Electrolyte preparation module and graphite electrode

Abstract

The utility model provides a kind of electrolyte preparation module and graphite electrode, the electrolyte preparation module includes shell, electrode assembly, the shell is divided into gas storage space, water storage space, the electrode assembly includes respectively with power electric connection cathode plate, anode plate, the anode plate is at least partially immersed in the water storage space, the cathode plate is located the interface of gas storage space, water storage space, for preparing the electrolyte containing hydrogen peroxide under preset potential.The electrolyte preparation module and graphite electrode of the utility model generate relatively stable hydrogen peroxide by cathode reaction, have less by-product and high efficiency;Cathode is set water gas interface, so that it can use oxygen in air to promote electrolysis reaction, make hydrogen peroxide reach higher concentration, so as to have good decontamination effect.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and more specifically, to an electrolyte preparation module and a graphite electrode. Background Technology

[0002] As living standards continue to improve, people are paying more and more attention to clothing cleaning and care. Traditional laundry methods often rely on detergents, using the mechanical force generated by the washing machine rotating the clothes in conjunction with the detergent to remove stains. However, detergent residue may pose a potential threat to human health.

[0003] To address this, Chinese Patent CN1576440A discloses a washing machine including an electrolyzed water supply device. This device electrolyzes water entering the electrolyzing device from the washing tub by applying voltage to electrodes, generating electrolyzed water containing hypochlorous acid and active oxygen (O2-), which have bactericidal effects. The washing machine then performs a rinsing cycle to disinfect the laundry. However, the hypochlorous acid and active oxygen (O2-) generated in this solution have extremely poor stability and short shelf life, affecting the final disinfection effect. Furthermore, Chinese Patent CN111455614A discloses a drum washing machine including an ozone generator for producing ozone for disinfection. However, the ozone produced in this solution has low solubility, resulting in less than ideal disinfection and washing effects.

[0004] Hydrogen peroxide, generated by the electrolysis of water under specific conditions, leaves no residue on clothing and is harmless to human health. Furthermore, its good stability and water solubility result in excellent stain removal, bleaching, and sterilization effects, making it a promising candidate for application in the clothing treatment field. Therefore, this invention is proposed. Utility Model Content

[0005] The problem solved by this invention is that the active ingredients in the electrolyzed water produced by existing devices have poor solubility and / or stability, resulting in unsatisfactory cleaning effects when used in household appliances such as washing machines.

[0006] To address the aforementioned problems, this utility model provides an electrolyte preparation module, comprising a housing and an electrode assembly. The housing contains a gas storage space and a water storage space. The electrode assembly includes a cathode plate and an anode plate, both electrically connected to a power source. The anode plate is at least partially immersed in the water storage space, and the cathode plate is located at the interface between the gas storage space and the water storage space. The cathode plate is configured to prepare an electrolyte containing hydrogen peroxide at a preset potential. The cathode plate includes a substrate, which is a graphite felt. A first hydrophobic layer is disposed on the surface of the substrate, a second catalytic layer is disposed on the surface of the first hydrophobic layer, and a third hydrophobic layer is disposed on the surface of the second catalytic layer.

[0007] Furthermore, the first hydrophobic layer, the second catalytic layer, and the third hydrophobic layer are all made of carbon powder and polytetrafluoroethylene.

[0008] Furthermore, the housing has an opening, the anode plate can cover the opening, a water storage space is formed between the anode plate, the cathode plate and the housing, the anode plate has a through hole communicating with the water storage space, and a gas storage space is formed between the cathode plate and the side of the housing away from the opening.

[0009] Furthermore, the inner wall surface of the housing is provided with a first groove and a second groove that are parallel to each other. The anode plate is inserted and assembled into the first groove in the horizontal direction, and the cathode plate is inserted and assembled into the second groove in the horizontal direction. It also includes a partition plate, and a limiting block is provided at one end of the housing. The partition plate is slidably mounted to the limiting block in the vertical direction.

[0010] Furthermore, the shell is provided with a water inlet, which is used to deliver the raw liquid to be reacted into the water storage space.

[0011] Furthermore, the housing includes a water outlet, and a medium channel is formed between the water inlet and the water outlet.

[0012] Furthermore, the distance between the cathode plate and the anode plate is 0.2-20mm, and the preset potential is 1-40V.

[0013] Furthermore, it also includes an air inlet, which is connected to a gas delivery device for replenishing the gas storage space with oxygen-containing gas.

[0014] This application also provides a graphite electrode for the aforementioned electrolyte preparation module. The graphite electrode includes a substrate, which is configured as a graphite felt. A first hydrophobic layer is disposed on the surface of the substrate, a second catalytic layer is disposed on the surface of the first hydrophobic layer, and a third hydrophobic layer is disposed on the surface of the second catalytic layer.

[0015] Furthermore, the first hydrophobic layer, the second catalytic layer, and the third hydrophobic layer are all made of carbon powder and polytetrafluoroethylene.

[0016] Compared with the prior art, the electrolyte preparation module and graphite electrode described in this embodiment of the invention have the following beneficial effects:

[0017] 1) By generating relatively stable hydrogen peroxide through cathode reaction, there are fewer byproducts and the efficiency is high;

[0018] 2) By placing the cathode at the water-air interface, it can utilize oxygen in the air to promote the electrolysis reaction, thereby improving the production efficiency of hydrogen peroxide.

[0019] 3) It has a simple structure, low production cost, and is easy to implement. Attached Figure Description

[0020] Figure 1 This is a longitudinal cross-sectional schematic diagram of the electrolyte preparation module described in Embodiment 1 of this utility model;

[0021] Figure 2 This is an exploded view of the electrolyte preparation module described in Embodiment 1 of this utility model;

[0022] Figure 3 This is a schematic diagram of the electrolyte preparation module described in Embodiment 2 of this utility model;

[0023] Figure 4 This is a schematic diagram of the electrolyte preparation module from another perspective in Embodiment 2 of this utility model;

[0024] Figure 5 This is an exploded view of the electrolyte preparation module described in Embodiment 2 of this utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the cathode plate described in an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Shell; 11. Inlet; 12. Outlet; 13. Clearance hole; 14. First groove; 15. Second groove; 16. Limiting block; 17. Support structure; 2. Cover plate; 21. Air inlet; 3. Electrode assembly; 31. Cathode plate; 310. Substrate; 3101. First hydrophobic layer; 3102. Second catalyst layer; 3103. Third hydrophobic layer; 311. First connector; 32. Anode plate; 321. Second connector; 4. Gas storage space; 5. Water storage space; 6. Partition plate. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Without conflict, the technical features of the embodiments of this utility model can be combined with each other.

[0029] It should be noted that 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.

[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] Example 1

[0033] like Figure 1-2 As shown, an electrolyte preparation module includes a housing 1 and an electrode assembly 3. The housing 1 is divided into a gas storage space 4 and a water storage space 5. The electrode assembly 3 includes a cathode plate 31 and an anode plate 32, which are electrically connected to a power source. The anode plate 32 is immersed in the water storage space 5. The cathode plate 31 is located at the interface between the gas storage space 4 and the water storage space 5. The cathode plate 31 is configured to prepare an electrolyte containing hydrogen peroxide at a preset potential.

[0034] This configuration ensures that the cathode plate 31 utilizes the air in the gas storage space 4 to promote the generation of hydrogen peroxide during electrolysis. Simultaneously, the generated hydrogen peroxide dissolves in water promptly to prevent rapid degradation, thus preparing an electrolyte with a high and stable hydrogen peroxide concentration, thereby improving the cleaning effect of washing machines and garment care machines. The top of the housing 1 can be open, in which case the cathode plate 31 is directly exposed to the air. The reaction formula for preparing the H2O2 electrolyte on the cathode plate 31 can be expressed as: O2 + 2H2O → 2H2O2.

[0035] As an example of this application, the anode plate 32 is made of an electrocatalytic material, such as an electrocatalytic material composed of platinum, gold, ruthenium, titanium, carbon-based materials, noble metals and transition metal oxides, or noble metals and carbon-based materials; the cathode plate 31 is made of a carbon-based material, such as carbon nanoplates, graphene, or graphite felt. For example, the cathode plate 31 is a graphite electrode, and the anode plate 32 is a ruthenium-iridium coated titanium electrode, or both the cathode plate 31 and the anode plate 32 can be made of low-cost graphite electrodes.

[0036] Preferably, the cathode plate 31 is a graphite electrode with a hydrophobic interface and a gas-philic interface disposed opposite to each other. The hydrophobic interface is immersed in the water storage space 5, and the gas-philic interface is exposed in the gas storage space 4. This arrangement allows the water storage space 5 to provide water as a reactant to the cathode plate 31 to participate in the electrolysis process, while contact with the gas storage space ensures continuous oxygen transport to improve the efficiency of hydrogen peroxide generation. In addition, the contact surface between the cathode plate 31 and the water maintains stable hydrophobicity, enabling the generated H2O2 to quickly and effectively detach from the surface of the cathode plate 31, thus making it possible to generate a high-concentration hydrogen peroxide electrolyte.

[0037] like Figure 6 As shown, in one specific embodiment provided in this application, the cathode plate 31 includes a substrate 310, which is configured as graphite felt. A first hydrophobic layer 3101 is disposed on the surface of the substrate 310. A second catalytic layer 3102 is disposed on the surface of the first hydrophobic layer 3101. A third hydrophobic layer 3103 is disposed on the surface of the second catalytic layer 3102. The first hydrophobic layer 3101, the second catalytic layer 3102, and the third hydrophobic layer 3103 are all made of carbon powder and polytetrafluoroethylene. A gas storage space 4 is formed between the cathode plate 31 and the cover plate 2, and a water storage space 5 is formed between the cathode plate 31 and the anode plate 32. A portion of the cathode plate 31 is located on the water level line of the water storage space 5.

[0038] In detail, the first hydrophobic layer 3101, the second catalyst layer 3102 and the third hydrophobic layer 3103 are all made of carbon powder and polytetrafluoroethylene, which are existing technologies and will not be described in detail here.

[0039] This setup ensures that the cathode plate 31 utilizes the gas in the gas storage space 4 to promote the generation of electrolyte during the electrolysis process, while the generated electrolyte can be dissolved in water in a timely manner to prevent it from being rapidly degraded, thereby preparing a high-concentration and stable electrolyte.

[0040] Understandably, the cathode plate 31 is located at the water-gas interface. Oxygen from the gas storage space 4 permeates through micropores to the side of the cathode plate 31 immersed in water, where it undergoes a reduction reaction with water under electrocatalysis to generate hydrogen peroxide. The first hydrophobic layer 3101, covered by carbon powder and polytetrafluoroethylene (PTFE), provides a smooth and hydrophobic surface. The second catalytic layer 3102, also covered by carbon powder and PTFE, ensures the conductivity of the electrode and oxygen reduction. The third hydrophobic layer 3103, covering the second catalytic layer 3102, maintains the stability of the water-gas interface of the cathode plate 31, preventing water from the water storage space 5 from submerging the gas storage space 4. Simultaneously, its hydrophobicity reduces the obstruction of liquid to gas permeation, indirectly promoting oxygen participation in the reaction and allowing the generated hydrogen peroxide to dissolve rapidly in the water. Meanwhile, the third hydrophobic layer 3103 maintains the water-gas interface and promotes the detachment of hydrogen peroxide from the electrode surface, preventing hydrogen peroxide degradation. On the other hand, oxygen in the gas storage space 4 can permeate into the water through the micropores on the cathode plate 31 to participate in the electrolysis reaction, replenishing the dissolved oxygen in the water and further promoting hydrogen peroxide generation. As an example of this application, the cathode plate 31 and the anode plate 32 are placed horizontally, with the cathode plate 31 located above the anode plate 32, and the distance between them is 0.2-20 mm. As an example of this application, the preset potential is between 1-40V.

[0041] As an example of this application, the cathode plate 31 is provided with a first connector 311, and the anode plate 32 is provided with a second connector 321. The first connector 311 is located directly above the second connector 321. Two clearance holes 13 are provided on the side of the housing 1. The first connector 311 and the second connector 321 pass through the clearance holes 13 and are then connected to the power supply via connecting wires. This arrangement has a simple structure and facilitates wiring.

[0042] Preferably, the bottom of the housing 1 is provided with multiple support structures 17. These support structures 17 pass through the anode plate 32 and abut against the bottom surface of the cathode plate 31, with a gap between the anode plate 32 and the bottom of the housing 1. This arrangement allows for the simultaneous assembly of the cathode plate 31 and the anode plate 32 using the support structures 12, while maintaining a gap between the anode plate 32 and the housing 1 to ensure sufficient contact with water, resulting in high electrolysis efficiency. Preferably, the support structure 17 is a fixed column, and the anode plate 32 is interference-fitted to the fixed column. This arrangement allows for adjustment of the height of the anode plate 32 as needed, thereby changing the distance between it and the cathode plate 31.

[0043] As an example of this application, the electrolyte preparation module further includes a cover plate 2. The top of the housing 1 has an opening, and the cover plate 2 is located on top of the housing 1 to seal the opening. An air inlet 21 is provided on the cover plate 2 for communication with the gas storage space 4. Oxygen-containing gas is supplied to the gas storage space 4 through the air inlet 21, allowing for more flexible adjustment of the deployment position of the electrolyte preparation module. Furthermore, the air inlet 21 can also be connected to a gas delivery device to maintain a preset pressure in the gas storage space 4 or adjust the gas pressure in the gas storage space 4 to maintain a preset relationship with the liquid pressure in the water storage space 5. A water inlet 11 is provided on one side of the housing 1, located below the cathode plate 31 and communicating with the water storage space 5. An air inlet 21 is provided on the cover plate 2 for communication with the gas storage space 4. This configuration enables the electrolyte preparation module to prepare high-concentration H2O2 electrolyte in an intermittent manner. In other words, after the cathode plate 31 generates H2O2-containing electrolyte, it is stored until the concentration reaches the preset standard, and then it flows out through the inlet 11 to participate in the decontamination work.

[0044] Preferably, the housing 1 includes a water outlet 12, and the water inlet 11 and water outlet 12 are located on opposite sides of the housing 1, forming a medium channel between the water inlet 11 and water outlet 12. This arrangement allows washing water to continuously pass through the electrolyte preparation module and generate a relatively stable H2O2 electrolyte. The generated electrolyte is directly coupled with the washing and care process of clothes without adding extra processing time. Although the H2O2 concentration in the washing water is lower in this mode, the total amount generated is higher, resulting in better cleaning effect.

[0045] As an example of this application, valve assemblies are respectively provided at the inlet 11 and / or outlet 12. This arrangement allows the valve assemblies to be opened to discharge H2O2 electrolyte for decontamination after the H2O2 electrolyte concentration reaches the standard, or to be opened to discharge H2O2 electrolyte for decontamination after electrolysis for a certain period of time.

[0046] As a preferred embodiment of this utility model, a gas delivery device is provided within the gas storage space 4. This gas delivery device is connected to the air inlet 21 and is used to maintain a preset gas pressure within the gas storage space 4. This arrangement ensures that the cathode plate 31 is not completely submerged in the water storage space 5 while maintaining contact with water, and simultaneously provides the cathode plate 31 with more oxygen-containing gas. The gas delivery device can be an impeller, air pump, gas compressor, etc.

[0047] The H2O2-containing electrolyte generated by the electrolyte preparation module can be used in two scenarios: in-situ production and in-situ use, or production followed by use. Specifically, if the electrolysis process is coupled with clothing treatment, water continuously flows in and out of the water storage space 5 during the electrolysis process, allowing the generated H2O2 electrolyte to directly participate in clothing washing or care. In this case, the generation of hydrogen peroxide is not affected by concentration, resulting in a larger production volume, which is more suitable for clothing washing or rinsing processes with large water consumption. If the electrolysis process is separated from clothing treatment, such as first electrolyzing to generate H2O2 electrolyte and storing it, and then participating in the subsequent clothing treatment process after the concentration reaches a preset value, this mode is more suitable for clothing care stages with small water consumption.

[0048] This application also provides a graphite electrode for the aforementioned electrolyte preparation module. The graphite electrode includes a substrate 310, which is configured as a graphite felt. A first hydrophobic layer 3101 is disposed on the surface of the substrate 310. A second catalytic layer 3102 is disposed on the surface of the first hydrophobic layer 3101. A third hydrophobic layer 3103 is disposed on the surface of the second catalytic layer 3102.

[0049] Preferably, the first hydrophobic layer 3101, the second catalyst layer 3102, and the third hydrophobic layer 3103 are all made of carbon powder and polytetrafluoroethylene.

[0050] Example 2

[0051] like Figure 3-5 As shown, an electrolyte preparation module includes a housing 1 and an electrode assembly 3. The electrode assembly 3 includes a cathode plate 31 and an anode plate 32, which are electrically connected to a power source. The bottom or top of the housing 1 is open, and the anode plate 32 can cover the open. A water storage space 5 is formed between the anode plate 32, the cathode plate 31, and the housing 1. The anode plate 32 is provided with a through hole communicating with the water storage space 5. A gas storage space 4 is formed between the cathode plate 31 and the side of the housing 1 away from the open. The cathode plate 31 is located at the interface between the gas storage space 4 and the water storage space 5, and is used to prepare an electrolyte containing hydrogen peroxide at a preset potential. This setup ensures that the cathode plate 31 utilizes the air in the gas storage space 4 to promote the generation of H2O2 during electrolysis. Simultaneously, the generated H2O2 dissolves in the water promptly to prevent rapid degradation, thus preparing an electrolyte with a high and stable hydrogen peroxide concentration, thereby improving the cleaning effect of washing machines and garment care machines. Meanwhile, the oxygen generated by the anode plate 32 increases the physical agitation of the water storage space 5, resulting in better electrolysis. The reaction formula for preparing the H2O2 electrolyte on the cathode plate 31 can be expressed as: O2 + 2H2O → 2H2O2.

[0052] As an example of this application, the inner wall surface of the housing 1 is provided with a first groove 14 and a second groove 15 that are parallel to each other. The anode plate 32 is inserted and assembled into the first groove 14 in the horizontal direction, and the cathode plate 31 is inserted and assembled into the second groove 15 in the horizontal direction. The electrolyte preparation module also includes a partition 6. A limiting block 16 is provided at one end of the housing 1, and the partition 6 is slidably mounted to the limiting block 16 in the vertical direction.

[0053] This configuration can limit and support the anode plate 32 and the cathode plate 31, while the partition plate 6 can spatially avoid the second terminal 321 of the anode plate 32 and the first terminal 311 of the cathode plate 31 to prevent short circuits.

[0054] As an example of this application, the anode plate 32 is made of an electrocatalytic material, such as an electrocatalytic material composed of platinum, gold, ruthenium, titanium, carbon-based materials, noble metals and transition metal oxides, or noble metals and carbon-based materials; the cathode plate 31 is made of a carbon-based material, such as carbon nanoplates, graphene, or graphite felt. For example, the cathode plate 31 is a graphite electrode, and the anode plate 32 is a ruthenium-iridium coated titanium electrode, or both the cathode plate 31 and the anode plate 32 can be made of low-cost graphite electrodes.

[0055] Preferably, the cathode plate 31 is a graphite electrode with a hydrophobic interface and a gas-philic interface disposed opposite to each other. The hydrophobic interface is immersed in the water storage space 5, and the gas-philic interface is exposed in the gas storage space 4. This arrangement allows the water storage space 5 to provide water as a reactant to the cathode plate 31 to participate in the electrolysis process, while contact with the gas storage space ensures continuous oxygen transport to improve the efficiency of hydrogen peroxide generation. In addition, the contact surface between the cathode plate 31 and the water maintains stable hydrophobicity, enabling the generated H2O2 to quickly and effectively detach from the surface of the cathode plate 31, thus making it possible to generate a high-concentration hydrogen peroxide electrolyte.

[0056] like Figure 6 As shown, in one specific embodiment provided in this application, the cathode plate 31 includes a substrate 310, which is configured as graphite felt. A first hydrophobic layer 3101 is disposed on the surface of the substrate 310. A second catalytic layer 3102 is disposed on the surface of the first hydrophobic layer 3101. A third hydrophobic layer 3103 is disposed on the surface of the second catalytic layer 3102. The first hydrophobic layer 3101, the second catalytic layer 3102, and the third hydrophobic layer 3103 are all made of carbon powder and polytetrafluoroethylene. A gas storage space 4 is formed between the cathode plate 31 and the cover plate 2, and a water storage space 5 is formed between the cathode plate 31 and the anode plate 32. A portion of the cathode plate 31 is located on the water level line of the water storage space 5.

[0057] This setup ensures that the cathode plate 31 utilizes the gas in the gas storage space 4 to promote the generation of electrolyte during the electrolysis process, while the generated electrolyte can be dissolved in water in a timely manner to prevent it from being rapidly degraded, thereby preparing a high-concentration and stable electrolyte.

[0058] Understandably, the cathode plate 31 is located at the water-gas interface. Oxygen from the gas storage space 4 permeates through micropores to the side of the cathode plate 31 immersed in water, where it undergoes a reduction reaction with water under electrocatalysis to generate hydrogen peroxide. The first hydrophobic layer 3101, covered by carbon powder and polytetrafluoroethylene (PTFE), provides a smooth and hydrophobic surface. The second catalytic layer 3102, also covered by carbon powder and PTFE, ensures the conductivity of the electrode and oxygen reduction. The third hydrophobic layer 3103, covering the second catalytic layer 3102, maintains the stability of the water-gas interface of the cathode plate 31, preventing water from the water storage space 5 from submerging the gas storage space 4. Simultaneously, its hydrophobicity reduces the obstruction of liquid to gas permeation, indirectly promoting oxygen participation in the reaction and allowing the generated hydrogen peroxide to dissolve rapidly in the water. Meanwhile, the third hydrophobic layer 3103 maintains the water-gas interface and promotes the removal of hydrogen peroxide from the electrode surface, thus preventing hydrogen peroxide degradation. On the other hand, oxygen in the gas storage space 4 can permeate into the water through the micropores on the cathode plate 31 to participate in the electrolysis reaction, replenishing the dissolved oxygen in the water and further promoting the generation of hydrogen peroxide.

[0059] As an example of this application, the cathode plate 31 and the anode plate 32 are placed horizontally, with the anode plate 32 located above the cathode plate 32, and the distance between them is 0.2-20mm. The preset potential is 1-40V.

[0060] As an example of this application, the housing 1 is provided with an air inlet 21 for communication with the gas storage space 4. A gas delivery device is provided within the gas storage space 4, and this device is connected to the air inlet 21 to supply oxygen-containing gas into the gas storage space 4, maintaining a preset gas pressure within the space. This arrangement ensures that the cathode plate 31 is not completely submerged in the water storage space 5 while maintaining contact with water, and simultaneously provides the cathode plate 31 with more oxygen-containing gas. The gas delivery device can be an impeller, an air pump, a gas compressor, etc.

[0061] Because the gas storage space 4 is affected by the working water level from the water storage space 5, it has a certain pressure. When the pressure of the water storage space 5 is greater than that of the gas storage space 4, the cathode plate 31 will be submerged in water. The oxygen in the gas storage space 4 cannot directly contact the cathode plate 31 to participate in the electrolysis reaction, which will lead to a decrease in the yield of hydrogen peroxide or even failure to electrolyze normally. When the pressure of the water storage space 5 is less than that of the gas storage space 4, the hydrophobic interface of the cathode plate 31 will not be able to stably contact the water. Since the generated hydrogen peroxide cannot quickly leave the electrode surface, it will have an adverse effect on the yield and concentration of hydrogen peroxide.

[0062] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. An electrolyte preparation module, characterized in that, The device includes a housing (1) and an electrode assembly (3). The housing (1) forms a gas storage space (4) and a water storage space (5). The electrode assembly (3) includes a cathode plate (31) and an anode plate (32) that are electrically connected to a power source. The anode plate (32) is at least partially immersed in the water storage space (5). The cathode plate (31) is located at the interface between the gas storage space (4) and the water storage space (5). The cathode plate (31) is configured to prepare an electrolyte containing hydrogen peroxide at a preset potential. The cathode plate (31) includes a substrate (310). The substrate (310) is a graphite felt. A first hydrophobic layer (3101) is provided on the surface of the substrate (310). A second catalytic layer (3102) is provided on the surface of the first hydrophobic layer (3101). A third hydrophobic layer (3103) is provided on the surface of the second catalytic layer (3102).

2. The electrolyte preparation module according to claim 1, characterized in that, The first hydrophobic layer (3101), the second catalytic layer (3102) and the third hydrophobic layer (3103) are all made of carbon powder and polytetrafluoroethylene.

3. The electrolyte preparation module according to claim 1, characterized in that, The housing (1) is provided with an opening, and the anode plate (32) can cover the opening. A water storage space (5) is formed between the anode plate (32), the cathode plate (31) and the housing (1). The anode plate (32) is provided with a through hole communicating with the water storage space (5). The cathode plate (31) and the side of the housing (1) away from the opening form a gas storage space (4).

4. The electrolyte preparation module according to claim 3, characterized in that, The inner wall of the housing (1) is provided with a first groove (14) and a second groove (15) that are parallel to each other. The anode plate (32) is inserted into the first groove (14) in the horizontal direction, and the cathode plate (31) is inserted into the second groove (15) in the horizontal direction. The housing (1) also includes a partition plate (6). A limiting block (16) is provided at one end of the housing (1). The partition plate (6) is slidably mounted to the limiting block (16) in the vertical direction.

5. The electrolyte preparation module according to claim 1, characterized in that, The shell (1) is provided with a water inlet (11), which is used to deliver the raw liquid to be reacted into the water storage space (5).

6. The electrolyte preparation module according to claim 5, characterized in that, The housing (1) includes an outlet (12), and a medium channel is formed between the inlet (11) and the outlet (12).

7. The electrolyte preparation module according to claim 1, characterized in that, The distance between the cathode plate (31) and the anode plate (32) is 0.2-20mm, and the preset potential is 1-40V.

8. The electrolyte preparation module according to claim 1, characterized in that, It also includes an air inlet (21), which is connected to a gas delivery device for supplying oxygen-containing gas into the gas storage space (4).

9. A graphite electrode for use in the electrolyte preparation module according to any one of claims 1-8, characterized in that, The graphite electrode includes a substrate (310), the substrate (310) is configured as a graphite felt, a first hydrophobic layer (3101) is disposed on the surface of the substrate (310), a second catalytic layer (3102) is disposed on the surface of the first hydrophobic layer (3101), and a third hydrophobic layer (3103) is disposed on the surface of the second catalytic layer (3102).

10. The graphite electrode according to claim 9, characterized in that, The first hydrophobic layer (3101), the second catalytic layer (3102) and the third hydrophobic layer (3103) are all made of carbon powder and polytetrafluoroethylene.

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