CN112600461B - Piezoelectric energy collector - Google Patents
Piezoelectric energy collector Download PDFInfo
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- CN112600461B CN112600461B CN202011414038.5A CN202011414038A CN112600461B CN 112600461 B CN112600461 B CN 112600461B CN 202011414038 A CN202011414038 A CN 202011414038A CN 112600461 B CN112600461 B CN 112600461B
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 68
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 68
- 229920001746 electroactive polymer Polymers 0.000 claims abstract description 14
- -1 polytetrafluoroethylene-hexafluoropropylene Polymers 0.000 claims description 16
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 13
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 claims description 3
- 229920002799 BoPET Polymers 0.000 claims description 3
- 239000002033 PVDF binder Substances 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 claims description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 229920001897 terpolymer Polymers 0.000 claims description 3
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 3
- 229910021642 ultra pure water Inorganic materials 0.000 claims description 3
- 239000012498 ultrapure water Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 5
- 239000011148 porous material Substances 0.000 abstract description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- 229910052709 silver Inorganic materials 0.000 description 8
- 239000004332 silver Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003306 harvesting Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/06—Coating with compositions not containing macromolecular substances
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/22—Methods relating to manufacturing, e.g. assembling, calibration
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention relates to a piezoelectric energy collector, which comprises graphene films and flexible electroactive polymer films which are alternately stacked at intervals, wherein wires are respectively led out from the uppermost layer of the graphene films and the lowermost layer of the graphene films to obtain the piezoelectric energy collector, rectangular through holes and circular arc-shaped through holes are formed in the graphene films, and the length-to-width ratio of the rectangular through holes is 4-6:1-2, wherein the rectangular through holes comprise vertical through holes and horizontal through holes, the vertical through holes comprise a plurality of columns, the left side and the right side of each column of vertical through holes are respectively provided with a horizontal through hole, circular arc through holes are respectively arranged above and below two adjacent horizontal through holes, and the circle centers of the circular arc through holes positioned on the upper side and the lower side of the same horizontal through hole are overlapped. The piezoelectric energy collector is prepared from the graphene film and the piezoelectric material, and the graphene film in the piezoelectric energy collector has the characteristics of flexibility and good conductivity, and has good electric output performance by designing a unique open pore arrangement form.
Description
Technical Field
The invention relates to the field of energy collection, in particular to a piezoelectric energy collector.
Background
Energy problems are the hot topics of greatest concern in the world today. Researchers in various countries are continually striving to find and develop new energy sources. In recent years, with the rapid development of wireless sensor networks, wireless sensor networks have been widely used. In particular, the sensing node has the advantages of reduced size, light weight and greatly reduced power consumption, so that the sensing node is widely applied to various fields, such as industrial, agricultural, communication, national defense, aerospace and medical fields. The sensing nodes with low power consumption, small size and low cost can form a distributed and self-organizing wireless sensing network in a wireless communication mode. Most wireless sensing networks supply energy through batteries, but the wireless sensing volume is small, the self-carried battery energy is limited, and the long-term power supply requirement cannot be met. Some sensors are installed in the wild or used in wild animal tracking and positioning devices, which are particularly troublesome to replace when the battery is exhausted, and also increase certain cost problems, especially for those places in the wild of the mountain, and the battery is more difficult to replace and has environmental pollution problems when the battery is exhausted. According to a plurality of problems, researchers seek new energy sources to provide inexhaustible energy for nodes of a sensing network, so that the self-powered technology is widely applied. Self-powered, i.e., energy harvesting, is the conversion of other forms of energy in the environment into electrical energy to power electronic devices, and although the energy in the environment is very weak, the energy consumed by the micro-power-consuming product is reduced to the microwatts to milliwatts level, which makes it possible to harvest the energy in the environment to power the electronic devices. In the environment, a lot of energy such as solar energy, vibration energy, heat energy and human energy exists, but the solar energy and the heat energy are influenced by environmental climate and cannot be guaranteed to exist all the day, so that the vibration energy is greatly developed, and the vibration is everywhere because the vibration is not limited by places. At present, electromagnetic, electrostatic and piezoelectric are three main vibration energy collection methods, and compared with electromagnetic and electrostatic energy collection devices based on piezoelectric effect, the energy collection device has a simple structure and can be realized by micro-electromechanical technology, so that a miniaturized power generation device is obtained. The piezoelectric device uses piezoelectric materials as core elements, converts vibration energy in the outside into electric energy through piezoelectric effect, and utilizes the electric energy. The piezoelectric material has the power generation material with high energy density, no pollution, simple structure, high conversion efficiency, high electromechanical coupling coefficient, low cost and no electromagnetic interference.
Disclosure of Invention
The invention aims to provide a piezoelectric energy collector with excellent performance.
The technical scheme for solving the technical problems is as follows:
the piezoelectric energy collector comprises graphene films and flexible electroactive polymer films which are alternately stacked at intervals, wherein wires are led out from the uppermost layer of graphene film and the lowermost layer of graphene film respectively to obtain the piezoelectric energy collector, rectangular through holes and circular arc-shaped through holes are formed in the graphene films, and the length-width ratio of the rectangular through holes is 4-6:1-2, the rectangle through-hole includes vertical through-hole and horizontal through-hole, vertical through-hole includes that the vertical through-hole of every row is listed as, and the vertical through-hole left and right sides all is provided with horizontal through-hole, horizontal through-hole is provided with the multirow, and every row horizontal through-hole all includes the multiunit, and every group horizontal through-hole all is located vertical through-hole both sides, and the top and the below of two adjacent horizontal through-holes all are provided with convex through-hole, and the centre of a circle of the convex through-hole that is located the upper and lower both sides of same horizontal through-hole coincides.
Further, the preparation method of the graphene film comprises the following steps:
step 1: dispersing graphene oxide with ultrapure water, uniformly coating the dispersed graphene oxide on a PET film, and drying to form a graphene oxide film;
step 2: treating the graphene oxide film obtained in the step under the protection of argon at 600-1000 ℃ for hours, and then placing the graphene oxide film to 2000-3000 ℃ for reduction treatment at high temperature to obtain the treated graphene oxide film;
step 3: and (3) carrying out delay pressing on the treated graphene oxide film obtained in the last step to obtain a film with the thickness of 30-80 mu m, so as to obtain the high-conductivity graphene oxide film.
Further, the thickness of the flexible electroactive polymer film 2 is 50-100 μm.
Further, the number of layers of the graphene film 1 is not less than three, and the number of layers of the flexible electroactive polymer film is not less than two.
Further, the flexible electroactive polymer film is any one or more composite materials of polyvinylidene fluoride, polytetrafluoroethylene-perfluoropropyl vinyl ether, polytetrafluoroethylene-hexafluoropropylene and polytetrafluoroethylene-based vinylidene fluoride, tetrafluoroethylene and hexafluoropropylene terpolymers.
The beneficial effects of the invention are as follows: the piezoelectric energy collector is prepared from the graphene film and the piezoelectric material, and the graphene film in the piezoelectric energy collector has the characteristics of flexibility and good conductivity, and can remarkably improve the electric output performance of the piezoelectric energy collector by designing a unique open pore arrangement form.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a schematic structural diagram of a graphene film according to the present invention.
The list of craftsman represented by each reference in the figures is as follows:
1. a graphene film; 2. a flexible electroactive polymer film; 11. a vertical through hole; 12. a horizontal through hole; 13. circular arc through hole
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
As shown in fig. 1-2, the piezoelectric energy collector comprises graphene films 1 and flexible electroactive polymer films 2 which are alternately stacked at intervals, wherein wires are respectively led out from the uppermost layer and the lowermost layer of graphene films, and the piezoelectric energy collector is obtained, rectangular through holes and circular arc-shaped through holes 13 are formed in the graphene films 1, and the length-width ratio of the rectangular through holes is 4-6:1-2, the rectangle through-hole includes vertical through-hole 11 and horizontal through-hole 12, vertical through-hole 11 includes that the multirow is listed as, and the vertical through-hole 11 left and right sides of every row all is provided with horizontal through-hole 12, horizontal through-hole 12 is provided with the multirow, and every row horizontal through-hole 12 all includes the multiunit, and every group horizontal through-hole 12 all is located vertical through-hole 11 both sides, and the top and the below of two adjacent horizontal through-holes 12 all are provided with convex through-hole 13, and the centre of a circle of convex through-hole 13 that is located the upper and lower both sides of same horizontal through-hole 12 coincides.
As one embodiment, the preparation method of the graphene film 1 includes the following steps:
step 1: dispersing graphene oxide with ultrapure water, uniformly coating the dispersed graphene oxide on a PET film, and drying to form a graphene oxide film 1;
step 2: treating the graphene oxide film 1 obtained in the step 1 at 600-1000 ℃ for 1 hour under the protection of argon, and then reducing the graphene oxide film 1 to 2000-3000 ℃ to obtain a treated graphene oxide film 1;
step 3: and (3) carrying out delay pressing on the treated graphene oxide film 1 obtained in the last step to obtain a film with the thickness of 30-80 mu m, so as to obtain the high-conductivity graphene oxide film 1.
As an embodiment, the flexible electroactive polymer film 2 has a thickness of 50-100 μm.
As an embodiment, the number of layers of the graphene film 1 is not less than three, and the number of layers of the flexible electroactive polymer film 2 is not less than two.
As one embodiment, the flexible electroactive polymer film is a composite of any one or more of polyvinylidene fluoride, polytetrafluoroethylene-perfluoropropyl vinyl ether, polytetrafluoroethylene-hexafluoropropylene, and polytetrafluoroethylene-based terpolymers of vinylidene fluoride, tetrafluoroethylene, and hexafluoropropylene.
Embodiment 1, piezoelectric energy harvester based on macroscopic graphene film negative poisson ratio structure, the piezoelectric energy harvester can be manufactured by the following method:
step 1: preparing two polytetrafluoroethylene films subjected to full polarization treatment, wherein the thickness of each of three graphene films is 8 mu m, and the sizes of the three graphene films are 30mm multiplied by 50mm; punching on each graphene film according to the shape of fig. 2;
step 2: uniformly coating a thin layer of conductive silver adhesive on the upper surface of a graphene film, placing a polytetrafluoroethylene film on the graphene film, uniformly coating a thin layer of conductive silver adhesive on the upper surface of the polytetrafluoroethylene film, placing a second graphene film on the polytetrafluoroethylene film, then coating a layer of conductive silver adhesive on the upper surface of the graphene film, further coating a layer of conductive silver adhesive on the upper surface of the second graphene film, placing a second polytetrafluoroethylene film, uniformly coating a thin layer of conductive silver adhesive on the upper surface of the second polytetrafluoroethylene film, placing a third graphene film on the polytetrafluoroethylene film, and standing at room temperature to solidify the conductive silver adhesive;
step 3: and leading out wires from the uppermost layer and the lowermost layer of graphene films to obtain the piezoelectric energy collector.
Embodiment 2, a piezoelectric energy harvester based on a macroscopic graphene film negative poisson ratio structure, wherein the piezoelectric energy harvester can be manufactured by the following method:
step 1: preparing two polytetrafluoroethylene films subjected to full polarization treatment, wherein the thickness of each of three graphene films is 8 mu m, and the sizes of the three graphene films are 30mm multiplied by 50mm; compared with the punching mode in the embodiment 1, only arc-shaped holes are omitted, and punching is carried out on each graphene film;
step 2: two polytetrafluoroethylene films and three graphene films are stacked in a staggered mode, conductive silver adhesive is coated between the adjacent polytetrafluoroethylene films and the graphene films, and the conductive silver adhesive is solidified by standing at room temperature;
step 3: and leading out wires from the uppermost layer and the lowermost layer of graphene films to obtain the piezoelectric energy collector.
As shown in the following tables 1 to 3, the test results of the open-circuit voltage effective values, the short-circuit current effective values and the load characteristics of the output power of the piezoelectric ceramic energy collectors according to the embodiments 1, 2 and the conventional piezoelectric ceramic energy collectors according to the present invention are shown, and it can be seen that the piezoelectric energy collector according to the present invention has a larger short-circuit current, open-circuit voltage and output power than the conventional piezoelectric energy collector, and particularly, after the arc-shaped through holes are formed, the output power, open-circuit voltage and short-circuit current are all significantly improved.
Table 1 relationship between piezoelectric energy harvester current effective value and external load
Table 2 relationship between piezoelectric energy harvester output power and external load
Table 3 relationship between effective voltage value and external load for piezoelectric energy harvester
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (4)
1. Piezoelectric energy collector, its characterized in that, including alternately stacked graphene film (1) and flexible electroactive polymer film (2), draw forth the wire respectively from the upper strata and the lower floor's graphene film, rectangular through-hole and convex through-hole (13) have been seted up on graphene film (1), rectangular through-hole's aspect ratio is 4-6:1-2, wherein the rectangular through holes comprise vertical through holes (11) and horizontal through holes (12), the vertical through holes (11) comprise a plurality of columns, the left side and the right side of each column of vertical through holes (11) are provided with horizontal through holes (12), the horizontal through holes (12) are provided with a plurality of rows, each row of horizontal through holes (12) comprises a plurality of groups, each group of horizontal through holes (12) are positioned at two sides of the vertical through holes (11), circular arc through holes (13) are arranged above and below two adjacent horizontal through holes (12), and the circle centers of the circular arc through holes (13) positioned at the upper side and the lower side of the same horizontal through hole (12) coincide;
the number of layers of the graphene film (1) is not less than three, and the number of layers of the flexible electroactive polymer film (2) is not less than two.
2. The piezoelectric energy harvester according to claim 1, characterized in that the preparation method of the graphene film (1) comprises the steps of:
step 1: dispersing graphene oxide with ultrapure water, uniformly coating the dispersed graphene oxide on a PET film, and drying to form a graphene oxide film (1);
step 2: treating the graphene oxide film (1) obtained in the step 1 at 600-1000 ℃ for 1 hour under the protection of argon, and then reducing the graphene oxide film (1) to 2000-3000 ℃ to obtain a treated graphene oxide film (1);
step 3: and (3) carrying out delay pressing on the treated graphene oxide film (1) obtained in the last step to obtain a film with the thickness of 30-80 mu m, so as to obtain the high-conductivity graphene oxide film (1).
3. Piezoelectric energy harvester according to claim 1, characterized in that the flexible electroactive polymer film (2) has a thickness of 50-100 μm.
4. The piezoelectric energy harvester of claim 1 wherein the flexible electroactive polymer film is any one or more of polyvinylidene fluoride, polytetrafluoroethylene-perfluoropropyl vinyl ether, polytetrafluoroethylene-hexafluoropropylene, and polytetrafluoroethylene-based terpolymers of vinylidene fluoride, tetrafluoroethylene, and hexafluoropropylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011414038.5A CN112600461B (en) | 2020-12-04 | 2020-12-04 | Piezoelectric energy collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011414038.5A CN112600461B (en) | 2020-12-04 | 2020-12-04 | Piezoelectric energy collector |
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| Publication Number | Publication Date |
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| CN112600461A CN112600461A (en) | 2021-04-02 |
| CN112600461B true CN112600461B (en) | 2023-08-11 |
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