CN106328803A - Piezoelectric energy recycling device and preparation method thereof - Google Patents
Piezoelectric energy recycling device and preparation method thereof Download PDFInfo
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- CN106328803A CN106328803A CN201610889349.4A CN201610889349A CN106328803A CN 106328803 A CN106328803 A CN 106328803A CN 201610889349 A CN201610889349 A CN 201610889349A CN 106328803 A CN106328803 A CN 106328803A
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- piezoelectric
- energy recovery
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- interdigital electrode
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/30—Piezoelectric or electrostrictive devices with mechanical input and electrical output, e.g. functioning as generators or sensors
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/01—Manufacture or treatment
- H10N30/09—Forming piezoelectric or electrostrictive materials
- H10N30/093—Forming inorganic materials
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/85—Piezoelectric or electrostrictive active materials
- H10N30/853—Ceramic compositions
- H10N30/8542—Alkali metal based oxides, e.g. lithium, sodium or potassium niobates
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/85—Piezoelectric or electrostrictive active materials
- H10N30/853—Ceramic compositions
- H10N30/8561—Bismuth based oxides
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/88—Mounts; Supports; Enclosures; Casings
Abstract
The invention discloses a piezoelectric energy recycling device which comprises piezoelectric nano-fiber materials, polydimethylsiloxane, an output end electrode and wire, a golden interdigital electrode and a flexible substrate. The golden interdigital electrode is arranged on one side of the flexible substrate in a coated manner, the output end electrode and wire is electrically connected with the golden interdigital electrode, a mixed layer of the piezoelectric nano-fiber materials and the polydimethylsiloxane are arranged on one side with the golden interdigital electrode on the flexible substrate, and the piezoelectric nano-fiber materials, the flexible substrate and the golden interdigital electrode are fixedly packaged through the polydimethylsiloxane. The piezoelectric energy recycling device is small in volume, light in weight, green, environmentally friendly, good in toughness and excellent in comprehensive performance, can provide new solution schemes for energy problems in miniaturization and integration fields and generate a certain influences to entire intelligent wearing industries and development of intelligent cities and has good economic and social benefits.
Description
Technical field
The present invention relates to a kind of flexible environment friendly piezoelectric energy recovery device, belong to piezoelectric device field.
Background technology
Mechanical energy is one of energy the most extensive and abundant in environment, realizes reclaiming by the mechanical energy in environment, gives with oneself
The movement carried or implantable medical device (such as the human body custodial care facility such as cardiotachometer, pedometer) are powered so that it is long-time
Use without changing power supply or battery, be fully achieved self-driven, attracted to study widely interest.Based on piezoelectric effect
Piezoelectric energy catcher, effectively changes with electric energy because realizing mechanical energy, receives significant attention, how to improve current piezoelectric energy
The output voltage of collecting device and power, reaching mobile electronic device requirement becomes the key of application.
In current piezoelectric energy recovery device, Wang Zhonglin et al. takes the lead in carrying out correlational study work, and being prepared for one is
The de minimis energy of row reclaims device, the mainly ZnO piezoelectric semiconductor of employing (Science 312 (2006) 242 246,
Science 316 (2007) 102 105, Nano Lett.10 (2010) 3151-3155).It is contemplated that piezoelectric semiconductor ZnO
As the core material of piezoelectric nano electromotor, its piezoelectric modulus and electromechanical coupling factor are little, can significantly limit the output of device
Power and efficiency.In order to improve output voltage and the power of device further, Xu et al. utilizes the Pb with perovskite structure
(Mg1/3Nb2/3)O3-PbTiO3High-tension electricity and mechanical-electric coupling performance be prepared for the collection of energy device that is combined, significantly improve device
The output (Nano Lett.13 (2013) 2393-2398) of part, it should be noted however that the high (quality of this kind of system lead tolerance
Percentage ratio reaches more than 60%), human body and environment are brought significant damage, each developed country of the world has made laws to lead base piezoresistive material
The use of material has carried out clearly limiting.
Summary of the invention
It is an object of the invention to prepare a kind of flexibility, environmental protection, wearable piezoelectric energy recovery device.On the one hand,
In order to improve output voltage and the electric current of device, and beneficially environmental conservation, present invention employs current lead base piezoelectric
(perovskite solid solution such as BNT-xBT based on bismuth-sodium titanate is in quasi-homotype for one of replacement being expected to bismuth-sodium titanate base piezoelectricity system
There is near phase boundary (MPB) excellent piezoelectricity respond with mechanical-electric coupling)；On the other hand, due to the vibrational energy in external environment
Frequency is relatively low, and for being carried out efficient recovery, the present invention uses the BNT-xBT of form of nanofibers, and utilizes organic soft
Property material polydimethylsiloxane be packaged, so can utilize its bending isotype low frequency feature more effectively realize the external world
Energy regenerating.
A kind of piezoelectric energy recovery device, including piezoelectric nano fibrous material, polydimethylsiloxane, output terminal electrode and
Wire, gold interdigital electrode and flexible substrates plate, and gold interdigital electrode plating is located at the side of flexible substrates plate, and output terminal electrode and
Wire is electrically connected with gold interdigital electrode, and the mixed layer of piezoelectric nano fibrous material and polydimethylsiloxane is located at flexible substrates
Plate be provided with gold interdigital electrode side, on piezoelectric nano fibrous material, flexible substrates plate and gold interdigital electrode by poly-diformazan
Radical siloxane is packaged fixing.
Piezoelectric energy recovery device size is length 50mm, width 15mm, thickness 1mm.
The thickness of flexible substrates plate is 0.05-0.15mm.
Adjacent interdigital spacing range is 0.5-3mm.
The fibrolaminar thickness of piezoelectric nano is 50-500 μm.
The fibrolaminar fiber of piezoelectric nano is straight long fibre, and the fibrolaminar fibre diameter of piezoelectric nano is 100-300nm.
Piezoelectric nano fibrous layer is BNT-xBT nanofiber, and Barium metatitanate. molar content is 0.04-0.10.
BNT-xBT is 15% with BNT-xBT mass percent in the mixed layer of polydimethylsiloxane.
A kind of piezoelectric energy recovery device preparation method, comprises the following steps:
Electrostatic spinning process prepares the piezoelectric nano fibrous material of BNT-xBT, and the Barium metatitanate. molar content chosen is 0.07,
The BNT-0.07BT nanofiber heat treatment 2h at 750 DEG C that will prepare；
On the flexible substrates plate that one side is coated with gold interdigital electrode, coat one layer of BNT-0.07BT and polydimethylsiloxane
Mixed layer, the outfan in interdigital electrode utilizes electric cautery to draw two wires, for voltage and testing current, to be solidified completes
After, outer layer is packaged further with polydimethylsiloxane and solidifies 48h molding at 25 DEG C；
By the device for preparing in 80 DEG C of polarization, polarizing voltage 5kV/mm, the polarization time is 1h, the coldest after having polarized
But to room temperature.
In sum, the present invention is that one has that small size, lightweight, environmental protection, pliability be good, high comprehensive performance
Piezoelectric energy recovery device.Can be that the energy problem that integrated field is miniaturized provides new solution, it is possible to whole
Intelligence is dressed the development of industry and intelligent city and is produced certain impact, will bring good economic and social benefit therewith.
Accompanying drawing explanation
Below in conjunction with embodiment and accompanying drawing, the present invention is described in detail, wherein:
Fig. 1 is piezoelectric energy recovery device junction composition based on BNT-0.07BT nanofiber.
Fig. 2 is the shape appearance figure of the BNT-0.07BT nanofiber at 750 DEG C after heat treatment.
Fig. 3 is the phase structure figure of the BNT-0.07BT nanofiber at 750 DEG C after heat treatment.
Fig. 4 is displacement (Displacement) and phase place (Phase) the response signal of BNT-0.07BT nanofiber microcell
Figure.
Fig. 5 is displacement (Displacement) and phase place (Phase) the response signal of BNT-0.04BT nanofiber microcell
Figure.
Fig. 6 is the output voltage waveform at dynamic excitation lower piezoelectric energy regenerating device.
Detailed description of the invention
The detailed description of the invention of the present invention be expanded on further below in conjunction with the accompanying drawings:
The structure of flexible piezoelectric energy regenerating device is as shown in Figure 1.
The core piezoelectric element that device uses is binary system BNT-xBT leadless piezoelectric material material, during wherein x is BNT-xBT
The molar content of BT, the component chosen is positioned at MPB near zone, has excellent piezoelectricity and mechanical-electric coupling performance, can significantly carry
The output voltage of high piezoelectric micromotor energy catcher at present and power.The material forms used is one-dimensional nanofiber, with body material
Compared with thin film, fiber has big draw ratio, easily realizes the feature of bending, is suitable for preparing the piezoelectricity energy of small size, lightweight
Amount collecting device, it is simple to the miniaturization of relevant information processing means is with integrated.
Device architecture is as it is shown in figure 1, device uses interdigitated electrode structure, and mid portion is that one side is coated with gold interdigital electrode
Flexible substrates plate 3, thickness about 0.1mm.Its upper section is initially coated with one layer of thin BNT-xBT nanofiber layer 4, thickness 50-500
μm, extraction wire 2 in interdigital electrode two ends is as output electrode end, and whole device uses polydimethylsiloxane 1 to encapsulate, and encapsulation is solid
The device changed polarizes at high temperature under high pressure, polarization time about 15-60min, polarized electric field 4-8kV/mm, poling temperature
60-100℃.The device example polarized can be tested, and utilizes oscillograph and galvanometer to measure output open circuit respectively during test
Voltage and short circuit current.Device work is based on piezoelectric effect principle, and when by ambient pressure with deformation equal excitation, each is sent out
Electric unit can produce deformation accordingly, thus causes piezoelectric electric polarization to change, and produces corresponding voltage simultaneously
Export with electric current.
Interdigitated electrode structure employed in device, each adjacent interdigital be a generator unit, multiple unit machinery strings
Connection, electrical parallel can increase signal output, in order to make polarization more abundant, play the piezoelectric property of BNT-xBT, choose in experiment
Adjacent interdigital spacing range is 0.5-3mm.
First the piezoelectric energy recovery device preparation method of the present invention prepares BNT-xBT's initially with electrostatic spinning process
Piezoelectric nano fibrous material, the Barium metatitanate. molar content chosen is 0.07, is existed by the BNT-0.07BT nanofiber prepared
Heat treatment 2h at 750 DEG C, the fiber morphology obtained as in figure 2 it is shown, fiber length and straight, diameter about 100-300nm.X is utilized to penetrate
Line diffractometer (XRD) characterizes its phase structure, as it is shown on figure 3, as seen from the figure, has pure perovskite structure, is not detected by miscellaneous
Phase.Utilizing piezoelectric forces microscope (PFM) to characterize the piezoelectric property of fiber, as shown in Figure 4, equivalence piezoelectric modulus is up to 109pm/V,
By contrast, the fiber away from MPB component has relatively small piezoelectric response, such as the equivalent piezoelectricity system of BNT-0.04BT fiber
Number is 73pm/V, and its microcell responds as shown in Figure 5.
In device fabrication process, first it is coated with at one side on the flexible substrates plate of gold interdigital electrode, coats one layer of BNT-
0.07BT and the mixed layer (BNT-0.07BT mass percent is 15%) of polydimethylsiloxane, at the outfan of interdigital electrode
Utilize electric cautery to draw two wires, for voltage and testing current, to be solidified complete after, outer layer is further with poly dimethyl silicon
Oxygen alkane is packaged and solidifies 48h molding at 25 DEG C, and device size is length 50mm, width 15mm, thickness 1mm.
By the device for preparing in 80 DEG C of polarization, polarizing voltage 5kV/mm, the polarization time is 1h, the coldest after having polarized
But to room temperature.
When measuring the output voltage of device, two output leads are commonly connected on oscillograph, use varying strength, frequently
The pressure of rate taps, and obtains the output of periodic voltage.Along with the increase of the dynamics of percussion, output voltage is continuously increased,
High output can reach more than 30V, and mean power reaches 8.7 μ W, as it is shown in figure 5, realize by designing corresponding exciting circuit
LED is self-driven.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any amendment, equivalent and the improvement etc. made within god and principle, should be included within the scope of the present invention.
Claims (10)
1. a piezoelectric energy recovery device, it is characterised in that include piezoelectric nano fibrous material, polydimethylsiloxane, defeated
Go out termination electrode and wire, gold interdigital electrode and flexible substrates plate, and the side of flexible substrates plate is located in gold interdigital electrode plating, and defeated
Going out termination electrode and wire to be electrically connected with gold interdigital electrode, the mixed layer of piezoelectric nano fibrous material and polydimethylsiloxane sets
In flexible substrates plate be provided with gold interdigital electrode side, on piezoelectric nano fibrous material, flexible substrates plate and gold interdigital electrode
It is packaged fixing by polydimethylsiloxane.
Piezoelectric energy recovery device the most according to claim 1, it is characterised in that piezoelectric energy recovery device size is for long
Degree 50mm, width 15mm, thickness 1mm.
Piezoelectric energy recovery device the most according to claim 1, it is characterised in that the thickness of flexible substrates plate is 0.05-
0.15mm。
Piezoelectric energy recovery device the most according to claim 1, it is characterised in that adjacent interdigital spacing range is 0.5-
3mm。
Piezoelectric energy recovery device the most according to claim 1, it is characterised in that the fibrolaminar thickness of piezoelectric nano is
50-500μm。
Piezoelectric energy recovery device the most according to claim 5, it is characterised in that the fibrolaminar fiber of piezoelectric nano is flat
Straight long fibre, the fibrolaminar fibre diameter of piezoelectric nano is 100-300nm.
Piezoelectric energy recovery device the most according to claim 6, it is characterised in that piezoelectric nano fibrous layer is (1-x)
Bi0.5Na0.5TiO3-xBaTiO3(BNT-xBT) nanofiber, Barium metatitanate. molar content is 0.04-0.10.
Piezoelectric energy recovery device the most according to claim 7, it is characterised in that Barium metatitanate. molar content is 0.07.
Piezoelectric energy recovery device the most as claimed in any of claims 1 to 7, it is characterised in that BNT-xBT is with poly-
In the mixed layer of dimethyl siloxane, BNT-xBT mass percent is 15%.
10. preparing the piezoelectric energy recovery device preparation method described in any one in claim 1 to 9, its feature exists
In, comprise the following steps:
Electrostatic spinning process prepares the piezoelectric nano fibrous material of BNT-xBT, and the Barium metatitanate. molar content chosen is 0.07, will system
The standby BNT-0.07BT nanofiber heat treatment 2h at 750 DEG C obtained；
On the flexible substrates plate that one side is coated with gold interdigital electrode, coat the mixing of one layer of BNT-xBT and polydimethylsiloxane
Layer, the outfan in interdigital electrode utilizes electric cautery to draw two wires, for voltage and testing current, to be solidified complete after, outward
Layer is packaged further with polydimethylsiloxane and solidifies 48h molding at 25 DEG C；
By the device for preparing in 80 DEG C of polarization, polarizing voltage 5kV/mm, the polarization time is 1h, naturally cools to after having polarized
Room temperature.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107039578A (en) * | 2017-04-10 | 2017-08-11 | 东南大学 | A kind of preparation method for exempting from polarized piezoelectric base electro-mechanical conversion element |
| WO2023009828A1 (en) * | 2021-07-29 | 2023-02-02 | Trustees Of Dartmouth College | Flexible piezoelectric array for wearable blood pressure sensing |
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| KR101585506B1 (en) * | 2014-12-09 | 2016-01-15 | 국방과학연구소 | Piezoelectric device with pvdf fiber array by using electrospinning and fabricating method thereof |
| CN105591022A (en) * | 2016-01-15 | 2016-05-18 | 东南大学 | Preparation method of flexible nanogenerator made of potassium-sodium niobate fiber-based composite materials |
| CN105870316A (en) * | 2016-05-23 | 2016-08-17 | 武汉大学 | Flexible piezoelectric energy collector and manufacturing method thereof |
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| CN104409625A (en) * | 2014-10-14 | 2015-03-11 | 湖北大学 | Preparing method of KNN piezoelectric nanofiber flexible electricity generating element |
| KR101585506B1 (en) * | 2014-12-09 | 2016-01-15 | 국방과학연구소 | Piezoelectric device with pvdf fiber array by using electrospinning and fabricating method thereof |
| CN105591022A (en) * | 2016-01-15 | 2016-05-18 | 东南大学 | Preparation method of flexible nanogenerator made of potassium-sodium niobate fiber-based composite materials |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107039578A (en) * | 2017-04-10 | 2017-08-11 | 东南大学 | A kind of preparation method for exempting from polarized piezoelectric base electro-mechanical conversion element |
| WO2023009828A1 (en) * | 2021-07-29 | 2023-02-02 | Trustees Of Dartmouth College | Flexible piezoelectric array for wearable blood pressure sensing |
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