Standing type critical plane electrochemical generation device

Abstract

The utility model relates to the technical field of electrochemical generation devices, in particular to a standing type critical plane electrochemical generation device which comprises a box body, the box body is provided with a containing cavity, and a box body opening communicated with the containing cavity, a cathode assembly close to the box body opening and an anode assembly far away from the box body opening are arranged on the side face of the box body. The cathode assembly is provided with a near-phase interface reaction area communicated with the opening of the box body, one side of the near-phase interface reaction area and air of the opening of the box body form a gas-solid critical plane, and the other side of the near-phase interface reaction area and the electrolyte of the containing cavity form a solid-liquid critical plane. According to the utility model, the adjacent phase interface reaction area is arranged, so that one side of the cathode assembly and air at the opening of the box body form a gas-solid critical plane, oxygen can be fully utilized by the cathode assembly, and the other side of the adjacent phase interface reaction area and electrolyte in the accommodating cavity form a solid-liquid critical plane, so that the reaction can be continuously carried out; therefore, the efficiency and equilibrium concentration of electrochemical synthesis products are improved, and continuous preparation of high-concentration products is guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of electrochemical generating devices, specifically a static critical surface electrochemical generating device. Background Technology

[0002] An electrochemical device is a device that converts electrical energy into chemical energy. It consists of a power source, a cathode and an anode, and an electrolyte solution or molten electrolyte. When an external power source is connected, current flows through the electrolyte, and reduction and oxidation reactions occur at the cathode and anode, respectively.

[0003] In the traditional preparation process of hydrogen peroxide, the cathode needs to consume dissolved oxygen to drive the reaction. However, due to the limited amount of dissolved oxygen in the water, the efficiency and equilibrium concentration of the electrochemically synthesized products cannot be improved during the reaction process, affecting the continuous preparation of high-concentration products. Therefore, it is necessary to improve the structure of the electrochemical device to improve the efficiency and equilibrium concentration of the electrochemically synthesized products, and further achieve the goal of controlling the balance between reaction performance and economy. Utility Model Content

[0004] Regarding the aforementioned technical problem that the cathode requires dissolved oxygen to drive the reaction in the electrolysis process, the limited dissolved oxygen content in the water hinders the improvement of the efficiency and equilibrium concentration of the electrochemically synthesized products, thus affecting the continuous preparation of high-concentration products, the technical solution adopted by this invention to solve this problem is as follows:

[0005] A static critical surface electrochemical generator includes a housing with a accommodating cavity. The housing has an opening communicating with the accommodating cavity on its side, a cathode assembly located in the accommodating cavity and close to the opening, and an anode assembly located in the accommodating cavity and away from the opening. The cathode assembly has a near-phase interface reaction zone communicating with the opening. One side of the near-phase interface reaction zone forms a gas-solid critical surface with the air at the opening, and the other side forms a solid-liquid critical surface with the electrolyte in the accommodating cavity.

[0006] Furthermore, in some embodiments of this utility model, the cathode assembly includes a cathode support near the opening of the housing and a cathode plate connected to the cathode support; the anode assembly includes an anode support away from the opening of the housing and an anode plate connected to the anode support; the cathode support has a cathode support opening communicating with the opening of the housing; the cathode plate communicates with the opening of the housing through the cathode support opening; and the anode support has an anode support opening communicating with the accommodating cavity.

[0007] Furthermore, in some embodiments of this utility model, the cathode sheet is provided with a hydrophobic and breathable layer, and the adjacent phase interface reaction zone is located in the hydrophobic and breathable layer.

[0008] Furthermore, in some embodiments of this utility model, the housing is provided with a first limiting frame for fixing the cathode support and a second limiting frame for fixing the anode support, and the cathode support and the anode support are arranged opposite to each other.

[0009] Furthermore, in some embodiments of this utility model, the second limiting frame is provided with a plurality of limiting grooves into which the anode bracket extends, the plurality of limiting grooves being spaced apart, and the limiting grooves extending in the vertical direction.

[0010] Furthermore, in some embodiments of this utility model, the first limiting frame includes a first left limiting bracket and a first right limiting bracket respectively disposed on both sides of the box opening, the second limiting frame includes a second left limiting bracket and a second right limiting bracket respectively disposed on both sides of the box opening, the first left limiting bracket and the first right limiting bracket are disposed opposite to each other, the second left limiting bracket and the second right limiting bracket are disposed opposite to each other, and the cathode plate and the anode plate are disposed opposite to each other.

[0011] Furthermore, in some embodiments of this utility model, the cathode support includes a first cathode support, a second cathode support, and a cathode support receiving cavity located between the first cathode support and the second cathode support, with the cathode sheet located in the cathode support receiving cavity; the anode support includes a first anode support, a second anode support, and an anode support receiving cavity located between the first anode support and the second anode support, with the anode sheet located in the anode support receiving cavity; the cathode support openings are respectively disposed in the first cathode support and the second cathode support; and the anode support openings are respectively disposed in the first anode support and the second anode support.

[0012] Furthermore, in some embodiments of this utility model, the first cathode support is provided with a cathode support engaging portion, the second cathode support is provided with a cathode support connecting portion that cooperates with and connects to the cathode support engaging portion, the first anode support is provided with an anode support engaging portion, the second anode support is provided with an anode support connecting portion that cooperates with and connects to the anode support engaging portion, the cathode support is provided with a cathode support connecting groove for one end of the cathode plate to extend out and connect to an external power source, and the anode support is provided with an anode support connecting groove for one end of the anode plate to extend out and connect to an external power source.

[0013] Furthermore, in some embodiments of this utility model, the housing is provided with a housing positioning part arranged around the opening of the housing, and the cathode support is provided with a cathode limit position part that abuts against the housing positioning part.

[0014] Furthermore, in some embodiments of this utility model, the distance between the anode plate and the cathode plate is between 2-50 mm, the anode plate is made of a metal-coated substrate, the cathode plate is made of a conductive inert metal material, the cathode plate is provided with a cathode catalyst layer and a hydrophobic and breathable resin, and the hydrophobic and breathable layer is formed by mixing and sintering the cathode catalyst and the hydrophobic and breathable resin.

[0015] The beneficial effects of this utility model are as follows:

[0016] This invention establishes a near-phase interface reaction zone, creating a gas-solid critical surface between one side of the cathode assembly and the air at the opening of the housing. This increases the contact area between the cathode and oxygen in the air, allowing the cathode assembly to utilize oxygen more fully and providing a continuous oxygen supply for the cathode assembly reaction. The other side of the near-phase interface reaction zone forms a solid-liquid critical surface with the electrolyte in the containment cavity, enabling the reaction to proceed continuously. This improves the efficiency and equilibrium concentration of the electrochemically synthesized products, ensuring the continuous preparation of high-concentration products. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the static critical surface electrochemical generator of this utility model.

[0018] Figure 2 This is a schematic diagram from another perspective of the static critical surface electrochemical generator of this utility model.

[0019] Figure 3 for Figure 2 AA sectional view.

[0020] Figure 4 for Figure 3 Enlarged view of part B.

[0021] Figure 5 This is an exploded view of the static critical surface electrochemical generator of this invention. Detailed Implementation

[0022] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings. The described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0023] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0024] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0025] like Figures 1 to 5 The static critical surface electrochemical generator shown includes a housing 1, which has a accommodating cavity 11. The side of the housing 1 has a housing opening 12 communicating with the accommodating cavity 11, a cathode assembly 3 located in the accommodating cavity 11 and close to the housing opening 12, and an anode assembly 4 located in the accommodating cavity 11 and away from the housing opening 12. The cathode assembly 3 has a near-phase interface reaction zone 30 communicating with the housing opening 12. One side of the near-phase interface reaction zone 30 forms a gas-solid critical surface with the air in the housing opening 12, and the other side forms a solid-liquid critical surface with the electrolyte in the accommodating cavity 11.

[0026] Compared with traditional devices, this invention no longer relies solely on the limited dissolved oxygen in water to supply the cathode reaction. By setting up an adjacent phase interface reaction zone, this invention creates a gas-solid critical surface between one side of the cathode assembly and the air at the opening of the chamber, thereby increasing the contact area between the cathode and oxygen in the air. This allows the oxygen to be utilized more fully by the cathode, providing a continuous oxygen supply for the cathode reaction. The other side of the adjacent phase interface reaction zone forms a solid-liquid critical surface with the electrolyte in the containment cavity, enabling the reaction to proceed continuously. This improves the efficiency and equilibrium concentration of the electrochemical synthesis products, ensuring the continuous preparation of high-concentration products.

[0027] Furthermore, as a preferred embodiment of this utility model and not a limitation, when the other side of the cathode assembly forms a solid-liquid critical surface with the electrolyte in the accommodating cavity, this arrangement allows the electrolyte to fully contact the cathode assembly, providing the necessary environment for the electrochemical reaction. The surrounding electrolyte environment is stable and suitable for the reaction to proceed, facilitating the rapid transfer of oxygen from the gas-solid critical surface to the solid-liquid critical surface, thereby participating in the cathode reaction and improving the efficiency of oxygen participation in the reaction. Simultaneously, the presence of the solid-liquid critical surface also contributes to the uniform distribution and flow of the electrolyte, further promoting the reaction. At this point, the cathode assembly forms a gas-solid-liquid critical surface.

[0028] Optionally, in some embodiments, during the electrolytic preparation of hydrogen peroxide, oxygen can diffuse through the critical plane to the cathode surface in the critical plane state. During the electrochemical reaction, oxygen reduction occurs at the cathode surface to generate hydrogen peroxide.

[0029] O2+ 2H + + 2e - → H2O2;

[0030] Simultaneously, an oxidation reaction occurs on the anode surface, either water or oxygen, to generate oxygen.

[0031] 2H₂O → O₂ + 4H + + 4e - ;

[0032] The overall reaction of the entire electrolysis process is 2H2O + O2 → 2H2O2.

[0033] This invention, by setting up a reaction zone at the adjacent phase interface, facilitates the rapid transfer of oxygen from the gas-solid critical surface to the solid-liquid critical surface, thereby participating in the cathode reaction, promoting the reaction process, and improving the continuous production efficiency of high-concentration hydrogen peroxide.

[0034] Optionally, in some embodiments, the contact depth between the cathode electrode and the electrolyte surface, as well as the height difference between the tank opening and the electrolyte surface, can be controlled so that the adjacent phase interface reaction zone can be connected to the tank opening while the electrolyte surface does not flow out from the lowest position of the tank opening, thereby achieving the formation of a gas-liquid-solid interface on the adjacent phase interface reaction zone.

[0035] Optionally, in some embodiments, this invention can also be applied to the oxygen cathode process for alkali production, using the oxygen electrode reduction reaction instead of the hydrogen evolution reaction, thereby improving the continuous production efficiency of high-concentration sodium hydroxide.

[0036] Optionally, in some embodiments, the surface structure of the adjacent phase interface reaction zone can be configured, for example, by coating or mixing in a hydrophobic and breathable resin, so that the electrolyte cannot permeate from one side of the adjacent phase interface reaction zone to the other side. Since the electrolyte will not transfer to the outside of the tank opening, a gas-liquid-solid interface is formed on the adjacent phase interface reaction zone.

[0037] like Figures 3 to 5The static critical surface electrochemical generator shown includes a cathode assembly 3 comprising a cathode support 31 near the housing opening 12 and a cathode plate 32 connected to the cathode support 31, and an anode assembly 4 comprising an anode support 41 away from the housing opening 12 and an anode plate 42 connected to the anode support 41. The cathode support 31 has a cathode support opening 310 communicating with the housing opening 12, and the cathode plate 32 is connected to the housing opening 12 through the cathode support opening 310. The anode support 41 has an anode support opening 410 communicating with the accommodating cavity 11.

[0038] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, the cathode plate is directly connected to the opening of the housing through the opening of the cathode support, so that oxygen in the air can directly contact the cathode plate, thereby improving the utilization rate of oxygen and the reaction efficiency, avoiding the problem of limited dissolved oxygen content in traditional devices, and enabling the reaction to proceed faster and more efficiently.

[0039] The anode and cathode assemblies in this invention are designed separately, with a certain distance between them. This facilitates the uniform distribution and flow of the electrolyte, reducing uneven distribution and localized excessive concentrations of the electrolyte between the anode and cathode, thereby improving the uniformity and stability of the reaction. The design of the cathode and anode supports allows for easy installation and removal of the cathode and anode plates, facilitating not only the replacement of damaged electrodes but also cleaning and maintenance, thus extending the lifespan of the device.

[0040] The opening in the cathode support allows for better contact between the gas and one side of the reaction zone at the adjacent phase interface, while the opening in the anode support allows for better contact between the electrolyte and the anode plate. Furthermore, the design of the cathode support opening facilitates the observation and maintenance of the cathode plate. During device operation, operators can directly observe the condition of the cathode plate through the cathode support opening. Optionally, in some embodiments, operators can observe whether there are air bubbles adhering to the cathode plate, or whether corrosion has occurred, through the cathode support opening.

[0041] like Figures 1 to 5 The static critical surface electrochemical generator shown has a cathode plate 32 with a hydrophobic and breathable layer, and the adjacent phase interface reaction zone 30 is located in the hydrophobic and breathable layer.

[0042] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, the porous structure of the hydrophobic and breathable layer provides a transport channel for oxygen, preventing the electrolyte from directly leaking into the electrode interior. By increasing the gas-liquid contact area, oxygen can reach the electrode surface more quickly and participate in the reaction, which helps to accelerate the reaction rate and improve the efficiency of electrochemical synthesis products.

[0043] In traditional electrochemical devices, the generation and adhesion of bubbles can interfere with the flow of electrolyte and the reaction of electrodes. However, the hydrophobic and breathable layer can reduce the adhesion and accumulation of bubbles on the electrode surface, thereby optimizing the reaction environment and improving the stability and uniformity of the reaction.

[0044] like Figure 2 , Figure 3 and Figure 5 The static critical surface electrochemical generator shown has a housing 1 equipped with a first limiting frame 5 for fixing the cathode support 31 and a second limiting frame 6 for fixing the anode support 41, with the cathode support 31 and the anode support 41 arranged opposite to each other.

[0045] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, the cathode support and the anode support are fixed by the first limiting frame and the second limiting frame respectively, which makes the structure of the entire electrochemical device more stable and helps to prevent the electrodes from shaking or shifting due to factors such as electrolyte flow and bubble generation during the reaction process, thereby ensuring the continuity and stability of the reaction.

[0046] Specifically, the cathode support and anode support are precisely positioned in the predetermined positions of the chamber by the first limiting frame and the second limiting frame, respectively, ensuring that the spacing between the electrodes remains consistent during the reaction process. This consistency helps to optimize the conditions of the electrochemical reaction, such as current density and electric field distribution, thereby improving reaction efficiency and product quality.

[0047] like Figure 3 and Figure 5 The static critical surface electrochemical generator shown has a second limiting frame 6 with a plurality of limiting grooves 60 into which the anode support 41 extends. The plurality of limiting grooves 60 are spaced apart and extend in the vertical direction.

[0048] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, multiple limiting grooves are spaced apart, allowing the anode support to be flexibly arranged in different positions within the electrochemical device. Operators can adjust the distance between the cathode and anode supports as needed. This flexibility helps optimize the electric field distribution between the anode and cathode, ensuring smooth transport of electrons and ions during the reaction process, thereby improving the rate and efficiency of the electrochemical reaction.

[0049] Specifically, the limiting groove simplifies the installation process of the anode support. Operators only need to align the anode support with the limiting groove and insert it from top to bottom. This not only saves installation time but also reduces installation difficulty and cost, improving the maintenance efficiency and flexibility of the electrochemical device. The vertically extending limiting groove helps maintain the vertical stability of the anode support, avoiding uneven reaction caused by shaking or tilting. This helps improve product purity and yield, reduces side reactions, and avoids risks such as short circuits or equipment damage caused by anode support detachment.

[0050] like Figure 3 and Figure 5 The static critical surface electrochemical generator shown includes a first limiting frame 5 comprising a first left limiting bracket 51 and a first right limiting bracket 52 respectively disposed on both sides of the housing opening 12, and a second limiting frame 6 comprising a second left limiting bracket 61 and a second right limiting bracket 62 respectively disposed on both sides of the housing opening 12. The first left limiting bracket 51 and the first right limiting bracket 52 are disposed opposite to each other, the second left limiting bracket 61 and the second right limiting bracket 62 are disposed opposite to each other, and the cathode plate 32 and the anode plate 42 are disposed opposite to each other.

[0051] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, the first left limiting bracket and the first right limiting bracket are arranged opposite each other to fix the cathode bracket, and the second left limiting bracket and the second right limiting bracket are arranged opposite each other to fix the anode bracket. This symmetrical structural design ensures that the cathode assembly and the anode assembly are firmly fixed in the housing. This prevents displacement of the cathode and anode plates, ensuring the structural stability of the device. It also helps to ensure that the cathode and anode plates are arranged opposite each other, maintaining a uniform and fixed distance between them, thereby forming a uniform electric field distribution. This uniform electric field distribution is beneficial to the transport of electrons and ions, thereby improving the rate and efficiency of the electrochemical reaction.

[0052] Specifically, in the electrolyte solution, a uniform electric field promotes the migration of cations towards the cathode and anions towards the anode, resulting in a more orderly and uniform migration. For cathodic reactions that require dissolved oxygen, this uniform electric field and ion migration environment facilitate the uniform diffusion of oxygen from the electrolyte to the cathode surface. It also allows reaction products to diffuse away from the electrode surface in a timely manner, avoiding localized excessively high or low concentrations, thereby optimizing reaction performance and improving product formation efficiency and quality.

[0053] like Figure 3 and Figure 5The static critical surface electrochemical generator shown includes a cathode support 31 comprising a first cathode support 311, a second cathode support 312, and a cathode support accommodating cavity 313 located between the first cathode support 311 and the second cathode support 312. A cathode sheet 32 ​​is located in the cathode support accommodating cavity 313. An anode support 41 includes a first anode support 411, a second anode support 412, and an anode support accommodating cavity 413 located between the first anode support 411 and the second anode support 412. An anode sheet 42 is located in the anode support accommodating cavity 413. Cathode support openings 310 are respectively provided in the first cathode support 311 and the second cathode support 312, and anode support openings 410 are respectively provided in the first anode support 411 and the second anode support 412.

[0054] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, the cathode support and anode support adopt a layered structure. The first cathode support, the second cathode support, the first anode support, and the second anode support make the positions of the corresponding electrode sheets more stable within their respective accommodating cavities. The cathode sheet is located in the cathode support accommodating cavity, and the anode sheet is located in the anode support accommodating cavity. This structure provides good physical protection for the electrode sheets, preventing scratches or deformation due to accidental impacts, thereby extending the service life of the electrode sheets. The cathode and anode supports can restrict the movement of the corresponding electrode sheets in the plane, ensuring that the electrode sheets remain in a suitable position during the reaction process, which is beneficial for maintaining a stable electric field distribution and a uniform reaction environment. Even in the presence of liquid flow or slight vibration, the electrode sheets can stably carry out electrochemical reactions.

[0055] Furthermore, when it is necessary to replace the electrode plates, new electrode plates can be directly removed or inserted from the cathode support cavity or anode support cavity without requiring large-scale disassembly of the entire device. At the same time, the type, size, or number of electrode plates can be flexibly adjusted within the cathode support cavity or anode support cavity according to different reaction requirements, improving the adaptability and scalability of the device.

[0056] The openings of the cathode support are respectively located in the first cathode support and the second cathode support, and the openings of the anode support are respectively located in the first anode support and the second anode support. This arrangement allows the electrolyte to fully contact the electrode plates, and without obstruction, the distance between the cathode and anode plates remains consistent, and the electric field distribution is more uniform.

[0057] like Figure 4The static critical surface electrochemical generator shown has a first cathode support 311 with a cathode support engaging portion 3111, a second cathode support 312 with a cathode support connecting portion 3121 that mates with the cathode support engaging portion 3111, a first anode support 411 with an anode support engaging portion 4111, and a second anode support 412 with an anode support connecting portion 4121 that mates with the anode support engaging portion 4111. The cathode support 31 has a cathode support connecting groove 33 for one end of the cathode plate 32 to extend and connect to an external power source, and the anode support 41 has an anode support connecting groove 43 for one end of the anode plate 42 to extend and connect to an external power source.

[0058] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, the cathode support engaging with the cathode support connecting part and the anode support engaging with the anode support connecting part are connected. This arrangement not only saves assembly time but also reduces assembly difficulty and cost. At the same time, this arrangement enhances the structural stability of both the cathode and anode supports, helping to prevent support swaying or displacement caused by electrolyte flow, bubble generation, or other factors during the reaction process, thereby ensuring the stable operation of the electrochemical device.

[0059] In addition, the design of the cathode support connection slot and the anode support connection slot allows one end of the cathode plate and the anode plate to extend and connect to an external power source. This simplifies the connection process, reduces connection difficulty and cost, and this stable connection helps to ensure the continuity and stability of the electrochemical reaction, thereby improving the operating efficiency and reliability of the device.

[0060] Optionally, in some embodiments, the cathode support engagement portion can be a protrusion, the cathode support connection portion can be a groove, the anode support engagement portion can be a protrusion, and the anode support connection portion can be a groove.

[0061] Optionally, in some embodiments, the cathode support engagement portion can be a groove, the cathode support connection portion can be a protrusion, the anode support engagement portion can be a groove, and the anode support connection portion can be a protrusion.

[0062] like Figure 4 and Figure 5 The static critical surface electrochemical generator shown has a housing 1 with a housing positioning part 13 arranged around the housing opening 12, and a cathode support 31 with a cathode limit position part 314 that abuts against the housing positioning part 13.

[0063] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the cooperation between the housing positioning part and the cathode limit position part ensures that the cathode support maintains the same position and angle each time it is installed. This consistency helps to optimize the electric field distribution, ensure the smooth transport of electrons and ions in the reaction process, thereby improving the rate and efficiency of the electrochemical reaction.

[0064] In addition, by firmly fixing the cathode support to the housing, this setup enhances the structural strength of the entire electrochemical device, helps resist external stress and vibration, and improves the durability and reliability of the device.

[0065] Optionally, in some embodiments, the housing positioning part may be a protrusion extending from the periphery of the housing opening toward the cathode support, and the cathode limit positioning part may be a side wall provided on the first cathode support that is attached to the housing positioning part.

[0066] Optionally, in some embodiments, the cathode limit position may be a protrusion extending from the periphery of the cathode support opening toward the direction of the housing opening, and the housing positioning part may be disposed on the inner wall of the periphery of the housing opening and fit against the cathode limit position.

[0067] like Figures 1 to 5 The static critical surface electrochemical generator shown has a distance of 2-50 mm between the anode plate 42 and the cathode plate 32. The anode plate 42 is made of a metal-coated substrate, and the cathode plate 32 is made of a conductive inert metal material. The cathode plate 32 is provided with a cathode catalyst layer and a hydrophobic and breathable resin. The hydrophobic and breathable layer is formed by mixing and sintering the cathode catalyst and the hydrophobic and breathable resin.

[0068] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, setting the distance between the anode plate and the cathode plate between 2-50mm helps to optimize the electric field distribution and ensure the smooth transport of electrons and ions during the reaction process. This spacing range avoids the risk of short circuits caused by too close a distance and also prevents the reduction in reaction efficiency caused by too far a distance.

[0069] Furthermore, the cathode catalytic layer on the cathode sheet can significantly improve the rate and efficiency of electrochemical reactions. The active materials in the cathode catalytic layer can lower the activation energy of the reaction, thereby accelerating the reaction process and improving the purity and yield of the products.

[0070] Specifically, the critical surface electrochemical cathode sheet is formed by coating or incorporating a hydrophobic and permeable resin onto the surface of the cathode catalyst or during the cathode catalyst deposition process, followed by secondary sintering. Because micro-gaps are generated during resin sintering, the cathode catalyst surface becomes hydrophobic after the addition of electrolyte, thus forming a gas-solid-liquid critical surface. This critical surface can significantly improve the hydrogen peroxide generation efficiency and effectively reduce side reactions.

[0071] Specifically, the hydrophobic and breathable layer, through its hydrophobic and breathable resin, effectively transports gas, optimizes the gas distribution on the cathode catalyst layer, and ensures that the reactant gas can uniformly contact the active material in the cathode catalyst layer. It also prevents the cathode catalyst layer from being submerged and failing by preventing electrolyte wetting. Meanwhile, the cathode catalyst layer rapidly adsorbs and activates oxygen upon arrival. The synergistic effect of these two processes significantly improves the utilization efficiency of oxygen at the cathode, solving the problem of limited reaction progress in traditional devices due to the limited dissolved oxygen content in water. This allows more oxygen to participate in the cathode reaction, promoting the efficient generation of electrochemically synthesized products.

[0072] Furthermore, using a metal-coated substrate as the anode not only provides excellent electrical conductivity but also stable structural support. The metal-coated substrate exhibits high corrosion and wear resistance, maintaining stable performance even in harsh electrochemical environments. Specifically, the anode uses a platinum-, iridium-tantalum-, or tin-antimony-coated titanium substrate with a coating thickness of 0.1 μm–1 μm.

[0073] Furthermore, the cathode plate is made of a conductive inert metal material, which is not easily chemically changed during the electrochemical reaction, thus maintaining long-term stability and durability. Specifically, the cathode plate uses materials such as aluminum, titanium, stainless steel, nickel, and platinum-titanium. The cathode catalyst deposited on the surface of the cathode plate is a nano-carbon-based catalyst, such as BN-doped mesoporous carbon, carbon nanotubes, carbon black, and other highly selective two-electron catalysts.

[0074] Example 1

[0075] A static critical surface electrochemical generator includes a housing 1, the housing 1 having a accommodating cavity 11, a housing opening 12 communicating with the accommodating cavity 11 on the side of the housing 1, a cathode assembly 3 located in the accommodating cavity 11 and close to the housing opening 12, and an anode assembly 4 located in the accommodating cavity 11 and away from the housing opening 12. The cathode assembly 3 has a near-phase interface reaction zone 30 communicating with the housing opening 12. The left side of the near-phase interface reaction zone 30 forms a gas-solid critical surface with the air in the housing opening 12, and the right side forms a solid-liquid critical surface with the electrolyte in the accommodating cavity 11.

[0076] This invention establishes a near-phase interface reaction zone 30, which forms a gas-solid critical surface between the left side of the cathode assembly 3 and the air in the box opening 12. This increases the contact area between the cathode and oxygen in the air, allowing oxygen to be utilized more fully by the cathode and providing a continuous oxygen supply for the cathode reaction. The right side of the near-phase interface reaction zone 30 forms a solid-liquid critical surface with the electrolyte in the accommodating cavity 11, enabling the reaction to proceed continuously. This improves the efficiency and equilibrium concentration of the electrochemical synthesis products, ensuring the continuous preparation of high-concentration products.

[0077] Example 2

[0078] Example 2, based on Example 1, also has the following implementation method: This example is applied in the process of electrolytic preparation of hydrogen peroxide. By setting up the adjacent phase interface reaction zone 30, this utility model facilitates the rapid transfer of oxygen from the gas-solid critical surface to the solid-liquid critical surface, thereby participating in the cathode reaction, thus promoting the reaction and improving the continuous preparation efficiency of high-concentration hydrogen peroxide.

[0079] Example 3

[0080] Based on Embodiment 1, Embodiment 3 further includes the following implementation: The cathode assembly 3 includes a cathode support 31 near the housing opening 12 and a cathode plate 32 connected to the cathode support 31; the anode assembly 4 includes an anode support 41 away from the housing opening 12 and an anode plate 42 connected to the anode support 41; the cathode support 31 has a cathode support opening 310 communicating with the housing opening 12; the cathode plate 32 communicates with the housing opening 12 through the cathode support opening 310; and the anode support 41 has an anode support opening 410 communicating with the receiving cavity 11.

[0081] Example 4

[0082] Based on Example 3, Implementation 4 also has the following implementation method: the cathode sheet 32 ​​is provided with a hydrophobic and breathable layer, and the adjacent phase interface reaction zone 30 is located in the hydrophobic and breathable layer.

[0083] Example 5

[0084] Based on Embodiment 3, Embodiment 5 also has the following implementation method: The housing 1 is provided with a first limiting frame 5 for fixing the cathode support 31 and a second limiting frame 6 for fixing the anode support 41, and the cathode support 31 and the anode support 41 are arranged opposite to each other.

[0085] The second limiting frame 6 is provided with a plurality of limiting grooves 60 into which the anode bracket 41 extends. The plurality of limiting grooves 60 are spaced apart and extend in the vertical direction.

[0086] The first limiting frame 5 includes a first left limiting bracket 51 and a first right limiting bracket 52 respectively disposed on both sides of the box opening 12. The second limiting frame 6 includes a second left limiting bracket 61 and a second right limiting bracket 62 respectively disposed on both sides of the box opening 12. The first left limiting bracket 51 and the first right limiting bracket 52 are disposed opposite to each other, the second left limiting bracket 61 and the second right limiting bracket 62 are disposed opposite to each other, and the cathode plate 32 and the anode plate 42 are disposed opposite to each other.

[0087] Example 6

[0088] Implementation 6, based on Embodiment 5, further includes the following implementation: The cathode support 31 includes a first cathode support 311, a second cathode support 312, and a cathode support receiving cavity 313 located between the first cathode support 311 and the second cathode support 312. The cathode sheet 32 ​​is located in the cathode support receiving cavity 313. The anode support 41 includes a first anode support 411, a second anode support 412, and an anode support receiving cavity 413 located between the first anode support 411 and the second anode support 412. The anode sheet 42 is located in the anode support receiving cavity 413. The cathode support openings 310 are respectively provided in the first cathode support 311 and the second cathode support 312, and the anode support openings 410 are respectively provided in the first anode support 411 and the second anode support 412.

[0089] The first cathode support 311 is provided with a cathode support engaging portion 3111, the second cathode support 312 is provided with a cathode support connecting portion 3121 that cooperates with and connects to the cathode support engaging portion 3111, the first anode support 411 is provided with an anode support engaging portion 4111, the second anode support 412 is provided with an anode support connecting portion 4121 that cooperates with and connects to the anode support engaging portion 4111, the cathode support 31 is provided with a cathode support connecting groove 33 for one end of the cathode plate 32 to extend and connect to an external power source, and the anode support 41 is provided with an anode support connecting groove 43 for one end of the anode plate 42 to extend and connect to an external power source.

[0090] The cathode support engagement part 3111 is a protrusion, the cathode support connecting part 3121 is a groove, the anode support engagement part 4111 is a protrusion, and the anode support connecting part 4121 is a groove.

[0091] Example 7

[0092] The difference between Embodiment 7 and Embodiment 6 is that: the cathode support engaging part 3111 is a groove, the cathode support connecting part 3121 is a protrusion, the anode support engaging part 4111 is a groove, and the anode support connecting part 4121 is a protrusion.

[0093] Example 8

[0094] Based on Embodiment 8 and Embodiment 3, the following implementation method is also provided: the box body 1 is provided with a box body positioning part 13 arranged around the box body opening 12, and the cathode support 31 is provided with a cathode limit positioning part 314 that abuts against the box body positioning part 13.

[0095] The housing positioning part 13 is a protrusion extending from the periphery of the housing opening 12 toward the cathode support 31, and the cathode limit part 314 is a side wall provided on the first cathode support 311 that is attached to the housing positioning part 13.

[0096] Example 9

[0097] The difference between Embodiment Nine and Embodiment Eight is that: the cathode limit position 314 is a protrusion extending from the periphery of the cathode support opening 310 toward the housing opening 12, and the housing positioning part 13 is provided on the inner wall of the periphery of the housing opening 12 and fits against the cathode limit position 314.

[0098] Example 10

[0099] Based on Examples 10 and 4, the following implementation method is further provided: the distance between the anode plate 42 and the cathode plate 32 is 2 mm; the anode plate 42 is made of a metal-coated substrate; the cathode plate 32 is made of a conductive inert metal material; the cathode plate 32 is provided with a cathode catalyst layer and a hydrophobic and breathable resin; the hydrophobic and breathable layer is formed by mixing and sintering the cathode catalyst and the hydrophobic and breathable resin; the anode plate is made of a platinum-plated titanium substrate with a coating thickness of 0.1 μm; and the cathode plate is made of aluminum. The cathode catalyst deposited on the surface of the cathode plate is BN-doped mesoporous carbon, and the hydrophobic and breathable resin is polytetrafluoroethylene resin.

[0100] Example 11

[0101] The difference between Example 11 and Example 10 is that the distance between the anode plate 42 and the cathode plate 32 is 50 mm, the anode plate uses an iridium-tantalum coated titanium substrate with a coating thickness of 1 μm, and the cathode plate is made of stainless steel. The cathode catalyst deposited on the surface of the cathode plate is carbon nanotubes.

[0102] Example 12

[0103] The difference between Example 12 and Example 11 is that the distance between the anode plate 42 and the cathode plate 32 is 20mm, the anode plate uses a tin-antimony coated titanium substrate with a coating thickness of 0.5μm, and the cathode plate uses platinum-titanium material.

[0104] Example 13

[0105] The difference between Example 13 and Example 11 is that the distance between the anode plate 42 and the cathode plate 32 is 30 mm, the anode plate uses a tin-antimony coated titanium substrate with a coating thickness of 0.3 μm, and the cathode plate uses nickel. The cathode catalyst deposited on the surface of the cathode plate is carbon black.

[0106] Example 14

[0107] The difference between Example 14 and Example 11 is that the distance between the anode plate 42 and the cathode plate 32 is 10 mm, the anode plate uses an iridium-tantalum coated titanium substrate with a coating thickness of 0.8 μm, and the cathode plate is made of titanium.

[0108] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.

Claims

1. A static critical surface electrochemical generator, comprising a housing (1), wherein the housing (1) is provided with a receiving cavity (11), characterized in that: The side of the housing (1) is provided with a housing opening (12) communicating with the accommodating cavity (11), a cathode assembly (3) located in the accommodating cavity (11) and close to the housing opening (12), and an anode assembly (4) located in the accommodating cavity (11) and far away from the housing opening (12). The cathode assembly (3) is provided with a near-phase interface reaction zone (30) communicating with the housing opening (12). One side of the near-phase interface reaction zone (30) forms a gas-solid critical surface with the air in the housing opening (12), and the other side forms a solid-liquid critical surface with the electrolyte in the accommodating cavity (11).

2. The static critical surface electrochemical generator according to claim 1, characterized in that: The cathode assembly (3) includes a cathode support (31) near the housing opening (12) and a cathode plate (32) connected to the cathode support (31). The anode assembly (4) includes an anode support (41) away from the housing opening (12) and an anode plate (42) connected to the anode support (41). The cathode support (31) is provided with a cathode support opening (310) communicating with the housing opening (12). The cathode plate (32) is connected to the housing opening (12) through the cathode support opening (310). The anode support (41) is provided with an anode support opening (410) communicating with the receiving cavity (11).

3. The static critical surface electrochemical generator according to claim 2, characterized in that: The cathode sheet (32) is provided with a hydrophobic and breathable layer, and the adjacent phase interface reaction zone (30) is located in the hydrophobic and breathable layer.

4. The static critical surface electrochemical generator according to claim 2, characterized in that: The housing (1) is provided with a first limiting frame (5) for fixing the cathode support (31) and a second limiting frame (6) for fixing the anode support (41), and the cathode support (31) and the anode support (41) are arranged opposite to each other.

5. The static critical surface electrochemical generator according to claim 4, characterized in that: The second limiting frame (6) is provided with a plurality of limiting grooves (60) into which the anode bracket (41) extends. The plurality of limiting grooves (60) are spaced apart and extend in the vertical direction.

6. The static critical surface electrochemical generator according to claim 4, characterized in that: The first limiting frame (5) includes a first left limiting bracket (51) and a first right limiting bracket (52) respectively disposed on both sides of the box opening (12). The second limiting frame (6) includes a second left limiting bracket (61) and a second right limiting bracket (62) respectively disposed on both sides of the box opening (12). The first left limiting bracket (51) and the first right limiting bracket (52) are disposed opposite to each other. The second left limiting bracket (61) and the second right limiting bracket (62) are disposed opposite to each other. The cathode plate (32) and the anode plate (42) are disposed opposite to each other.

7. The static critical surface electrochemical generator according to claim 4, characterized in that: The cathode support (31) includes a first cathode support (311), a second cathode support (312), and a cathode support receiving cavity (313) located between the first cathode support (311) and the second cathode support (312). The cathode sheet (32) is located in the cathode support receiving cavity (313). The anode support (41) includes a first anode support (411), a second anode support (412), and an anode support receiving cavity (413) located between the first anode support (411) and the second anode support (412). The anode sheet (42) is located in the anode support receiving cavity (413). The cathode support openings (310) are respectively provided in the first cathode support (311) and the second cathode support (312). The anode support openings (410) are respectively provided in the first anode support (411) and the second anode support (412).

8. The static critical surface electrochemical generator according to claim 7, characterized in that: The first cathode support (311) is provided with a cathode support engaging part (3111), the second cathode support (312) is provided with a cathode support connecting part (3121) that cooperates with the cathode support engaging part (3111), the first anode support (411) is provided with an anode support engaging part (4111), the second anode support (412) is provided with an anode support connecting part (4121) that cooperates with the anode support engaging part (4111), the cathode support (31) is provided with a cathode support connecting groove (33) for one end of the cathode plate (32) to extend and connect to an external power source, and the anode support (41) is provided with an anode support connecting groove (43) for one end of the anode plate (42) to extend and connect to an external power source.

9. The static critical surface electrochemical generator according to claim 2, characterized in that: The housing (1) is provided with a housing positioning part (13) arranged around the housing opening (12), and the cathode support (31) is provided with a cathode limit position part (314) that abuts against the housing positioning part (13).

10. The static critical surface electrochemical generator according to claim 3, characterized in that: The distance between the anode plate (42) and the cathode plate (32) is between 2 and 50 mm. The anode plate (42) is made of a metal-coated substrate, and the cathode plate (32) is made of a conductive inert metal material. The cathode plate (32) is provided with a cathode catalyst layer and a hydrophobic and breathable resin. The hydrophobic and breathable layer is formed by mixing and sintering the cathode catalyst and the hydrophobic and breathable resin.

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