CN108521237A - A graphene-based moving bubble power generation device and manufacturing method - Google Patents

Abstract

The present invention relates to a kind of Moving Bubble power generator and manufacturing method based on graphene, when bubble is moved along graphene surface, since the ion around bubble forms electric double layer on the surface of graphene, and carry out charge and discharge electro ultrafiltration in the front end of Moving Bubble and end, then a voltage is generated at the both ends of graphene, the volume of the voltage swing and Moving Bubble is linear, and polarity depends on the direction of Moving Bubble.The voltage that the present invention is generated by the bubble of movement at graphene both ends realizes collection of energy, may further be used to the size of detection bubble motion speed, direction and volume；Single unit system is structurally simple, economical, environmental suitability is strong, can be used as ocean wireless sense network self-power supply device.

Description

A graphene-based moving bubble power generation device and manufacturing method

technical field

The invention relates to a graphene-based moving bubble power generation device and a manufacturing method, and belongs to the technical field of self-power supply for collecting environmental energy.

Background technique

The ocean observation network is a must-have infrastructure for a large ocean country, which can realize all-weather, real-time and high-resolution multi-interface and three-dimensional comprehensive observation from the seabed to the sea surface. Wireless sensor network technology is the foundation of ocean observation network technology. Wireless sensor network is a new generation of sensor network, which integrates sensor technology, embedded computing technology, distributed information processing technology and communication technology. Its application and development will bring great benefits to human beings. It has a profound impact on all areas of production and life. But the power supply problem directly affects its performance and survival time, which is a key problem that limits its practical application. By collecting the energy in the environment for self-supply to supplement the energy consumption of the supply itself, the energy bottleneck can be alleviated to a large extent. The so-called "self-powered" or "energy harvesting" (Self-powered or Energy harvesting) is to convert certain forms of energy (such as light, heat, machinery, electromagnetic, biochemical energy, wind energy, etc.) The application electronic system is powered. Which form of energy is collected and converted into electrical energy depends on the environment in which the sensor is located. Recently, there have been many researches on energy harvesting technology using mechanical vibration and light energy, and the wireless sensor nodes of the ocean observation network are placed in the seawater environment and should collect the energy of seawater flow. Therefore, as the most basic power supply, if more and more stable The power supply method will play a great role in promoting ocean observation.

Contents of the invention

The technical problem to be solved by the present invention is to provide a graphene-based moving bubble power generation device, based on the moving bubbles generated on the surface of graphene, to realize passive power supply and improve power supply efficiency.

The present invention adopts the following technical solutions in order to solve the above technical problems: the present invention designs a graphene-based moving bubble power generation device, including an insulating substrate, a graphene film layer, and positive and negative electrodes; wherein, the graphene film layer covers the insulating On one of the surfaces of the substrate, the positive and negative electrodes are respectively connected to the opposite ends of the graphene film layer; the overall structure composed of the insulating substrate and the graphene film layer is placed in the ionic solution, and the insulating substrate and the graphene film The overall structure of the layer forms an acute angle with the horizontal plane; the positive and negative electrodes are respectively connected to the positive and negative electrodes of the load through wires; based on the movement of the bubbles in the ionic solution on the surface of the graphene film layer, the ions around the bubbles are in the graphene film layer An electric double layer is formed, and charge and discharge are performed at the front and end of the bubble to realize power supply for the load.

As a preferred technical solution of the present invention: the overall structure of the insulating substrate and the graphene film layer is placed in the ionic solution, and the overall structure of the insulating substrate and the graphene film layer forms an included angle of 30 degrees with the horizontal plane.

As a preferred technical solution of the present invention: the insulating substrate is made of any one of glass, quartz, rubber or plastic.

Corresponding to the above, the technical problem to be solved in the present invention is to provide a manufacturing method for a graphene-based moving bubble power generation device, which is also based on generating moving bubbles on the surface of graphene to realize passive power supply work and improve power supply work. efficiency.

The present invention adopts the following technical solutions in order to solve the above-mentioned technical problems: the present invention designs a kind of manufacturing method for the moving bubble power generation device based on graphene, comprises the steps:

Step A. For the insulating substrate, sequentially wash and dry;

Step B. transferring the graphene film layer on one of the surfaces of the insulating substrate;

Step C. connect the two positive and negative electrodes respectively on the two ends opposite to each other on the graphene film layer and connect the wires respectively for the positive and negative two electrodes;

Step D. placing the overall structure of the insulating substrate and the graphene film layer in the ionic solution, and the overall structure of the insulating substrate and the graphene film layer forms an acute angle with the horizontal plane;

Step E. Connect the other ends of the two wires respectively connected to the positive and negative electrodes to the positive and negative electrodes of the load, based on the movement of the bubbles in the ionic solution on the surface of the graphene film layer, the ions around the bubbles form an electric double layer on the graphene film layer , charge and discharge at the front and end of the bubble to realize power supply for the load.

As a preferred technical solution of the present invention: in the step A, the insulating substrate is cleaned with ethanol and ultrapure water, and dried.

As a preferred technical solution of the present invention, the step B includes the following steps:

Step B1. Make a graphene film with one or more layers on the copper foil, and enter step B2;

Step B2. For the surface of the copper foil covered with graphene film, hang-coat 4ωt% polymethyl methacrylate solution, and after volatilization, enter step B3;

Step B3. Place the copper foil covered with the graphene film into the etching solution for immersion until the copper foil is completely dissolved to obtain a graphene-polymethyl methacrylate layer floating on the etching solution, and proceed to step B4;

Step B4. Clean the graphene-polymethyl methacrylate layer, and transfer to one of the surfaces on the insulating substrate, and enter step B5;

Step B5. Use acetone to dissolve and remove the polymethyl methacrylate in the graphene-polymethyl methacrylate layer on the insulating substrate.

As a preferred technical solution of the present invention: in the step B3, the copper foil covered with graphene film is placed in an etching solution with a mass ratio of CuSO ₄ :HCl:H ₂ O =1:5:5 for immersion .

Compared with the prior art, a graphene-based moving bubble power generation device and manufacturing method of the present invention have the following technical effects: the present invention designs a graphene-based moving bubble power generation device, when the bubble moves along the graphene When the surface moves, because the ions around the bubbles form an electric double layer on the surface of the graphene, and charge and discharge at the front and end of the moving bubbles, a voltage is generated at both ends of the graphene, which is the same as the volume of the moving bubbles. In a linear relationship, the polarity depends on the direction of the moving bubbles. Through the voltage generated by the moving bubbles at both ends of the graphene, energy collection is realized, and the passive work of the graphene device part is realized; it can also be used to detect the moving speed of the bubbles, The direction and the size of the volume; in addition, the present invention is designed for the manufacturing method of the moving bubble power generation device based on graphene, the whole process is simple, and is suitable for large-scale production such as surface mounting.

Description of drawings

Fig. 1 is the structural representation of the graphene-based moving bubble power generation device designed by the present invention;

Fig. 2 is a schematic diagram of the voltage change produced by the power generation device designed by the present invention applied to graphene in different inclination angles in Example 1;

Fig. 3 is a schematic diagram of the voltage generated by the power generating device designed in the present invention applied to different volumes of moving bubbles in Example 2;

Fig. 4 is a schematic diagram of the voltage relationship of the power generating device designed in the present invention applied in Embodiment 3.

Among them, 1. insulating substrate, 2. graphene film layer, 3. positive and negative electrodes.

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the present invention designs a graphene-based moving bubble power generation device, which specifically includes an insulating substrate 1, a graphene film layer 2, and positive and negative electrodes 3 in practical applications; wherein, in practical application design, The insulating substrate 1 is made of any one of glass, quartz, rubber or plastic; the graphene film layer 2 is covered on one of the surfaces on the insulating substrate 1, and the positive and negative electrodes 3 are respectively connected to the graphene film layer 2 On the opposite ends of each other; the overall structure of the insulating substrate 1 and the graphene film layer 2 is placed in the ionic solution, and the overall structure of the insulating substrate 1 and the graphene film layer 2 forms an acute angle with the horizontal plane, and the actual In the application, the overall structure composed of the insulating substrate 1 and the graphene film layer 2 is specifically designed to form an angle of 30 degrees with the horizontal plane; the positive and negative electrodes 3 are respectively connected to the positive and negative electrodes of the load through wires; The movement of the surface of the graphene film layer 2, the ions around the bubbles form an electric double layer in the graphene film layer 2, charge and discharge at the front and end of the bubbles, and realize the power supply for the load.

The above-mentioned metal electrode 3 may be gold, silver, copper, titanium, aluminum or platinum, or other highly conductive films, such as indium tin oxide semiconductor transparent conductive film (ITO).

The above-mentioned graphene thin film layer 2 preparation method, the graphene thin film layer 2 can be transferred to the required substrate after being obtained by a large-area growth method, and the large-area growth method that may be used such as chemical vapor deposition (CVD), plasma-enhanced chemical vapor deposition ( PECVD), metal surface epitaxy, etc. The area size of the graphene thin film layer 2 can be several square centimeters to tens of square centimeters according to different application requirements.

The above method for preparing the electrode 3 can be directly coating the conductive glue, or using a standard screen printing process, or a vacuum coating process such as ion sputtering, electron beam evaporation, thermal evaporation or magnetron sputtering.

The above-mentioned liquid types can be any ion-containing liquids such as salt solution, acid solution, and alkali solution.

Specifically, the present invention designs a method for manufacturing a graphene-based moving bubble power generation device. In practical applications, it specifically includes the following steps:

Step A. The insulating substrate 1 is cleaned with ethanol and ultrapure water, and dried.

Step B. Transferring the graphene film layer 2 on one of the surfaces of the insulating substrate 1 .

Wherein, the practical application of step B specifically includes the following steps:

Step B1. Fabricate a graphene film with one or more layers on the copper foil, and proceed to step B2.

In the actual application of the above step B1, the specific operation is: control the flow rate of hydrogen to 20 sccm, the flow rate of argon to 60 sccm, raise the temperature of the tube furnace to 1000 °C at 50 °C/min, and keep it for 10 min when the temperature reaches 1000 °C, so that copper can be reduced Oxide on the foil surface; then adjust the flow rates of hydrogen and argon to 10sccm and 30sccm respectively, and then use a bubbler to feed ethanol and maintain a growth time of 20 min to grow 2D graphene on the surface of copper foil. After the reaction, turn off the bubbler switch, turn off the hydrogen, adjust the argon flow rate to 100 sccm, turn off the tube furnace, and control the cooling rate at about 20°C/min.

Step B2. For the surface of the copper foil covered with graphene film, hang-coat 4ωt% polymethyl methacrylate (PMMA) solution, and after volatilization, proceed to step B3.

Step B3. Place the copper foil covered with the graphene film in an etching solution with a mass ratio of CuSO ₄ :HCl:H ₂ O =1:5:5 for immersion until the copper foil is completely dissolved, and it is obtained floating on the etching solution Graphene-polymethylmethacrylate (PMMA) layer, and proceed to step B4.

Step B4. Clean the graphene-polymethyl methacrylate layer, and transfer it to one of the surfaces on the insulating substrate 1, and proceed to step B5.

Step B5. Using acetone to dissolve and remove the polymethyl methacrylate in the graphene-polymethyl methacrylate (PMMA) layer on the insulating substrate 1 .

Step C. Connect the positive and negative electrodes 3 to the two opposite ends of the graphene film layer 2 and connect wires to the positive and negative electrodes 3 respectively.

Step D. Place the overall structure of the insulating substrate 1 and the graphene film layer 2 in the ionic solution, and the overall structure of the insulating substrate 1 and the graphene film layer 2 forms an acute angle with the horizontal plane.

Step E. The other end of the two wires that are respectively connected to the positive and negative electrodes 3 is connected to the positive and negative poles of the load, based on the movement of the bubbles in the ionic solution on the surface of the graphene film layer 2, the ions around the bubbles form in the graphene film layer 2 The electric double layer is charged and discharged at the front and end of the bubble to realize power supply for the load.

The graphene-based moving bubble power generation device designed by the present invention is applied in the middle of embodiment 1, and the whole structure composed of the insulating substrate 1 and the graphene film layer 2 in the designed moving bubble power generation device is completely immersed in the solution, and there is graphene One side of the film layer 2 faces down, and is placed obliquely at 30 degrees to the horizontal plane. One end of the two electrodes 3 is arranged at the high end, and the other end is at the low end; the positive and negative electrodes 3 at both ends of the graphene film layer 2 are connected to the voltmeter head, Use a bubble generating device to generate bubbles with a volume of 0.8ml. The bubbles move up along the surface of the graphene film layer 2 and are placed at different angles. The corresponding voltage signals measured are shown in Figure 2. It can be seen that the power generation effect is related to the placement angle of the graphene .

Then the graphene-based moving bubble power generation device designed by the present invention is applied to Example 2, and the overall structure composed of the insulating substrate 1 and the graphene film layer 2 in the designed moving bubble power generation device is completely immersed in a fixed angle. In the solution, the voltage signals corresponding to different volumes of moving bubbles are tested respectively, as shown in Figure 3. It can be seen that the power generation effect is related to the volume of the bubbles.

Finally, the graphene-based moving bubble power generation device designed by the present invention is applied in the middle of the embodiment 3, and the overall structure composed of two insulating substrates 1 and graphene film layers 2 of the same size is connected in series, and connected with The horizontal plane forms an angle of 30 degrees and is fully immersed in the solution. The volume of the bubble is 0.8ml. The voltage signal measured is shown in Figure 4. It can be seen that up to 11 millivolts can be generated at both ends of the whole connected by the two graphene film layers 2. The above voltage, it can be seen that the output voltage can be increased by means of series connection.

In this way, the graphene-based moving bubble power generation device designed by the present invention, when the bubbles move along the graphene surface, due to the ions around the bubbles form an electric double layer on the graphene surface, and charge and discharge at the front and end of the moving bubbles , then a voltage is generated at both ends of the graphene, and the magnitude of the voltage is linearly related to the volume of the moving bubble, and the polarity depends on the direction of the moving bubble, and the energy harvesting is realized by the voltage generated at the two ends of the graphene by the moving bubble And realize the passive work of graphene device part; It can also be used to detect the size of bubble movement speed, direction and volume; In addition, the present invention is designed for the manufacturing method of moving bubble power generation device based on graphene, and the whole process is simple , suitable for mass production such as surface mount.

The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and can also be made without departing from the gist of the present invention within the scope of knowledge possessed by those of ordinary skill in the art. Variations.

Claims (7)

1. A moving bubble power generation device based on graphene, characterized in that it includes an insulating substrate (1), a graphene film layer (2) and positive and negative electrodes (3); wherein, the graphene film layer (2) covers It is arranged on one surface of the insulating substrate (1), and the positive and negative electrodes (3) are respectively connected to the opposite ends of the graphene film layer (2); the insulating substrate (1) and the graphene film layer ( 2) The overall structure is placed in the ionic solution, and the overall structure of the insulating substrate (1) and the graphene film layer (2) forms an acute angle with the horizontal plane; the positive and negative electrodes (3) are respectively connected to the load by wires Based on the movement of the bubbles in the ionic solution on the surface of the graphene film layer (2), the ions around the bubbles form an electric double layer on the graphene film layer (2), and charge and discharge at the front and end of the bubbles to achieve Power supply for the load. 2. A graphene-based moving bubble power generation device according to claim 1, characterized in that: the overall structure of the insulating substrate (1) and the graphene film layer (2) is placed in an ionic solution, and the insulating The overall structure formed by the substrate (1) and the graphene film layer (2) forms an included angle of 30 degrees with the horizontal plane. 3. A graphene-based moving bubble power generation device according to claim 1, characterized in that: the insulating substrate (1) is made of any one of glass, quartz, rubber or plastic. 4. A method for manufacturing a graphene-based kinetic bubble power generation device according to any one of claims 1 to 3, characterized in that, comprising the steps of: Step A. For the insulating substrate (1), sequentially wash and dry; Step B. Transferring the graphene film layer (2) on one of the surfaces of the insulating substrate (1); Step C. Connect the positive and negative electrodes (3) to the opposite ends of the graphene film layer (2) respectively, and connect wires to the positive and negative electrodes (3); Step D. Place the overall structure of the insulating substrate (1) and the graphene film layer (2) in the ionic solution, and the overall structure of the insulating substrate (1) and the graphene film layer (2) forms an acute angle with the horizontal plane Angle; Step E. Connect the other ends of the two wires respectively connected to the positive and negative electrodes (3) to the positive and negative electrodes of the load, based on the movement of the bubbles in the ionic solution on the surface of the graphene film layer (2), the ions around the bubbles are on the graphene The thin film layer (2) forms an electric double layer, and charges and discharges are performed at the front and end of the bubbles to realize power supply for the load. 5. A method for manufacturing a graphene-based moving bubble power generation device according to claim 4, characterized in that, in the step A, the insulating substrate (1) is cleaned with ethanol and ultrapure water , and dry. 6. according to claim 4 a kind of manufacturing method for graphene-based moving bubble power generation device, it is characterized in that, described step B comprises the steps: Step B1. Make a graphene film with one or more layers on the copper foil, and enter step B2; Step B2. For the surface of the copper foil covered with graphene film, hang-coat 4ωt% polymethyl methacrylate solution, and after volatilization, enter step B3; Step B3. Place the copper foil covered with the graphene film into the etching solution for immersion until the copper foil is completely dissolved to obtain a graphene-polymethyl methacrylate layer floating on the etching solution, and proceed to step B4; Step B4. Cleaning the graphene-polymethyl methacrylate layer, and transferring it to one of the surfaces on the insulating substrate (1), and proceeding to step B5; Step B5. Use acetone to dissolve and remove the polymethyl methacrylate in the graphene-polymethyl methacrylate layer on the insulating substrate (1). 7. according to claim 6 a kind of manufacturing method for graphene-based moving bubble power generation device, it is characterized in that, in described step B3, the copper foil covered with graphene film is placed in mass ratio and is CuSO ₄ : Soak in an etching solution of HCl:H ₂ O =1:5:5.