, 0.5 mm, 0.7 mm, and 0.8 mm, etc. This application does not limit the specific thickness of the anode catalytic coating 20, which is determined according to actual production needs. The appropriate thickness of the anode catalytic coating 20 can optimize the reaction and provide sufficient catalytic sites so that the electrochemical reaction on the anode side can proceed fully; it can also promote electron conduction and ensure that there is a good conductive path in the coating so that the electrons generated by the anode reaction can be quickly transferred to the cathode side through the coating; it is also beneficial to enhance the bonding force. The appropriate thickness can enhance the bonding force between the coating and the electrode substrate and the proton exchange membrane 10, improve the stability of the coating during long-term use, and is not easy to fall off or be damaged, thereby ensuring the long-term stable operation of the dehumidification structure. The thickness of the cathode catalytic coating 21 is [0.1, 0.5] mm. For example, the thickness of the cathode catalytic coating 21 can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, and 0.5 mm, etc. The present application does not limit the specific thickness of the anode catalytic coating 20, which is determined according to actual production needs. The cathode catalytic coating 21 provides sufficient active sites for the reduction reaction on the cathode side, so that oxygen can quickly combine with protons and electrons, promote the related reactions, and help to form conditions on the cathode side that are conducive to water transmission; the appropriate thickness of the cathode catalytic coating 21 can ensure the catalytic activity required for the reaction, and will not hinder the transmission of substances such as protons, oxygen and water molecules, so that these substances can smoothly reach the inside of the catalyst layer for reaction; it also helps to reduce the overpotential of the cathode, reduce energy loss, and increase the electrochemical reaction rate of the entire dehumidification structure, so that the system can more effectively use electrical energy to achieve the dehumidification function. The thickness of the first gas diffusion layer 30 and the second gas diffusion layer 31 are both [0.2, 2] mm. For example, the thickness of both can be 0.2 mm, 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm, etc., and the specific thickness is not limited.A suitable gas diffusion layer is conducive to gas transmission and distribution. A thinner thickness is conducive to rapid diffusion of gas to the surface of the catalyst layer, so that the gas participating in the reaction can be more evenly distributed on the catalytic coating, improving the uniformity and efficiency of the reaction; when it is thicker, it can provide more gas storage space and transmission channels to ensure that under different working conditions, especially under complex working conditions such as high humidity, there is still enough gas supplied to the catalyst layer to maintain the stable progress of the dehumidification reaction; such a setting is also conducive to drainage and prevention of water accumulation, improving the dehumidification effect; it is also conducive to reducing mass transfer resistance and improving dehumidification efficiency; it is also conducive to electron conduction and support, providing electron channels for electrode reactions and ensuring that the catalytic coating will not be damaged by external forces during the dehumidification process. The thickness of the first fixed frame 40 and the second fixed frame 41 is [0.5,3] mm. For example, the thickness of both can be 0.5 mm, 1.0 mm, 2.0 mm, and 3.0 mm. The appropriate thickness of the fixed frame helps to stabilize and seal the structure, provide reliable support and fixation for the entire dehumidification structure and good sealing effect, improve the efficiency and stability of the dehumidification structure; it is also beneficial to enhance mechanical strength and protection, and ensure the stability and reliability of the structure.

[0044] In the present application, the proton exchange membrane 10 includes any one of a perfluorosulfonic acid proton exchange membrane, a partially fluorinated polymer membrane, a non-fluorinated polymer proton exchange membrane, and a composite proton exchange membrane. Among them, the perfluorosulfonic acid proton exchange membrane (i.e., Nafion membrane) has high proton conduction and water vapor transport capabilities, and its chemical and mechanical stability are good, which can ensure the reliability of the dehumidification effect; its surface characteristics make water vapor molecules easily adsorbed on the membrane surface and diffuse rapidly in the membrane, thereby improving the dehumidification efficiency. However, before using the membrane, it may be necessary to pre-treat some of the intake air in the environment that may interfere with the proton conduction and water vapor transport performance to improve the dehumidification effect. The partially fluorinated polymer membrane has moderate performance and relatively low cost, good hydrothermal stability, and adjustable performance to adapt to different working conditions. However, compared with the Nafion membrane, the membrane has relatively low proton conductivity, water vapor transport efficiency, and chemical stability, and cannot achieve the desired effect in high-demand dehumidification places. The production cost of non-fluoropolymer proton exchange membrane is relatively low, the environment is good, the chemical stability is good, and the water absorption rate is high. However, compared with Nafion membrane, the proton conductivity is limited, the mechanical strength is relatively low, and the dimensional stability is poor. The preparation process of composite proton exchange membrane is complicated, and the performance stability is uncertain. In summary, the preferred proton exchange membrane 10 of the present application is Nafion membrane, and it has a variety of models. In the present application, one of N115, N117, N1110 and NC700 can be selected to improve the dehumidification efficiency.

[0045] In the present application, the gas diffusion layer includes a nickel-plated stainless steel layer. The nickel-plated stainless steel layer has good electrical conductivity. Nickel itself has a high electrical conductivity. Plating on stainless steel can ensure that a good conductive channel is provided for electrochemical reactions in the dehumidification structure, which is conducive to proton transmission and related electrochemical reactions. The nickel-plated layer can effectively improve the corrosion resistance of stainless steel. Nickel can form a dense oxide film on the surface to prevent the internal stainless steel from contacting with external corrosive substances. In a dehumidification environment, especially when the treated gas contains a certain humidity and possible corrosive components, the structural stability can be well maintained. The nickel-plated stainless steel layer can achieve good gas diffusion and water vapor transmission performance through reasonable surface treatment and pore structure design, and can make the humid gas evenly distributed on the surface of the proton exchange membrane 10, which is conducive to dehumidification. At present, the process of nickel plating is mature, which can reduce the production cost of the entire dehumidification structure. The nickel-plated stainless steel layer also has high mechanical strength and hardness, and is not easy to deform and damage during actual work.

[0046] The commonly used gas diffusion layer in the prior art is titanium felt. Although titanium felt also has a certain degree of conductivity, its conductivity is relatively low compared to nickel-plated stainless steel, which may increase resistance, lead to energy loss, and affect dehumidification efficiency. In addition, titanium felt has good corrosion resistance under general conditions, but in certain specific humid gas environments that may contain impurities such as acids and alkalis, its corrosion resistance may not be as good as nickel-plated stainless steel, because the oxide film on the titanium surface may be destroyed by some specific substances. Although titanium felt has high porosity and large pore size, which is conducive to gas emission and liquid circulation, in the dehumidification structure based on proton exchange membrane, its pore size and pore structure may not be as accurate as the nickel-plated stainless steel layer in matching the requirements for gas diffusion and water vapor transmission during the dehumidification process, which may lead to uneven gas distribution and affect the dehumidification effect.

[0047] In the present application, the fixed frame includes a stainless steel frame or a copper metal frame. In the present application, the fixed frame can adopt a 304 stainless steel frame or a copper metal frame. Among them, the 304 stainless steel frame has good corrosion resistance, high strength and mechanical stability, good sealing, good thermal conductivity, low cost and easy processing and installation; while the copper metal frame has the characteristics of high thermal conductivity, excellent electrical conductivity, good flexibility and aesthetics. In the present application, the above two frames can be used to achieve conductivity, and the input and output of current can be achieved by directly connecting or welding with external wires, which can reduce the design of electrode sheets and reduce production costs. Of course, in other embodiments of the present application, the fixed frame can also adopt fixed frames of other materials. As long as it is a deformation under the conception of the present application, it is within the protection scope of the present application. In the present application, a DC power supply is used to provide power to a dehumidification structure based on a proton exchange membrane, wherein the DC voltage is 0.5V-3V. When the voltage is within the range of 0.5V-3V, the electric field strength can make protons move more effectively and directionally within the membrane, thereby accelerating the proton transfer speed and improving the proton conduction efficiency of the proton exchange membrane 10. When the voltage is within this range, the microstructure of the proton exchange membrane 10 will not be damaged by the strong electric field generated by the excessively high voltage, and the degradation or accelerated aging of the membrane material can be avoided, which is conducive to maintaining the stability and long-term service life of the proton exchange membrane 10, ensuring that the dehumidification structure can operate continuously and stably; it can also optimize the water transmission process and improve the overall dehumidification efficiency; it can also improve energy utilization efficiency, reduce operating costs, and reduce safety hazards.

[0048] Further, the locking member (not shown in the figure) includes any one of a bolt, a screw and a pin. In the present application, the fixing frame, the gas diffusion layer and the proton exchange membrane 10 provided with the anode catalytic coating 20 and the cathode catalytic coating 21 are compressed, sealed and fixed by a locking member, which helps to improve the sealing performance of the dehumidification structure and improve its dehumidification efficiency and dehumidification accuracy. In the present application, it is preferred to fix with bolts, and the bolt connection can ensure the stability of the structure; the pressure is evenly distributed, and the pressure is evenly applied on the contact surface of the fixing frame, the gas diffusion layer and the proton exchange membrane 10 so that it can fit tightly and achieve good sealing; the bolts are also easy to install and maintain, and can be flexibly adjusted to ensure that the dehumidification structure can better ensure the installation accuracy of each component during the assembly process, so as to improve the dehumidification efficiency of the dehumidification structure. In the dehumidification structure based on the proton exchange membrane, sealing is very important. Bolt tightening can enable the fixing frame to effectively compress the proton exchange membrane 10 and the gas diffusion layer, form a good sealing effect, prevent humid gas from leaking between the components, ensure the efficiency and stability of the dehumidification process, and thus improve the dehumidification performance. The bolts can also maintain the structural performance, avoid adverse effects on the material properties of the gas diffusion layer and the proton exchange membrane 10, and thus ensure the normal operation and dehumidification effect of the dehumidification structure.

[0049] In the present application, along the first direction, an air inlet channel (not shown in the figure) is provided on the side of the dehumidification structure close to the first fixed frame 40 and away from the proton exchange membrane 10, and the air inlet channel is connected to the room to be dehumidified. In this way, the air inlet channel can guide the indoor air to be dehumidified to the dehumidification structure, ensuring that the humid air can accurately reach the dehumidification components such as the proton exchange membrane 10; the air inlet channel can also evenly distribute the airflow to avoid airflow concentration in certain areas, thereby improving the uniformity and efficiency of air dehumidification by the proton exchange membrane 10; in addition, some preliminary filtering or pretreatment devices (not shown in the figure) can be provided in the air inlet channel to prevent impurities from entering the dehumidification structure and causing blockage or damage to components such as the proton exchange membrane 10, resulting in a reduction in the service life of the dehumidification structure. An exhaust channel (not shown in the figure) is provided on the side of the dehumidification structure close to the second fixed frame 41 and away from the proton exchange membrane 10, and the exhaust channel is connected to the outside and / or the room. A temperature sensor (not shown in the figure) and a humidity sensor (not shown in the figure) are usually set in the room to be dehumidified. An exhaust duct is set to discharge the air that has been dehumidified by the proton exchange membrane 10 out of the dehumidification structure so that it can return to the room or be discharged to the outside environment. If it is discharged to the room, the dryness of the indoor air can be increased and the indoor environmental humidity can be improved; if it is discharged to the outside, the humid air can be directly discharged to the outside to avoid accumulation in the room and causing increased humidity. The exhaust duct cooperates with the air inlet duct to maintain the airflow balance in the entire dehumidification structure. Ensure that there is enough air flowing through the proton exchange membrane 10 for dehumidification, while avoiding problems such as excessive pressure or poor airflow caused by air accumulation in the dehumidification structure, to ensure that the dehumidification process can be carried out continuously and stably.

[0050] In the present application, the anode catalytic coating 20 includes a mixed coating of platinum, ruthenium oxide, carbon powder and a first adhesive; or, the anode catalytic coating 20 includes a mixed coating of platinum, rhodium oxide, carbon powder and a first adhesive. Among them, platinum has excellent catalytic activity, can significantly reduce the activation energy of the anode reaction, and accelerate the reaction rate. In the dehumidification structure based on the proton exchange membrane, some redox reactions are involved to achieve the dehumidification function. Platinum can make these reactions proceed at a relatively low overpotential, improve the reaction efficiency, and thus improve the dehumidification effect. Ruthenium oxide or rhodium oxide also has good catalytic properties, and they cooperate with platinum to produce a synergistic effect. Taking ruthenium oxide as an example, it can provide additional active sites in some reactions, and promote specific chemical reactions together with platinum, making the entire catalytic process more efficient. For rhodium oxide, it can also work with platinum to optimize the catalytic reaction path and further enhance the catalytic effect. The carbon powder has good electrical conductivity and can form a conductive network in the anode catalytic coating 20, which helps to quickly transfer electrons between catalyst particles and between the catalyst and the electrode; this is crucial to maintaining the charge balance and electron transfer in the anode reaction, and can ensure the smooth progress of the catalytic reaction and improve the electrochemical performance of the entire dehumidification structure. The role of the first adhesive is to firmly combine components such as platinum, ruthenium oxide or rhodium oxide, and carbon powder to form a stable coating structure. It can provide good adhesion between different components, prevent the catalyst particles from falling off or agglomerating during use, and ensure that the catalytic coating remains intact and stable during long-term operation, thereby continuously exerting its catalytic effect. Under the premise of ensuring catalytic performance, the introduction of components such as ruthenium oxide or rhodium oxide and carbon powder can reduce the amount of platinum used, thereby reducing material costs.

[0051] Further, the mass ratio of platinum, ruthenium oxide, the first adhesive and carbon powder in the mixed coating is [1:5:1:1, 1:10:1:1]; or, the mass ratio of platinum, rhodium oxide, the first adhesive and carbon powder in the mixed coating is [1:5:1:1, 1:10:1:1]. In the present application, the mass ratio of platinum, rhodium oxide, the first adhesive and carbon powder in the mixed coating can be 1:5:1:1, 1:6:1:1, 1:8:1:1 and 1:10:1:1, etc. In the present application, the content of ruthenium oxide or rhodium oxide is relatively high, which can give full play to its synergistic catalytic effect with platinum, provide abundant active sites for the anode reaction, and accelerate the reaction process. The mass ratio of carbon powder to platinum is 1:1, which can provide dispersion support for platinum while ensuring good conductivity, so that platinum can better exert its catalytic activity and improve the overall electrochemical performance. The mass ratio of the first adhesive to platinum is 1:1, which can provide sufficient adhesion to firmly combine platinum, ruthenium oxide and carbon powder to form a stable coating structure, reduce the shedding or agglomeration of the components during use, and ensure the integrity and long-term stability of the catalytic coating. Further increasing the proportion of ruthenium oxide or rhodium oxide can further enhance the synergistic catalytic effect with platinum, maintain high catalytic activity under a wider range of reaction conditions, and help improve the adaptability and efficiency of the dehumidification structure in different environments. The proportion of ruthenium oxide or rhodium oxide increases, but the ratio of the first adhesive to carbon powder remains unchanged, which can still maintain the structural stability and conductivity of the coating, ensuring that while enhancing the catalytic performance, the physical and chemical properties of the entire coating remain balanced, allowing the dehumidification structure to operate stably. If the proportion of ruthenium oxide or rhodium oxide is too small, the catalytic activity may be insufficient, the dehumidification efficiency may be reduced, the electrode conductivity may be reduced, and the stability of the electrode may be reduced; if the proportion of ruthenium oxide or rhodium oxide is too high, the production cost may increase; if the proportion of ruthenium oxide or rhodium oxide is too high, the stability inside the dehumidification structure may be reduced and the catalytic activity may be excessive, which is not conducive to the stable operation of the system and the precise control of humidity. In the mixed coating, the specific process is to add platinum, rhodium oxide, the first adhesive and carbon powder according to the corresponding proportions, and then scrape them onto one side of the proton exchange membrane 10 to form the anode catalytic coating 20.

[0052] In the present application, the cathode catalytic coating 21 includes a mixed coating of platinum, graphene and a second adhesive. In the present application, platinum is a metal with excellent catalytic performance, which can significantly reduce the activation energy of the cathode reaction and accelerate the reaction rate. In the dehumidification structure, the reaction occurring at the cathode is crucial to the efficiency of the entire dehumidification process. The presence of platinum can make these reactions proceed at a relatively low overpotential, thereby improving the dehumidification effect. Graphene has excellent electrical properties, and its high conductivity can form an efficient electron transmission channel in the coating, which helps to quickly transfer electrons between catalyst particles and between catalysts and electrodes, thereby improving the electron transfer efficiency of the reaction. At the same time, there is a synergistic effect between graphene and platinum, which can optimize the electronic structure of the catalyst, further improve the catalytic activity of platinum, and promote each other in the catalytic reaction, thereby improving the overall catalytic performance. In addition, graphene has a large specific surface area, which can provide more attachment sites for platinum, so that platinum is evenly dispersed on the graphene surface, increasing the effective surface area of ​​platinum, thereby improving the utilization rate of the catalyst. More active sites mean that more catalytic reactions can be carried out at the same time, which helps to improve the catalytic efficiency of the cathode catalytic coating 21, and thus improve the performance of the entire dehumidification structure. The second adhesive plays the role of firmly combining platinum and graphene together and making the mixed coating firmly attached to the cathode surface. It can provide good adhesion between platinum and graphene particles, prevent them from falling off or agglomerating during use, and ensure that the catalytic coating remains intact and stable during long-term operation, thereby continuously exerting its catalytic effect. In addition, the adhesive can also fill the gaps in the coating, improve the density of the coating, reduce the erosion of the coating by substances such as electrolytes, and extend the service life of the coating.

[0053] Furthermore, the mass ratio of platinum, graphene and the second adhesive in the cathode catalytic coating 21 is [1:1:1, 1:1:5]. Exemplarily, in the present application, the mass ratio of platinum, graphene and the second adhesive in the cathode catalytic coating 21 can be 1:1:1, 1:1:2, 1:1:3, 1:1:4 and 1:1:5, etc. When the mass ratio of platinum, graphene and the second adhesive is 1:1:1, the three can initially form a good synergistic effect. As the proportion of the second adhesive increases, the components in the coating are more closely combined, which helps to maintain the stability of the catalytic active sites and give full play to the catalytic performance of platinum, thereby improving the cathode reaction efficiency and further improving the dehumidification effect. When the above components are within the above-mentioned ratio range, graphene, as an excellent conductive material, can ensure that the coating has good conductivity even when the proportion of the second adhesive increases, providing an effective channel for electron transmission. At the same time, the proportion of the second adhesive increases, which enhances the structural stability of the coating, making the coating less likely to fall off or be damaged during long-term use, thereby ensuring the reliability and durability of the dehumidification structure. However, if the proportion of the second adhesive is too high, it will reduce the conductivity, reduce the exposure of active sites, affect gas diffusion, and increase the brittleness of the cathode catalytic coating 21, ultimately leading to a reduction in the dehumidification performance and service life of the dehumidification structure. If the proportion of the second adhesive is too low, the structural stability of the coating may be poor and the catalyst may be lost; less adhesive cannot disperse and fix the platinum and graphene particles well, causing the particles to agglomerate, reducing the activity and reaction rate of the catalyst, thereby affecting the dehumidification performance, etc. In the present application, platinum, graphite and the second adhesive are mixed in a suitable mass ratio and then scraped onto the proton exchange membrane 10 to form the cathode catalytic coating 21.

[0054] Furthermore, the first adhesive and the second adhesive can be polyvinylidene fluoride (PVDF), epoxy resin, water-based polyurethane, etc. The above adhesives all have good adhesion, chemical stability, good film-forming properties, electrical insulation properties, and thermal stability. The specific choice of adhesive needs to be comprehensively considered based on the specific application scenario, performance requirements, and cost of the catalytic coating, and no specific requirements are made in this application.

[0055] In order to verify the influence of the mass ratio of the components in the anode catalytic coating 20 and the cathode catalytic coating 21 in the dehumidification structure based on the proton exchange membrane in the present application on the dehumidification efficiency, the present application provides the following specific examples and comparative examples:

[0056] Example 1

[0057] In this embodiment, the mass of platinum in the mixed coating of the anode catalytic coating 20 is 1g, the mass of ruthenium oxide is 5g, the mass of polyvinylidene fluoride is 1g and the mass of carbon powder is 1g. The mass ratio of platinum, ruthenium oxide, polyvinylidene fluoride and carbon powder in the mixed coating is 1:5:1:1. The dehumidification efficiency of the dehumidification structure is measured to be 30%.

[0058] Example 2

[0059] In the mixed coating in Example 2, the mass of platinum, the mass of polyvinylidene fluoride and the mass of carbon powder are basically the same as those in Example 1. The difference is that in this embodiment, the mass of ruthenium oxide is 6 g, and the mass ratio of platinum, ruthenium oxide, polyvinylidene fluoride and carbon powder in the mixed coating is 1:6:1:1. The dehumidification efficiency of the dehumidification structure is measured to be 34%.

[0060] Example 3

[0061] In the mixed coating in Example 3, the mass of platinum, the mass of polyvinylidene fluoride and the mass of carbon powder are basically the same as those in Example 1. The difference is that in this embodiment, the mass of ruthenium oxide is 7 g, and the mass ratio of platinum, ruthenium oxide, polyvinylidene fluoride and carbon powder in the mixed coating is 1:7:1:1. The dehumidification efficiency of the dehumidification structure is measured to be 46%.

[0062] Example 4

[0063] In the mixed coating in Example 4, the mass of platinum, the mass of polyvinylidene fluoride and the mass of carbon powder are basically the same as those in Example 1. The difference is that in this embodiment, the mass of ruthenium oxide is 8 g, and the mass ratio of platinum, ruthenium oxide, polyvinylidene fluoride and carbon powder in the mixed coating is 1:8:1:1. The dehumidification efficiency of the dehumidification structure is measured to be 48%.

[0064] Example 5

[0065] In the mixed coating in Example 5, the mass of platinum, the mass of polyvinylidene fluoride and the mass of carbon powder are basically the same as those in Example 1. The difference is that in this embodiment, the mass of ruthenium oxide is 9 g, and the mass ratio of platinum, ruthenium oxide, polyvinylidene fluoride and carbon powder in the mixed coating is 1:9:1:1. The dehumidification efficiency of the dehumidification structure is measured to be 50%.

[0066] Example 6

[0067] In the mixed coating in Example 6, the mass of platinum, the mass of polyvinylidene fluoride and the mass of carbon powder are basically the same as those in Example 1. The difference is that in this embodiment, the mass of ruthenium oxide is 10g, and the mass ratio of platinum, ruthenium oxide, polyvinylidene fluoride and carbon powder in the mixed coating is 1:10:1:1. The dehumidification efficiency of the dehumidification structure is measured to be 55%.

[0068] Example 7

[0069] In this embodiment, the mass of platinum in the mixed coating of the cathode catalytic coating 21 is 1g, the mass of graphene is 1g, and the mass of polyvinylidene fluoride is 1g. The mass ratio of platinum, graphene and polyvinylidene fluoride in the mixed coating is 1:1:1. The dehumidification efficiency of the dehumidification structure is measured to be 55%.

[0070] Example 8

[0071] In the mixed coating in Example 8, the mass of platinum and the mass of graphene are basically the same as those in Example 7. The difference is that in this embodiment, the mass of polyvinylidene fluoride is 2g, and the mass ratio of platinum, graphene and polyvinylidene fluoride in the mixed coating is 1:1:2. The dehumidification efficiency of the dehumidification structure is measured to be 51%.

[0072] Example 9

[0073] In the mixed coating in Example 9, the mass of platinum and the mass of graphene are basically the same as those in Example 7. The difference is that in this embodiment, the mass of polyvinylidene fluoride is 3g, and the mass ratio of platinum, graphene and polyvinylidene fluoride in the mixed coating is 1:1:3. The dehumidification efficiency of the dehumidification structure is measured to be 44%.

[0074] Example 10

[0075] In the mixed coating in Example 10, the mass of platinum and the mass of graphene are basically the same as those in Example 7. The difference is that in this embodiment, the mass of polyvinylidene fluoride is 4 g, and the mass ratio of platinum, graphene and polyvinylidene fluoride in the mixed coating is 1:1:4. The dehumidification efficiency of the dehumidification structure is measured to be 40%.

[0076] Embodiment 11

[0077] In the mixed coating in Example 11, the mass of platinum and the mass of graphene are basically the same as those in Example 7. The difference is that in this embodiment, the mass of polyvinylidene fluoride is 5g, and the mass ratio of platinum, graphene and polyvinylidene fluoride in the mixed coating is 1:1:5. The dehumidification efficiency of the dehumidification structure is measured to be 30%.

[0078] Comparative Example 1

[0079] In the mixed coating in Comparative Example 1, the mass of platinum, the mass of polyvinylidene fluoride and the mass of carbon powder are basically the same as those in Example 1. The difference is that in this example, the mass of ruthenium oxide is 1 g, and the mass ratio of platinum, ruthenium oxide, polyvinylidene fluoride and carbon powder in the mixed coating is 1:1:1:1. The dehumidification efficiency of the dehumidification structure is measured to be 10%.

[0080] Comparative Example 2

[0081] In the mixed coating in Comparative Example 2, the mass of platinum, the mass of polyvinylidene fluoride and the mass of carbon powder are basically the same as those in Example 1. The difference is that in this example, the mass of ruthenium oxide is 3 g, and the mass ratio of platinum, ruthenium oxide, polyvinylidene fluoride and carbon powder in the mixed coating is 1:3:1:1. The dehumidification efficiency of the dehumidification structure is measured to be 17%.

[0082] Comparative Example 3

[0083] In the mixed coating in Comparative Example 3, the mass of platinum, the mass of polyvinylidene fluoride and the mass of carbon powder are basically the same as those in Example 1. The difference is that in this example, the mass of ruthenium oxide is 12 g, and the mass ratio of platinum, ruthenium oxide, polyvinylidene fluoride and carbon powder in the mixed coating is 1:12:1:1. The dehumidification efficiency of the dehumidification structure is measured to be 54%.

[0084] Comparative Example 4

[0085] In the mixed coating in Comparative Example 4, the mass of platinum, the mass of polyvinylidene fluoride and the mass of carbon powder are basically the same as those in Example 1. The difference is that in this example, the mass of ruthenium oxide is 15 g, and the mass ratio of platinum, ruthenium oxide, polyvinylidene fluoride and carbon powder in the mixed coating is 1:15:1:1. The dehumidification efficiency of the dehumidification structure is measured to be 55%.

[0086] Comparative Example 5

[0087] In the mixed coating in Comparative Example 5, the mass of platinum and the mass of graphene are basically the same as those in Example 7. The difference is that in this example, the mass of polyvinylidene fluoride is 0.5 g, and the mass ratio of platinum, graphene and polyvinylidene fluoride in the mixed coating is 1:1:0.5. The dehumidification efficiency of the dehumidification structure is measured to be 13%.

[0088] Comparative Example 6

[0089] In the mixed coating in Comparative Example 6, the mass of platinum and the mass of graphene are basically the same as those in Example 7. The difference is that in this example, the mass of polyvinylidene fluoride is 0.7 g, and the mass ratio of platinum, graphene and polyvinylidene fluoride in the mixed coating is 1:1:0.7. The dehumidification efficiency of the dehumidification structure is measured to be 24%.

[0090] Comparative Example 7

[0091] In the mixed coating in Comparative Example 7, the mass of platinum and the mass of graphene are basically the same as those in Example 7. The difference is that in this example, the mass of polyvinylidene fluoride is 7 g, and the mass ratio of platinum, graphene and polyvinylidene fluoride in the mixed coating is 1:1:7. The dehumidification efficiency of the dehumidification structure is measured to be 11%.

[0092] Comparative Example 8

[0093] In the mixed coating in Comparative Example 8, the mass of platinum and the mass of graphene are basically the same as those in Example 7. The difference is that in this example, the mass of polyvinylidene fluoride is 10 g, and the mass ratio of platinum, graphene and polyvinylidene fluoride in the mixed coating is 1:1:10. The dehumidification efficiency of the dehumidification structure is measured to be 2%.

[0094] Table 1

[0095]

[0096]

[0097] Table 2

[0098] Serial number Platinum / g Graphene / g Polyvinylidene fluoride / g Quality Ratio Dehumidification efficiency / % Example 7 1 1 1 1:1:1 55 Example 8 1 1 2 1:1:2 54 Example 9 1 1 3 1:1:3 44 Example 10 1 1 4 1:1:4 40 Embodiment 11 1 1 5 1:1:5 30 Comparative Example 5 1 1 0.5 1:1:0.5 13 Comparative Example 6 1 1 0.7 1:1:0.7 24 Comparative Example 7 1 1 7 1:1:7 11 Comparative Example 8 1 1 10 1:1:10 2

[0099] According to Table 1: By comparing Examples 1 to 6, it can be seen that when the mass ratio of the components in the cathode catalytic coating 21 remains unchanged and the mass of platinum, polyvinylidene fluoride and carbon powder in the mixed coating of the anode catalytic coating 20 remains unchanged, and the mass ratio of platinum, ruthenium oxide, polyvinylidene fluoride and carbon powder in the mixed coating is in the range of [1:5:1:1, 1:10:1:1], as the mass of ruthenium oxide increases, the dehumidification efficiency of the dehumidification structure based on the proton exchange membrane gradually increases.

[0100] By comparing Examples 1 to 6 and Comparative Examples 1 to 4, it can be seen that when the mass ratio of the components in the cathode catalytic coating 21 remains unchanged and the mass ratio of platinum, ruthenium oxide, polyvinylidene fluoride and carbon powder in the mixed coating of the anode catalytic coating 20 is less than 1:5:1:1, the dehumidification efficiency of the dehumidification structure is relatively small; and when the mass ratio of platinum, ruthenium oxide, polyvinylidene fluoride and carbon powder in the mixed coating is greater than 1:10:1:1, the dehumidification efficiency of the dehumidification structure changes less within a range.

[0101] According to Table 2: By comparing Examples 7 to 11, it can be seen that when the mass ratio of the components in the anode catalytic coating 20 remains unchanged, and the masses of platinum and graphene in the mixed coating of the cathode catalytic coating 21 remain unchanged, and the mass ratio of platinum, graphene and polyvinylidene fluoride in the mixed coating is in the range of [1:1:1,1:1:5], as the mass of polyvinylidene fluoride increases, the dehumidification efficiency of the dehumidification structure gradually decreases.

[0102] By comparing Examples 7 to 11 and Comparative Examples 5 to 8, it can be seen that when the mass ratio of the components in the anode catalytic coating 20 remains unchanged and the mass ratio of platinum, graphene and polyvinylidene fluoride in the mixed coating of the cathode catalytic coating 21 is less than 1:1:1, the dehumidification efficiency of the dehumidification structure is less than the dehumidification efficiency within [1:1:1, 1:1:5], and the dehumidification efficiency gradually increases with the increase of the mass of polyvinylidene fluoride; and when the mass ratio of platinum, graphene and polyvinylidene fluoride in the mixed coating of the cathode catalytic coating 21 is greater than 1:1:5, the dehumidification efficiency of the dehumidification structure is less than the dehumidification efficiency within [1:1:1, 1:1:5], and the dehumidification efficiency gradually decreases with the increase of the mass of polyvinylidene fluoride.

[0103] Specifically, the above situation occurs on the anode catalytic coating 20. If the proportion of ruthenium oxide is small, the catalytic active sites provided are limited, and the demand for oxygen evolution reaction cannot be met, resulting in a slowdown in the rate of oxygen evolution reaction, thereby affecting the reaction of the cathode, and ultimately resulting in a decrease in dehumidification efficiency. If the quality of ruthenium oxide is too low, the coating may not be able to form a stable catalytic structure, and it is prone to problems such as shedding and breakage. This will reduce the effective area of ​​the anode catalytic coating 20, further reduce the efficiency of the oxygen evolution reaction, and affect the dehumidification effect. If the quality of ruthenium oxide is too high, the rate of oxygen evolution reaction will be too fast. This may cause the local potential near the anode to be too high, triggering some side reactions, such as the decomposition of the electrolyte. Side reactions consume the electrolyte in the electrolytic cell, reduce the amount of material involved in the main reaction (electrolysis of water), and thus reduce the overall dehumidification efficiency. In addition, too much ruthenium oxide will make the structure of the anode catalytic coating 20 more compact and the gas diffusion channel narrower. The generated oxygen is difficult to escape quickly from the coating, and a gas film will be formed on the surface of the coating, hindering subsequent water molecules from reaching the anode catalytic site, causing the rate of oxygen evolution reaction to gradually decrease, thereby affecting the dehumidification efficiency. In this embodiment, the proportion of ruthenium oxide is higher than the optimal range, and the dehumidification efficiency does not change much compared with the dehumidification efficiency of the added amount of ruthenium oxide within the optimal range. The reason for this phenomenon may be due to experimental errors, limitations of test conditions, or synergistic effects between other components or structures, etc., which needs to be further explored through experiments.

[0104] The above situation on the cathode catalytic coating 21 is mainly due to the fact that if the proportion of polyvinylidene fluoride is too low on the cathode catalytic coating 21, the structural stability of the coating may be poor and the catalyst may be lost; less adhesive cannot disperse and fix the platinum and graphene particles well, causing the particles to agglomerate, reducing the activity and reaction rate of the catalyst, thereby affecting the dehumidification performance, etc. If the proportion of polyvinylidene fluoride is too high, it will reduce the conductivity, reduce the exposure of active sites, affect gas diffusion, and increase the brittleness of the cathode catalytic coating 21, ultimately resulting in reduced dehumidification performance and service life of the dehumidification structure.

[0105] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0106] The present application achieves dehumidification by scraping an anode catalytic coating 20 with a mass ratio of [1:5:1:1, 1:10:1:1] of platinum, ruthenium oxide, polyvinylidene fluoride and carbon powder on one side of a proton exchange membrane 10 and scraping a cathode catalytic coating 21 with a mass ratio of [1:1:1, 1:1:5] of platinum, graphene and polyvinylidene fluoride on the other side of the proton exchange membrane 10, and arranging a gas diffusion layer on the side of the coating away from the proton exchange membrane 10, and then pressing and fixing the gas diffusion layer, the coating and the proton exchange membrane 10 with a fixing frame, causing water to undergo oxygen evolution reaction on the anode side under the action of a DC power supply, and generating water on the cathode side which is discharged outdoors or used for humidity regulation in an overly dry room. The dehumidification structure can improve the dehumidification efficiency of the room to be dehumidified and can precisely control the indoor humidity.

[0107] Recombination Figures 1 to 3 As shown, on the other hand, the present application also provides a device, which includes the above-mentioned proton exchange membrane-based dehumidification structure. Exemplarily, the device can be one of a dehumidifier, a dehumidifying dryer, a dust-proof dehumidification structure for a distribution box, and a moisture-proof cabinet. The device uses the above-mentioned proton exchange membrane-based dehumidification structure, and the device can set a dehumidification structure of appropriate size according to the actual location, so as to accurately control the humidity in the room to be dehumidified and improve the dehumidification efficiency.

[0108] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0109] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0110] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the structure or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0111] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dehumidification structure based on proton exchange membrane, characterized in that: include: A proton exchange membrane (10), the proton exchange membrane (10) comprising a first side and a second side arranged opposite to the first side, the first side being provided with an anode catalytic coating (20), and the second side being provided with a cathode catalytic coating (21); A gas diffusion layer, the gas diffusion layer comprising a first gas diffusion layer (30) and a second gas diffusion layer (31), the first gas diffusion layer (30) being arranged on a side of the anode catalytic coating (20) away from the proton exchange membrane (10), and the second gas diffusion layer (31) being arranged on a side of the cathode catalytic coating (21) away from the proton exchange membrane (10); A fixing frame, the fixing frame comprising a first fixing frame (40) and a second fixing frame (41), the first fixing frame (40) being arranged on a side of the first gas diffusion layer (30) away from the proton exchange membrane (10), the second fixing frame (41) being arranged on a side of the second gas diffusion layer (31) away from the proton exchange membrane (10), the first fixing frame (40) and the second fixing frame (41) being arranged opposite to each other and pressing the first gas diffusion layer (30) and the second gas diffusion layer (31) toward the proton exchange membrane (10), and being fastened by a locking member to form a sealing structure.

2. The dehumidification structure based on proton exchange membrane according to claim 1, characterized in that: Along the first direction, the thickness of the proton exchange membrane (10) is [0.07, 0.3] mm; and / or, The thickness of the anode catalytic coating (20) is [0.2, 0.8] mm; and / or, The thickness of the cathode catalytic coating (21) is [0.1, 0.5] mm; and / or, The thickness of the first gas diffusion layer (30) and the second gas diffusion layer (31) are both [0.2, 2] mm; and / or, The thickness of the first fixing frame (40) and the second fixing frame (41) are both [0.5, 3] mm.

3. The dehumidification structure based on proton exchange membrane according to claim 1, characterized in that: The proton exchange membrane (10) comprises any one of a perfluorosulfonic acid proton exchange membrane, a partially fluorinated polymer membrane, a non-fluorinated polymer proton exchange membrane and a composite proton exchange membrane.

4. The dehumidification structure based on proton exchange membrane according to claim 1, characterized in that: The first gas diffusion layer (30) and the second gas diffusion layer (31) both comprise nickel-plated stainless steel layers.

5. The dehumidification structure based on proton exchange membrane according to claim 1, characterized in that: The first fixing frame (40) and the second fixing frame (41) both comprise stainless steel frames or copper metal frames.

6. The dehumidification structure based on proton exchange membrane according to claim 1, characterized in that: The locking member includes any one of a bolt, a screw and a pin.

7. The dehumidification structure based on a proton exchange membrane according to any one of claims 1 to 6, characterized in that: Along the first direction, an air inlet channel is provided on a side of the dehumidification structure close to the first fixing frame (40) and away from the proton exchange membrane (10), and the air inlet channel is connected to the room to be dehumidified. An air exhaust channel is provided on a side of the dehumidification structure close to the second fixing frame (41) and away from the proton exchange membrane (10), and the air exhaust channel is connected to the outside and / or the room.

8. The dehumidification structure based on proton exchange membrane according to claim 1, characterized in that: The anode catalytic coating (20) comprises a mixed coating of platinum, ruthenium oxide, carbon powder and a first adhesive; or, The anode catalytic coating (20) comprises a mixed coating of platinum, rhodium oxide, carbon powder and a first adhesive.

9. The dehumidification structure based on proton exchange membrane according to claim 8, characterized in that: The mass ratio of the platinum, the ruthenium oxide, the first adhesive and the carbon powder in the mixed coating is [1:5:1:1, 1:10:1:1]; or, The mass ratio of the platinum, the rhodium oxide, the first adhesive and the carbon powder in the mixed coating is [1:5:1:1, 1:10:1:1].

10. The dehumidification structure based on proton exchange membrane according to claim 1, characterized in that: The cathode catalytic coating (21) comprises a mixed coating of platinum, graphene and a second adhesive.

11. The dehumidification structure based on proton exchange membrane according to claim 10, characterized in that: The mass ratio of the platinum, the graphene and the second adhesive in the cathode catalytic coating (21) is [1:1:1, 1:1:5].

12. A device, characterized in that: The device comprises the proton exchange membrane-based dehumidification structure according to any one of claims 1 to 11.

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