CN216774635U - Interdigital structure composite nano generator - Google Patents
Interdigital structure composite nano generator Download PDFInfo
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- CN216774635U CN216774635U CN202123227840.6U CN202123227840U CN216774635U CN 216774635 U CN216774635 U CN 216774635U CN 202123227840 U CN202123227840 U CN 202123227840U CN 216774635 U CN216774635 U CN 216774635U
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Abstract
The utility model provides an interdigital structure composite nano generator, which comprises a piezoelectric nano generator and a friction nano generator which are stacked; the piezoelectric nano generator comprises two stretchable electrodes and a piezoelectric generating component positioned between the two stretchable electrodes; the friction nano generator comprises two stretchable electrodes and two friction generating components positioned between the two stretchable electrodes, wherein the two friction generating components are in contact with each other in an interdigital structure; the piezoelectric nano-generator and the friction nano-generator which are adjacent share a stretchable electrode, and the piezoelectric generating assembly is fixedly connected with one of the friction generating assemblies through the shared stretchable electrode. The mechanical energy generated by the environment and stretched/compressed in the horizontal or vertical direction can be collected, and the mechanical energy-electric energy conversion efficiency is improved.
Description
Technical Field
The utility model belongs to the technical field of nano power generation, and particularly relates to an interdigital structure composite nano generator.
Background
In general, the environment is flooded with a variety of inexhaustible convertible energies, such as thermal, light, chemical and mechanical energy. The renewable energy sources are collected and utilized, so that the environmental deterioration crisis and the climate greenhouse effect caused by resource shortage can be effectively solved. Has important significance for improving the ecological environment and the sustainable development of resources.
In recent years, with the tremendous development and wide consumption of countless intelligent and portable electronic products including communication, sensors, and even the internet of things, there is a great trend towards self-charging/power supply electronic systems that support or change energy storage elements. The nano generator is used for taking energy from the environment and converting the energy into electric energy, so that a device or a system with low power consumption can be powered. The mechanical energy has the characteristics of high energy density, wide distribution, various expression forms, easy conversion and the like, and is a preferred choice for collecting environmental energy. The developed and mature mechanical energy collector mainly comprises a piezoelectric, electromagnetic and friction nanometer generator. However, the single mechanical energy-electric energy conversion device has limitations, such as low conversion efficiency of the piezoelectric nano-generator, high susceptibility of the friction nano-generator to external environment, complex manufacturing process of the electromagnetic nano-generator, and the like. At present, the developed piezoelectric-friction composite nano generator mainly adopts pressure driving in the vertical direction, and the relative displacement of a friction power generation assembly is too small or even static friction exists, so that the transfer of weak electric charge of a friction effect is small, and the output performance of the composite nano generator is not excellent. Therefore, it is necessary to provide a piezoelectric-friction composite nano generator with simple structure and high output, and to improve the mechanical energy-electric energy conversion efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an interdigital structure composite nano generator which can collect mechanical energy generated by the environment and stretched/compressed in the horizontal or vertical direction, is a piezoelectric-friction composite nano generator with simple structure and high output, and improves the mechanical energy-electric energy conversion efficiency.
The utility model is realized by the following technical scheme:
an interdigital structure composite nano generator comprises a piezoelectric nano generator and a friction nano generator which are stacked; the piezoelectric nano generator comprises two stretchable electrodes and a piezoelectric generating component positioned between the two stretchable electrodes; the friction nano generator comprises two stretchable electrodes and two friction generating components positioned between the two stretchable electrodes, wherein the two friction generating components are in contact in an interdigital structure; the piezoelectric nano-generator and the friction nano-generator which are adjacent share a stretchable electrode, and the piezoelectric generating assembly is fixedly connected with one of the friction generating assemblies through the shared stretchable electrode.
Preferably, in the adjacent piezoelectric nano generator and friction nano generator, an insulating cushion layer is arranged between the piezoelectric generating component and the other friction generating component.
Preferably, the stretchable electrode has a serpentine structure, a wave structure or a grid structure.
Preferably, a support layer is disposed within the friction electricity generating assembly.
Preferably, the number of the piezoelectric nano generators is two, the number of the friction nano generators is one, and the friction nano generator is arranged between the two piezoelectric nano generators.
Preferably, the piezoelectric nano-generator and the friction nano-generator are respectively arranged in a plurality of numbers, and the piezoelectric nano-generator and the friction nano-generator are alternately stacked.
Preferably, the stretchable electrode is connected to an external rectifying circuit.
Preferably, the stretchable electrode has a thickness of 10nm to 10 mm.
Compared with the prior art, the utility model has the following beneficial effects:
the composite nano generator combines the piezoelectric nano generator and the friction nano generator, and the first friction component and the second friction component are contacted in an interdigital structure, so that the friction surface area is increased, the electronic exchange effect is increased, the defects of low output voltage of the single piezoelectric nano generator and low output current of the single friction nano generator can be overcome, the piezoelectric-friction response can be simultaneously made to the stretching/compressing mechanical energy in the vertical direction and the horizontal direction, and the output power density of the composite nano generator is improved.
Furthermore, because the electric charge generated on one surface of the piezoelectric component is opposite to the electric charge generated on the friction component opposite to the friction component fixedly connected with the piezoelectric component, and the piezoelectric component is prevented from contacting with the opposite friction component to generate electric charge recombination, an insulating cushion layer is adopted to realize a gap between the piezoelectric component and the opposite friction component, and on the other hand, the composite nano-generator can be integrally flat and uniformly stressed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:
fig. 1 is a schematic cross-sectional view of a composite nano-generator according to an embodiment of the present invention;
fig. 2 is an exemplary cross-sectional view of a piezoelectric nanogenerator in a composite nanogenerator according to the utility model;
fig. 3 is an exemplary cross-sectional view of a triboelectric nanogenerator in a composite nanogenerator according to the utility model;
fig. 4 is an exemplary cross-sectional view of a stretchable electrode in a composite nanogenerator according to the utility model;
FIG. 5 is a schematic cross-sectional view of the charge generated on the corresponding electrodes when a composite nano-generator according to one embodiment of the present invention is subjected to tension/compression;
the circuit connection form of the composite nanogenerator shown in fig. 1 is shown in fig. 6;
fig. 7 is a schematic cross-sectional view of a composite nano-generator according to still another embodiment of the present invention;
fig. 8 is a schematic cross-sectional view of a support layer structure used when the friction member in the composite nanogenerator according to the utility model is a soft friction material.
In the figure: the piezoelectric power generation device comprises a piezoelectric power generation component 1, a first friction power generation component 2, a second friction power generation component 3, a stretchable electrode 4, an insulating cushion layer 5, a piezoelectric nano generator 6, a friction nano generator 7, a supporting layer 8 and a rectifying circuit 9.
Detailed Description
The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The utility model provides a composite nano generator with an interdigital structure, which comprises a piezoelectric nano generator 6 and a friction nano generator 7 which are stacked, wherein a piezoelectric generating component of the piezoelectric nano generator is fixedly connected with a friction generating component of the friction nano generator 7 through a common stretchable electrode 4, a first friction generating component 2 and a second friction generating component 3 of the friction nano generator 7 are realized in an interdigital structure mode, and in order to prevent the piezoelectric nano generator and the opposite friction components from charge recombination, such as the piezoelectric generating component 1 and the friction generating component 3, an insulating cushion layer 5 is adopted to realize non-contact between the piezoelectric nano generator and the opposite friction components.
The utility model is not limited to the specific structure of the insulating pad 5 as long as it can prevent the piezoelectric generating component of the piezoelectric nano-generator 6 from contacting the friction generating component of the opposite friction nano-generator 7. For example, the insulating mat 5 may form an arch structure, a square structure, or the like between the piezoelectric power generating element 1 and the friction power generating element 3.
Preferably, in an interdigital structure composite type nanogenerator according to the utility model, the structure of the piezoelectric nanogenerator 6 can adopt a structure as shown in the schematic cross-sectional view of fig. 2, wherein the piezoelectric nanogenerator 6 can comprise two stretchable electrodes 4 and a piezoelectric generating component 1, and the piezoelectric generating component 1 is positioned between the two stretchable electrodes 4. The piezoelectric nano generator is based on a piezoelectric effect and is used for generating deformation to form potential difference when being stretched/compressed in the horizontal or vertical direction and converting mechanical energy in the environment into electric energy. The piezoelectric nano generator is fixedly connected with the friction generating component through the stretchable electrode, and due to the piezoelectric effect, different types of charges formed on the opposite surfaces of the piezoelectric generating component can have an adsorption effect on corresponding charges generated by the friction component. The stretchable electrode 4 may be formed of a conductive material such as a metal, metal alloy, metal oxide (e.g., indium oxide), etc., and may have a thickness of 10nm to 10 mm. The piezoelectric power generation element 1 may be formed of piezoelectric ceramics such as lead zirconate titanate (PZT), zinc oxide, polyvinylidene fluoride (PVDF), and oxides, polymers, or the like. In addition, the piezoelectric polarization direction of the piezoelectric nanogenerator 6 can be up and down, and the present invention is not limited thereto.
It should be understood that the structure of the stretchable electrode 4 as described above is merely an example as shown in fig. 4, and in fact, the present invention does not limit the specific structure of the stretchable electrode 4, that is, any stretchable structure of the electrode layer structure may be applied to the structure of the composite nanogenerator according to the present invention. Such as: serpentine structures, wave structures, grid structures, etc.
It should be understood that the above-described structure of the piezoelectric nanogenerator 6 is merely an example, and actually, the present invention does not limit the specific structure of the piezoelectric nanogenerator 6, that is, any structure of the piezoelectric nanogenerator structure may be applied to the structure of the composite nanogenerator according to the utility model.
Preferably, in an interdigitated structure composite type nanogenerator according to the present invention, as shown in fig. 3, the triboelectric nanogenerator 7 may include a first triboelectric-generating component 2, a second triboelectric-generating component 3, and a stretchable electrode 4 laid. The friction nano generator is based on the friction electricity generation effect of two different substances, and a friction potential difference is generated between the first friction assembly and the second friction assembly when the first friction assembly and the second friction assembly are stretched/compressed in the horizontal or vertical direction, so that mechanical energy in the environment can be converted into electric energy. The charges formed in the stretching/compressing process can form a potential difference through the outflow of the conducting wire in real time, and no charge recombination exists, so that a space does not need to be arranged between the first friction component and the second friction component. The stretchable electrode 4 may be formed of a conductive material such as a metal, metal alloy, metal oxide (e.g., indium oxide), etc., and may have a thickness of 10nm to 10mm, as described above. The first friction power generation assembly 2 is preferably made of a material with strong electron capacity, such as a dielectric material of polytetrafluoroethylene, polyimide, and the like. The second friction power generation element 3 is preferably made of a material having a strong electron losing ability, such as aniline resin, ethyl cellulose, or the like.
As shown in fig. 8, if the first friction power generation element 2 and the second friction power generation element 3 selected by the friction nano-generator 7 are made of soft materials, the support layer 8 may be further used for shaping to prevent deformation from failing to recover during stretching/compression. The support layer 8 may be formed of a polymer, such as polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), or the like.
The working principle of the composite nanogenerator according to the utility model is described below by taking the composite nanogenerator shown in fig. 1 as an example: when the friction nano-generator 7 is stimulated by a mechanical force of stretching/compressing in the horizontal or vertical direction, the surface of the first friction power generation assembly 2 and the surface of the second friction power generation assembly 3 are relatively displaced, so that separation and transfer of electrons are caused, the surface of the first friction power generation assembly 2 is charged with negative charges, the second friction power generation assembly 3 generates positive charges, an external circuit is connected with the stretchable electrodes of the friction power generation assemblies, directional movement of the charges is formed by discharging the charges in the stretchable electrodes, electric energy is output, and a friction potential difference is generated between the first friction power generation assembly and the second friction power generation assembly. Meanwhile, the piezoelectric power generation assembly 1 deforms to generate a potential difference on the upper and lower surfaces of the piezoelectric power generation assembly 1, opposite charges are induced on the surfaces of the stretchable electrodes 4 on the two sides of the piezoelectric power generation assembly 1, and when an external circuit is switched on, the charges move directionally to form current, so that electric energy is output. The power supply to the small-sized electric equipment can be directly realized in real time through the rectifying circuit. Thus, the purpose of generating electricity by using mechanical energy by using the composite nano-generator according to the utility model is achieved. The insulating cushion layer can prevent the piezoelectric power generation component from contacting with another friction power generation component, and the output performance of the nano generator is reduced due to the fact that charges generated by the piezoelectric power generation component and the friction power generation component are different and can be subjected to charge recombination.
In addition, a circuit connection form of the composite nanogenerator shown in fig. 5 is shown in fig. 6. The stretchable electrode at the lower end of the piezoelectric nano generator 6 at the top and the stretchable electrode at the upper end of the first friction power generation assembly 2 shown in fig. 5 are common electrodes, the common electrodes and the charges in the stretchable electrodes at the lower end of the piezoelectric nano generator 6 at the bottom are the same negative charges, and the common electrodes and the stretchable electrodes are connected through an external lead and then connected to the rectification circuit 9. On the contrary, the stretchable electrode at the upper end of the piezoelectric nano generator 6 at the bottom and the stretchable electrode at the bottom end of the third friction power generation assembly 3 are common electrodes, the common electrodes and the electric charges in the stretchable electrodes at the upper end of the piezoelectric nano generator 6 at the top are the same positive charges, and the common electrodes and the stretchable electrodes are connected with the rectifying circuit 9 after being connected through the external lead. After passing through the rectifying circuit 9, the output current can directly supply power to the micro device in real time.
Fig. 7 is a schematic cross-sectional view of another embodiment of the composite nanogenerator, which is composed of the piezoelectric nanogenerator 6 shown in fig. 2 and the triboelectric nanogenerator 7 shown in fig. 3. The composite nanometer generator comprises a piezoelectric nanometer generator 6, a friction nanometer generator 7 and an insulating cushion layer 5, wherein the piezoelectric nanometer generator 6 and the friction nanometer generator 7 are respectively provided with a plurality of parts, and the piezoelectric nanometer generator 6 and the friction nanometer generator 7 are alternately stacked. The piezoelectric nano-generator 6 comprises a piezoelectric generating component 1 and two stretchable electrodes 4 on two sides, and the friction nano-generator 7 comprises a first friction generating component 2, a second friction generating component 3 and a stretchable electrode 4 on the surface. The insulating cushion layer 5 prevents the piezoelectric generating component from contacting with another friction generating component, and the output performance of the nano generator is reduced due to the fact that charges generated by the piezoelectric generating component and the friction generating component are different and are subjected to charge recombination. The stretchable electrode 4 may be formed of a conductive material such as a metal, a metal alloy, a metal oxide (e.g., indium oxide), and the like, and the thickness thereof may be 10nm to 10mm, and the specific structure is not limited. The piezoelectric power generation element 2 may be formed of piezoelectric ceramics such as lead zirconate titanate (PZT), zinc oxide, and PVDF, or an oxide or a polymer. The first friction power generation element 2 is preferably made of a material with strong electron capability, such as a dielectric material, for example, polytetrafluoroethylene, polyimide, or the like. The second friction power generation component is preferably a material having a strong electron losing ability, such as aniline form resin, ethyl cellulose, or the like.
The operation principle of the composite nanogenerator according to still another embodiment shown in fig. 7 is the same as that of the composite nanogenerator of the circuit diagram shown in fig. 1.
In addition, it should be understood that, while the operation principle of an interdigital structure composite type nanogenerator according to the utility model is described in conjunction with the composite nanogenerator structure of fig. 1, it is the first and second frictional electricity-generating components 2 and 3 in the nanogenerator 7 that are rubbed to deform the piezoelectric electricity-generating components in the piezoelectric nanogenerator 6; however, in the actual power generation process, the first friction power generation element 2 and the second friction power generation element 3 in the friction nano-generator 7 may be displaced relative to each other by pressing and deforming the piezoelectric power generation element 1 in the piezoelectric nano-generator 6 by an external force to generate piezoelectric power. Both forms of power generation are possible.
The preferred embodiment of the interdigital structure composite type nano-generator of the present invention is described in detail above with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiment, and various simple modifications can be made to the technical solution of the present invention within the technical concept of the present invention, and these simple modifications all fall into the protection scope of the present invention. It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the utility model. The utility model is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (8)
1. The interdigital structure composite nano generator is characterized by comprising a piezoelectric nano generator (6) and a friction nano generator (7) which are stacked; the piezoelectric nano generator (6) comprises two stretchable electrodes (4) and a piezoelectric power generation component (1) positioned between the two stretchable electrodes (4); the friction nano generator (7) comprises two stretchable electrodes (4) and two friction generating components positioned between the two stretchable electrodes (4), wherein the two friction generating components are in contact with each other in an interdigital structure; the piezoelectric nano-generator (6) and the friction nano-generator (7) which are adjacent share one stretchable electrode (4), and the piezoelectric generating assembly (1) is fixedly connected with one of the friction generating assemblies through the shared stretchable electrode (4).
2. The interdigital structure composite type nano-generator according to claim 1, wherein in the adjacent piezoelectric nano-generator (6) and friction nano-generator (7), an insulating cushion layer (5) is arranged between the piezoelectric generating component (1) and the other friction generating component.
3. The interdigital structure composite nanogenerator according to claim 1, wherein the stretchable electrode (4) has a serpentine structure, a wave structure or a mesh structure.
4. The interdigital structure composite type nanogenerator according to claim 1, wherein a support layer (8) is provided inside the frictional power generation component.
5. The interdigital structure composite type nanogenerator according to claim 1, wherein the piezoelectric nanogenerators (6) are provided in two, the friction nanogenerator (7) is provided in one, and the friction nanogenerator (7) is provided between the two piezoelectric nanogenerators (6).
6. The interdigital structure composite type nano-generator according to claim 1, wherein several piezoelectric nano-generators (6) and several friction nano-generators (7) are respectively provided, and the piezoelectric nano-generators (6) and the friction nano-generators (7) are alternately stacked.
7. The interdigital structure composite type nanogenerator according to claim 1, wherein the stretchable electrode (4) is connected to an external rectifying circuit (9).
8. The interdigital structure composite type nanogenerator of claim 1, wherein the stretchable electrode (4) has a thickness of 10nm to 10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123227840.6U CN216774635U (en) | 2021-12-21 | 2021-12-21 | Interdigital structure composite nano generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123227840.6U CN216774635U (en) | 2021-12-21 | 2021-12-21 | Interdigital structure composite nano generator |
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| CN216774635U true CN216774635U (en) | 2022-06-17 |
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