CN114977873A

CN114977873A - Ultrathin nanometer power generation assembly and application thereof

Info

Publication number: CN114977873A
Application number: CN202110219894.3A
Authority: CN
Inventors: 吴昌谋; 戈卡纳·莫哈娜·兰妮
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2022-08-30

Abstract

An ultra-thin nano-power generation assembly and applications thereof, comprising: a positive electricity composite layer, which is formed by laminating a positive electricity layer and a positive electricity layer electrode, wherein the positive electricity layer is made of foaming materials, the thickness of the positive electricity layer is less than 90 mu m, and the diameter of the foaming hole is less than 60 mu m; the ultrathin nanometer power generation assembly also comprises a negative electricity composite layer which is electrically connected with the positive electricity composite layer and comprises a negative electricity layer and a negative electricity layer electrode which are laminated; the ultrathin nanometer power generation assembly provided by the invention selects the polyurethane foam material as the positive electricity layer, the foam hole structure of the foam material is favorable for the effect of electron transfer during surface contact, the generator which is extremely thin and has excellent electric output efficiency can be manufactured, and the problems that the existing friction generator is too thick and has no flexibility are solved.

Description

Ultrathin nanometer power generation assembly and application thereof

Technical Field

The present invention relates to a power generation assembly and applications thereof, and more particularly, to a power generation assembly that is ultra-thin and nano-scaled and obtains electric power or motive force in mechanical contact between surfaces of components and applications thereof.

Background

The method for obtaining energy from the environment is a clean and sustainable green approach, and based on a nanometer friction generator (TENG) technology developed under a friction power generation effect (Triboelectric effect), mechanical energy in the environment can be converted into electric energy, so that the method has the advantages of high efficiency, large power, light weight and low cost.

The friction power generation effect is a process of generating opposite charge phenomena after two different material surfaces are contacted, then generating electric power or power, and outputting the generated electric power into usable power in a connecting component mode so as to drive small mechanical components or sensors and the like.

However, the thickness of the materials used in the current nano friction generator is not ideal, most of the layers are thicker than the common grade, the electric output efficiency is still not good, and the product competitiveness is lacked. In view of the above, there is a need for an ultra-thin nano-power generation assembly to solve the problems of the prior art, or to at least provide an alternative solution.

Disclosure of Invention

In order to solve the problems of over-thick thickness and poor electrical output efficiency of the existing nano friction generator, the invention provides an ultrathin nano power generation assembly, which comprises the following components: a positive electricity composite layer, which comprises a positive electricity layer and a positive electricity layer electrode which are laminated, wherein the positive electricity layer is made of foaming material, the thickness of the positive electricity layer is less than 90 mu m, and the diameter of a foaming hole is about less than 60 mu m; and a negative electricity composite layer electrically connected with the positive electricity composite layer and comprising a negative electricity layer and a negative electricity layer electrode which are laminated.

Wherein the positive electrode layer comprises polyurethane, magnesium fluoride, nylon, glass, cotton or polyethylene terephthalate film.

Wherein the negative electrode layer comprises urethane rubber, paper, wood, nitrile rubber, polycarbonate, acrylonitrile-butadiene-styrene copolymer, acryl, epoxy resin, styrene-butadiene rubber, polyethylene terephthalate fabric, ethylene-vinyl acetate copolymer, polystyrene, polyimide, silicone polymer, polyethylene, polypropylene, cellulose nitrate, polyvinyl chloride, or latex.

Wherein the foaming material comprises polyurethane.

Wherein, the negative electric layer is made of polytetrafluoroethylene material.

Wherein the positive layer electrode is a copper electrode.

Wherein the negative electrode layer electrode is an aluminum electrode.

Wherein the positive electrical layer generates an electrical output when in contact with the negative electrical layer.

The ultrathin nanometer power generation assembly provided by the invention can be applied to driving small components or sensors.

As can be seen from the above description, the present invention has the following advantages and beneficial effects:

1. according to the invention, the polyurethane foaming material is selected as the positive electricity layer, and the foaming hole structure is beneficial to the effect of electron transfer during surface contact, so that the beneficial effects of extremely thin and excellent electric output efficiency are achieved, and the problems that the existing friction generator is too thick and cannot be smoothly miniaturized are solved.

2. According to the invention, different electrical output results generated between the thickness of the positive electricity layer and the force application are measured through experiments, and the invention can be widely applied to the application of starting mechanical components or sensors and can generate different electrical performances according to different force applications.

Drawings

FIG. 1 is a schematic view of a preferred embodiment of the present invention;

FIG. 2 is a SEM image of several preferred embodiments of the present invention;

FIG. 3 is a SEM image of several preferred embodiments of the present invention;

FIG. 4 is a graph showing the relationship between the applied force and the voltage applied to a 5 μm sample according to the present invention;

FIGS. 5A-5D are graphs showing the relationship between the force applied and the voltage and current applied to a 10 μm sample according to the present invention;

FIGS. 6A and 6B are graphs showing the relationship between the force applied to a sample of 20 μm and the voltage and current according to the present invention;

FIG. 7 is a graph showing the relationship between the applied force and the voltage applied to a sample of 40 μm according to the present invention;

FIGS. 8A and 8B are graphs showing the relationship between the applied force and the voltage and current for a sample of 90 μm in accordance with the present invention;

FIGS. 9A, 9B, and 9C are a comparison of current and voltage for different thickness samples and corresponding applied force;

FIGS. 10A, 10B and 10C show the cross-sectional shapes and the surface sizes of 5 μm, 20 μm and 40 μm PU foams, respectively;

FIGS. 11A and 11B are SEM images of different porosities of 5 μm PU foams. Description of the symbols:

10 ultrathin nanometer power generation assembly

11 positive electric composite layer

111 positive electricity layer

113 positive electrode layer

13 negative electricity composite layer

131 negative electric layer

133 negative electrode

Detailed Description

The following detailed description of the embodiments of the present invention is provided to facilitate understanding and understanding of the technical solutions provided by the present invention, by referring to the embodiments and the accompanying drawings. It should be understood that the described embodiments of the present invention are only intended to assist understanding of the core technical concept of the present invention, and do not limit or explain the scope of the present invention in a single embodiment. The use of the terms "a," "an," "two," "first," "second," or "the" in the following description is for the purpose of describing structural elements more clearly and distinctly, and is not intended to be strictly limited to the singular of the terms of quantity.

Referring to fig. 1, a first inventive concept of the present invention provides an ultra-thin nano-power generation assembly 10, a first preferred embodiment of which includes a positive electrode composite layer 11, a negative electrode composite layer 13, wherein the positive electrode composite layer 11 and the negative electrode composite layer 13 are electrically connected to each other. Wherein: the positive electrode composite layer 11 includes a positive electrode layer 111 and a positive electrode layer 113 laminated, and the negative electrode layer 13 includes a negative electrode layer 131 and a negative electrode layer 133 laminated.

The positive electrode layer 11 in the positive electrode composite layer 11 is preferably a Polyurethane (PU) foam material with a porous structure, the thickness is between 5 to 90 μm, preferably 5 to 40 μm, more preferably 5 to 30 μm, even more preferably 5 to 20 μm, and the pore size is 15 to 60 μm, preferably 15 to 30 μm, even more preferably 15 μm. The thickness and pore size of the positive electrode layer 11 are preferably thinner and smaller, and more preferably, the more the pore distribution, i.e., the porosity is increased, in the power generation assembly provided by the present invention, so as to enhance the performance of the power generation assembly of the present invention. And the positive layer electrode 113 is preferably a copper electrode. The negative electrode layer 13 is preferably made of Polytetrafluoroethylene (PTFE) material with a thickness of 100-300 μm, preferably 150-250 μm, and the negative electrode layer 133 is preferably an aluminum electrode.

In the ultra-thin nano-power generation assembly 10 provided in this embodiment, when not in use, the positive electrode layer 111 faces the negative electrode layer 131, and the positive electrode layer 113 and the negative electrode layer 133 respectively disposed on the other sides of the positive electrode layer 11 and the negative electrode layer 13 are electrically connected to each other, so that the positive electrode layer 11 and the negative electrode layer 13 are not in contact with each other.

The positive electrode layer 111 and the negative electrode layer 131 are made of triboelectric materials with opposite charging characteristics, such as the PU foam material in the first preferred embodiment generates positive charges in the whole assembly, and the PTFE material generates or carries negative charges in the opposite direction, so that when the PU foam material layer and the PTFE material layer rub against each other, the positive charges and the negative charges are in contact to form a conducting current. The electrode layers combined in the positive electrode composite layer 11 and the negative electrode composite layer 13 are basically mainly copper electrodes and aluminum electrodes, and different matching modes can generate different electrical output performances, as shown in table 1 below.

TABLE 1

In another aspect, the materials of the positive electrode layer 111 and the negative electrode layer 131 can be selected according to the following table 2:

TABLE 2

Referring to fig. 2 and 3, the positive electrode layer 111 of the present invention is made of PU foam, which has an extremely thin thickness and a foamed pore structure, uniformly distributed cells, a thin structure thickness and a flexible characteristic. The following invention utilizes several ultra-thin nano-meter total 10 samples as shown in fig. 1 and contains different thickness of the positive electric layer 111 for the related performance test, wherein the distance between the positive electric layer 111 and the negative electric layer 131 is 0.5mm when they are not in contact.

First, the positive electrode layer 11 is contacted with the negative electrode layer 131 by applying different forces 1N-4N and measuring the voltage value generated by the same, and as a result, please refer to FIG. 4, which shows the relationship between the applied force and the voltage for the sample with the thickness of the positive electrode layer 111 of 5 μm and the pore size of 15 μm according to the present invention. As can be seen from fig. 4, the case of larger force has higher output voltage, and this embodiment is the best performance embodiment of all embodiments of the present invention.

Next, the relationship between the applied force and the voltage with respect to the sample having the positive electrode layer 111 with a thickness of 10 μm is shown in FIGS. 5A to 5B, and the relationship between the applied force and the current is shown in FIGS. 5C to 5D. It can be seen from fig. 5A-5B that the voltage increases substantially with increasing magnitude of the applied force between 1N and 8N, while the voltage output shows a slight decrease but still has a certain magnitude of voltage output with the applied force between 8N and 20N. The current behavior basically increases with increasing applied forces 1N-20N.

Please refer to fig. 6A and 6B, which show the relationship between the force, voltage and current applied by the sample with the thickness of the positive electrode layer 11 being 20 μm according to the present invention. In this embodiment, the voltage and current output between the applied forces 1N to 6N are stable, and basically increase with the increase of the applied force.

Please refer to fig. 7, which shows the relationship between the applied force and the voltage for the sample with the thickness of the positive electric layer 11 of 40 μm according to the present invention. Similarly, the voltage output between the applied forces 1N-4N in this embodiment is stable and increases as the applied force increases.

Please refer to fig. 8A and 8B, which are graphs showing the relationship between the applied force, the voltage and the current for the sample with the thickness of 90 μm of the positive electrode layer 11 according to the present invention. In this embodiment, the voltage and current output between the applied forces 1N to 6N are stable, and basically increase as the applied force increases.

The combination of the above samples of different thicknesses and the comparison of the current and voltage corresponding to the applied force is shown in fig. 9A, 9B, and 9C. As can be seen from the comparison results, the electrical output performance of the voltage and current between the samples with different thicknesses of the positive electric layer 11 provided by the present invention increases with the increase of the applied force, and the degree of the increase is relatively better with the thinner thickness, such as 5 μm or 10 μm, which proves that the present invention can indeed provide the ultra-thin nano power generation assembly 10 with a thin thickness, flexibility and good electrical output performance.

Further, several different embodiments are provided below for the thickness and the foam pore size of the PU foam of the positive electrode layer 11 and the performance thereof is confirmed.

Referring to fig. 10A, 10B and 10C, the PU foam material with the thickness of 5, 20 and 40 μm of the positive electrode layer 11 is in a surface and cross-sectional configuration, respectively. On the other hand, the 5 μm PU foam of fig. 11A and 11B has different electrical output performance corresponding to different porosity, please refer to table 3 below. Tests show that when the size of the foaming hole is reduced, the foaming hole has excellent electrical output performance. From the above, it can be seen that the ultra-thin nano-power generation assembly 10 provided by the present invention has a more significant electrical output performance when the thickness of the positive electrode layer 11 is smaller and the diameter of the foaming aperture is smaller.

TABLE 3

It should be understood that the above-mentioned embodiments are merely preferred examples of the present invention, and are not intended to limit the technical solutions of the present invention, and it will be obvious to those skilled in the art that the above-mentioned additions, substitutions, transformations and modifications can be made within the spirit and principle of the present invention, and all such additions, substitutions, transformations and modifications should be included in the technical solutions of the present invention.

Claims

1. An ultra-thin nano-electricity generating assembly, comprising:

a positive electricity composite layer, which comprises a positive electricity layer and a positive electricity layer electrode which are laminated, wherein the positive electricity layer is made of foaming materials, the thickness of the positive electricity layer is less than 90 mu m, and the diameter of a foaming hole is less than 60 mu m; and

a negative electricity composite layer is electrically connected with the positive electricity composite layer and comprises a negative electricity layer and a negative electricity layer electrode which are laminated.

2. The ultra-thin nano-power generation assembly of claim 1, wherein the positive electrical layer and the negative electrical layer are triboelectric materials having opposite electrical properties.

3. The ultra-thin nano-electricity generating assembly of claim 1 or 2, wherein the positive electrode layer comprises a polyurethane, magnesium fluoride, nylon, glass, cotton, or polyethylene terephthalate film.

4. The ultra-thin nano-power generation assembly of claim 1 or 2, wherein the negative electrode layer comprises urethane rubber, paper, wood, nitrile rubber, polycarbonate, acrylonitrile-butadiene-styrene copolymer, acryl, epoxy, styrene-butadiene rubber, polyethylene terephthalate fabric, ethylene-vinyl acetate copolymer, polystyrene, polyimide, silicone polymer, polyethylene, polypropylene, cellulose nitrate, polyvinyl chloride, or latex.

5. The ultra-thin nano-power generation assembly of claim 1 or 2, wherein the foam material comprises polyurethane.

6. The ultra-thin nano-power generation assembly of claim 1 or 2, wherein the negative electrode layer comprises polytetrafluoroethylene.

7. The ultra-thin nano-power generation assembly of claim 1 or 2, wherein the positive layer electrode is a copper electrode.

8. The ultra-thin nano-power generation assembly of claim 1 or 2, wherein the negative electrode is an aluminum electrode.

9. The ultra-thin nano-power generation assembly of claim 1 or 2, wherein the positive electrical layer generates an electrical output when in contact with the negative electrical layer.

10. Use of an ultra-thin nano-power generation assembly according to any of claims 1 to 9 in the manufacture of a drive small component or a sensor.