Porous graphene film drying and forming device for super capacitor

Abstract

The invention relates to the technical field of graphene film processing, in particular to a porous graphene film drying and forming device for a supercapacitor, which comprises a box body, two clamping plates for clamping a graphene film are arranged in the box body, and a vacuum pump for increasing the vacuum degree in the box body is fixed at the top of the box body; a cavity is formed in the box body, the cavity is filled with water, a water pump for driving water in the cavity to flow circularly is fixed to the top of the box body, a heater for heating the water is installed in the side wall of the box body, and airflow circularly flows in the box body. According to the graphene film drying device, heat exchange is conducted on air flowing in the air inlet pipe and the air outlet pipe through water in the cavity, so that the temperature of the flowing air is increased, uniform drying of the graphene film is facilitated, airflow flows through the two sides of the graphene film, and the airflow is further used for making full contact with the graphene film and taking away water and water vapor on the graphene film.

Description

Technical Field

[0001] This invention relates to the field of graphene film processing technology, and in particular to a drying and film-forming apparatus for porous graphene films used in supercapacitors. Background Technology

[0002] Supercapacitors are energy storage devices, and their electrode materials are crucial. The graphene films used in supercapacitors are primarily thin films made of graphene. Graphene is a two-dimensional carbon-based material with extremely high electrical conductivity, thermal conductivity, and mechanical strength, making it ideally suited for use as an electrode material in supercapacitors.

[0003] The patent with publication number CN210242292U discloses a drying device for graphene films, including a box body. The device is characterized by: a roller 1 and a roller 2 inside the box body, a roller 3 below the roller 1 and a roller 4 below the roller 2, a cylinder on the inner surface of the back plate of the box body, an adjusting plate below the cylinder, and the cylinder being connected to the adjusting plate through a piston rod.

[0004] To prevent oxidation of the graphene film due to high temperatures during the drying process, vacuum drying is employed. This method uses low pressure to lower the boiling point of water, enabling rapid drying of the graphene film at low temperatures. However, during the heating process of the vacuum drying chamber, due to the low thermal conductivity of air, the air in the center of the chamber lags behind the air near the inner wall, resulting in uneven temperature distribution within the chamber. This creates a temperature gradient on the graphene film, leading to uneven drying and internal stress, which in turn causes bending and cracking, ultimately degrading the performance of the capacitor. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as the low thermal conductivity of air causing the air in the center of the container to lag behind the air near the inner wall of the container in temperature rise, resulting in uneven temperature inside the container and a temperature gradient on the graphene film. This leads to uneven drying of the graphene film, causing stress inside the graphene film, resulting in bending and cracking, which in turn leads to a decrease in capacitor performance. The invention proposes a porous graphene film drying and forming device for supercapacitors.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a drying and film-forming device for porous graphene film for supercapacitors, comprising a box, wherein two clamping plates for holding the graphene film are installed inside the box, and a vacuum pump for increasing the vacuum degree inside the box is fixed on the top of the box.

[0007] The box body has an internal chamber filled with water. A water pump is fixed on the top of the box body to drive the water circulation inside the chamber. A heater is installed inside the side wall of the box body to heat the water.

[0008] The enclosure is equipped with an airflow circulation component, which drives the air circulation inside the enclosure to accelerate the transfer of heat from the water to the air. The air circulation also helps to maintain the balance of the air temperature inside the enclosure.

[0009] In a further embodiment, a storage box is fixed to one side of the box body, an air inlet pipe is fixedly connected to the air inlet end of the vacuum pump, the end of the air inlet pipe away from the vacuum pump passes through the side wall of the box body and communicates with the interior of the box body, an air outlet pipe is fixed to the air outlet end of the vacuum pump, the end of the air outlet pipe away from the vacuum pump passes through the side wall of the storage box and communicates with the interior of the storage box, and a connecting pipe is fixedly connected to the inner wall of the storage box, the other end of the connecting pipe is connected to the interior of the box body.

[0010] In a further embodiment, the airflow circulation assembly includes an air pump, which is fixedly installed on the top of the housing. The air outlet of the air pump is fixedly connected to an air outlet pipe. The end of the air outlet pipe away from the air pump passes through the top of the housing and enters the interior of the chamber. Multiple air inlets are provided on the inner wall of the housing, and all multiple air inlets are fixedly connected to the air outlet pipe through pipes.

[0011] The air pump is fixedly connected to an air inlet pipe at its air inlet end. The end of the air inlet pipe away from the air pump passes through the top of the housing and enters the interior of the chamber. Multiple air outlets are provided on the inner wall of the housing, and all multiple air outlets are fixedly connected to the air inlet pipe through pipes.

[0012] In a further embodiment, the air inlet pipe includes a first pipe and a second pipe. The air outlet end of the first pipe is fixedly connected to a drying box, the air outlet end of the drying box is fixedly connected to the second pipe, and the air outlet end of the second pipe is fixedly connected to an air pump.

[0013] The drying chamber contains quicklime. The air outlet of the first pipe extends into the drying chamber and bends downward. Both the air outlet of the first pipe and the air outlet of the drying chamber are fixedly equipped with filter screens.

[0014] In a further embodiment, a cylinder is fixedly installed inside the box, a slide rod is slidably inserted inside the cylinder, a mounting plate is fixed to the top of the slide rod, and clamping plates are symmetrically installed at both ends of the top of the mounting plate.

[0015] In a further embodiment, a hollow plate is fixed to the top of the mounting plate, and sliding plates are slidably inserted into both ends of the hollow plate. The ends of the two sliding plates that are far apart from each other are respectively fixedly connected to the corresponding clamps.

[0016] In a further embodiment, an installation ring is fixed inside the cylinder, and a spring is fixedly connected between the installation ring and the slide rod. Multiple inclined plates for guiding flow are fixed on the side walls of both clamps.

[0017] In a further embodiment, a connecting pipe is fixedly connected to the side wall of the cylinder. The end of the connecting pipe away from the cylinder penetrates the inner wall of the box and enters the interior of the chamber. The end of the connecting pipe located inside the chamber is fixedly connected to the air outlet pipe.

[0018] An installation frame is fixed inside the connecting pipe, and a rotating rod is rotatably connected to the installation frame. A fan blade is fixed to one end of the rotating rod inside the connecting pipe, and a disc is fixed to the other end of the rotating rod inside the cylinder. A connecting rope is rotatably connected to one side of the disc via a pin, and the end of the connecting rope away from the disc is fixedly connected to the bottom of the sliding rod.

[0019] In a further embodiment, a mounting groove is provided on the side wall of the housing, and a heater is fixedly installed inside the mounting groove;

[0020] A water pump is fixed to the top of the housing. The outlet of the water pump is fixedly connected to an outlet pipe. The outlet of the outlet pipe passes through the top of the housing and is fixedly connected to the chamber. The inlet of the water pump is fixedly connected to an inlet pipe. The inlet of the inlet pipe is connected to the bottom of the chamber. A heater is fitted outside the inlet pipe.

[0021] In a further embodiment, a water storage tank is provided at the bottom of the box, a valve is installed inside the water storage tank, and an inclined top plate is fixed at the top of the box.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention uses an airflow circulation component to circulate airflow inside the chamber. The water inside the chamber exchanges heat with the air flowing inside the air inlet and outlet pipes, raising the temperature of the flowing air. This facilitates uniform drying of the graphene film. The airflow passes over both sides of the graphene film and also makes full contact with the graphene film, carrying away moisture and water vapor from the graphene film.

[0024] 2. The present invention uses a vacuum pump to draw gas from inside the box into the storage box. After the gas pressure inside the box is reduced, the sealing of the box door can be increased under the pressure of the external atmospheric pressure. The gas drawn into the storage box can cause the airbag to expand, further increasing the sealing between the box door and the box body.

[0025] 3. By setting the inclined top plate, the water vapor in this invention forms water droplets after contacting the inner wall of the box during the drying process of the graphene film. The inclined top plate can prevent the water droplets from falling onto the graphene film. During the flow of air inside the box, the airflow is also used to blow the water droplets, further accelerating the speed at which the water droplets slide down the inclined surface of the inclined top plate.

[0026] 4. Through the setting of the spring, during the circulation of airflow inside the box, part of the airflow enters the connecting pipe from the air outlet pipe. The airflow flowing from the connecting pipe drives the fan blade to rotate, which, together with the spring, drives the slide rod to move up and down reciprocally, thereby achieving the effect of vibrating the graphene film. During the flow of airflow inside the box, the airflow impacts the inclined plate and exerts a downward thrust on the slide rod, which, together with the spring, further enhances the vibration effect on the graphene film. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the first overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the second overall structure of the present invention;

[0029] Figure 3 This is a cross-sectional view of the box body of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of the clamping plate of the present invention;

[0031] Figure 5 For the present invention Figure 4 Enlarged view of the structure at point A in the middle;

[0032] Figure 6 This is a cross-sectional view of the cylindrical structure of the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of the airbag of the present invention;

[0034] Figure 8 This is a schematic diagram of the heater of the present invention;

[0035] Figure 9 This is a cross-sectional view of the cavity structure of the present invention;

[0036] Figure 10 This is a cross-sectional view of the drying oven of the present invention;

[0037] Figure 11 This is a schematic diagram of the inclined plate of the present invention.

[0038] In the diagram: 1. Box body; 2. Box door; 3. Clamping plate; 4. Chamber; 5. Vacuum pump; 6. Storage box; 7. Connecting pipe; 8. Water pump; 9. Water inlet pipe; 10. Water outlet pipe; 11. Air outlet pipe; 12. Heater; 13. Air pump; 14. Air inlet pipe; 15. Air outlet pipe; 16. Air inlet pipe; 17. Drying oven; 18. Filter screen; 19. Mounting plate; 20. Hollow plate; 21. Slide plate; 22. Cylinder; 23. Slide rod; 24. Mounting ring; 25. Spring; 26. Connecting pipe; 27. Mounting bracket; 28. Rotating rod; 29. ​​Fan blade; 30. Disc; 31. Connecting rope; 32. Inclined top plate; 33. Water storage tank; 34. Inclined plate. Detailed Implementation

[0039] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0040] like Figures 1 to 11 The supercapacitor porous graphene film drying and film forming device shown includes a box 1, two clamping plates 3 for holding the graphene film are installed inside the box 1, and a vacuum pump 5 for increasing the vacuum degree inside the box 1 is fixed on the top of the box 1.

[0041] The interior of the box 1 has a chamber 4, which is filled with water. A water pump 8 is fixed on the top of the box 1 to drive the water inside the chamber 4 to circulate. A heater 12 for heating the water is installed inside the side wall of the box 1.

[0042] An airflow circulation component is installed on the chamber 1 to drive the air circulation inside the chamber 1, accelerate the transfer of heat from the water to the air, and the air circulation also helps to maintain the balance of the air temperature inside the chamber 1.

[0043] It should be noted that the graphene film used in supercapacitors is a porous graphene-based composite film. This type of film can be used directly as a flexible electrode or as a self-supporting current collector to load other high-performance active materials to prepare composite electrode materials.

[0044] When using porous graphene-based composite films to fabricate supercapacitors, the porous graphene-based composite films need to be dried to remove moisture and improve their purity and performance.

[0045] In the specific implementation process, a door 2 is hinged to one side of the enclosure 1, a glass window is fixedly installed on the door 2, and a monitor is fixedly installed on one side of the enclosure 1.

[0046] The top of the box 1 is provided with a water inlet, which is connected to the chamber 4 and is used to fill the chamber 4 with water. The bottom of the box 1 is provided with a water outlet, which is connected to the chamber 4 and is used to drain the water from the chamber 4 after drying.

[0047] Specifically, due to the low thermal conductivity of air, the air in the center of the enclosure 1 will lag behind the air near the inner wall of the enclosure 1 in terms of temperature rise, resulting in uneven temperature inside the enclosure 1. This creates a temperature gradient on the graphene film, leading to uneven drying of the graphene film and stress inside the film, which can cause bending and cracking, ultimately resulting in a decrease in capacitor performance.

[0048] This embodiment of the invention can solve the above problems. The specific implementation method is as follows: First, the staff fills the chamber 4 with water through the water inlet. Then, the staff opens the chamber door 2 and uses the clamping plate 3 to hold the graphene film to be dried. Then, the staff closes the chamber door 2 and starts the vacuum pump 5 to extract the air inside the chamber 1, so that the air pressure inside the chamber 1 decreases. The air pressure value and the corresponding vacuum degree inside the chamber 1 will be displayed on the display. After the vacuum degree inside the chamber 1 reaches the set value, the staff stops the vacuum pump 5 and then starts the heater 12, the water pump 8 and the airflow circulation assembly.

[0049] After the water pump 8 starts, the water inside the chamber 4 is sent to the heating area under the action of the water pump 8. The water is heated by the heater 12 and then enters the interior of the chamber 4. The water pump 8 drives the water inside the chamber 4 to circulate, which helps to maintain the uniform water temperature inside the chamber 4. The water inside the chamber 4 transfers heat to the inner wall of the box 1 through heat conduction. The inner wall of the box 1 then transfers heat to the air inside the box 1, which raises the temperature of the air inside the box 1.

[0050] The airflow circulation component drives the air circulation inside the chamber 1, which on the one hand helps to make the air temperature inside the chamber 1 uniform, and on the other hand, the circulating airflow blows on the surface of the graphene film to remove moisture and accelerate the drying speed of the graphene film.

[0051] In a further implementation process, a storage box 6 is fixed to one side of the box 1, and an air inlet pipe 16 is fixedly connected to the air inlet end of the vacuum pump 5. The end of the air inlet pipe 16 away from the vacuum pump 5 passes through the side wall of the box 1 and communicates with the interior of the box 1. An air outlet pipe 15 is fixed to the air outlet end of the vacuum pump 5. The end of the air outlet pipe 15 away from the vacuum pump 5 passes through the side wall of the storage box 6 and communicates with the interior of the storage box 6. A connecting pipe 7 is fixedly connected to the inner wall of the storage box 6, and the other end of the connecting pipe 7 communicates with the interior of the box 1.

[0052] In the specific implementation process, the bottom of the storage box 6 is fixedly connected to the gas supply pipe, the side wall of the box body 1 is provided with a groove, the inside of the groove is fixed with an air bladder, the end of the air bladder is fixedly connected to the gas supply pipe, and the inside of the connecting pipe 7 is equipped with a solenoid valve.

[0053] Specifically, after the staff starts the vacuum pump 5, the air inside the box 1 flows through the air inlet pipe 16 into the vacuum pump 5, then from the vacuum pump 5 into the air outlet pipe 15, and finally from the air outlet pipe 15 into the storage box 6. As the air inside the box 1 is drawn into the storage box 6 by the vacuum pump 5, the air pressure inside the box 1 decreases. On the one hand, after the air pressure inside the box 1 decreases, the boiling point of the water inside the box 1 decreases, thus evaporating the water quickly at a lower temperature, which helps to prevent the graphene film from undergoing an oxidation reaction due to excessively high temperature. On the other hand, after the air pressure inside the box 1 decreases, under the action of the external atmospheric pressure, the box door 2 is pressed against the side wall of the box 1, which helps to increase the sealing between the box 1 and the box door 2.

[0054] It should be noted that the vacuum pump 5 extracts some gas from the inside of the housing 1, making the internal air pressure of the housing 1 lower than the external atmospheric pressure, thus creating a negative pressure environment. During the operation of the airflow circulation component, the airflow circulation component can also drive the remaining gas inside the housing 1 to flow.

[0055] After the air inside the housing 1 is drawn into the storage tank 6 by the vacuum pump 5, the air pressure inside the storage tank 6 increases. As the air supply pipe connects the storage tank 6 to the airbag, the air pressure inside the airbag increases, causing the airbag to expand, thereby further increasing the sealing between the door 2 and the housing 1.

[0056] After drying, the staff opens the solenoid valve, and the gas inside the storage box 6 enters the interior of the box 1 through the connecting pipe 7, which increases the air pressure inside the box 1, making it easier for the staff to open the box door 2 and take out the dried graphene film.

[0057] In a further implementation process, the airflow circulation component includes an air pump 13, which is fixedly installed on the top of the housing 1. The air outlet end of the air pump 13 is fixedly connected to an air outlet pipe 11. The end of the air outlet pipe 11 away from the air pump 13 passes through the top of the housing 1 and enters the interior of the chamber 4. Multiple air inlets are opened on the inner wall of the housing 1, and the multiple air inlets are fixedly connected to the air outlet pipe 11 through pipes.

[0058] The air pump 13 has an air inlet pipe 14 fixedly connected to its air inlet end. The end of the air inlet pipe 14 away from the air pump 13 passes through the top of the housing 1 and enters the interior of the chamber 4. Multiple air outlets are provided on the inner wall of the housing 1, and all multiple air outlets are fixedly connected to the air inlet pipe 14 through pipes.

[0059] Specifically, after the air pump 13 is started, the air inside the housing 1 enters the air inlet pipe 14 through the air outlet, flows through the air inlet pipe 14 and then enters the air pump 13. The air pump 13 then sends the airflow into the air outlet pipe 11 and into the housing 1 through the multiple air inlets, completing one cycle.

[0060] As the airflow moves inside the housing 1, it flows from the storage box 6 to the housing 1. The airflow passes over both sides of the clamping plate 3 and comes into full contact with both sides of the graphene film being held, which helps the airflow to carry away the moisture on the graphene film.

[0061] During the airflow process inside the air inlet pipe 14, air pump 13 and air outlet pipe 11, the hot water inside the chamber 4 transfers temperature to the air inlet pipe 14 and air outlet pipe 11. This transfer from the inner walls of the air inlet pipe 14 and air outlet pipe 11 to the internal airflow helps to heat the air evenly and fully, making the air temperature inside the chamber 1 uniform. This prevents the graphene film from bending or cracking due to uneven temperature during the drying process.

[0062] In a further implementation process, the air inlet pipe 14 includes a first pipe and a second pipe. The air outlet end of the first pipe is fixedly connected to the drying box 17. The air outlet end of the drying box 17 is fixedly connected to the second pipe. The air outlet end of the second pipe is fixedly connected to the air pump 13.

[0063] The drying chamber 17 contains quicklime. The air outlet of the first pipe extends into the drying chamber 17 and bends downward. Both the air outlet of the first pipe and the air outlet of the drying chamber 17 are fixedly equipped with filter screens 18.

[0064] In the actual process, the interior of the drying oven 17 is a cylindrical chamber, and the interior of the drying oven 17 contains quicklime powder.

[0065] Specifically, during the airflow circulation process, the water vapor generated inside the chamber 1 and the water vapor carried away from the graphene film will enter the air inlet duct 14 with the airflow. After entering the drying chamber 17, the airflow will come into contact with the quicklime contained inside the drying chamber 17, thereby using the quicklime to absorb the water vapor contained in the airflow, which helps to prevent the water vapor from returning to the graphene film with the airflow circulation.

[0066] By bending the first pipe downwards, the airflow enters the interior of the drying chamber 17 and blows downwards onto the quicklime. Through the cylindrical chamber, the airflow can generate vortices inside the drying chamber 17. The generated vortices can blow up the quicklime powder, thereby increasing the contact area between the airflow and the quicklime, which is beneficial for fully absorbing the water vapor in the airflow. The filter screen 18 is provided to prevent the quicklime powder from moving to the outside of the drying chamber 17 with the airflow.

[0067] In a further implementation process, a cylinder 22 is fixedly installed inside the housing 1, a slide rod 23 is slidably inserted inside the cylinder 22, an mounting plate 19 is fixed to the top of the slide rod 23, and clamping plates 3 are symmetrically installed at both ends of the top of the mounting plate 19.

[0068] As an optional embodiment, the top two ends of the mounting plate 19 are provided with sliding grooves, and the bottom of the two clamping plates 3 are fixedly connected with sliders, which are slidably connected in the sliding grooves.

[0069] Specifically, the staff used two clamps 3 to hold the two ends of the graphene film. After the graphene film was held, it was in a vertical position and parallel to the direction of airflow.

[0070] In a further implementation process, a hollow plate 20 is fixed to the top of the mounting plate 19, and sliding plates 21 are slidably inserted into both ends of the hollow plate 20. The ends of the two sliding plates 21 that are far apart from each other are respectively fixedly connected to the corresponding clamping plates 3.

[0071] It should be noted that after a negative pressure environment is formed inside the box 1, the air pressure inside the hollow plate 20 is higher than that inside the box 1. The pressure difference is used to push the two sliding plates 21 to move the two clamping plates 3 in a direction away from each other, thereby achieving the purpose of straightening the graphene film. During this process, the sliding groove and the slider slide relative to each other.

[0072] Specifically, after the vacuum pump 5 extracts part of the air from inside the chamber 1, the air pressure inside the chamber 1 decreases, and the air pressure inside the hollow plate 20 is greater than the air pressure inside the chamber 1. As a result, the two sliding plates 21 move outward from the hollow plate 20 under the action of air pressure. The two sliding plates 21 push the corresponding clamping plates 3 to move, which helps to tighten the graphene film clamped between the two clamping plates 3 and prevents the graphene film from bending during the drying process.

[0073] In further implementation, an installation ring 24 is fixed inside the cylinder 22, and a spring 25 is fixedly connected between the installation ring 24 and the slide rod 23. Multiple inclined plates 34 for guiding flow are fixed on the side walls of the two clamping plates 3.

[0074] Specifically, as the airflow circulates from the storage box 6 to the box body 1, the airflow impacts the inclined surface of the inclined plate 34. Through the force of the airflow, the clamping plate 3 has a downward thrust, which acts on the spring 25, causing the spring 25 to be compressed downward. Since the force of the airflow acting on the inclined plate 34 is unstable, the spring 25 returns to its original position under the action of the elastic force after being compressed downward, thereby generating a vibration effect on the clamping plate 3, which is conducive to the evaporation and overflow of moisture inside the graphene film.

[0075] In a further implementation process, a connecting pipe 26 is fixedly connected to the side wall of the cylinder 22. The end of the connecting pipe 26 away from the cylinder 22 penetrates the inner wall of the box 1 and enters the interior of the chamber 4. The end of the connecting pipe 26 located inside the chamber 4 is fixedly connected to the air outlet pipe 11.

[0076] A mounting bracket 27 is fixed inside the connecting pipe 26. A rotating rod 28 is rotatably connected to the mounting bracket 27. A fan blade 29 is fixed to one end of the rotating rod 28 inside the connecting pipe 26. A disc 30 is fixed to one end of the rotating rod 28 inside the cylinder 22. A connecting rope 31 is rotatably connected to one side of the disc 30 through a pin. The end of the connecting rope 31 away from the disc 30 is fixedly connected to the bottom of the slide rod 23.

[0077] In the specific implementation process, an opening is provided on one side of the cylinder 22.

[0078] Specifically, during the airflow circulation process, some airflow enters the connecting pipe 26 from the air outlet 11, and then enters the interior of the cylinder 22 from the connecting pipe 26, and then enters the interior of the box 1 through the opening.

[0079] As the airflow flows inside the connecting pipe 26, it drives the fan blade 29 to rotate. The fan blade 29 drives the rotating rod 28 to rotate, which in turn drives the disc 30 to rotate. The rotation of the disc 30 drives the connecting rope 31 to move via the pin. The connecting rope 31 pulls the slide rod 23 downward to compress the spring 25. As the disc 30 drives the pin to move upward, the elastic force of the spring 25 pushes the slide rod 23 upward. The reciprocating movement of the slide rod 23 vibrates the graphene film, which facilitates the evaporation and overflow of moisture inside the graphene film, thus increasing the drying rate of the graphene film.

[0080] In a further implementation process, an installation groove is provided on the side wall of the housing 1, and a heater 12 is fixedly installed inside the installation groove;

[0081] A water pump 8 is fixed to the top of the housing 1. The outlet end of the water pump 8 is fixedly connected to an outlet pipe 10. The outlet end of the outlet pipe 10 passes through the top of the housing 1 and is fixedly connected to the chamber 4. The inlet end of the water pump 8 is fixedly connected to an inlet pipe 9. The inlet end of the inlet pipe 9 is connected to the bottom of the chamber 4. The heater 12 is sleeved on the outside of the inlet pipe 9.

[0082] Specifically, after the water pump 8 starts, the water inside the chamber 4 is drawn in from the inlet end of the inlet pipe 9 under the action of the water pump 8, and then sent to the top of the chamber 4 from the outlet pipe 10, thus completing the circulation of the water inside the chamber 4.

[0083] As the water flows inside the inlet pipe 9, the heater 12 heats the inlet pipe 9. Then, the inlet pipe 9 transfers heat to the water flowing inside the inlet pipe 9, so that the water temperature inside the inlet pipe 9 rises. Then, under the action of the water pump 8, the water inside the chamber 4 is heated through the circulation of water flow, so that the water temperature inside the chamber 4 is kept stable.

[0084] In further implementation, a water storage tank 33 is provided at the bottom of the box 1, and a valve is installed inside the water storage tank 33. An inclined top plate 32 is fixed to the top of the box 1.

[0085] Specifically, when water vapor inside the chamber 1 comes into contact with the inner wall of the chamber 1, it may produce water droplets that adhere to the inner wall of the chamber 1. Through the inclined top plate 32, the water droplets adhering to the inclined top plate 32 will flow along the inclined surface of the inclined top plate 32 to the side wall of the chamber 1, and then flow along the side wall of the chamber 1 into the water storage tank 33 inside the chamber 1. This can prevent water droplets from falling onto the graphene film. During the airflow inside the chamber 1, the water droplets adhering to the inclined top plate 32 are more easily flowed along the inclined surface of the inclined top plate 32 under the blowing of the airflow. After drying, the staff opens the valve at the bottom of the water storage tank 33 to drain the water in the water storage tank 33.

[0086] Working principle of this invention:

[0087] When using this invention, firstly, the operator fills the interior of chamber 4 with water, then opens the door 2, uses clamps 3 to hold the graphene film, then closes the door 2, and starts the vacuum pump 5 to draw the gas inside the chamber 1 into the storage box 6. After the gas pressure inside the chamber 1 decreases, the sealing of the door 2 is increased under the pressure of the external atmospheric pressure. The gas drawn into the storage box 6 causes the airbag to expand, further increasing the sealing between the door 2 and the chamber 1.

[0088] After the vacuum level inside chamber 1 reaches the set value, the vacuum pump 5 is turned off and the water pump 8, heater 12 and air pump 13 are started. After the water pump 8 is started, it drives the water inside chamber 4 to circulate. The heater 12 heats the water inlet pipe 9. Then the water inlet pipe 9 transfers heat to the water flowing in the water in the water inlet pipe 9, which raises the water temperature and keeps the water temperature inside chamber 4 stable under the action of the water pump 8.

[0089] Under the action of the air pump 13, the airflow circulates inside the box 1. The water inside the chamber 4 exchanges heat with the air flowing inside the air inlet pipe 14 and the air outlet pipe 11, which raises the temperature of the flowing air, thus facilitating the uniform drying of the graphene film. The airflow flows over both sides of the graphene film and is also used to make full contact with the graphene film and carry away the moisture and water vapor on the graphene film.

[0090] During the drying process of the graphene film, the floating water vapor comes into contact with the inner wall of the box 1 and forms water droplets that adhere to the inner wall of the box 1. Through the drainage effect of the inclined top plate 32, the water droplets can be prevented from falling onto the graphene film. During the flow of air inside the box 1, the airflow is also used to blow the water droplets, further accelerating the speed at which the water droplets slide down the inclined surface of the inclined top plate 32.

[0091] During the circulation of airflow inside chamber 1, the temperature of the airflow is kept stable by the hot water inside chamber 4. The airflow flows from both sides of the graphene mold and makes full contact with the graphene film, carrying away the moisture on the graphene film. The airflow carrying water vapor passes through the interior of drying chamber 17 and makes full contact with quicklime powder inside drying chamber 17, using quicklime powder to absorb the water vapor.

[0092] During the circulation of airflow inside the housing 1, some airflow enters the connecting pipe 26 from the air outlet 11. The airflow flowing from the connecting pipe 26 drives the fan blade 29 to rotate, which, in conjunction with the spring 25, drives the slide rod 23 to move up and down repeatedly, thereby achieving the effect of vibrating the graphene film. During the flow of airflow inside the housing 1, the airflow impacts the inclined plate 34, which exerts a downward pushing force on the slide rod 23, further enhancing the vibration effect on the graphene film in conjunction with the spring 25.

[0093] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A device for drying and forming porous graphene films for supercapacitors, comprising a housing (1), characterized in that, The box (1) is equipped with two clamping plates (3) for holding the graphene film, and a vacuum pump (5) for increasing the vacuum level inside the box (1) is fixed on the top of the box (1). The box (1) has a chamber (4) inside, which is filled with water. A water pump (8) is fixed on the top of the box (1) to drive the water inside the chamber (4) to circulate. A heater (12) for heating water is installed inside the side wall of the box (1). The box (1) is equipped with an airflow circulation component, which is used to drive the air circulation inside the box (1) to accelerate the transfer of heat from the water to the air. The air circulation is also used to maintain the air temperature balance inside the box (1).

2. The apparatus for drying and forming porous graphene films for supercapacitors according to claim 1, characterized in that, A storage box (6) is fixed on one side of the box (1). An air inlet pipe (16) is fixedly connected to the air inlet end of the vacuum pump (5). The end of the air inlet pipe (16) away from the vacuum pump (5) passes through the side wall of the box (1) and communicates with the interior of the box (1). An air outlet pipe (15) is fixed to the air outlet end of the vacuum pump (5). The end of the air outlet pipe (15) away from the vacuum pump (5) passes through the side wall of the storage box (6) and communicates with the interior of the storage box (6). A connecting pipe (7) is fixedly connected to the inner wall of the storage box (6). The other end of the connecting pipe (7) communicates with the interior of the box (1).

3. The apparatus for drying and forming porous graphene films for supercapacitors according to claim 1, characterized in that, The airflow circulation assembly includes an air pump (13), which is fixedly installed on the top of the housing (1). The air outlet of the air pump (13) is fixedly connected to an air outlet pipe (11). The end of the air outlet pipe (11) away from the air pump (13) passes through the top of the housing (1) and enters the interior of the chamber (4). Multiple air inlets are provided on the inner wall of the housing (1), and all multiple air inlets are fixedly connected to the air outlet pipe (11) through pipes. The air pump (13) has an air inlet pipe (14) fixedly connected to its air inlet end. The end of the air inlet pipe (14) away from the air pump (13) passes through the top of the box (1) and enters the interior of the chamber (4). Multiple air outlets are provided on the inner wall of the box (1), and all multiple air outlets are fixedly connected to the air inlet pipe (14) through pipes.

4. The apparatus for drying and forming porous graphene films for supercapacitors according to claim 3, characterized in that, The air inlet pipe (14) includes a first pipe and a second pipe. The air outlet end of the first pipe is fixedly connected to a drying box (17). The air outlet end of the drying box (17) is fixedly connected to the second pipe. The air outlet end of the second pipe is fixedly connected to an air pump (13). The drying box (17) contains quicklime. The air outlet of the first pipe extends into the drying box (17) and bends downward. Both the air outlet of the first pipe and the air outlet of the drying box (17) are fixedly equipped with filter screens (18).

5. The apparatus for drying and forming porous graphene films for supercapacitors according to claim 1, characterized in that, A cylinder (22) is fixedly installed inside the box (1). A slide rod (23) is slidably inserted inside the cylinder (22). A mounting plate (19) is fixed to the top of the slide rod (23). Clamping plates (3) are symmetrically installed at both ends of the top of the mounting plate (19).

6. The apparatus for drying and forming porous graphene films for supercapacitors according to claim 5, characterized in that, The top of the mounting plate (19) is fixed with a hollow plate (20), and both ends of the hollow plate (20) are slidably inserted with sliding plates (21). The ends of the two sliding plates (21) that are far apart from each other are respectively fixedly connected to the corresponding clamps (3).

7. The apparatus for drying and forming porous graphene films for supercapacitors according to claim 6, characterized in that, An installation ring (24) is fixed inside the cylinder (22), and a spring (25) is fixedly connected between the installation ring (24) and the slide rod (23). Multiple inclined plates (34) for guiding flow are fixed on the side walls of the two clamps (3).

8. The apparatus for drying and forming porous graphene films for supercapacitors according to claim 7, characterized in that, A connecting pipe (26) is fixedly connected to the side wall of the cylinder (22). The end of the connecting pipe (26) away from the cylinder (22) penetrates the inner wall of the box (1) and enters the interior of the chamber (4). The end of the connecting pipe (26) located inside the chamber (4) is fixedly connected to the air outlet pipe (11). The connecting tube (26) is fixed with a mounting bracket (27), and a rotating rod (28) is rotatably connected to the mounting bracket (27). A fan blade (29) is fixed at one end of the rotating rod (28) inside the connecting tube (26), and a disc (30) is fixed at one end of the rotating rod (28) inside the cylinder (22). A connecting rope (31) is rotatably connected to one side of the disc (30) through a pin. The end of the connecting rope (31) away from the disc (30) is fixedly connected to the bottom of the slide rod (23).

9. The apparatus for drying and forming porous graphene films for supercapacitors according to claim 1, characterized in that, The side wall of the box (1) is provided with an installation groove, and a heater (12) is fixedly installed inside the installation groove; A water pump (8) is fixed to the top of the housing (1). The outlet end of the water pump (8) is fixedly connected to an outlet pipe (10). The outlet end of the outlet pipe (10) passes through the top of the housing (1) and is fixedly connected to the chamber (4). The inlet end of the water pump (8) is fixedly connected to an inlet pipe (9). The inlet end of the inlet pipe (9) is connected to the bottom of the chamber (4). The heater (12) is sleeved on the outside of the inlet pipe (9).

10. The apparatus for drying and forming porous graphene films for supercapacitors according to claim 1, characterized in that, The bottom of the box (1) is provided with a water storage tank (33), and a valve is installed inside the water storage tank (33). An inclined top plate (32) is fixed inside the top of the box (1).

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