CN108521237B - A kind of graphene-based moving bubble power generation device and manufacturing method - Google Patents
A kind of graphene-based moving bubble power generation device and manufacturing method Download PDFInfo
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Abstract
本发明涉及一种基于石墨烯的运动气泡发电装置及制造方法，当气泡沿石墨烯表面运动时，由于气泡周围的离子在石墨烯表面形成双电层，并在运动气泡的前端和末端进行充放电作用，则在石墨烯的两端产生一个电压，该电压大小与运动气泡的体积成线性关系，极性取决于运动气泡的方向。本发明通过运动的气泡在石墨烯两端产生的电压，实现能量收集，还可用来检测气泡运动速度、方向及体积的大小；整体装置结构简单、经济、环境适应性强，可作为海洋无线传感网自供电装置。
The invention relates to a graphene-based moving bubble power generation device and a manufacturing method. When the bubble moves along the graphene surface, an electric double layer is formed on the graphene surface due to the ions around the bubble, and the front and the end of the moving bubble are charged. The discharge action generates a voltage at both ends of the graphene, the magnitude of which is linearly related to the volume of the moving bubble, and the polarity depends on the direction of the moving bubble. The invention realizes energy collection through the voltage generated by the moving bubbles at both ends of graphene, and can also be used to detect the moving speed, direction and volume of the bubbles; the overall device has a simple structure, is economical, and has strong environmental adaptability, and can be used as an ocean wireless transmitter. Sense network self-powered device.
Description
Technical Field
The invention relates to a moving bubble power generation device based on graphene and a manufacturing method thereof, and belongs to the technical field of self power supply for collecting environmental energy.
Background
The marine observation network is an infrastructure which must be provided by oceans, and can realize all-weather, real-time and high-resolution multi-interface three-dimensional comprehensive observation from the sea bottom to the sea surface. The wireless sensor network technology is the basis of the marine observation network technology, the wireless sensor network is a new generation of sensor network, the sensor technology, the embedded computing technology, the distributed information processing technology and the communication technology are integrated, and the application and the development of the wireless sensor network technology can bring far-reaching influence on various fields of human production and life. But the power supply problem directly affects the performance and the survival time of the power supply and is a critical problem limiting the practical application of the power supply. Energy bottlenecks can be relieved to a great extent by self-powering to supplement energy consumption supplied to the environment through energy collection in the environment. So-called "Self-powered" or "Energy harvesting" is to convert some forms of Energy (such as light, heat, mechanical, electromagnetic, biochemical Energy, wind Energy, etc.) present in the environment into electrical Energy for powering electronic systems. Which form of energy is collected and converted into electrical energy depends on the environment in which the sensor is located. In the future, researches are more on energy collection technologies by utilizing mechanical vibration and optical energy, and wireless sensor nodes of a marine observation network are placed in a seawater environment and are required to collect flowing energy of seawater, so that the wireless sensor nodes serve as the most basic power supply and can provide more and more stable power supply modes to play a great role in promoting marine observation.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a moving bubble power generation device based on graphene, which realizes passive power supply work and improves power supply work efficiency based on moving bubbles generated on the surface of the graphene.
The invention adopts the following technical scheme for solving the technical problems: the invention designs a moving bubble power generation device based on graphene, which comprises an insulating substrate, a graphene film layer and a positive electrode and a negative electrode; the graphene film layer covers one surface of the insulating substrate, and the positive electrode and the negative electrode are respectively connected to two opposite ends of the graphene film layer; the integrated structure formed by the insulating substrate and the graphene film layer is placed in the ionic solution, and an acute included angle is formed between the integrated structure formed by the insulating substrate and the graphene film layer and the horizontal plane; the positive and negative electrodes are respectively connected with the positive and negative electrodes of the load through leads; based on the movement of bubbles in the ionic solution on the surface of the graphene thin film layer, ions around the bubbles form an electric double layer on the graphene thin film layer, and the front end and the tail end of the bubbles are charged and discharged, so that power supply for a load is realized.
As a preferred technical scheme of the invention: the integrated structure formed by the insulating substrate and the graphene film layer is placed in the ionic solution, and an included angle of 30 degrees is formed between the integrated structure formed by the insulating substrate and the graphene film layer and the horizontal plane.
As a preferred technical scheme of the invention: the insulating substrate is made of any one of glass, quartz, rubber or plastic.
In view of the above, the technical problem to be solved by the present invention is to provide a method for manufacturing a moving bubble power generation device based on graphene, which also realizes passive power supply work based on moving bubbles generated on the surface of graphene, and improves power supply work efficiency.
The invention adopts the following technical scheme for solving the technical problems: the invention designs a manufacturing method for a moving bubble power generation device based on graphene, which comprises the following steps:
step A, aiming at the insulating substrate, sequentially cleaning and drying;
b, transferring the graphene film layer on one surface of the insulating substrate;
c, respectively connecting the positive electrode and the negative electrode at two opposite ends of the graphene film layer and respectively connecting a lead aiming at the positive electrode and the negative electrode;
d, placing the integral structure formed by the insulating substrate and the graphene film layer in an ionic solution, wherein an acute included angle is formed between the integral structure formed by the insulating substrate and the graphene film layer and a horizontal plane;
and E, connecting the other ends of the two leads respectively connected with the positive electrode and the negative electrode of the load, forming an electric double layer on the graphene film layer by ions around the bubbles based on the movement of the bubbles in the ionic solution on the surface of the graphene film layer, and performing charge and discharge at the front end and the tail end of the bubbles to realize power supply for the load.
As a preferred technical scheme of the invention: and in the step A, cleaning the insulating substrate by adopting ethanol and ultrapure water, and drying.
As a preferred technical solution of the present invention, the step B includes the steps of:
b1, manufacturing a graphene film with 1 or more layers on a copper foil, and entering step B2;
b2, hanging and coating a 4 omega t% polymethyl methacrylate solution on the surface of the copper foil covered with the graphene film, and entering the step B3 after the polymethyl methacrylate solution is volatilized;
step B3, placing the copper foil covered with the graphene film in an etching solution for soaking until the copper foil is completely dissolved to obtain a graphene-polymethyl methacrylate layer floating on the etching solution, and entering step B4;
step B4., cleaning the graphene-polymethyl methacrylate layer, transferring the graphene-polymethyl methacrylate layer to one surface of the insulating substrate, and performing step B5;
step B5. uses acetone to dissolve and remove the polymethylmethacrylate in the graphene-polymethylmethacrylate layer on the insulating substrate.
As a preferred technical scheme of the invention: in the step B3, the copper foil covered with the graphene film is placed in a mass ratio of CuSO4:HCl:H2Soaking in an etching solution with the ratio of O to O being 1:5: 5.
Compared with the prior art, the moving bubble power generation device based on graphene and the manufacturing method thereof have the following technical effects that: according to the moving bubble power generation device based on the graphene, when bubbles move along the surface of the graphene, double electric layers are formed on the surface of the graphene by ions around the bubbles, and charging and discharging actions are carried out at the front end and the tail end of the moving bubbles, a voltage is generated at two ends of the graphene, the voltage and the volume of the moving bubbles are in a linear relation, the polarity depends on the direction of the moving bubbles, energy collection is realized through the voltage generated at the two ends of the graphene by the moving bubbles, and passive work of a graphene device part is realized; the device can also be used for detecting the moving speed, the moving direction and the size of the bubble; in addition, the manufacturing method for the moving bubble power generation device based on the graphene is simple in whole process and suitable for large-scale production such as surface mounting.
Drawings
FIG. 1 is a schematic structural diagram of a moving bubble power generation device based on graphene according to the present invention;
FIG. 2 is a schematic diagram of the voltage variation generated by the moving bubbles of graphene at different tilt angles in example 1;
FIG. 3 is a schematic diagram of the power generation device designed according to the present invention applied to the generation voltage of bubbles moving in different volumes in example 2;
FIG. 4 is a schematic diagram of the voltage relationship of the power generation device designed according to the present invention applied to embodiment 3.
The graphene film layer is formed by a graphene film layer and an insulating substrate, wherein 1, the insulating substrate, 2, the graphene film layer and 3, the electrode.
Detailed Description
The following description will explain embodiments of the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 1, the invention designs a moving bubble power generation device based on graphene, which in practical application specifically comprises an insulating substrate 1, a graphene film layer 2 and a positive electrode and a negative electrode 3; 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 surface of the insulating substrate 1, and the positive electrode 3 and the negative electrode 3 are respectively connected to two opposite ends of the graphene film layer 2; the integrated structure formed by the insulating substrate 1 and the graphene film layer 2 is placed in an ionic solution, and the integrated structure formed by the insulating substrate 1 and the graphene film layer 2 and a horizontal plane form an acute included angle, and in practical application, the integrated structure formed by the insulating substrate 1 and the graphene film layer 2 and the horizontal plane form a 30-degree included angle in a specific design; the positive and negative electrodes 3 are respectively connected with the positive and negative electrodes of the load through leads; based on the movement of bubbles in the ionic solution on the surface of the graphene thin film layer 2, ions around the bubbles form an electric double layer on the graphene thin film layer 2, and the front end and the tail end of the bubbles are charged and discharged, so that power supply for a load is realized.
The metal electrode 3 may be gold, silver, copper, titanium, aluminum, or platinum, or other highly conductive thin film such as an indium tin oxide semiconductor transparent conductive film (ITO).
In the preparation method of the graphene thin film layer 2, the graphene thin film layer 2 can be obtained by a large-area growth method and then transferred to a required substrate, and the large-area growth method which may be used is Chemical Vapor Deposition (CVD), Plasma Enhanced Chemical Vapor Deposition (PECVD), metal surface epitaxy, or the like. The area size of the graphene thin film layer 2 may be several square centimeters to several tens of square centimeters according to application requirements.
The method for preparing the electrode 3 can be directly coating the conductive adhesive, and can also use a standard screen printing process, or a vacuum coating process such as ion sputtering, electron beam evaporation, thermal evaporation or magnetron sputtering.
The liquid can be any ionic liquid such as salt solution, acid solution, alkali solution, etc.
Specifically, the invention designs a manufacturing method for a moving bubble power generation device based on graphene, and in practical application, the manufacturing method specifically comprises the following steps:
and step A, cleaning the insulating substrate 1 by adopting ethanol and ultrapure water, and drying.
And B, transferring the graphene film layer 2 on one surface of the insulating substrate 1.
Wherein, in the practical application of the step B, the following steps are specifically included:
and B1, manufacturing a graphene film with 1 or more layers on the copper foil, and entering the step B2.
In the practical application of step B1, the specific operations are as follows: controlling the hydrogen flow rate to be 20sccm and the argon flow rate to be 60sccm, heating the tubular furnace to 1000 ℃ at a speed of 50 ℃/min, and keeping the temperature for 10min when the temperature reaches 1000 ℃, so that the oxide on the surface of the copper foil can be reduced; and then adjusting the flow rates of hydrogen and argon to be 10sccm and 30sccm respectively, then introducing ethanol by using a bubbler, and maintaining the growth time for 20min, so as to grow 2D graphene on the surface of the copper foil. After the reaction is finished, the switch of the bubbler is closed, the hydrogen is closed, the argon flow is adjusted to 100sccm at a high speed, the tubular furnace is closed, and the cooling rate is controlled to be about 20 ℃/min.
And B2, hanging and coating a 4 omega t% polymethyl methacrylate (PMMA) solution on the surface of the copper foil covered with the graphene film, and entering the step B3 after the PMMA solution is volatilized.
B3, placing the copper foil covered with the graphene film in a mass ratio of CuSO4:HCl:H2Soaking in an etching solution with a ratio of O to 1:5:5 until the copper foil is completely dissolved to obtain a graphene-polymethyl methacrylate (PMMA) layer floating on the etching solution, and proceeding to step B4.
Step B4. is performed for the graphene-polymethylmethacrylate layer to be cleaned and transferred to one of the surfaces on the insulating substrate 1 and proceeds to step B5.
Step B5. uses acetone to dissolve and remove the poly (methyl methacrylate) in the graphene-poly (methyl methacrylate) (PMMA) layer on the insulating substrate 1.
And C, respectively connecting the two opposite ends of the graphene film layer 2 with the positive and negative electrodes 3 and respectively connecting a lead aiming at the positive and negative electrodes 3.
And D, placing the integral structure formed by the insulating substrate 1 and the graphene film layer 2 in an ionic solution, wherein the integral structure formed by the insulating substrate 1 and the graphene film layer 2 and a horizontal plane form an acute included angle.
And E, connecting the other ends of the two leads respectively connected with the positive electrode and the negative electrode 3 with the positive electrode and the negative electrode of the load, forming an electric double layer on the graphene film layer 2 by ions around the bubbles based on the movement of the bubbles in the ionic solution on the surface of the graphene film layer 2, and performing charge and discharge at the front end and the tail end of the bubbles to realize power supply for the load.
The moving bubble power generation device based on graphene is applied to the embodiment 1, the whole structure formed by the insulating substrate 1 and the graphene film layer 2 in the moving bubble power generation device is completely immersed in a solution, one surface with the graphene film layer 2 faces downwards and is obliquely placed at an angle of 30 degrees with the horizontal plane, one end of each of the two electrodes 3 is arranged at the high end, and the other end of each of the two electrodes is arranged at the low end; the positive and negative electrodes 3 at the two ends of the graphene film layer 2 are connected with a voltmeter head, a bubble generating device is used for generating bubbles with the volume of 0.8ml, the bubbles move upwards along the surface of the graphene film layer 2 and are placed at different angles, the measured corresponding voltage signals are shown in a graph 2, and the power generation effect is related to the placing angle of the graphene.
Then, the moving bubble power generation device based on graphene is applied to the embodiment 2, the whole structure formed by the insulating substrate 1 and the graphene film layer 2 in the moving bubble power generation device is completely immersed in the solution at a fixed angle, voltage signals corresponding to moving bubbles with different volumes are respectively tested, and the power generation effect is related to the volume of the bubbles as shown in fig. 3.
Finally, the moving bubble power generation device based on graphene is applied to the embodiment 3, aiming at the overall structure formed by 2 insulating substrates 1 and graphene thin film layers 2 with the same size, the moving bubble power generation device is connected in series, the moving bubble power generation device forms an angle of 30 degrees with the horizontal plane and is completely immersed in the solution, the volume of a vapor bubble is 0.8ml, the measured voltage signal is shown in a figure 4, the voltage of more than 11 millivolts can be generated at the two ends of the overall structure formed by the 2 graphene thin film layers 2, and the output voltage can be improved by adopting the series connection mode.
Therefore, when the bubbles move along the surface of the graphene, double electric layers are formed on the surface of the graphene by ions around the bubbles, and the front end and the tail end of the moving bubbles are charged and discharged, so that a voltage is generated at two ends of the graphene, the voltage magnitude and the volume of the moving bubbles are in a linear relation, the polarity depends on the direction of the moving bubbles, energy collection is realized through the voltage generated at the two ends of the graphene by the moving bubbles, and the passive work of a graphene device part is realized; the device can also be used for detecting the moving speed, the moving direction and the size of the bubble; in addition, the manufacturing method for the moving bubble power generation device based on the graphene is simple in whole process and suitable for large-scale production such as surface mounting.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (7)
1. The utility model provides a motion bubble power generation facility based on graphite alkene which characterized in that: the graphene film comprises an insulating substrate (1), a graphene film layer (2) and a positive electrode and a negative electrode (3); the graphene film layer (2) is covered on one surface of the insulating substrate (1), and the positive electrode and the negative electrode (3) are respectively connected to two opposite ends of the graphene film layer (2); the integrated structure formed by the insulating substrate (1) and the graphene film layer (2) is placed in the ionic solution, and an acute included angle is formed between the integrated structure formed by the insulating substrate (1) and the graphene film layer (2) and the horizontal plane; the positive and negative electrodes (3) are respectively connected with the positive and negative electrodes of the load through leads; based on the movement of bubbles in an ionic solution on the surface of the graphene film layer (2), a gas-liquid-solid three-phase contact line is formed to move in a state that one side of an interface with the bubbles is graphene solid and the other side of the interface with the bubbles is liquid, so that ions around the bubbles form an electric double layer on the graphene film layer (2), and the front end and the tail end of the bubbles are charged and discharged, thereby realizing power supply for loads.
2. The graphene-based moving bubble power generation device of claim 1, wherein: the integrated structure formed by the insulating substrate (1) and the graphene film layer (2) is placed in the ionic solution, and an included angle of 30 degrees is formed between the integrated structure formed by the insulating substrate (1) and the graphene film layer (2) and the horizontal plane.
3. The graphene-based moving bubble power generation device of claim 1, wherein: the insulating substrate (1) is made of glass.
4. A method for manufacturing a moving bubble power generation device based on graphene according to any one of claims 1 to 3, comprising the following steps:
step A, aiming at the insulating substrate (1), sequentially cleaning and drying;
b, transferring the graphene film layer (2) on one surface of the insulating substrate (1);
c, respectively connecting the positive electrode and the negative electrode (3) at two opposite ends of the graphene film layer (2) and respectively connecting a lead aiming at the positive electrode and the negative electrode (3);
d, placing the integral structure formed by the insulating substrate (1) and the graphene film layer (2) in an ionic solution, wherein the integral structure formed by the insulating substrate (1) and the graphene film layer (2) and a horizontal plane form an acute included angle;
and E, connecting the other ends of the two leads respectively connected with the positive electrode and the negative electrode (3) with the positive electrode and the negative electrode of the load, forming an electric double layer on the graphene film layer (2) by ions around the bubbles based on the movement of the bubbles in the ionic solution on the surface of the graphene film layer (2), and charging and discharging at the front end and the tail end of the bubbles to realize power supply for the load.
5. The manufacturing method for the moving bubble power generation device based on graphene as claimed in claim 4, wherein in the step A, the insulating substrate (1) is cleaned by ethanol and ultrapure water and dried.
6. The manufacturing method for the moving bubble power generation device based on graphene as claimed in claim 4, wherein the step B comprises the following steps:
b1, manufacturing a graphene film with 1 or more layers on a copper foil, and entering step B2;
b2, hanging and coating a 4 omega t% polymethyl methacrylate solution on the surface of the copper foil covered with the graphene film, and entering the step B3 after the polymethyl methacrylate solution is volatilized;
step B3, placing the copper foil covered with the graphene film in an etching solution for soaking until the copper foil is completely dissolved to obtain a graphene-polymethyl methacrylate layer floating on the etching solution, and entering step B4;
step B4., cleaning the graphene-polymethyl methacrylate layer, transferring the graphene-polymethyl methacrylate layer to one surface of the insulating substrate (1), and performing step B5;
step B5. uses acetone to dissolve and remove the polymethyl methacrylate in the graphene-polymethyl methacrylate layer on the insulating substrate (1).
7. The manufacturing method for the moving bubble power generation device based on graphene as claimed in claim 6, wherein in the step B3, the copper foil covered with the graphene film is placed at a mass ratio of CuSO4:HCl:H2Soaking in an etching solution with the ratio of O to O being 1:5: 5.
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