CN112600461A - Piezoelectric energy harvester - Google Patents
Piezoelectric energy harvester Download PDFInfo
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- CN112600461A CN112600461A CN202011414038.5A CN202011414038A CN112600461A CN 112600461 A CN112600461 A CN 112600461A CN 202011414038 A CN202011414038 A CN 202011414038A CN 112600461 A CN112600461 A CN 112600461A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 74
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 74
- 229920001746 electroactive polymer Polymers 0.000 claims abstract description 14
- -1 polyethylene terephthalate Polymers 0.000 claims description 21
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 15
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 15
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 6
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 claims description 3
- 239000002033 PVDF binder Substances 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
- 238000005096 rolling process 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
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 5
- 239000012528 membrane Substances 0.000 description 12
- 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
- 239000000919 ceramic Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 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
- 239000003814 drug Substances 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
- 238000010248 power generation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
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- 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
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 leads are respectively led out from the uppermost graphene film and the lowermost graphene film, so that the piezoelectric energy collector is obtained, the graphene films are provided with rectangular through holes and arc-shaped through holes, and the aspect ratio of the rectangular through holes is 4-6: 1-2, the rectangular through holes comprise vertical through holes and horizontal through holes, each vertical through hole comprises multiple rows of vertical through holes, horizontal through holes are formed in the left side and the right side of each row of vertical through holes, circular arc-shaped through holes are formed above and below two adjacent horizontal through holes, and the circle centers of the circular arc-shaped through holes on the upper side and the lower side of the same horizontal through hole are coincided. The piezoelectric energy collector is prepared from the graphene film and the piezoelectric material, the graphene film in the piezoelectric energy collector has the characteristics of flexibility and good conductivity, and the piezoelectric energy collector has good electrical output performance by designing a unique opening arrangement form.
Description
Technical Field
The invention relates to the field of energy collection, in particular to a piezoelectric energy collector.
Background
The energy problem is the most interesting hot topic in the world today. Researchers in various countries are all 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. Especially, the sensing nodes have the advantages of reduced size, light weight and greatly reduced power consumption, so the sensing nodes are widely applied to various fields, such as the fields of industry, agriculture, communication, national defense, aerospace and medicine. The sensing nodes with low power consumption, small size and low cost can form a distributed and self-organized wireless sensing network in a wireless communication mode. Most of wireless sensing networks supply energy through batteries, but the wireless sensing volume is small, the energy of the batteries carried by the wireless sensing networks is limited, and the requirement of long-term power supply cannot be met. If some sensors are installed in the field or used for tracking and positioning devices of wild animals, the battery replacement is particularly troublesome after the battery is used up, certain cost problems are increased, particularly for places in the field in mountains, the battery replacement is more difficult, and the problem of environmental pollution is caused when the battery is discarded after the battery is used up. According to a plurality of problems, researchers seek new energy sources to provide inexhaustible energy for the nodes of the sensing network, so that the self-powered technology is widely applied. The self-powered energy collection is to convert other forms of energy in the environment into electric energy to supply energy to the electronic equipment, and although the energy in the environment is very weak, the energy consumed by the micro-power consumption product is reduced to the level of microwatts to milliwatts, so that the energy in the environment can be collected to supply power to the electronic equipment. The environment has many energies, such as solar energy, vibration energy, heat energy and human physical ability, but the solar energy and the heat energy are influenced by the environmental climate and can not ensure the existence of the whole day, so the vibration energy is greatly developed, and the vibration is everywhere because of not being limited by places. At present, electromagnetic type, electrostatic type and piezoelectric type are three main vibration type energy collecting methods, and compared with the electromagnetic type and the electrostatic type, the energy collecting device based on the piezoelectric effect has a simple structure and can be realized by a micro electro mechanical technology, so that a miniaturized generating device is obtained. The piezoelectric device uses a piezoelectric material as a core element, converts vibration energy in the outside into electric energy through a piezoelectric effect, and utilizes the electric energy. The piezoelectric material is a 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 harvester with excellent performance aiming at the problems.
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, leads are respectively led out from the uppermost graphene film and the lowermost graphene film, and the piezoelectric energy collector is obtained, wherein the graphene films are provided with rectangular through holes and arc-shaped through holes, and the aspect ratio of the rectangular through holes is 4-6: 1-2, the rectangular through holes comprise vertical through holes and horizontal through holes, each vertical through hole comprises multiple rows of vertical through holes, horizontal through holes are arranged on the left side and the right side of each row of vertical through holes, the horizontal through holes are provided with multiple rows, each row of horizontal through holes comprises multiple groups, each group of horizontal through holes are located on the two sides of each vertical through hole, arc-shaped through holes are arranged above and below two adjacent horizontal through holes, and the circle centers of the arc-shaped through holes on the upper side and the lower side of the same horizontal through hole are coincided.
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 (polyethylene terephthalate) film, and drying to form a graphene oxide film;
step 2: treating the graphene oxide film obtained in the step at the temperature of 600-;
and step 3: and (3) rolling the processed graphene oxide film obtained in the last step into a film of 30-80 microns to obtain the high-conductivity graphene oxide film.
Further, the flexible electroactive polymer film 2 has a thickness of 50 to 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.
Furthermore, the flexible electroactive polymer film is a composite material of one or more of polyvinylidene fluoride, polytetrafluoroethylene-perfluoropropyl vinyl ether, polytetrafluoroethylene-hexafluoropropylene and a terpolymer of vinylidene fluoride, tetrafluoroethylene and hexafluoropropylene which take the polytetrafluoroethylene as a base.
The invention has the beneficial effects that: the piezoelectric energy collector is prepared from the graphene film and the piezoelectric material, the graphene film in the piezoelectric energy collector has the characteristics of flexibility and good conductivity, and the electrical output performance of the piezoelectric energy collector can be obviously improved by designing a unique opening arrangement form.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of a graphene film according to the present invention.
The Jumbo list of trademarks represented by the reference numbers in the drawings 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 this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1-2, the piezoelectric energy collector includes graphene films 1 and flexible electroactive polymer films 2 stacked at intervals in a staggered manner, and leads are respectively led out from the uppermost graphene film and the lowermost graphene film, so as to obtain the piezoelectric energy collector, wherein a rectangular through hole and an arc-shaped through hole 13 are formed in the graphene film 1, and the aspect ratio of the rectangular through hole is 4-6: 1-2, the rectangle through-hole includes vertical through-hole 11 and horizontal through-hole 12, vertical through-hole 11 includes the multiseriate, and every vertical through-hole 11 left and right sides of being listed as all is provided with horizontal through-hole 12, horizontal through-hole 12 is provided with the multirow, and every horizontal through-hole 12 of row all includes the multiunit, and every horizontal through-hole 12 of group 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, are located the coincidence of the centre of a circle of the convex through-hole 13 of same.
As an embodiment, the method for preparing the graphene film 1 includes the steps of:
step 1: dispersing graphene oxide with ultrapure water, uniformly coating the dispersed graphene oxide on a PET (polyethylene terephthalate) film, and drying to form a graphene oxide film 1;
step 2: treating the graphene oxide film 1 obtained in the step 1 at the temperature of 600-1000 ℃ for 1 hour under the protection of argon, and then reducing the graphene oxide film 1 at the temperature of 2000-3000 ℃ to obtain the treated graphene oxide film 1;
and step 3: and (3) rolling the processed graphene oxide film 1 obtained in the last step into a film of 30-80 μm to obtain the high-conductivity graphene oxide film 1.
As an embodiment, the flexible electroactive polymer film 2 has a thickness of 50 to 100 μm.
In one embodiment, the graphene film 1 has no less than three layers, and the flexible electroactive polymer film 2 has no less than two layers.
In one embodiment, the flexible electroactive polymer film is a composite of one or more of polyvinylidene fluoride, polytetrafluoroethylene-perfluoropropyl vinyl ether, polytetrafluoroethylene-hexafluoropropylene, and polytetrafluoroethylene-based terpolymers of vinylidene fluoride, tetrafluoroethylene, and hexafluoropropylene.
The embodiment 1 discloses a piezoelectric energy harvester based on a macroscopic graphene film negative poisson ratio structure, which can be manufactured by the following method:
step 1: preparing two polytetrafluoroethylene membranes and three graphene membranes which are subjected to full polarization treatment, wherein the thicknesses of the two polytetrafluoroethylene membranes and the three graphene membranes are 8 micrometers, and the thicknesses of the two graphene membranes and the three graphene membranes are 30mm multiplied by 50 mm; perforating 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, coating a layer of conductive silver adhesive on the upper surface of the graphene film, 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 cure the conductive silver adhesive;
and step 3: and leading out wires from the uppermost layer graphene film and the lowermost layer graphene film to obtain the piezoelectric energy collector.
step 1: preparing two polytetrafluoroethylene membranes and three graphene membranes which are subjected to full polarization treatment, wherein the thicknesses of the two polytetrafluoroethylene membranes and the three graphene membranes are 8 micrometers, and the thicknesses of the two graphene membranes and the three graphene membranes are 30mm multiplied by 50 mm; compared with the punching mode in the embodiment 1, only the arc-shaped holes are omitted, and each graphene film is punched;
step 2: two polytetrafluoroethylene films and three graphene films are stacked in a staggered mode, conductive silver adhesive is coated between every two adjacent polytetrafluoroethylene films and every two adjacent graphene films, and standing is carried out at room temperature to enable the conductive silver adhesive to be solidified;
and step 3: and leading out wires from the uppermost layer graphene film and the lowermost layer graphene film to obtain the piezoelectric energy collector.
As shown in tables 1 to 3 below, for the test results of the open-circuit voltage effective value, the short-circuit current effective value, and the load characteristics of the output power of the piezoelectric ceramic energy collectors according to embodiments 1 and 2 of the present invention and the conventional piezoelectric ceramic energy collector under different load resistances, it can be seen that the piezoelectric energy collector according to the present invention has larger short-circuit current, open-circuit voltage, and output power than the conventional piezoelectric energy collector, and particularly after the arc-shaped through hole is formed, the output power, the open-circuit voltage, and the short-circuit current are all significantly improved.
Table 1 relationship between effective current value and external load of piezoelectric energy harvester
TABLE 2 relationship between output power of piezoelectric energy harvester and external load
TABLE 3 relationship between effective voltage value and external load of piezoelectric energy harvester
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. The piezoelectric energy collector is characterized by comprising graphene films (1) and flexible electroactive polymer films (2) which are alternately stacked at intervals, wherein leads are respectively led out from the uppermost graphene film and the lowermost graphene film, a rectangular through hole and an arc-shaped through hole (13) are formed in each graphene film (1), and the aspect ratio of each rectangular through hole is 4-6: 1-2, the rectangle through-hole includes vertical through-hole (11) and horizontal through-hole (12), vertical through-hole (11) include the multiseriate, and every vertical through-hole (11) left and right sides that is listed as all is provided with horizontal through-hole (12), horizontal through-hole (12) are provided with the multirow, and every horizontal through-hole (12) that is arranged all includes the multiunit, and every horizontal through-hole (12) of group 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 coincidence of the convex through-hole (13) that are located same horizontal through.
2. The piezoelectric energy harvester according to claim 1, wherein the method of preparing 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 (polyethylene terephthalate) film, and drying to form a graphene oxide film (1);
step 2: treating the graphene oxide film (1) obtained in the step (1) at the temperature of 600-1000 ℃ for 1 hour under the protection of argon, and then reducing the graphene oxide film (1) at the high temperature of 2000-3000 ℃ to obtain the treated graphene oxide film (1);
and step 3: and (3) rolling the treated graphene oxide film (1) obtained in the last step into a film of 30-80 μm to obtain the high-conductivity graphene oxide film (1).
3. The piezoelectric energy harvester of claim 1, wherein the flexible electroactive polymer film (2) has a thickness of 50-100 μ ι η.
4. The piezoelectric energy harvester of claim 1, wherein 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.
5. 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 vinylidene fluoride, tetrafluoroethylene, and hexafluoropropylene terpolymers.
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 true CN112600461A (en) | 2021-04-02 |
| CN112600461B CN112600461B (en) | 2023-08-11 |
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| CN202011414038.5A Active CN112600461B (en) | 2020-12-04 | 2020-12-04 | Piezoelectric energy collector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113630040A (en) * | 2021-08-11 | 2021-11-09 | 武汉理工大学 | Flexible piezoelectric energy collection system based on graphene assembly film |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111682796A (en) * | 2020-05-20 | 2020-09-18 | 武汉汉烯科技有限公司 | Flexible piezoelectric energy collector based on negative Poisson ratio macroscopic graphene film |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111682796A (en) * | 2020-05-20 | 2020-09-18 | 武汉汉烯科技有限公司 | Flexible piezoelectric energy collector based on negative Poisson ratio macroscopic graphene film |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113630040A (en) * | 2021-08-11 | 2021-11-09 | 武汉理工大学 | Flexible piezoelectric energy collection system based on graphene assembly film |
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| CN112600461B (en) | 2023-08-11 |
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