Lightweight electrolysis cell applied to hydrogen production by alkaline electrolysis of water

Abstract

The application discloses a light-weight electrolysis cell applied to hydrogen production by alkaline electrolysis of water, which comprises mutually matched and assembled anode plates, anode electrodes, anode frames, diaphragms, cathode frames, cathode electrodes and cathode plates; the central regions of the anode plates and the cathode plates are provided with square-cornered plate bosses, and a plurality of hemispherical papillary structures are arranged on the plate bosses to form an alkali solution flow field; the anode electrodes and the cathode electrodes are attached to the corresponding anode plates and cathode plates to conduct current; the anode frames and the cathode frames are embedded in the corresponding anode electrodes and cathode electrodes to provide structural support; the diaphragms are arranged between the anode electrodes and the cathode electrodes as isolation layers to prevent gas mixing and allow electrolyte to pass through. The light-weight electrolysis cell realizes light weight, miniaturization and low cost, improves hydrogen production efficiency and the flexibility of the whole system, and is widely applicable in various scenes such as renewable energy integration and mobile hydrogen production equipment.

Description

Technical Field

[0001] This invention relates to the field of alkaline water electrolysis for hydrogen production, and more specifically to a lightweight electrolysis chamber for alkaline water electrolysis for hydrogen production. Background Technology

[0002] Alkaline water electrolysis for hydrogen production is an effective driving force for achieving green energy transformation. It lays the foundation for building a sustainable and resilient future energy system by efficiently utilizing renewable energy, promoting emission reduction in multiple industries, empowering clean energy transportation, optimizing energy storage and supply-demand balance, and strengthening emergency energy supply.

[0003] In existing water electrolysis hydrogen production technologies, traditional electrolyzers are typically made of metallic materials (such as stainless steel or carbon steel), resulting in heavy and bulky equipment. This not only increases the difficulty and cost of transportation and installation but also limits their flexibility in distributed energy systems, mobile platforms, or applications in confined spaces. Furthermore, the fabrication of the electrode plates may involve complex machining and welding processes, which are not only time-consuming but also costly, hindering the large-scale commercialization of electrolyzers.

[0004] In traditional electrolytic cell designs, the flow field layout may not be optimized, leading to uneven electrolyte flow and the potential presence of eddies in certain areas. This increases contact resistance, reduces current density, and consequently affects electrolysis efficiency. Furthermore, the thermal conductivity of metallic materials can complicate temperature control within the electrolytic cell, impacting the stability of the electrolysis process.

[0005] Furthermore, traditional electrolyzers often have a relatively enclosed structure, requiring the entire system to be disassembled and inspected when problems arise. This is not only time-consuming and costly, but also hinders routine maintenance and subsequent technological upgrades. For the integration and utilization of renewable energy, traditional large-scale electrolyzers are not responsive enough and cannot effectively match the fluctuations in energy output from solar and wind power, thus affecting the maximization of renewable energy utilization.

[0006] Therefore, how to design a lightweight electrolysis chamber for alkaline water electrolysis to produce hydrogen, and optimize the alkaline water electrolysis hydrogen production scheme by reducing weight, lowering costs, optimizing flow field design, simplifying maintenance procedures, and enhancing system flexibility, is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] In view of this, the present invention provides a lightweight electrolysis chamber for alkaline water electrolysis hydrogen production. By reducing weight, lowering costs, optimizing flow field design, simplifying maintenance procedures, and enhancing system flexibility, it brings significant improvements to alkaline water electrolysis hydrogen production technology. It is particularly suitable for renewable energy integration, mobile hydrogen production equipment, and scenarios with strict requirements for installation space.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A lightweight electrolysis chamber for producing hydrogen through alkaline water electrolysis includes: an anode plate, an anode electrode, an anode frame, a diaphragm, a cathode frame, a cathode electrode, and a cathode plate that are assembled together.

[0010] The anode plate and cathode plate, serving as the active surfaces for the electrochemical reaction, are respectively placed at one end and the other end of the electrolysis chamber; the central region of the anode plate and cathode plate is provided with rounded square plate protrusions, and the plate protrusions are provided with several hemispherical papillary structures to form an alkaline flow field;

[0011] The anode electrode and cathode electrode are attached to the corresponding anode plate and cathode plate to conduct current.

[0012] The anode and cathode frames are embedded in the corresponding anode and cathode electrodes, providing structural support;

[0013] The diaphragm is placed between the anode and cathode electrodes as an isolation layer to prevent gas mixing and allow electrolyte to pass through.

[0014] Preferably, the anode plate and the cathode plate are provided with a first screw hole, and the anode frame and the cathode frame are provided with a second screw hole and a third screw hole; the first screw hole and the second screw hole are provided correspondingly.

[0015] Preferably, the anode plate, anode frame, cathode frame, and cathode plate are fixedly connected by bolts based on the first screw hole and the second screw hole.

[0016] Preferably, the anode frame and the cathode frame are connected by bolts based on the third screw hole.

[0017] Preferably, the anode frame and the cathode frame are provided with sealing gasket grooves for fixing the diaphragm by means of sealing gaskets.

[0018] Preferably, the anode plate and cathode plate adopt a gradient polymer composite material structure, including: the rounded square plate boss in the central region is made of carbon fiber reinforced polytetrafluoroethylene; and the edge region is made of glass fiber reinforced polypropylene.

[0019] Preferably, the surfaces of the anode and cathode plates are plasma-treated and coated with an anti-corrosion coating.

[0020] Preferably, the papillary structure is incorporated with a self-cleaning coating assembly; the coating assembly includes a base coating and a superhydrophobic coating.

[0021] Preferably, it includes: an anode gas-liquid inlet and a cathode gas-liquid inlet respectively located on the anode side and cathode side of the top of the electrolysis chamber; the anode gas-liquid inlet and the cathode gas-liquid inlet are integrated with flow self-regulating valves.

[0022] Preferably, it includes: an anode gas-liquid outlet and a cathode gas-liquid outlet respectively located at the bottom of the electrolysis chamber on the anode side and the cathode side; the anode gas-liquid outlet and the cathode gas-liquid outlet are integrated into a gas-liquid separation structure.

[0023] As can be seen from the above technical solutions, compared with the prior art, the technical solutions of the present invention have the following advantages:

[0024] Beneficial effects:

[0025] 1. The independent design of the electrolysis chamber facilitates individual maintenance and upgrades without the need for large-scale disassembly of the entire electrolysis cell. This greatly simplifies the maintenance process, shortens downtime, and reduces transportation, installation, and maintenance costs. It also makes the equipment more portable and easier to deploy flexibly in different locations.

[0026] 2. The design of the electrode plate simplifies the production process, avoiding the complex processes of cutting and welding the outer ring, shaping and middle electrode plates of the traditional electrode plate frame, and improves the structural stability and fatigue strength of the electrode plate, thus extending its service life.

[0027] 3. The electrode surface is provided with unique rounded square electrode protrusions, on which hemispherical nipple structures are arranged. This increases the flow field area of ​​the electrolyte, making the alkaline solution flow more uniformly and smoothly. Moreover, by reducing the eddies in the flow channel, the contact resistance is reduced, thereby improving the current density and electrolysis efficiency. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the lightweight electrolysis chamber structure provided in an embodiment of the present invention;

[0030] Figure 2 This is a top view of the lightweight electrolysis chamber structure provided in an embodiment of the present invention;

[0031] Among them, 1-anode plate, 2-anode electrode, 3-anode frame, 4-diaphragm, 5-cathode frame, 6-cathode electrode, 7-cathode plate, 8-plate boss, 9-protrusion structure, 10-first screw hole, 11-second screw hole, 12-third screw hole, 13-sealing gasket groove, 14-anode gas-liquid inlet, 15-anode gas-liquid outlet, 16-cathode gas-liquid inlet, 17-cathode gas-liquid outlet. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] like Figure 1 As shown, this embodiment provides a lightweight electrolysis chamber for alkaline water electrolysis to produce hydrogen, comprising: an anode plate 1, an anode electrode 2, an anode frame 3, a diaphragm 4, a cathode frame 5, a cathode electrode 6, and a cathode plate 7 assembled together.

[0034] The anode plate 1 and cathode plate 7, as active surfaces for the electrochemical reaction, are respectively placed at one end and the other end of the electrolysis chamber; the central region of the anode plate 1 and cathode plate 7 is provided with a rounded square plate protrusion 8, and the plate protrusion 8 is provided with several hemispherical nipple structures 9 to form an alkaline flow field.

[0035] The anode electrode 2 and cathode electrode 6 are attached to the corresponding anode plate 1 and cathode plate 7 for current conduction.

[0036] The anode frame 3 and cathode frame 5 are embedded in the corresponding anode electrode 2 and cathode electrode 6, providing structural support;

[0037] The diaphragm 4 serves as an isolation layer between the anode electrode 2 and the cathode electrode 6, preventing gas mixing while allowing electrolyte passage. An enhanced ion exchange membrane with high ionic conductivity and mechanical strength is employed to improve electrolysis efficiency and extend service life. Simultaneously, a microporous structure is integrated on the diaphragm surface to optimize electrolyte permeability.

[0038] The aforementioned lightweight electrolysis cell achieves lightweighting, miniaturization, and low cost through structural innovation and material selection, improving hydrogen production efficiency and overall system flexibility. It can be widely applied to various demanding scenarios such as renewable energy integration and mobile hydrogen production equipment.

[0039] In this embodiment, the anode plate 1 and the cathode plate 7 are provided with a first screw hole 10, and the anode frame 3 and the cathode frame 5 are provided with a second screw hole 11 and a third screw hole 12; the first screw hole 10 and the second screw hole 11 are provided correspondingly.

[0040] The anode plate 1, anode frame 3, cathode frame 5, and cathode plate 7 are fixedly connected by bolts based on the first screw hole 10 and the second screw hole 11.

[0041] The anode frame 3 and the cathode frame 5 are connected by bolts based on the third screw hole 12.

[0042] The screw hole design simplifies the assembly process, allowing each component to be quickly connected using standardized fasteners, reducing assembly error rates and improving production efficiency. This is extremely advantageous for large-scale production and on-site maintenance, as it reduces assembly time and labor costs. When the electrolysis cell requires maintenance or component replacement, the screw hole-fixed structure allows for rapid disassembly, facilitating targeted replacement of damaged or aging components without requiring complete disassembly of the electrolysis cell, thus saving time and reducing maintenance costs.

[0043] It demonstrates significant technical advantages in ensuring the structural stability of the electrolysis chamber, simplifying the assembly process, facilitating maintenance and repair, enhancing sealing performance, and supporting modular design, playing an important role in improving the overall performance and practicality of alkaline water electrolysis hydrogen production equipment.

[0044] In this embodiment, the anode frame 3 and cathode frame 5 are provided with sealing gasket grooves 13 for fixing the diaphragm 4 by means of sealing gaskets. This is intended to ensure the positioning and sealing of the diaphragm within the electrolysis chamber. This improves the stability of the diaphragm, prevents electrolyte leakage in non-electrolysis areas, and maintains close contact between the diaphragm and the electrode plates, thus optimizing electrolysis efficiency.

[0045] In the design of the lightweight electrolysis chamber, to ensure the sealing and isolation effect during the electrochemical reaction process, several sealing gaskets are also present, which are placed at the following key interfaces:

[0046] Between anode plate 1 and anode electrode 2, between anode frame 3 and diaphragm 4, between diaphragm 4 and cathode frame 5, and between cathode electrode 6 and cathode plate 7;

[0047] Each sealing gasket independently bears the responsibility of maintaining the seal between adjacent structures, thus forming multiple strictly isolated electrochemical reaction chambers within the electrolysis chamber. This ensures efficient current transfer and effective gas separation during electrolysis, improving the overall system reliability and efficiency.

[0048] The anode plate 1 and the cathode plate 7 adopt a gradient polymer composite material structure, including:

[0049] The rounded square electrode protrusions 8 in the central area are made of carbon fiber reinforced polytetrafluoroethylene (PTFE); they have extremely high chemical corrosion resistance, especially excellent resistance to alkaline electrolytes. The addition of carbon fiber significantly improves the mechanical strength and thermal stability of the material, enabling the central area to withstand the mechanical stress and thermal effects generated during electrolysis, thus extending the service life of the electrode.

[0050] The edge area is made of glass fiber reinforced polypropylene. The addition of glass fiber improves the rigidity and impact resistance of the edge area. At the same time, polypropylene itself has good insulation and lightweight properties. This combination ensures the stability of the edge structure while reducing the overall weight, making it easier to install and maintain.

[0051] The gradient material design takes into account the uneven heat distribution that may be generated during electrolysis. The central area (the part with a higher operating temperature) uses polytetrafluoroethylene with low thermal conductivity, which helps maintain the operating temperature of the electrolyte, while the polypropylene in the edge area helps the overall heat diffusion. This design is beneficial for controlling the temperature inside the electrolysis chamber and maintaining a highly efficient electrolysis reaction.

[0052] Furthermore, the gradient design ensures that the material properties of each part of the electrode plate are matched with the stress it bears, guaranteeing both the strength and rigidity of the overall structure while avoiding the weight increase caused by over-design. This ensures the reliability and stability of the electrolysis chamber during long-term operation. This gradient polymer composite material structure design improves the overall performance of the electrolysis chamber, including durability, thermal management, cost efficiency, structural reliability, and environmental adaptability, providing strong support for the development of alkaline water electrolysis for hydrogen production technology.

[0053] In this embodiment, the surfaces of the anode plate 1 and the cathode plate 7 are treated with plasma and coated with an anti-corrosion coating.

[0054] Plasma bombardment roughens the microstructure of the electrode surface, increasing the surface area and thus improving the adhesion of subsequent coatings to the substrate. The application of an anti-corrosion coating provides a protective barrier for the electrode, effectively preventing alkaline substances in the electrolyte from eroding the electrode material. This is particularly beneficial for polymer electrode materials, significantly improving their corrosion resistance during long-term electrolysis, reducing performance degradation and structural damage caused by corrosion, and ultimately extending the overall service life of the electrolysis chamber.

[0055] The smooth and highly active surface after plasma treatment, along with the low impedance characteristics of the anti-corrosion coating, work together during the electrolysis process to effectively reduce the contact resistance of the electrode surface, promote electron transport, improve current efficiency, and thus enhance the rate and efficiency of hydrogen production by electrolysis.

[0056] In this embodiment, the papillary structure 9 is incorporated with a self-cleaning coating assembly; the coating assembly includes a base coating and a superhydrophobic coating.

[0057] In this embodiment, the specific process of combining the papillary structure (9) with the self-cleaning coating assembly includes:

[0058] Nanostructure Construction: The surface of the papillary structure (9) is precisely processed using chemical vapor deposition (CVD), physical vapor deposition (PVD), electrodeposition, sol-gel method, and template replication method to form a rough surface structure with micro- and nano-scale. These tiny protrusions mimic the microscopic morphology of the lotus leaf surface, significantly increasing the surface roughness. This allows liquids such as electrolytes to form a larger contact angle when in contact with the surface, making it less prone to adhesion and easier to roll in a spherical shape, carrying away contaminants and achieving a self-cleaning effect.

[0059] Hydrophobic coating: A hydrophobic coating composed of fluorinated polymers is applied onto the constructed micro / nanostructure. This coating is applied to the papillary structure via spraying, dipping, or spin coating to enhance the surface's hydrophobic properties and further reduce liquid adhesion and deposit accumulation.

[0060] To further enhance hydrophobicity and durability, compounds containing hydrophobic functional groups (such as fluorine and silicon groups) are introduced during the coating process, and surface modification is performed using plasma treatment. This alters the chemical properties of the coating surface, introducing more hydrophobic groups and ensuring that the coating maintains high hydrophobicity and resistance to environmental corrosion even during long-term electrolytic operations.

[0061] Furthermore, a composite coating strategy is adopted. The bottom layer is a base coating, which provides better mechanical strength and high adhesion to the substrate, ensuring a tight bond between the coating and the electrode plate. The top layer is a superhydrophobic coating, which enhances the surface's hydrophobicity and self-cleaning performance, maintaining excellent performance even in the high-temperature and alkaline environment of the electrolysis chamber, thus extending the equipment's service life.

[0062] All coating materials are carefully selected and rigorously tested to ensure that they maintain chemical stability under the harsh conditions of high temperature and strong alkalinity in the electrolysis chamber, preventing the coating from failing due to long-term corrosion by the electrolyte, effectively addressing various challenges in the electrolysis process, and ensuring the long-term, efficient, and stable operation of the equipment.

[0063] This papillary structure, combined with the design of a self-cleaning coating component, through multi-level structural optimization and material selection, not only significantly improves the self-cleaning capability of the electrolysis chamber, but also effectively increases the equipment's working efficiency and reduces maintenance requirements, providing a more efficient, environmentally friendly, and durable solution for alkaline water electrolysis hydrogen production technology.

[0064] like Figure 2As shown, the aforementioned lightweight electrolysis chamber further includes: an anode gas-liquid inlet 14 and a cathode gas-liquid inlet 16 respectively located on the anode side and cathode side of the top of the electrolysis chamber; the anode gas-liquid inlet 14 and the cathode gas-liquid inlet 16 are integrated with flow self-regulating valves.

[0065] And an anode gas-liquid outlet 15 and a cathode gas-liquid outlet 17 respectively located at the bottom of the electrolysis chamber on the anode side and the cathode side; the anode gas-liquid outlet 15 and the cathode gas-liquid outlet 17 are integrated into a gas-liquid separation structure.

[0066] The integrated flow self-regulating valve enables the electrolysis chamber to automatically adjust the alkali solution flow rate. It can automatically adjust the alkali solution supply based on the actual chemical reaction rate and changes in external conditions (such as temperature and pressure fluctuations) during electrolysis, ensuring efficient and stable operation of the electrolysis process.

[0067] The integrated gas-liquid separation structure is designed at the bottom outlet of the electrolysis chamber, which can effectively separate the generated hydrogen and oxygen from the electrolyte, ensuring the purity of the gas products and improving the collection efficiency of hydrogen and oxygen.

[0068] In addition, gas-liquid separation reduces the amount of liquid droplets carried in the gas, preventing blockage and corrosion of downstream gas processing equipment and extending the overall service life of the system.

[0069] Finally, in this embodiment, multiple lightweight electrolysis cells can be connected to increase hydrogen production efficiency or adapt to a wider range of application scenarios.

[0070] Each electrolysis cell is equipped with a standardized docking interface at both ends. This standardized docking interface integrates electrical connectors and fluid transmission channels, aiming to achieve plug-and-play electrical coupling and electrolyte flow between adjacent electrolysis cells, ensuring rapid deployment and efficient operation of the system.

[0071] This standardized interface includes electrical contacts for efficient, low-resistance current transmission, and a sealing ring surrounding the fluid path of the interface to ensure leak-free electrolyte transfer between multiple units. It also features an easy-to-use locking mechanism, employing a sliding or rotary locking design, for quick and secure assembly or disassembly of the electrolysis chamber unit.

[0072] Each lightweight electrolysis cell has an integrated rail mounting adapter structure on its back, which supports flexible installation and layout adjustment of the electrolysis cell along horizontal or vertical rails, providing users with a convenient way to expand or reduce hydrogen production capacity as needed.

[0073] An intelligent diagnostic and predictive maintenance system is introduced and integrated into the central control unit. Through continuous monitoring and data analysis of the operating status of each component in each electrolysis chamber, it can provide early warning of potential faults, guide maintenance plans, and ensure the continuous and efficient operation of the system.

[0074] The following section provides a further detailed explanation of the application of the aforementioned lightweight electrolysis chamber in alkaline water electrolysis for hydrogen production:

[0075] Preparation phase: Conduct tests on structural integrity, surface treatment quality, electrical performance, and airtightness to ensure that the lightweight electrolysis chamber is assembled correctly and meets performance standards.

[0076] Alkaline electrolyte introduction: Alkaline electrolyte is introduced through the anode gas-liquid inlet 14 and the cathode gas-liquid inlet 16. These two inlets are equipped with flow self-regulating valves, which automatically adjust the flow rate and pressure of the alkaline solution according to the electrolysis reaction requirements to ensure a stable and suitable supply of alkaline solution.

[0077] Electrolysis process startup: Anode electrode 2 and cathode electrode 6 are attached to the electrode plates. An external power supply is used to energize the electrolysis chamber, and the current is conducted to the electrolyte through the electrodes. After the alkali solution enters from the top inlet, it passes through the nipple structure 9 on the electrode plate protrusion 8. The special flow channel formed by this structure makes the alkali solution flow field more uniform and regular.

[0078] On the anode plate 1, water molecules decompose to produce oxygen and release electrons; on the cathode plate 7, electrons combine with hydrogen ions in the water to generate hydrogen gas.

[0079] Hydrogen and oxygen produced during electrolysis accumulate on the cathode plate 6 and anode plate 2, respectively, and are then discharged through the anode gas-liquid outlet 15 and cathode gas-liquid outlet 17 located at the bottom of the electrolysis chamber. These two outlets integrate a gas-liquid separation structure to ensure gas purity and prevent liquid droplet entrainment.

[0080] Cycle and Maintenance: Throughout the hydrogen production process, continuously monitor the operating status of the electrolysis chamber, including parameters such as electrolyte flow rate, temperature, pressure, and gas production. Regularly check the tightness of all connecting screw holes, the condition of the sealing gaskets, and the integrity of the coating. Clean or replace components as necessary to ensure the long-term stable operation of the electrolysis chamber.

[0081] Through the above steps, this lightweight electrolysis chamber achieves an efficient and stable alkaline water electrolysis hydrogen production process. Its design features include lightweight materials, integrated structure, self-regulating flow control, efficient gas-liquid separation, and corrosion-resistant surface treatment, which significantly improves hydrogen production efficiency and system reliability.

[0082] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to the method section.

[0083] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lightweight electrolysis cell for hydrogen production by alkaline electrolysis of water, characterized by Comprise: Mutual cooperation assembly of anode plate (1), anode electrode (2), anode pole frame (3), diaphragm (4), cathode pole frame (5), cathode electrode (6) and cathode plate (7); Wherein, the anode plate (1) and cathode plate (7) as the active surface of electrochemical reaction are respectively placed at one end and the other end of electrolytic cell; The center area of the anode plate (1) and cathode plate (7) is provided with a square boss (8) with rounded corners, and a plurality of hemispherical papillary structures (9) are arranged on the boss (8), forming an alkali solution flow field; The anode electrode (2) and cathode electrode (6) are attached to the corresponding anode plate (1) and cathode plate (7) for current conduction; The anode pole frame (3) and cathode pole frame (5) are embedded in the corresponding anode electrode (2) and cathode electrode (6) to provide structural support; The diaphragm (4) is placed between the anode electrode (2) and the cathode electrode (6) as a separation layer to prevent gas mixing and allow electrolyte to pass through; The anode plate (1) and cathode plate (7) adopt a gradient polymer composite structure, which comprises: the square boss (8) with rounded corners in the center area adopts carbon fiber reinforced polytetrafluoroethylene; The edge area adopts glass fiber reinforced polypropylene; The surface of the anode plate (1) and cathode plate (7) is treated by plasma and coated with an anti-corrosion coating; The papillary structure (9) is combined with a self-cleaning coating assembly; The coating assembly includes a base coating and a super-hydrophobic coating; The base coating is realized by constructing nanostructure on the surface of the papillary structure, and micro-nano scale rough surface structure is formed by chemical vapor deposition, physical vapor deposition and electrodeposition method; The super-hydrophobic coating is composed of fluorinated polymer, which is applied on the nanostructure by spraying, dipping or spin coating method, and a compound containing hydrophobic functional group is introduced, and the surface is modified by plasma treatment.

2. The lightweight electrolysis cell for hydrogen production by alkaline electrolysis water according to claim 1, characterized by, The anode plate (1) and cathode plate (7) are provided with first screw holes (10), the anode pole frame (3) and cathode pole frame (5) are provided with second screw holes (11) and third screw holes (12); The first screw hole (10) and the second screw hole (11) are correspondingly arranged.

3. The lightweight electrolytic cell for hydrogen production by alkaline electrolysis of water according to claim 2, characterized in that, The anode plate (1), anode pole frame (3), cathode pole frame (5) and cathode plate (7) are fixedly connected by bolts based on the first screw hole (10) and the second screw hole (11).

4. The lightweight electrolytic cell for hydrogen production by alkaline electrolysis of water according to claim 1, characterized in that, The anode pole frame (3) and cathode pole frame (5) are fixedly connected by bolts based on the third screw hole (12).

5. The lightweight electrolytic cell for hydrogen production by alkaline electrolysis water according to claim 1, characterized in that, The anode pole frame (3) and cathode pole frame (5) are provided with sealing gasket grooves (13) for fixing the diaphragm (4) by sealing gasket.

6. The lightweight electrolytic cell for hydrogen production by alkaline electrolysis water according to claim 1, characterized in that, Comprise: Anode gas-liquid inlet (14) and cathode gas-liquid inlet (16) are respectively arranged on the anode side and cathode side of the top of the electrolytic cell; The anode gas-liquid inlet (14) and cathode gas-liquid inlet (16) are integrated with flow self-regulating valve.

7. The lightweight electrolytic cell for hydrogen production by alkaline electrolysis water according to claim 1, characterized in that, Comprise: Anode gas-liquid outlet (15) and cathode gas-liquid outlet (17) are respectively arranged on the anode side and cathode side of the bottom of the electrolytic cell; The anode gas-liquid outlet (15) and cathode gas-liquid outlet (17) are integrated with gas-liquid separation structure.

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