Preparation device and preparation method of bonded alkaline water electrolysis catalyst

Abstract

The invention relates to the technical field of bonded alkaline water electrolysis catalysts, in particular to a preparation device and a preparation method of a bonded alkaline water electrolysis catalyst.The preparation device comprises a preparation device body, and the preparation device body comprises a raw material storage unit and a mixed reaction unit matched with the raw material storage unit; the mixed reaction unit is connected with a coating device, the raw material storage unit comprises a nano-catalysis storage tank, and the raw material storage unit is further provided with an isobutene solution storage tank, an isoprene solution storage tank, a tetrafluoroethylene storage tank, a perfluoroalkyl vinyl ether storage tank, a vinyl fluorine carbide storage tank and a hexafluoropropylene storage tank besides the nano-catalysis storage tank. The preparation device body is further provided with a cleaning unit and a material conveying device in a matched mode, the tail end of the coating device is provided with a drying unit in a matched mode, ingredients, alkaline nano-catalysis and the like are selected as binder components, and therefore the long-term durability of a binder in the alkaline water electrolysis process is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of bonded alkaline water electrolysis catalysts, and in particular to a preparation device and a preparation method of a bonded alkaline water electrolysis catalyst. Background Art

[0002] Alkaline water electrolysis binders generally refer to substances used in the water electrolysis process to help electrode materials firmly adhere to the current collector. In the process of water electrolysis to produce hydrogen, especially in alkaline water electrolyzers, the use of appropriate binders is very important to ensure the stability and durability of the electrodes. The choice of binder depends on several factors, including but not limited to:

[0003] Chemical stability: The binder needs to remain stable in the strong alkaline environment of the electrolyte without decomposition or dissolution.

[0004] Electrochemical inertness: It should not participate in the electrode reaction to avoid affecting the current efficiency and hydrogen production purity.

[0005] Bonding strength: To ensure good contact between the electrode active material and the current collector to reduce contact resistance.

[0006] Electrical conductivity: While it is not always necessary for the adhesive to be inherently conductive, in some applications good conductivity can improve overall performance.

[0007] Cost-effectiveness: Considering the feasibility of large-scale production, the cost of the adhesive is also an important consideration.

[0008] Patent CN1070384A provides a method for preparing phosphorus-containing aluminum sol for industrial catalytic cracking catalyst.

[0009] Patent CN102872877A provides a method for preparing a blended silica sol, which is used for bonding a lithium iron-containing Fischer-Tropsch synthesis catalyst with high wear resistance. Patent CN117700694A provides a cross-linked binder containing polybenzophenone, which can also be used as a membrane material. Patent CN118085284A discloses a polybenzimidazole that can be used as a high-temperature proton exchange membrane material and as a binder.

[0010] Common binders for alkaline water electrolysis may include polymer materials such as polytetrafluoroethylene (PTFE) and polyvinylidene fluoride (PVDF). These materials usually have the good properties mentioned above and have been widely used in fuel cells, lithium batteries, and water electrolysis. At present, some researchers use the method of growing catalysts on nickel meshes. Since the generation of nanocatalysts is usually carried out in an autoclave, it is not suitable to place the nickel mesh in an autoclave; some use electrochemical direct reduction of catalysts onto nickel meshes, but nano-scale particles cannot be produced.

[0011] Alkaline water electrolyzers can use inexpensive catalysts, which are cheap and have a performance of up to 7A / cm2. Currently, about 96% of the water electrolysis market uses alkaline water electrolyzers to electrolyze water. Therefore, it is very important to find a way to adhere the catalyst to the nickel mesh electrode. This adhesive must be resistant to alkali corrosion, have a strong bond, and not fall off even if the temperature changes. Summary of the invention

[0012] In order to solve some of the problems existing in the above-mentioned prior art, the present invention provides a preparation device for a bonded alkaline water electrolysis catalyst to solve the deficiencies existing in the prior art.

[0013] To achieve the above-mentioned purpose, the present invention provides a preparation device for a bonded alkaline water electrolysis catalyst, comprising a preparation device body, the preparation device body comprising a raw material storage unit and a mixed reaction unit arranged in cooperation with the raw material storage unit, the mixed reaction unit being connected with a coating device, the raw material storage unit comprising a nano-catalytic storage tank, the raw material storage unit being provided with an isobutylene solution storage tank, an isoprene solution storage tank, a tetrafluoroethylene storage tank, a perfluoroalkyl vinyl ether storage tank, a vinyl fluoride carbonization storage tank and a hexafluoropropylene storage tank in addition to the nano-catalytic storage tank, the preparation device body being further provided with a cleaning unit and a material conveying device, and a drying unit being provided at the end of the coating device.

[0014] As a further improvement of the present invention, in order to achieve accurate proportioning and sufficient mixing of raw materials and improve the preparation efficiency and quality of the catalyst, the mixed reaction unit includes a second stirring mixing tank, a third mixing stirring mixing tank and a first stirring mixing tank, the feed end of the second stirring mixing tank is connected to the vinyl fluoride storage tank and the hexafluoropropylene storage tank; the feed end of the third stirring mixing tank is connected to the tetrafluoroethylene storage tank and the perfluoroalkyl vinyl ether storage tank, and the feed end of the first stirring mixing tank is connected to the isobutylene solution storage tank and the isoprene solution storage tank.

[0015] As a further improvement of the present invention, in order to ensure uniform coating of the catalyst, the infrared coating detector provides real-time coating quality monitoring, ensuring that the coated catalyst is quickly dried in an oxygen-free environment, thereby improving the stability and performance of the catalyst. The coating equipment includes a material conveyor, a coating port is arranged above the material conveyor, the coating port is provided with several groups, and an infrared coating detector is arranged on one side of the coating port.

[0016] A method for preparing a bonded alkaline water electrolysis catalyst, the method comprising the following steps:

[0017] Step 1: transport any two solutions into corresponding storage tanks through pipelines, and control the transport rate of the solutions through a flow control valve;

[0018] Step 2: transporting the alkaline water electrolysis catalyst into the nanocatalytic storage tank through a pipeline, and controlling the rate of transporting the nanocatalytic storage tank through a flow regulating valve;

[0019] Step 3: Open the flow valves on each pipeline to transport the two solutions into the first stirring and mixing tank through the pipeline;

[0020] Step 4: In the first stirring and mixing tank, stir and mix the alkaline water electrolysis catalyst and the two solutions according to the mass ratio of 3.8-4.2:0.7-1.3:0.3-0.7. To ensure uniform mixing, use a stirrer to stir at an appropriate speed to ensure that all ingredients are fully integrated;

[0021] Step 5: After the stirring and mixing is completed, open the discharge valve of the first stirring and mixing tank, and transport the mixed materials into the coating equipment through the pipeline. The coating equipment should prepare the nickel mesh electrode in advance and transport it to the appropriate coating position through the material conveying equipment;

[0022] Step 6: In the coating equipment, the mixed material is evenly coated on the nickel mesh electrode after being cleaned by the cleaning unit at an amount of 3-5 mg per square centimeter. During the coating process, ensure that the material is evenly distributed without omission or accumulation;

[0023] Step 7: After coating, the nickel mesh electrode coated with the material is sent to the drying unit. In the drying unit, the temperature is set to 70-90°C, and the vacuum pump is turned on to perform vacuum operation to ensure that the environment during the drying process is dry and oxygen-free;

[0024] Step 8: Dry in a drying unit at 70-90°C for 20-28 hours; during this period, the vacuum degree and temperature should be checked regularly to ensure that the drying process proceeds smoothly;

[0025] Step 9: After drying, turn off the power supply and vacuum pump of the drying unit, wait for it to cool naturally to room temperature and then take out the nickel mesh electrode;

[0026] Step 10: Bend the removed nickel mesh electrode 90 degrees to check whether the coating has fallen off; at the same time, use a multimeter to detect the resistance of the nickel mesh electrode to ensure that the resistance value meets the requirements.

[0027] As a further improvement of the present invention, in order to ensure the cleanliness of the nickel mesh electrode before coating, improve the degree of automation of the cleaning process, and reduce manual intervention, the cleaning unit includes an outer frame, which serves as a supporting structure of the entire cleaning unit. The outer frame is provided with a control box, and several groups of cleaning baskets are provided inside the outer frame for accommodating and fixing the nickel mesh electrode to be cleaned; the outer frame is also provided with several groups of cylinders, and the cleaning baskets are placed inside the cylinders. A bubbling tube and a throwing mechanism are provided at the bottom of the cylinders, and the throwing mechanism is connected to the cleaning basket. A feeding line is provided on one side of the outer frame, and a multi-arm manipulator is provided above the outer frame.

[0028] The workflow of the cleaning unit includes the following steps:

[0029] Step 1: Place the nickel mesh electrodes to be cleaned in the cleaning basket; the design of the cleaning basket allows for the electrodes to be accommodated and fixed, ensuring that they will not move or fall off during the cleaning process;

[0030] Step 2: Start the feeding line, which is located on one side of the outer frame and is responsible for transporting the cleaning baskets equipped with nickel mesh electrodes from the preparation area to the processing area of ​​the ultrasonic cleaning machine. Driven by the feeding line, the cleaning baskets enter the designated cylinder positions one by one;

[0031] Step 3: When the cleaning basket reaches the top of the cylinder, the multi-arm robot starts working; the multi-arm robot has a high degree of flexibility and precision, and can accurately place the cleaning basket inside the cylinder. The cleaning basket is securely fixed in the cylinder, ready for the next cleaning step;

[0032] Step 4: The bubbling tube starts working, injecting cleaning liquid into the cylinder and generating bubbles; these bubbles rise and burst in the liquid, generating strong ultrasonic vibrations; the ultrasonic vibrations act on the surface of the nickel mesh electrode to remove dirt, grease and other impurities attached to it; at the same time, the throwing mechanism starts to operate, which is connected to the cleaning basket and enhances the cleaning effect by slightly moving up and down or left and right;

[0033] Step 5: After a certain period of cleaning, the bubbling tube and the throwing mechanism stop working; at this time, the multi-arm robot starts again to take the cleaned cleaning basket out of the cylinder; the cleaning basket is then transported by the feeding line to the next processing area or collection point for subsequent drying, inspection or other processing steps.

[0034] As a further improvement of the present invention, in order to provide a stable conveying platform for drying the nickel mesh electrode and ensure uniform heating and preliminary drying of the nickel mesh electrode, the material conveying equipment includes a drying line, the drying line includes a frame, a furnace body is arranged above the frame, a wind conveying motor is arranged on the top of the furnace body, a belt and a support plate are arranged in the middle section of the frame, a heating tube is arranged above the belt and the support plate, and the heating tube is located below the wind conveying motor.

[0035] The workflow of material conveying equipment includes the following steps:

[0036] Step 1: Check whether all parts of the drying line are intact, and ensure that the fan motor, heating pipe, belt and pallet can work normally; at the same time, check whether the control system is set correctly to ensure that the drying process can be carried out according to the predetermined parameters;

[0037] Step 2: Turn on the power switch of the control system, start the air motor and heating tube; observe the operation of the drying line to ensure that all components can work normally and adjust to the best state;

[0038] Step 3: Place the nickel mesh electrode to be dried on the belt or pallet and start the conveying device; adjust the belt speed and the power of the heating tube according to the characteristics of the material and the drying requirements;

[0039] Step 4: During the drying process, it is necessary to regularly check the operation of the drying line to ensure that there are no abnormalities. At the same time, observe the drying condition of the material and adjust the power of the heating tube and the speed of the belt as needed to achieve the best drying effect.

[0040] Step 5: After the initial drying of the nickel mesh electrode is completed, turn off the heating tube and the air motor; wait for the temperature inside the drying line to drop to a safe range, clean the residue on the belt and the pallet, and transport the initially dried nickel mesh electrode to the coating equipment via the belt for coating.

[0041] As a further improvement of the present invention, in order to provide an oxygen-free, constant temperature drying environment for the curing of the catalyst, ensure that the catalyst is evenly heated during the drying process, and improve the curing efficiency, the drying unit includes a vacuum drying oven, the vacuum drying oven includes a box body, a fan is arranged on the upper part of the box body, and a heating pipe is arranged below the fan, and the heating pipe is arranged in a multi-row structure.

[0042] The workflow of the drying unit includes the following steps:

[0043] Step 1: Use a cart to carry the coated nickel mesh electrode and send the cart into the vacuum drying oven in the gold drying unit;

[0044] Step 2: Set the temperature of the vacuum drying oven to 70-80°C and the baking time to 20-24 hours to ensure that the catalyst and the binder are fully cured;

[0045] Step 3: Close the door of the vacuum drying oven, start the vacuum drying oven, and start the baking process. During the baking process, regularly check the operating status of the vacuum drying oven to ensure that the baking process proceeds smoothly;

[0046] Step 4: After baking, turn off the power of the vacuum drying oven, and open the door of the vacuum drying oven after the internal temperature of the vacuum drying oven drops to a safe range; take out the baked nickel mesh electrode from the cart and perform quality inspection on the baked nickel mesh electrode.

[0047] When the present invention is working, the raw material storage unit is checked to ensure that the raw materials in the nanocatalytic storage tank, the isobutylene solution storage tank, the isoprene solution storage tank, the tetrafluoroethylene storage tank, the perfluoroalkyl vinyl ether storage tank, the vinyl carbonized fluorine storage tank and the hexafluoropropylene storage tank are sufficient and of qualified quality. According to production requirements, the required raw materials are transported to the corresponding storage tanks through the flow regulating valve, and the alkaline water electrolysis catalyst is prepared.

[0048] The mixed reaction unit includes three stirring and mixing tanks: a second stirring and mixing tank, a third stirring and mixing tank and a first stirring and mixing tank. The feed end of the second stirring and mixing tank is connected to a vinyl fluoride storage tank and a hexafluoropropylene storage tank for mixing the two components. The feed end of the third stirring and mixing tank is connected to a tetrafluoroethylene storage tank and a perfluoroalkyl vinyl ether storage tank for mixing the two components. The feed end of the first stirring and mixing tank is connected to an isobutylene solution storage tank and an isoprene solution storage tank for mixing the two components. Each stirring and mixing tank is equipped with a stirrer to ensure that the raw materials can be fully mixed and uniform.

[0049] The coating equipment includes a material conveyor for conveying the mixed material to the coating position. A plurality of coating ports are arranged above the material conveyor, and each coating port is equipped with an infrared coating detector for detecting the uniformity and thickness of the coating. A vacuum drying unit is arranged at the end of the coating port for drying the nickel mesh electrode after coating.

[0050] Open the flow valves on each pipeline and transport the two solutions and the alkaline water electrolysis catalyst into the corresponding stirring and mixing tank through the pipeline according to the predetermined mass ratio. Use a stirrer to stir at an appropriate speed to ensure that all ingredients are fully blended. The coating equipment should prepare the nickel mesh electrode in advance and transport it to the appropriate coating position through the material conveying equipment.

[0051] The nickel mesh electrode is placed in a cleaning basket and transported to the cleaning unit through a feeding line for cleaning. During the cleaning process, the bubbling tube and the throwing mechanism work to generate ultrasonic vibrations to remove dirt and grease on the electrode surface.

[0052] After cleaning, the multi-arm robot takes out the cleaning basket, and the feeding line transports the cleaning basket to the drying line. The nickel mesh electrode to be dried is placed on the belt and the pallet, and the conveying device is started. According to the characteristics of the material and the drying requirements, the speed of the belt and the power of the heating tube are adjusted. The drying line performs preliminary drying on the nickel mesh electrode after cleaning to make its surface dry and dust-free, and the preliminarily dried nickel mesh electrode is transported to the mesh coating equipment.

[0053] The mixed material is evenly coated on the nickel mesh electrode after being cleaned by the cleaning unit at an amount of 3-5 mg per square centimeter. During the coating process, it is necessary to ensure that the material is evenly distributed without omission or accumulation.

[0054] Send the nickel mesh electrode coated with the material into the drying unit. In the drying unit, set the temperature to 70-90℃ and turn on the vacuum pump to evacuate to ensure that the environment is dry and oxygen-free during the drying process. Dry at the set temperature for 20-28 hours. During this period, the vacuum degree and temperature should be checked regularly to ensure that the drying process proceeds smoothly. After drying, turn off the power supply and vacuum pump of the drying unit, and remove the nickel mesh electrode after it cools naturally to room temperature. Bend the removed nickel mesh electrode 90 degrees to test whether the coating has fallen off. At the same time, use a multimeter to detect the resistance of the nickel mesh electrode to ensure that the resistance value meets the requirements.

[0055] The beneficial effects of the present invention are specifically embodied in the following aspects:

[0056] Improved the alkali corrosion resistance and bonding strength of the adhesive:

[0057] The present invention carefully selects isobutylene, isoprene, tetrafluoroethylene, perfluoroalkyl vinyl ether, vinyl fluoride and hexafluoropropylene as binder components. These components show excellent chemical stability in an alkaline environment and are not easily decomposed or dissolved, thereby ensuring the long-term durability of the binder during alkaline water electrolysis.

[0058] At the same time, the combined use of these ingredients can form a strong bonding force, allowing the catalyst to be firmly attached to the nickel mesh electrode and not easily fall off even under temperature changes or mechanical stress, thereby improving the stability and durability of the electrode.

[0059] The preparation process has been optimized and the production efficiency has been improved:

[0060] The present invention provides a preparation device for a bonded alkaline water electrolysis catalyst, which integrates multiple functional units such as raw material storage, mixing reaction, coating, and drying, realizes the automation and continuity of the preparation process, and greatly improves production efficiency.

[0061] By setting up multiple stirring and mixing tanks, different combinations of solutions can be stirred and mixed at the same time, flexibly adapting to different preparation needs. At the same time, the coordinated use of coating equipment and drying units realizes rapid coating and uniform drying of materials, further shortening the preparation cycle.

[0062] Ensures uniformity and quality of coating:

[0063] During the coating process, the present invention uses devices such as material conveyors and coating ports to accurately control the amount and distribution of the coating material to ensure uniform coating without omissions. At the same time, the setting of the infrared coating detector can monitor the thickness and uniformity of the coating in real time and detect problems in the coating process in time.

[0064] Simplified cleaning and drying processes, reduced energy consumption:

[0065] The cleaning unit of the present invention adopts a multi-arm robot and a bubbling tube in combination, which can efficiently clean the nickel mesh electrode, remove dirt, grease and other impurities attached thereto, and provide a good foundation for subsequent coating and drying processes.

[0066] The drying unit adopts a vacuum drying box, which controls the drying process by adjusting the temperature and vacuum degree, which not only shortens the drying time but also reduces energy consumption.

[0067] The cleaning unit removes impurities and ensures the cleanliness of the nickel mesh electrode:

[0068] The cleaning unit is mainly used to clean the nickel mesh electrode to remove dirt, grease and other impurities attached to it, providing a good foundation for the subsequent coating and drying process. Through the cooperation of the bubbling tube and the multi-arm manipulator, the cleaning task can be completed efficiently to ensure the cleanliness of the nickel mesh electrode.

[0069] The drying line performs preliminary drying on the cleaned nickel mesh electrode to ensure uniform heating and preliminary drying of the nickel mesh electrode:

[0070] The drying line is mainly used to preliminarily dry the cleaned nickel mesh electrode to remove moisture from its surface in preparation for the subsequent coating process. Through the cooperation of the wind motor, heating tube and belt, the nickel mesh electrode can be dried quickly and evenly to improve production efficiency. At the same time, the drying line can also adjust the drying parameters according to the characteristics of the material and the drying requirements to achieve the best drying effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] In order to facilitate the understanding of those skilled in the art, the present invention is further described below with reference to the accompanying drawings:

[0072] Figure 1 It is a preparation flow chart of the present invention.

[0073] Figure 2 Flowchart of the raw material storage unit.

[0074] Figure 3 This is the structural flow chart of the raw material storage unit.

[0075] Figure 4 This is a structural diagram of the coating equipment.

[0076] Figure 5 This is a structural diagram of the cleaning unit.

[0077] Figure 6 This is a top view of the material conveying equipment.

[0078] Figure 7 A cross-sectional view of material conveying equipment.

[0079] Figure 8 This is the structural diagram of the drying unit.

[0080] Among them, 1 raw material storage unit, 2 mixing reaction unit, 3 coating equipment, 4 nano-catalytic storage tank, 5 isobutylene solution storage tank, 6 isoprene solution storage tank, 7 tetrafluoroethylene storage tank, 8 perfluoroalkyl vinyl ether storage tank, 9 vinyl carbon fluoride storage tank, 10 hexafluoropropylene storage tank, 11 second stirring and mixing tank, 12 third mixing and stirring tank, 13 first stirring and mixing tank, 14 material conveyor, 15 coating port, 16 infrared coating detector, 17 drying unit, 18 cleaning unit, 19 material conveying equipment, 20 outer frame, 21 control box, 22 cleaning basket, 23 cylinder body, 24 bubbling tube, 25 throwing mechanism, 26 feeding line, 27 multi-arm manipulator, 28 drying line, 29 frame, 30 furnace body, 31 wind motor, 32 belt, 33 support plate, 34 heating tube, 35 vacuum drying box, 36 box body, 37 fan, 38 heating tube. DETAILED DESCRIPTION

[0081] In order to enable those skilled in the art to better understand the technical solution in this application, Figure 1-8 The present invention is further described. The following examples are only used to more clearly illustrate the technical solution of the present invention, and are not intended to limit the protection scope of the present invention.

[0082] like Figure 1-8The preparation device of a bonded alkaline water electrolysis catalyst shown includes a preparation device body, the preparation device body includes a raw material storage unit 1 and a mixed reaction unit 2 arranged in cooperation with the raw material storage unit 1, the mixed reaction unit 2 is connected to a coating device 3, the raw material storage unit 1 includes a nano-catalytic storage tank 4, and the raw material storage unit 1 is also provided with an isobutylene solution storage tank 5, an isoprene solution storage tank 6, a tetrafluoroethylene storage tank 7, a perfluoroalkyl vinyl ether storage tank 8, a vinyl carbonized fluorine storage tank 9 and a hexafluoropropylene storage tank 10 in addition to the nano-catalytic storage tank 4. The preparation device body is also provided with a cleaning unit 18 and a material conveying device 19, and a drying unit 17 is provided at the end of the coating device 3.

[0083] The mixed reaction unit 2 includes a second stirring mixing tank 11, a third mixing stirring mixing tank 12 and a first stirring mixing tank 13. The feed end of the second stirring mixing tank 11 is connected to the vinyl fluoride storage tank 9 and the hexafluoropropylene storage tank 10; the feed end of the third stirring mixing tank is connected to the tetrafluoroethylene storage tank 7 and the perfluoroalkyl vinyl ether storage tank 8, and the feed end of the first stirring mixing tank 13 is connected to the isobutylene solution storage tank 5 and the isoprene solution storage tank 6.

[0084] The coating device 3 includes a material conveyor 14 . A coating port 15 is disposed above the material conveyor 14 . The coating port 15 is provided with a plurality of groups. An infrared coating detector 16 is disposed on one side of the coating port 15 .

[0085] A method for preparing a bonded alkaline water electrolysis catalyst, the method comprising the following steps:

[0086] Step 1: transport any two solutions into corresponding storage tanks through pipelines, and control the transport rate of the solutions through a flow control valve;

[0087] Step 2: transporting the alkaline water electrolysis catalyst into the nanocatalytic storage tank 4 through a pipeline, and controlling the rate of transporting the nanocatalytic storage tank 4 through a flow regulating valve;

[0088] Step 3: Open the flow valves on each pipeline to transport the two solutions into the first stirring and mixing tank 13 through the pipeline;

[0089] Step 4: In the first stirring and mixing tank 13, the alkaline water electrolysis catalyst and the two solutions are stirred and mixed according to the mass ratio of 3.8-4.2:0.7-1.3:0.3-0.7. To ensure uniform mixing, a stirrer is used to stir at an appropriate speed to ensure that all ingredients are fully integrated;

[0090] Step 5: After the stirring and mixing is completed, the discharge valve of the first stirring and mixing tank 13 is opened, and the mixed material is transported to the coating device 3 through the pipeline. The coating device 3 should prepare a nickel mesh electrode in advance and transport it to a suitable coating position through the material conveying device 19;

[0091] Step 6: In the coating device 3, the mixed material is evenly coated on the nickel mesh electrode cleaned by the cleaning unit 18 at an amount of 3-5 mg per square centimeter. During the coating process, ensure that the material is evenly distributed without omission or accumulation;

[0092] Step 7: After the coating is completed, the nickel mesh electrode coated with the material is sent to the drying unit 17. In the drying unit 17, the temperature is set to 70-90° C., and the vacuum pump is turned on to perform a vacuum operation to ensure that the environment during the drying process is dry and oxygen-free;

[0093] Step 8: Drying in the drying unit 17 at a temperature of 70-90° C. for 20-28 hours; during this period, the vacuum degree and temperature should be checked regularly to ensure that the drying process proceeds smoothly;

[0094] Step 9: After the drying is completed, turn off the power supply and vacuum pump of the drying unit 17, and take out the nickel mesh electrode after it is naturally cooled to room temperature;

[0095] Step 10: Bend the removed nickel mesh electrode 90 degrees to check whether the coating has fallen off; at the same time, use a multimeter to detect the resistance of the nickel mesh electrode to ensure that the resistance value meets the requirements.

[0096] The cleaning unit 18 includes an outer frame 20, which serves as a supporting structure for the entire cleaning unit 18. The outer frame 20 is provided with a control box 21. Several groups of cleaning baskets 22 are provided inside the outer frame 20 for accommodating and fixing the nickel mesh electrodes to be cleaned. The outer frame 20 is also provided with several groups of cylinder bodies 23. The cleaning baskets 22 are placed inside the cylinder bodies 23. A bubbling tube 24 and a throwing mechanism 25 are provided at the bottom of the cylinder bodies 23. The throwing mechanism 25 is connected to the cleaning basket 22. A feeding line 26 is provided on one side of the outer frame 20. A multi-arm manipulator 27 is provided above the outer frame 20.

[0097] The workflow of the cleaning unit 18 includes the following steps:

[0098] Step 1: Place the nickel mesh electrodes to be cleaned in the cleaning basket 22 properly; the design of the cleaning basket 22 allows for the electrodes to be accommodated and fixed, ensuring that they do not move or fall off at will during the cleaning process;

[0099] Step 2: Start the feeding line 26, which is located on one side of the outer frame 20 and is responsible for transporting the cleaning baskets 22 equipped with nickel mesh electrodes from the preparation area to the processing area of ​​the ultrasonic cleaning machine. The cleaning baskets 22 are driven by the feeding line 26 to enter the designated cylinder 23 positions one by one;

[0100] Step 3: When the cleaning basket 22 reaches the top of the cylinder 23, the multi-arm manipulator 27 starts to work; the multi-arm manipulator 27 has a high degree of flexibility and precision, and can accurately place the cleaning basket 22 into the cylinder 23. The cleaning basket 22 is securely fixed in the cylinder 23, ready for the next cleaning step;

[0101] Step 4: The bubbling tube starts to work, injects cleaning liquid into the cylinder 23 and generates bubbles; these bubbles rise and burst in the liquid, generating strong ultrasonic vibrations; the ultrasonic vibrations act on the surface of the nickel mesh electrode to remove dirt, grease and other impurities attached thereto; at the same time, the throwing mechanism 25 starts to operate, which is connected to the cleaning basket 22, and enhances the cleaning effect by slightly moving up and down or left and right;

[0102] Step 5: After a certain period of cleaning, the bubbling tube 24 and the throwing mechanism 25 stop working; at this time, the multi-arm robot 27 starts again to take out the cleaning basket 22 that has been cleaned from the cylinder 23; the cleaning basket 22 is then transported by the feeding line 26 to the next processing area or collection point for subsequent drying, inspection or other processing steps.

[0103] The material conveying equipment 19 includes a drying line 28, and the drying line 28 includes a frame 29. A furnace body 30 is arranged above the frame 29, and a wind-moving motor 31 is arranged on the top of the furnace body 30. A belt 32 and a support plate 33 are arranged in the middle section of the frame 29. A heating pipe 34 is arranged above the belt 32 and the support plate 33, and the heating pipe 34 is located below the wind-moving motor 31.

[0104] The working process of the material conveying device 19 comprises the following steps:

[0105] Step 1: Check whether the various components of the drying line 28 are intact, and ensure that the wind motor 31, the heating tube 34, the belt 32 and the support plate 33 can work normally; at the same time, check whether the control system is set correctly to ensure that the drying process can be carried out according to the predetermined parameters;

[0106] Step 2: Turn on the power switch of the control system, start the air conveying motor 31 and the heating tube 34; observe the operation of the drying line 28 to ensure that each component can work normally and adjust to the best state;

[0107] Step 3: Place the nickel mesh electrode to be dried on the belt 32 or the support plate 33, and start the conveying device; adjust the speed of the belt 32 and the power of the heating tube 34 according to the characteristics of the material and the drying requirements;

[0108] Step 4: During the drying process, it is necessary to regularly check the operation of the drying line 28 to ensure that no abnormalities occur; at the same time, observe the drying condition of the material and adjust the power of the heating tube 34 and the speed of the belt 32 as needed to achieve the best drying effect;

[0109] Step 5: After the nickel mesh electrode is initially dried, turn off the heating tube 34 and the air motor 31; wait for the internal temperature of the drying line 28 to drop to a safe range, clean the residue on the belt 32 or the support plate 33, and transport the initially dried nickel mesh electrode to the coating equipment 3 via the belt 32 for coating.

[0110] The drying unit 17 includes a vacuum drying box 35 , and the vacuum drying box 35 includes a box body 36 . A fan 37 is disposed above the box body 36 , and a heating tube 38 is disposed below the fan 37 . The heating tube 38 is disposed in a multi-row structure.

[0111] The workflow of the drying unit 17 includes the following steps:

[0112] Step 1: Use a cart to carry the coated nickel mesh electrode and send the cart into the vacuum drying box 35 in the gold drying unit 17;

[0113] Step 2: Set the temperature of the vacuum drying oven 35 to 70-80° C. and set the baking time to 20-24 hours to ensure that the catalyst and the binder are fully cured;

[0114] Step 3: Close the door of the vacuum drying oven 35, start the vacuum drying oven 35, and start the baking process. During the baking process, regularly check the operating status of the vacuum drying oven 35 to ensure that the baking process proceeds smoothly;

[0115] Step 4: After baking, turn off the power of the vacuum drying oven 35, and open the door of the vacuum drying oven 35 after the internal temperature of the vacuum drying oven 35 drops to a safe range; take out the baked nickel mesh electrode from the cart and perform quality inspection on the baked nickel mesh electrode.

[0116] When the present invention is working, the raw material storage unit 1 is checked to ensure that the raw materials in the nanocatalytic storage tank 4, the isobutylene solution storage tank 5, the isoprene solution storage tank 6, the tetrafluoroethylene storage tank 7, the perfluoroalkyl vinyl ether storage tank 8, the vinyl fluoride carbon storage tank 9 and the hexafluoropropylene storage tank 10 are sufficient and of qualified quality. According to production requirements, the required raw materials are transported to the corresponding storage tanks through the flow regulating valve, and the alkaline water electrolysis catalyst is prepared.

[0117] The mixed reaction unit 2 includes three stirring and mixing tanks: a second stirring and mixing tank 11, a third stirring and mixing tank and a first stirring and mixing tank 13. The feed end of the second stirring and mixing tank 11 is connected to the vinyl fluoride storage tank 9 and the hexafluoropropylene storage tank 10 for mixing the two components. The feed end of the third stirring and mixing tank is connected to the tetrafluoroethylene storage tank 7 and the perfluoroalkyl vinyl ether storage tank 8 for mixing the two components. The feed end of the first stirring and mixing tank 13 is connected to the isobutylene solution storage tank 5 and the isoprene solution storage tank 6 for mixing the two components. Each stirring and mixing tank is equipped with a stirrer to ensure that the raw materials can be fully mixed and uniform.

[0118] The coating device 3 includes a material conveyor 14 for conveying the mixed material to the coating position. A plurality of coating ports 15 are arranged above the material conveyor 14, and each coating port 15 is equipped with an infrared coating detector 16 for detecting the uniformity and thickness of the coating. A vacuum drying unit 17 is arranged at the end of the coating port 15 for drying the nickel mesh electrode after coating.

[0119] Open the flow valves on each pipeline, and transport the two solutions and the alkaline water electrolysis catalyst into the corresponding stirring and mixing tank through the pipeline according to the predetermined mass ratio. Use a stirrer to stir at an appropriate speed to ensure that all ingredients are fully blended. The coating device 3 should prepare the nickel mesh electrode in advance and transport it to the appropriate coating position through the material conveying device 19.

[0120] The nickel mesh electrode is placed in a cleaning basket 22 and transported to the cleaning unit 18 for cleaning via a feeding line 26. During the cleaning process, the bubbling tube 24 and the throwing mechanism 25 work to generate ultrasonic vibrations to remove dirt and grease on the electrode surface.

[0121] After cleaning is completed, the multi-arm robot 27 takes out the cleaning basket 22, and the feeding line 26 transports the cleaning basket 22 to the drying line 28, places the nickel mesh electrode to be dried on the belt 32 or the pallet 33, and starts the conveying device; according to the characteristics of the material and the drying requirements, the speed of the belt 32 and the power of the heating tube 34 are adjusted, and the drying line 28 performs preliminary drying on the nickel mesh electrode after cleaning to make its surface dry and dust-free, and transports the preliminarily dried nickel mesh electrode to the mesh coating equipment 3.

[0122] The mixed material is evenly coated on the nickel mesh electrode cleaned by the cleaning unit 18 at an amount of 3-5 mg per square centimeter. During the coating process, it is necessary to ensure that the material is evenly distributed without omission or accumulation.

[0123] The nickel mesh electrode coated with the material is sent to the drying unit 17. In the drying unit 17, the temperature is set to 70-90°C, and the vacuum pump is turned on to perform vacuum operation to ensure that the environment during the drying process is dry and oxygen-free. Dry at the set temperature for 20-28 hours. During this period, the vacuum degree and temperature should be checked regularly to ensure that the drying process proceeds smoothly. After drying, turn off the power supply and vacuum pump of the drying unit 17, and take out the nickel mesh electrode after it cools naturally to room temperature. Bend the removed nickel mesh electrode 90 degrees to test whether the coating has fallen off. At the same time, use a multimeter to detect the resistance of the nickel mesh electrode to ensure that the resistance value meets the requirements.

[0124] Example 1

[0125] Raw materials preparation:

[0126] Ensure that the raw materials in the nanocatalytic storage tank 4, the isobutylene solution storage tank 5, and the isoprene solution storage tank 6 are sufficient and of qualified quality.

[0127] Mixed reaction:

[0128] The flow valves connecting the isobutylene solution storage tank 5 and the isoprene solution storage tank 6 to the first stirring mixing tank 13 are opened.

[0129] The raw materials are transported into the first stirring mixing tank 13 through a pipeline according to a predetermined mass ratio of nano-scale catalyst: isobutylene: isoprene = 4:1:0.5.

[0130] Use a blender at moderate speed to ensure all ingredients are well incorporated.

[0131] Application:

[0132] The cleaned and preliminarily dried nickel mesh electrode is transported to the coating position through the material conveying device 19. The mixed material is evenly coated on the nickel mesh electrode according to the amount of 4 mg per square centimeter to ensure that the material is evenly distributed without omission or accumulation.

[0133] Drying and testing:

[0134] The nickel mesh electrode coated with the material is sent to the drying unit 17, the temperature is set to 80°C, and the vacuum pump is turned on for vacuum operation. Dry at 80°C for 24 hours, and check the vacuum degree and temperature regularly during the drying. After the drying is completed, turn off the power supply and vacuum pump of the drying unit 17, and take out the nickel mesh electrode after it cools naturally to room temperature. The taken out nickel mesh electrode is bent 90 degrees for testing, and it is found that the coating does not fall off. Use a multimeter to detect the resistance of the nickel mesh electrode, and the resistance value is 0.1 ohms, which meets the requirements.

[0135] Embodiment 2

[0136] Raw materials preparation:

[0137] Ensure that the raw materials in the nano-catalytic storage tank 4, the vinyl fluoride storage tank 9, and the hexafluoropropylene storage tank 10 are sufficient and of qualified quality.

[0138] Mixed reaction:

[0139] Open the flow valve connecting the vinyl fluoride storage tank 9 and the hexafluoropropylene storage tank 10 to the second stirring and mixing tank 11. According to the predetermined mass ratio of nano-scale catalyst: vinyl fluoride: hexafluoropropylene = 4:1:0.5, the raw materials are transported into the second stirring and mixing tank 11 through the pipeline. Use a stirrer to stir to ensure that all the ingredients are fully blended.

[0140] Coating, drying and testing steps:

[0141] The coating, drying and testing steps were the same as those in Example 1. The results also showed that the coating did not fall off and the resistance value was 0.1 ohm.

[0142] Embodiment 3

[0143] Raw materials preparation:

[0144] Ensure that the raw materials in the nanocatalytic storage tank 4, the tetrafluoroethylene storage tank 7, and the perfluoroalkyl vinyl ether storage tank 8 are sufficient and of qualified quality.

[0145] Mixed reaction:

[0146] Open the flow valve connecting the tetrafluoroethylene storage tank 7 and the perfluoroalkyl vinyl ether storage tank 8 to the third stirring and mixing tank. Transport the raw materials into the third stirring and mixing tank through the pipeline according to the predetermined mass ratio of nano-scale catalyst: tetrafluoroethylene: perfluoroalkyl vinyl ether = 4:1:0.5. Use a stirrer to stir to ensure that all ingredients are fully blended.

[0147] Coating, drying and testing steps:

[0148] The coating, drying and testing steps were the same as those in Example 1. The results also showed that the coating did not fall off and the resistance value was 0.1 ohm.

[0149] The present invention is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed in the present invention, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present invention.

Claims

1. A preparation device for bonding alkaline water electrolysis catalyst, comprising a preparation device body, characterized in that: The preparation device body comprises a raw material storage unit (1) and a mixing reaction unit (2) arranged in cooperation with the raw material storage unit (1); the mixing reaction unit (2) is connected to a coating device (3); the raw material storage unit (1) comprises a nanocatalytic storage tank (4); the raw material storage unit (1) is provided with an isobutylene solution storage tank (5), an isoprene solution storage tank (6), a tetrafluoroethylene storage tank (7), a perfluoroalkyl vinyl ether storage tank (8), a vinyl fluoride carbonization storage tank (9) and a hexafluoropropylene storage tank (10) in addition to the nanocatalytic storage tank (4); the preparation device body is also provided with a cleaning unit (18) and a material conveying device (19); and a drying unit (17) is provided at the end of the coating device (3).

2. The preparation device of a bonded alkaline water electrolysis catalyst according to claim 1, characterized in that: The mixing reaction unit (2) comprises a second stirring and mixing tank (11), a third mixing and stirring tank (12) and a first stirring and mixing tank (13); the feed end of the second stirring and mixing tank (11) is connected to a vinyl fluoride storage tank (9) and a hexafluoropropylene storage tank (10); the feed end of the third stirring and mixing tank is connected to a tetrafluoroethylene storage tank (7) and a perfluoroalkyl vinyl ether storage tank (8); and the feed end of the first stirring and mixing tank (13) is connected to an isobutylene solution storage tank (5) and an isoprene solution storage tank (6).

3. The preparation device of a bonded alkaline water electrolysis catalyst according to claim 1, characterized in that: The coating equipment (3) comprises a material conveyor (14), a coating port (15) is arranged above the material conveyor (14), the coating port (15) is provided with a plurality of groups, and an infrared coating detector (16) is arranged on one side of the coating port (15).

4. A method for preparing a bonded alkaline water electrolysis catalyst, characterized in that: The preparation method comprises the following steps: Step 1: transport any two solutions into corresponding storage tanks through pipelines, and control the transport rate of the solutions through a flow control valve; Step 2: transporting the alkaline water electrolysis catalyst into the nanocatalytic storage tank (4) through a pipeline, and controlling the rate of transporting the nanocatalytic storage tank (4) through a flow regulating valve; Step 3: Open the flow valves on each pipeline to transport the two solutions into the first stirring and mixing tank (13) through the pipeline; Step 4: In the first stirring and mixing tank (13), the alkaline water electrolysis catalyst and the two solutions are stirred and mixed according to the mass ratio of 3.8-4.2:0.7-1.3:0.3-0.

7. To ensure uniform mixing, a stirrer is used to stir at an appropriate speed to ensure that all ingredients are fully integrated; Step 5: After the stirring and mixing is completed, the discharge valve of the first stirring and mixing tank (13) is opened, and the mixed material is transported to the coating device (3) through the pipeline. The coating device (3) should be prepared with a nickel mesh electrode in advance and transported to an appropriate coating position through the material conveying device (19); Step 6: In the coating device (3), the mixed material is evenly coated on the nickel mesh electrode cleaned by the cleaning unit (18) at a rate of 3-5 mg per square centimeter. During the coating process, the material is evenly distributed without omission or accumulation. Step 7: After the coating is completed, the nickel mesh electrode coated with the material is sent to the drying unit (17). In the drying unit (17), the temperature is set to 70-90° C., and the vacuum pump is turned on to perform a vacuum operation to ensure that the environment during the drying process is dry and oxygen-free; Step 8: Drying in the drying unit (17) at a temperature of 70-90°C for 20-28 hours; during this period, the vacuum degree and temperature should be checked regularly to ensure that the drying process proceeds smoothly; Step 9: After the drying is completed, turn off the power supply and vacuum pump of the drying unit (17), wait for it to cool naturally to room temperature, and then take out the nickel mesh electrode; Step 10: Bend the removed nickel mesh electrode 90 degrees to check whether the coating has fallen off; at the same time, use a multimeter to detect the resistance of the nickel mesh electrode to ensure that the resistance value meets the requirements.

5. The method for preparing a bonded alkaline water electrolysis catalyst according to claim 4, characterized in that: The cleaning unit (18) comprises an outer frame (20), the outer frame (20) serving as a supporting structure for the entire cleaning unit (18), the outer frame (20) being provided with a control box (21), a plurality of groups of cleaning baskets (22) being provided inside the outer frame (20) for accommodating and fixing the nickel mesh electrodes to be cleaned; the outer frame (20) is also provided with a plurality of groups of cylinder bodies (23), the cleaning baskets (22) being arranged inside the cylinder bodies (23), a bubbling tube (24) and a throwing mechanism (25) being provided at the bottom of the cylinder bodies (23), the throwing mechanism (25) being connected to the cleaning baskets (22), a feeding line (26) being provided on one side of the outer frame (20), and a multi-arm robot (27) being provided above the outer frame (20).

6. The method for preparing a bonded alkaline water electrolysis catalyst according to claim 5, characterized in that: The working process of the cleaning unit (18) comprises the following steps: Step 1: Properly place the nickel mesh electrodes to be cleaned in a cleaning basket (22); the design of the cleaning basket (22) allows for the electrodes to be accommodated and fixed, ensuring that they do not move or fall off at will during the cleaning process; Step 2: Start the feeding line (26), which is located on one side of the outer frame (20) and is responsible for transporting the cleaning baskets (22) equipped with nickel mesh electrodes from the preparation area to the processing area of ​​the ultrasonic cleaning machine. The cleaning baskets (22) are driven by the feeding line (26) to enter the designated cylinder (23) positions one by one; Step 3: When the cleaning basket (22) reaches the top of the cylinder (23), the multi-arm manipulator (27) starts to work; the multi-arm manipulator (27) has a high degree of flexibility and precision, and can accurately place the cleaning basket (22) into the cylinder (23). The cleaning basket (22) is securely fixed in the cylinder (23), ready for the next cleaning step; Step 4: The bubbling tube (24) starts to work, injects cleaning liquid into the cylinder (23) and generates bubbles; these bubbles rise and burst in the liquid, generating strong ultrasonic vibrations; the ultrasonic vibrations act on the surface of the nickel mesh electrode to remove dirt, grease and other impurities attached thereto; at the same time, the throwing mechanism (25) starts to operate, which is connected to the cleaning basket (22) and enhances the cleaning effect by slightly moving up and down or left and right; Step 5: After a certain period of cleaning, the bubbling tube (24) and the throwing mechanism (25) stop working; at this time, the multi-arm robot (27) starts again to take the cleaning basket (22) out of the cylinder (23); the cleaning basket (22) is then transported by the feeding line (26) to the next processing area or collection point for subsequent drying, inspection or other processing steps.

7. The method for preparing a bonded alkaline water electrolysis catalyst according to claim 4, characterized in that: The material conveying equipment (19) comprises a drying line (28), the drying line (28) comprises a frame (29), a furnace body (30) is arranged above the frame (29), a wind-moving motor (31) is arranged on the top of the furnace body (30), a belt (32) and a support plate (33) are arranged in the middle of the frame (29), a heating pipe (34) is arranged above the belt (32) and the support plate (33), and the heating pipe (34) is located below the wind-moving motor (31).

8. The method for preparing a bonded alkaline water electrolysis catalyst according to claim 7, characterized in that: The working process of the material conveying device (19) comprises the following steps: Step 1: Check whether all components of the drying line (28) are intact, and ensure that the fan motor (31), the heating tube (34), the belt (32) and the support plate (33) are functioning properly; at the same time, check whether the control system is correctly set to ensure that the drying process can be carried out according to the predetermined parameters; Step 2: Turn on the power switch of the control system, start the air conveying motor (31) and the heating tube (34); observe the operation of the drying line (28) to ensure that each component can work normally and is adjusted to the optimal state; Step 3: placing the nickel mesh electrode to be dried on the belt (32) or the support plate (33), and starting the conveying device; adjusting the speed of the belt (32) and the power of the heating tube (34) according to the characteristics of the material and the drying requirements; Step 4: During the drying process, it is necessary to regularly check the operation of the drying line (28) to ensure that no abnormalities occur; at the same time, observe the drying condition of the material and adjust the power of the heating tube (34) and the speed of the belt (32) as needed to achieve the best drying effect; Step 5: After the nickel mesh electrode is initially dried, turn off the heating tube (34) and the air conveying motor (31); wait for the internal temperature of the drying line (28) to drop to a safe range, clean the residue on the belt (32) or the support plate (33), and transport the initially dried nickel mesh electrode to the coating device (3) via the belt (32) for coating.

9. The method for preparing a bonded alkaline water electrolysis catalyst according to claim 4, characterized in that: The drying unit (17) comprises a vacuum drying box (35), wherein the vacuum drying box (35) comprises a box body (36), wherein a fan (37) is arranged above the inside of the box body (36), and a heating tube (38) is arranged below the fan (37), wherein the heating tube (38) is arranged in a multi-row structure.

10. The method for preparing a bonded alkaline water electrolysis catalyst according to claim 9, characterized in that: The working process of the drying unit (17) comprises the following steps: Step 1: Use a cart to carry the coated nickel mesh electrode and send the cart into a vacuum drying oven (35) in the gold drying unit (17); Step 2: Setting the temperature of the vacuum drying oven (35) to 70-80°C and the baking time to 20-24 hours to ensure that the catalyst and the binder are fully cured; Step 3: closing the door of the vacuum drying oven (35), starting the vacuum drying oven (35), and starting the baking process. During the baking process, regularly checking the operating status of the vacuum drying oven (35) to ensure that the baking process proceeds smoothly; Step 4: After the baking is completed, turn off the power of the vacuum drying oven (35), wait until the internal temperature of the vacuum drying oven (35) drops to a safe range, and then open the door of the vacuum drying oven (35); take out the baked nickel mesh electrode from the cart, and perform a quality inspection on the baked nickel mesh electrode.

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