CN113136042B - Triboelectric energy conversion device based on CTAB modified polystyrene composite P (VDF-TrFE) - Google Patents
Triboelectric energy conversion device based on CTAB modified polystyrene composite P (VDF-TrFE) Download PDFInfo
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- H—ELECTRICITY
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08J2327/16—Homopolymers or copolymers of vinylidene fluoride
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- C08J2425/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2425/02—Homopolymers or copolymers of hydrocarbons
- C08J2425/04—Homopolymers or copolymers of styrene
- C08J2425/06—Polystyrene
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- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/17—Amines; Quaternary ammonium compounds
- C08K5/19—Quaternary ammonium compounds
Abstract
The invention relates to an energy conversion material and device technology, and aims to provide a triboelectric energy conversion device based on CTAB modified polystyrene composite P (VDF-TrFE). The cathode material and the anode material are arranged in parallel and keep a distance, and double-sided conductive nickel glue used as electrodes is respectively adhered to the outer side surfaces of the cathode material and the anode material; two copper wires are respectively connected with the two electrodes, and the tail ends of the copper wires are used for connecting loads to form a closed circuit; the polyimide film layer completely wraps the two electrodes and the anode and cathode materials to form a hollow structure with an oval section; the positive electrode material is a friction positive electrode composite film which is obtained by taking PS nano particles modified by CTAB as a filler and preparing a film through drop coating; the negative electrode material was a commercial PTFE membrane. The invention comprehensively considers the surface micro-rough structure and the adjustment and control of the dielectric property and improves the surface potential, coordinates and optimizes the output performance of the energy conversion device and can realize the adjustment and control of the output performance of the device; the preparation process is simple, and the method has high operability and repeatability.
Description
Technical Field
The invention belongs to energy conversion material and device technology, and particularly relates to a flexible triboelectric energy conversion device of modified organic nanoparticle composite P (VDF-TrFE) and a preparation method thereof.
Background
With the rapid rise of new technologies such as internet of things, big data, wearable equipment and the like, core electronic devices such as sensors and the like are developing towards the directions of miniaturization, intellectualization, multifunction, integration and the like, and the energy requirements of the traditional battery technology are difficult to meet due to the problems of limited cycle life, large volume, environmental pollution, health hazard and the like. Therefore, technologies for obtaining sustainable energy from the environment have attracted a great deal of attention. The triboelectrification effect is utilized to collect micro mechanical energy in the surrounding environment and convert the micro mechanical energy into electric energy, so that continuous energy supply of electronic devices and equipment is realized.
The friction nano-generator is a contact electrification and electrostatic induction coupling based electrification device. The main determining the electrification performance of the friction nano-generator is the surface charge density of the friction material. A typical contact separation type friction nano generator is equivalent to a plate capacitor model, and the electric output of the generator is improved, namely the capacitance value of a material is improved. Therefore, increasing the specific surface area of the friction material and increasing the dielectric constant of the insulating material are the main ways to improve the performance. In addition, in order to further enlarge the contact potential difference of the positive and negative friction materials and further improve the transfer charge amount in the contact-separation process, the surface potential of the materials can be improved.
Polyvinylidene fluoride trifluoroethylene (PVDF-TrFE) based composite membranes are considered to have potential advantages in energy conversion due to the characteristics of good flexibility, high electrical response and the like. However, the dielectric property of the composite material is optimized by doping the inorganic high-dielectric filler into the polymer matrix, and the poor compatibility of an organic-inorganic interface exists, so that the flexibility of the energy conversion device is greatly reduced, and the application of the energy conversion device in wearable equipment is limited. In addition, the solution of increasing the contact area of the friction material by microstructure design also has the disadvantages of complex preparation process, high cost and the like.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the prior art and provides a triboelectric energy conversion device based on CTAB modified polystyrene composite P (VDF-TrFE).
In order to solve the technical problem, the solution of the invention is as follows:
the preparation method of the friction anode composite film for the triboelectric energy conversion device comprises the following steps:
(1) preparation of CTAB-modified PS nanoparticles
Taking 3 g of PS nano particles, and fully grinding; then blending with 0.75 g of hexadecyl trimethyl ammonium bromide (CTAB) in 300 ml of water-alcohol mixed solution; after ultrasonic treatment for 0.5 hour, stirring for 24 hours at room temperature to obtain modified PS nano-particles;
(2) dissolving 0.5 g of polyvinylidene fluoride trifluoroethylene P (VDF-TrFE) in 5 ml of N, N-Dimethylformamide (DMF) to obtain a P (VDF-TrFE) solution; adding the modified PS nano-particles into a P (VDF-TrFE) solution, and stirring for 8 hours at room temperature after ultrasonic dispersion to obtain a uniform mixed solution;
(3) dripping the mixed solution obtained in the step (2) to prepare a film, placing the film in a vacuum oven for drying and forming, and controlling the thickness of the film to be 60-70 mu m to obtain a friction anode composite film; and (3) controlling the adding amount of the modified PS nano particles in the step (2) to enable the mass ratio of the modified PS nano particles in the final composite film product to be 5-20%.
In the invention, the volume ratio of the deionized water to the ethanol in the water-alcohol mixed solution is 1: 9.
In the invention, the mass percentage of the modified PS nano-particles in the composite film is 10%.
The invention further provides a method for further preparing a triboelectric energy conversion device by using the triboelectric positive electrode composite film prepared by the method, which comprises the following steps:
(1) taking a friction positive electrode composite film as a positive electrode material, taking a commercial PTFE film as a negative electrode material, and respectively attaching double-sided conductive nickel adhesive to the outer side surfaces of the positive electrode material and the negative electrode material to be used as electrodes;
(2) two copper wires are respectively connected with the two electrodes, and the tail ends of the copper wires are used for connecting loads to form a closed circuit;
(3) the polyimide film is used for completely wrapping the two electrodes and the anode and cathode materials, and the anode material and the cathode material keep a distance to form a hollow structure with an oval section, so that the anode material and the cathode material can be subjected to contact-separation operation.
The invention also provides a triboelectric energy conversion device based on CTAB modified polystyrene composite P (VDF-TrFE), which comprises a positive electrode material and a negative electrode material which are arranged in parallel and keep a distance, wherein double-sided conductive nickel adhesive used as electrodes is respectively adhered to the outer side surfaces of the positive electrode material and the negative electrode material; two copper wires are respectively connected with the two electrodes, and the tail ends of the copper wires are used for connecting loads to form a closed circuit; the polyimide film layer completely wraps the two electrodes and the anode and cathode materials to form a hollow structure with an oval section;
the positive electrode material is the friction positive electrode composite film prepared by the method; the negative electrode material is a commercial PTFE membrane.
In the present invention, the area of the electrode is 2X 2cm2。
In the invention, the distance between the anode material and the cathode material is not more than 4mm at most.
Description of the inventive principles:
the PS nano-particles with the average particle size of 300nm and concentrated size distribution are obtained by an emulsion polymerization mode, and the synthesized PS nano-particles are modified by a cationic active agent; then, the composite film with good compatibility of the filler and the matrix and uniform dispersion is prepared by a solution blending and drop coating film forming process.
The cationic modified nano-particles can enhance the dispersibility of the particles in a matrix due to electrostatic repulsion, and the problem of poor compatibility of inorganic-organic composite materials can be solved by doping organic polystyrene nano-particles; meanwhile, the nano particles with uniform appearance can construct a micro-convex structure similar to the lotus leaf surface on the surface of the composite film, which is beneficial to increasing the contact area of the friction material. The multiple interfaces of the filler and the matrix can effectively utilize the interface polarization effect to modulate the dielectric constant of the composite film. Finally, the surface potential of the friction anode material can be improved by the action of the cation modifier, and the contact potential difference between the friction anode material and the cathode material is further enlarged, so that the transfer charge quantity is effectively increased, and the output performance is optimized.
Compared with the prior art, the invention has the following main characteristics:
(1) the triboelectric energy conversion device has excellent triboelectric performance, can convert low-frequency mechanical energy into electric energy, and supplies energy to wearable electronic equipment.
(2) The preparation method is simple in preparation process, and the operability and repeatability of the method are high.
(3) The invention can realize the regulation and control of the output performance of the device by adjusting the content of the modified PS nano particles;
(4) the invention comprehensively considers from multiple angles, and the output performance of the energy conversion device is adjusted and optimized by regulating and improving the surface micro-rough structure and the dielectric property.
Drawings
FIG. 1 is a schematic structural view of a triboelectric energy conversion device according to the present invention;
wherein the reference numbers: 1 is double-sided conductive nickel adhesive used as an electrode, 2 is a friction anode composite film prepared by the invention, 3 is a commercial PTFE film, 4 is modified PS nano-particles, and 5 is a polyimide film.
Fig. 2 is a TEM image of modified PS nanoparticles prepared according to the present invention.
FIG. 3 is an SEM image of a composite film prepared according to the present invention.
FIG. 4 is a diagram of short-circuit current versus time for a triboelectric energy conversion device prepared in accordance with the present invention.
Fig. 5 is a graph of short-circuit current versus time for a triboelectric energy conversion device prepared in a comparative example.
FIG. 6 is a graph comparing the dielectric properties of the thin film prepared in the comparative example with those of the composite films of examples 1 to 3.
FIG. 7 is a graph comparing the surface potentials of a thin film prepared in comparative example and a composite film prepared in the present invention.
Detailed Description
The features and advantages of the invention will be set forth in the detailed description which follows, and in part will be obvious from the description. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration and explanation only, not limitation.
Unless otherwise specified, the raw materials, reagents, equipment and the like used in the present invention may be commercially available or prepared by an existing method.
Example 1
In the embodiment, PS nanoparticles modified by CTAB are used as a filler (marked as C-PS), P (VDF-TrFE) is used as a base material, and the method used by the invention is adopted to prepare the high-performance triboelectric energy conversion device.
The specific operation steps are as follows:
(1)4.5 g of polyvinylpyrrolidone and 300 ml of deionized water were mixed and mechanically stirred for half an hour to be sufficiently dissolved. The entire reaction apparatus was placed under a nitrogen atmosphere, 30 g of styrene were added, the apparatus was warmed to 70 ℃ and 0.75 g of initiator azobisisobutyramidine hydrochloride AIBA was added rapidly. Keeping the temperature at 70 ℃ and stirring for reaction for 24 hours, and carrying out polymerization reaction to obtain PS nano-particles with the average particle size of 300 nanometers. And (3) fully grinding the PS nano-particles obtained by the reaction, mixing the ground PS nano-particles with 0.75 g of hexadecyl trimethyl ammonium bromide in 300 ml of a water-alcohol mixed solution (the volume ratio of deionized water to ethanol is 1/9), carrying out ultrasonic treatment for half an hour, and stirring at room temperature for 24 hours to obtain the modified PS nano-particles.
(2) Dissolving 0.5 g of polyvinylidene fluoride trifluoroethylene P (VDF-TrFE) in 5 ml of N, N-Dimethylformamide (DMF) to obtain a P (VDF-TrFE) solution; 0.025 g of modified PS nanoparticles was added to the P (VDF-TrFE) solution, and after ultrasonic dispersion, the mixture was stirred at room temperature for 8 hours to obtain a homogeneous mixture. Dripping the mixed solution to prepare a film, controlling the thickness of the film to be 60-70 mu m, and placing the film in a vacuum oven for drying and forming to obtain a friction anode composite film, wherein the mass ratio of C-PS in the composite film is 5%;
(3) the prepared composite membrane is used as a positive electrode material, a commercial PTFE membrane is used as a negative electrode, one surface of each of the two films is respectively pasted with double-sided conductive nickel adhesive to be used as an electrode, and the area of the electrode is controlled to be 2 multiplied by 2cm2And connecting the two electrodes by copper wires to form a closed circuit. Fixing a polyimide film on the other surface of the conductive nickel adhesive, and forming a hollow structure with an oval section, so that the conductive nickel adhesive can be subjected to contact-separation operation. And controlling the obtained triboelectric energy conversion device to perform output performance test under a fatigue test working system, wherein the contact-separation working parameters are 50N and 5Hz, and the maximum separation distance of the two composite membranes is 4 mm.
The short circuit current output of the flexible triboelectric energy conversion device described in this example is about 10.57 μ a when operating.
Example 2
In the embodiment, PS nanoparticles modified by CTAB are used as a filler (marked as C-PS), P (VDF-TrFE) is used as a base material, and the method used by the invention is adopted to prepare the high-performance triboelectric energy conversion device.
The specific operation steps are as follows:
(1)4.5 g polyvinylpyrrolidone and 300 ml deionized water were mixed and mechanically stirred for half an hour to dissolve them thoroughly. The entire reaction apparatus was placed under a nitrogen atmosphere, 30 g of styrene were added, the apparatus was warmed to 70 ℃ and 0.75 g of initiator azobisisobutyramidine hydrochloride AIBA was added rapidly. Keeping the temperature at 70 ℃ and stirring for reaction for 24 hours, and carrying out polymerization reaction to obtain PS nano-particles with the average particle size of 300 nanometers. And (3) fully grinding the PS nano-particles obtained by the reaction, mixing the ground PS nano-particles with 0.75 g of hexadecyl trimethyl ammonium bromide in 300 ml of a water-alcohol mixed solution (the volume ratio of deionized water to ethanol is 1/9), carrying out ultrasonic treatment for half an hour, and stirring at room temperature for 24 hours to obtain the modified PS nano-particles.
(2) Dissolving 0.5 g of polyvinylidene fluoride trifluoroethylene P (VDF-TrFE) in 5 ml of N, N-Dimethylformamide (DMF) to obtain a P (VDF-TrFE) solution; 0.05 g of modified PS nano-particles is added into the P (VDF-TrFE) solution, and after ultrasonic dispersion, the mixture is stirred for 8 hours at room temperature to obtain a uniform mixed solution. Dripping the mixed solution to prepare a film, controlling the thickness of the film to be 60-70 mu m, and placing the film in a vacuum oven for drying and forming to obtain a friction anode composite film, wherein the mass ratio of C-PS in the composite film is 10%;
(3) the prepared composite membrane is used as a positive electrode material, a commercial PTFE membrane is used as a negative electrode, one surface of each of the two films is respectively pasted with double-sided conductive nickel adhesive to be used as an electrode, and the area of the electrode is controlled to be 2 multiplied by 2cm2And connecting the two electrodes by copper wires to form a closed circuit. Fixing a polyimide film on the other surface of the conductive nickel adhesive, and forming a hollow structure with an oval section, so that the conductive nickel adhesive can be subjected to contact-separation operation. Controlling the obtained triboelectric energy conversion device to perform output performance test under a fatigue test working system, wherein the contact-separation working parameters are 50N and 5Hz, and the two composite membranes are most separatedThe large distance is 4 mm.
The short-circuit current output of the flexible triboelectric energy conversion device according to this example is shown in fig. 4 as a function of time. The maximum current value was 19.57. mu.A.
Example 3
In the embodiment, PS nanoparticles modified by CTAB are used as a filler (marked as C-PS), P (VDF-TrFE) is used as a base material, and the method used by the invention is adopted to prepare the high-performance triboelectric energy conversion device.
The specific operation steps are as follows:
(1)4.5 g polyvinylpyrrolidone and 300 ml deionized water were mixed and mechanically stirred for half an hour to dissolve them thoroughly. The entire reaction apparatus was placed under a nitrogen atmosphere, 30 g of styrene were added, the apparatus was warmed to 70 ℃ and 0.75 g of initiator azobisisobutyramidine hydrochloride AIBA was added rapidly. Keeping the temperature at 70 ℃ and stirring for reaction for 24 hours, and carrying out polymerization reaction to obtain PS nano-particles with the average particle size of 300 nanometers. And (3) fully grinding the PS nano-particles obtained by the reaction, mixing the ground PS nano-particles with 0.75 g of hexadecyl trimethyl ammonium bromide in 300 ml of a water-alcohol mixed solution (the volume ratio of deionized water to ethanol is 1/9), carrying out ultrasonic treatment for half an hour, and stirring at room temperature for 24 hours to obtain the modified PS nano-particles.
(2) Dissolving 0.5 g of polyvinylidene fluoride trifluoroethylene P (VDF-TrFE) in 5 ml of N, N-Dimethylformamide (DMF) to obtain a P (VDF-TrFE) solution; 0.1 g of modified PS nanoparticles is added into the P (VDF-TrFE) solution, and after ultrasonic dispersion, the mixture is stirred for 8 hours at room temperature to obtain a uniform mixed solution. Dripping the mixed solution to prepare a film, controlling the thickness of the film to be 60-70 mu m, and placing the film in a vacuum oven for drying and forming to obtain a friction anode composite film, wherein the mass ratio of C-PS in the composite film is 20%;
(3) the prepared composite membrane is used as a positive electrode material, a commercial PTFE membrane is used as a negative electrode, one surface of each of the two films is respectively pasted with double-sided conductive nickel adhesive to be used as an electrode, and the area of the electrode is controlled to be 2 multiplied by 2cm2And connecting the two electrodes by copper wires to form a closed circuit. Fixing polyimide film on the other surface of the conductive nickel adhesive to form a hollow structure with elliptical cross sectionA contact-separation operation is performed. And controlling the obtained triboelectric energy conversion device to perform output performance test under a fatigue test working system, wherein the contact-separation working parameters are 50N and 5Hz, and the maximum separation distance of the two composite membranes is 4 mm.
The short circuit current output of the flexible triboelectric energy conversion device described in this example is about 12.08 mua when operating.
Comparative example
This example illustrates the preparation of a triboelectric energy conversion device from a commercially available P (VDF-TrFE) material by the method of the present invention.
The specific operation steps are as follows:
(1) dissolving 0.5 g of polyvinylidene fluoride trifluoroethylene P (VDF-TrFE) in 5 ml of N, N-Dimethylformamide (DMF) to obtain a P (VDF-TrFE) solution; the modified PS nanoparticles are not added into the P (VDF-TrFE) solution, and the mixture is stirred for 8 hours at room temperature to obtain a uniform mixed solution. Dripping the mixed solution to prepare a film, controlling the thickness of the film to be 60-70 mu m, and placing the film in a vacuum oven for drying and forming to obtain a friction anode film (the composite film does not use the modified filler C-PS of the invention);
(3) the prepared film is used as a positive electrode material, a commercial PTFE film is used as a negative electrode, one surface of each of the two films is respectively pasted with double-sided conductive nickel adhesive to be used as an electrode, and the area of the electrode is controlled to be 2 multiplied by 2cm2And connecting the two electrodes by copper wires to form a closed circuit. Fixing a polyimide film on the other surface of the conductive nickel adhesive, and forming a hollow structure with an oval section, so that the conductive nickel adhesive can be subjected to contact-separation operation. And controlling the obtained triboelectric energy conversion device to perform output performance test under a fatigue test working system, wherein the contact-separation working parameters are 50N and 5Hz, and the maximum separation distance of the two composite membranes is 4 mm.
The short-circuit current output of the flexible triboelectric energy conversion device according to this example is shown in fig. 5 as a function of time. The maximum current value was 10.28. mu.A.
It can be seen from the data of each example and comparative example that the composite film doped with the C-PS nanoparticles can not only construct a lotus leaf-like convex structure on the surface of the composite film to increase the contact area between the friction materials, but also utilize the modification effect of CTAB to raise the surface potential of the positive friction material (fig. 7), enlarge the contact potential difference between the positive and negative friction materials, and promote the transfer of frictional charges. In addition, the matrix-filler interface effect may further enhance the dielectric constant of the composite film due to the difference in conductivity between the polymer matrix and the filler, resulting in the accumulation of carriers at the interface (as shown in fig. 6). In example two, when the mass doping concentration was 10%, the dielectric constant was increased from 15.51 to 18.89, and the output performance (maximum current value) of the assembled energy conversion device was increased from 10.28 μ a to 19.57 μ a of the comparative example, to obtain the most preferable example of the present invention. In the first embodiment, when the mass fraction of the doping is 5%, since the doping content is low, the influence is limited in terms of dielectric modulation, micro-roughness structure formation, and surface potential improvement, and thus the output performance is 10.57 μ a. In the third example, when the doping content is 20%, although the surface roughness and the surface potential are improved remarkably, the influence of the low dielectric constant (-3) of PS itself is dominant due to the large doping content, so that the dielectric constant of the composite film is reduced, and the output performance is 12.08 μ a. According to the invention, the composite film performance is regulated and controlled by adopting the nano particles subjected to cation modification as the filler, and the comprehensive effects of surface area improvement, dielectric property optimization and surface potential modulation optimization output performance of the friction material in comparison with the prior art can be embodied even if the embodiment is not the most preferred embodiment.
In addition, the triboelectric energy conversion device described in the examples is a preferred embodiment, but the present invention is not limited to the specific details of the above embodiment, and various combinations of changes and modifications of the technical solution of the present invention are within the protection scope of the present invention.
It should be noted that the specific features described in the above embodiments can be freely combined without contradiction, and in order to avoid redundancy, other possible combinations of the features of the present invention are not separately described.
Claims (8)
1. A preparation method of a friction anode composite film for a triboelectric energy conversion device is characterized by comprising the following steps:
(1) preparation of CTAB-modified PS nanoparticles
Mixing 4.5 g of polyvinylpyrrolidone with 300 ml of deionized water, and mechanically stirring for half an hour to fully dissolve the polyvinylpyrrolidone; placing the whole reaction system in a nitrogen atmosphere, adding 30 g of styrene, and heating to 70 ℃; then adding 0.75 g of initiator azobisisobutyramidine hydrochloride AIBA, keeping the temperature at 70 ℃, and stirring for reacting for 24 hours; after the polymerization reaction is finished, PS nano-particles with the average particle size of 300 nanometers are obtained;
taking 3 g of PS nano particles, and fully grinding; then mixing with 0.75 g of hexadecyl trimethyl ammonium bromide in 300 ml of water-alcohol mixed solution; after ultrasonic treatment for 0.5 hour, stirring for 24 hours at room temperature to obtain modified PS nano-particles;
(2) dissolving 0.5 g of polyvinylidene fluoride trifluoroethylene P (VDF-TrFE) in 5 ml of N, N-dimethylformamide to obtain a P (VDF-TrFE) solution; adding the modified PS nano-particles into a P (VDF-TrFE) solution, and stirring for 8 hours at room temperature after ultrasonic dispersion to obtain a uniform mixed solution;
(3) dripping the mixed solution obtained in the step (2) to prepare a film, placing the film in a vacuum oven for drying and forming, and controlling the thickness of the film to be 60-70 mu m to obtain a friction anode composite film; and (3) controlling the adding amount of the modified PS nano particles in the step (2) to enable the mass ratio of the modified PS nano particles in the final composite film product to be 5-20%.
2. The method according to claim 1, wherein the volume ratio of the deionized water to the ethanol in the hydroalcoholic mixed solution is 1: 9.
3. The method of claim 1, wherein the modified PS nanoparticles are present in the composite film at a level of 10% by weight.
4. The method for further preparing a triboelectric energy conversion device by using the triboelectric positive electrode composite film prepared by the method of claim 1, is characterized by comprising the following steps:
(1) taking a friction positive electrode composite film as a positive electrode material, taking a commercial PTFE film as a negative electrode material, and respectively attaching double-sided conductive nickel adhesive to the outer side surfaces of the positive electrode material and the negative electrode material to be used as electrodes;
(2) two copper wires are respectively connected with the two electrodes, and the tail ends of the copper wires are used for connecting loads to form a closed circuit;
(3) the polyimide film is used for completely wrapping the two electrodes and the anode and cathode materials, and the anode material and the cathode material keep a distance to form a hollow structure with an oval section, so that the anode material and the cathode material can be subjected to contact-separation operation.
5. The method of claim 4, wherein the positive electrode material is spaced from the negative electrode material by a distance of no more than 4mm at a maximum.
6. A triboelectric energy conversion device based on CTAB modified polystyrene composite P (VDF-TrFE) is characterized by comprising a positive electrode material and a negative electrode material which are arranged in parallel and keep a distance, wherein double-sided conductive nickel adhesive used as electrodes is respectively adhered to the outer side surfaces of the positive electrode material and the negative electrode material; two copper wires are respectively connected with the two electrodes, and the tail ends of the copper wires are used for connecting loads to form a closed circuit; the polyimide film layer completely wraps the two electrodes and the anode and cathode materials to form a hollow structure with an oval section;
the positive electrode material is the friction positive electrode composite film prepared by the method in claim 1; the negative electrode material is a commercial PTFE membrane.
7. The triboelectric energy conversion device according to claim 6, wherein said electrodes have an area of 2 x 2cm2。
8. The triboelectric energy conversion device according to claim 6, wherein said positive and negative electrode materials are spaced apart by a maximum of no more than 4 mm.
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