KR20190072086A - Triboelectric genarator including spring - Google Patents

Abstract

Disclosed is a triboelectric power generation element with increased energy efficiency generated per unit area. According to an embodiment of the present invention, the triboelectric power generation element comprises: one-dimensional fiber; and a spring on which a first triboelectrification layer is formed. The one-dimensional fiber is wound on the surface of the spring on which the first triboelectrification layer is formed. Triboelectricity is generated in compression and restoration processes of the spring by a difference in electro negativity between the first triboelectrification layer and the one-dimensional fiber.

Description

[0001] TRIBOELECTRIC GENARATOR INCLUDING SPRING [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a triboelectricity generating device including a spring, and more particularly, to a triboelectricity generating device including a spring, which is capable of facilitating energy harvesting using repeated mechanical pressure due to vibration of an elastic body, And more particularly to a triboelectric generating element including a spring capable of being maximized.

Most of the goods and devices that can be seen in the living environment or the industrial field use electricity as the power source, and the demand is increasing as the society is advanced. Therefore, facility investment for various power generation facilities such as thermal power generation using fossil energy, nuclear fusion using nuclear fusion and nuclear fission is continuously increasing, and recently,

Investment and development of various alternative power generation facilities such as photovoltaic power generation, wind power generation, and tidal power generation are being actively carried out.

However, the battery must be recharged when the power source is discharged due to limited use time, and can not be used when the battery is in motion or outdoors. In order to solve these problems, a variety of self-generating devices have been developed to enable the use of the necessary power in an emergency. In recent years, energy harvest has been used to recover energy that has been abandoned in everyday life Research on the system is actively proceeding.

As a kind of energy harvest technology, recently, a technology using a piezoelectric effect of a nanowire has been developed, which is a technique of converting pressure repeatedly transmitted into electrical energy, such as a human step, in which nanowires are deformed by pressure And collecting electricity generated in the process.

However, a system that harvests energy using the piezoelectric effect has a yield of several volts, tens of nA. On the other hand, when using the triboelectric effect having a relatively similar energy harvesting principle, it is possible to harvest a voltage and current of 10 ² to 10 ³ times higher than the piezoelectric effect, and generate power of several mW or more. Therefore, in addition to the technology using the piezoelectric effect, electricity generated by friction is very much generated in daily life. Therefore, in recent years, techniques for capturing electrons generated when two different objects are rubbed by a method of harvesting a small amount of electricity from movement around a human are being studied.

However, the technology of recovering triboelectricity and converting it into electrical energy is not very widely used because it is very basic or has very low efficiency. Particularly, a triboelectric generating device using a polydimethylsiloxane (PDMS) material has been developed as a material having high triboelectric generation efficiency, and a manufacturing method thereof such as forming a fine nano pattern on the surface of a polydimethylsiloxane There is a problem that a semiconductor process is required and a manufacturing process is complicated and difficult such as an expensive manufacturing equipment is required.

Korean Patent Publication No. 10-2015-0142810, "Fiber-based triboelectric nano generator element and power unit using the same"

Yahya Atwa et al., Silver nanowire coated threads for electrically conductive textiles, 2015

It is an object of embodiments of the present invention to manufacture a triboelectricity-generating device with improved energy efficiency per unit area using one-dimensional fibers and springs.

It is an object of the embodiments of the present invention to manufacture a triboelectric generating element which can effectively generate electric power from repeated mechanical pressures or various types of energy sources due to vibration of an elastic body using a spring having an elastic force.

It is an object of embodiments of the present invention to simply manufacture a triboelectric generating element using a simple process of winding one-dimensional fibers on a spring surface.

A triboelectric generator according to an embodiment of the present invention includes a one-dimensional fiber; And a spring having a surface on which a first triboelectrification layer is formed, wherein the one-dimensional fiber is wound on a surface of a spring on which the first triboelectrification layer is formed, and the first triboelectrification layer and the one- Thereby generating triboelectricity during compression and decompression of the spring.

Wherein the triboelectric generating element includes a first triboelectricity generated between the first triboelectric charge layer and the one-dimensional fibers disposed on a surface of the first triboelectric charge layer, and a second triboelectric charge generated between the first triboelectric charge layer and the first triboelectric charge layer The second triboelectricity generated between the one-dimensional fibers disposed spaced apart from one another.

The upper portion of the spring or the one-dimensional fiber may include a nanopattern formed by an etching process or a solution process.

The shape of the nanopattern may be selected from the group consisting of nanowires, nanodots, nanoflake, nanoframes, nanowalls, nanotubes, nanorods, nano- A nanohorn, and a nano-sphere.

Nanoparticles may be further formed on the surface of the nanopattern.

The first triboelectric charge layer may be a polymer layer, a conductive layer, an oxide layer, or a combination thereof.

The polymer layer may be formed of a material selected from the group consisting of polyethylene terephthalate (PET), polyester (PE), polytetrafluoroethylene (PTFE), polydimethylsiloxane (PDMS), Kapton, Polyimide, polyimide, nylon, polyvinylalcohol (PVA), polyisobutylene, polyurethane elastic sponge, polyvinyl butyral, polychloroprene, natural rubber, poly But are not limited to, polyacrylonitrile, polydiphenolcarbonate, polyetherchloride, polyvinylidene chloride, polystylene, polyethylene, polypropylene (PP), and poly And may include at least one of polyvinyl chloride (PVC).

The conductive layer may be formed of one selected from the group consisting of aluminum (Al), stainless steel (SUS), nickel (Ni), copper (Cu), silver (Ag), chromium (Cr), titanium (Ti) And may include at least one.

The oxide layer may include at least one of zinc oxide (ZnO), titanium oxide (TiO ₂ ), aluminum oxide (Al ₂ O ₃ ), and silicon oxide (SiO ₂ ).

The spring may comprise at least one of carbon steel, low-alloy steel and spring steel.

According to another aspect of the present invention, there is provided a triboelectric generator including: a spring; And one-dimensional fibers having a surface on which a second triboelectrification layer is formed, wherein one-dimensional fibers having the second triboelectric charging layer formed thereon are wound on a surface of the spring, and the electronegativity of the spring and the second triboelectrification layer The difference creates triboelectricity during compression and recovery of the spring.

Wherein the triboelectric generating element comprises a first triboelectricity generated between the spring and the second tribocharge layer disposed on the surface of the spring and a second triboelectricity generated between the spring and the second triboelectric charge layer disposed spaced apart from the spring A second triboelectricity can be generated.

The second triboelectric charging layer may be a polymer layer, a conductive layer, an oxide layer or a combination thereof.

According to another aspect of the present invention, there is provided a triboelectricity generating device including: a spring having a first triboelectrification layer formed on a surface thereof; And one-dimensional fibers having a surface on which a second triboelectrification layer is formed, wherein one-dimensional fibers having the second triboelectrification layer formed on the surface of the spring on which the first triboelectrification layer is formed are wound, And the second triboelectrification layer generates triboelectricity during the compression and decompression of the spring by the difference in electronegativity.

Wherein the triboelectric generating element includes a first triboelectricity generated between the first tribocharge layer and the second triboelectric charge layer disposed on the surface of the first triboelectric charge layer and a second triboelectric charge generated between the first triboelectric charge layer and the first triboelectric charge layer And a second triboelectricity generated between the second tribocharge layers disposed apart from the charge layer.

According to the embodiment of the present invention, it is possible to manufacture a triboelectricity generating element with improved energy efficiency per unit area using one-dimensional fibers and springs.

According to the embodiment of the present invention, it is possible to manufacture a triboelectricity generating device capable of effectively producing electric power from repeated mechanical pressures or various types of energy sources due to vibration of an elastic body by using a spring having elasticity.

According to the embodiment of the present invention, a triboelectric generating element can be simply manufactured by using a simple process of winding one-dimensional fibers on the surface of a spring.

FIG. 1A is a cross-sectional view illustrating a triboelectric generator according to an embodiment of the present invention. FIG.
1B is a cross-sectional view illustrating a triboelectricity generating device according to another embodiment of the present invention.
1C is a cross-sectional view illustrating a triboelectric generating element according to another embodiment of the present invention.
2A is a cross-sectional view illustrating a triboelectric generating element according to an embodiment of the present invention including a polymer layer, a conductive layer, and an oxide layer as a first triboelectrification layer.
FIG. 2B is a cross-sectional view illustrating a triboelectric generator according to another embodiment of the present invention, which includes both a polymer layer, a conductive layer, and an oxide layer as a second tribocharge layer.
FIGS. 3A through 3C are cross-sectional views of a triboelectric generator according to an embodiment of the present invention.
4 is a perspective view showing a friction generator including a triboelectric generator according to an embodiment of the present invention.
5A to 5D are three-dimensional views illustrating a method of manufacturing a triboelectric generating element according to an embodiment of the present invention.
6A to 6D show electron scanning microscope (SEM) images showing one-dimensional fibers having nanopatterns formed on their surfaces.
7A and 7B are actual images showing a triboelectric generating element according to embodiments of the present invention.
Figures 8a and 8b illustrate a pushing tester for verifying the utility of a triboelectricity device in accordance with embodiments of the present invention.
FIG. 9A is a graph showing an output voltage of the compression and recovery process of the triboelectricity generation device according to the embodiments of the present invention, and FIG. 9B is a graph showing the output voltage of the triboelectricity generation device according to the present invention, And the output current of the restoration process.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and accompanying drawings, but the present invention is not limited to or limited by the embodiments.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that the terms "comprises" and / or "comprising" used in the specification are intended to be inclusive in a manner similar to the components, steps, operations, and / Or additions.

As used herein, the terms "embodiment," "example," "side," "example," and the like should be construed as advantageous or advantageous over any other aspect or design It does not.

Also, the term 'or' implies an inclusive or 'inclusive' rather than an exclusive or 'exclusive'. That is, unless expressly stated otherwise or clear from the context, the expression 'x uses a or b' means any of the natural inclusive permutations.

Also, the phrase "a" or "an ", as used in the specification and claims, unless the context clearly dictates otherwise, or to the singular form, .

The terms used in the following description are chosen to be generic and universal in the art to which they are related, but other terms may exist depending on the development and / or change in technology, customs, preferences of the technician, and the like. Accordingly, the terminology used in the following description should not be construed as limiting the technical thought, but should be understood in the exemplary language used to describe the embodiments.

Also, in certain cases, there may be a term chosen arbitrarily by the applicant, in which case the detailed description of the meaning will be given in the corresponding description section. Therefore, the term used in the following description should be understood based on the meaning of the term, not the name of a simple term, and the contents throughout the specification.

On the other hand, the terms first, second, etc. may be used to describe various elements, but the elements are not limited by terms. Terms are used only for the purpose of distinguishing one component from another.

It will also be understood that when an element such as a film, layer, region, configuration request, etc. is referred to as being "on" or "on" another element, And the like are included.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The terminology used herein is a term used for appropriately expressing an embodiment of the present invention, which may vary depending on the user, the intent of the operator, or the practice of the field to which the present invention belongs. Therefore, the definitions of these terms should be based on the contents throughout this specification.

Hereinafter, a triboelectric generator according to an embodiment of the present invention will be described with reference to FIG. 1A.

FIG. 1A is a cross-sectional view illustrating a triboelectric generator according to an embodiment of the present invention. FIG.

The triboelectric generating element according to an embodiment of the present invention includes a spring 110 having a one-dimensional fiber 120 and a first triboelectrifying layer 111 formed on a surface thereof, and a first triboelectric charging layer 111 is formed The one-dimensional fiber 120 is wound on the surface of the spring 110.

In addition, the triboelectric generating element according to an embodiment of the present invention generates triboelectricity in the compression and decompression process of the spring by the difference in electronegativity of the first triboelectric charge layer 111 and the one-dimensional fiber 120.

The first triboelectrification layer 111 and the one-dimensional fiber 120 may be formed of a material having a different electronegativity and the position of the material constituting the first triboelectric layer 111 on the triboelectric series Dimensional fiber 120 may be located closer to a negative value or closer to a positive value than the position of the material that constitutes the one-dimensional fiber 120. [

Therefore, when the spring 110 is compressed and restored, the first triboelectrification layer 111 and the one-dimensional fiber 120 are arranged such that any one of the first triboelectric charge layer 111 and the one- +), And the other one can be charged to negative charge (-), and the nature of the charge induced according to the position of the triboelectric series of the material constituting the first triboelectric charge layer 111 and the one-dimensional fiber 120 and The amount can vary.

Since the one-dimensional fiber 120 or the first triboelectric charging layer 111 has a large electrification charge and a higher dielectric constant, the higher the triboelectricity is, the higher the triboelectricity of the one-dimensional fiber 120 or the first triboelectric charging layer 111), or by applying materials away from the triboelectric series.

Further, when the one-dimensional fiber 120 or the first triboelectrifying layer 111 is made of a material far away from the triboelectric series, the open-circuit voltage can be improved.

Using the one-dimensional fiber 120, the first triboelectrification layer 111 can be made of a material having a relatively high elastic modulus such that the first triboelectric layer 111 formed on the surface of the spring 110 is polydimethylsiloxane (PDMS) The ability to obtain electrons with a negative charge is relatively strong, and the spring 110 is relatively positively charged, so that the ability to obtain electrons becomes relatively weak.

Therefore, since the one-dimensional fiber 120 and the first triboelectrification layer 111 differ in the order of enumeration in the triboelectric series, a difference appears in their ability to obtain electrons, so that the one-dimensional fiber 120 and the first When the triboelectric charge layer 111 is rubbed by the compression and recovery process of the spring 110, the equilibrium of the surface charges of the one-dimensional fiber 120 and the first triboelectric charge layer 111 is destroyed so that electrons move from the equipotential to the electrode So that triboelectricity can be generated.

The triboelectric element according to one embodiment of the present invention includes a first triboelectric element E1 generated between the first triboelectric element layer 111 and the one dimensional fiber 120 disposed on the surface of the first triboelectric element layer 111 And the second triboelectric element E2 generated between the first triboelectrification layer 111 and the one-dimensional fiber 120 disposed apart from the first triboelectric element layer 111 can be generated.

Accordingly, the triboelectric generating element according to an embodiment of the present invention can be manufactured by winding the one-dimensional fiber 120 on the spring 110 formed with the first triboelectric charging layer 111, The second frictional electricity E2 can be generated to improve the output performance of the triboelectric generating element.

The triboelectric generating device according to an embodiment of the present invention may be fabricated in a two-dimensional shape using a top-down process or a bottom-up process on a spring 110 or a one- A nanodots such as a nanodots or a nanodire may be formed to improve the diversity of the structure.

Accordingly, the triboelectric element according to an embodiment of the present invention has a multi-dimensional structure on its surface, thereby maximizing the surface area and maximizing the amount of energy harvested as the surface area is maximized.

As the etching process, reactive ion etching (RIE) or ion milling may be used, but not limited thereto, any etching technique capable of increasing the surface area can be used.

A growth method may be used for the solution process and a growth method may be applied to the surface of the spring 110 or the one-dimensional fiber 120 using a physical / chemical deposition or solution coating (dip coating, etc.) After forming a seeding layer, nanopatterns can be synthesized by harvesting energy through a hydrothermal process on the seed layer.

In addition, the triboelectricity device according to one embodiment of the present invention improves the crystallinity and adhesion of the spring 110 or the one-dimensional fiber 120 to improve the physical characteristics The heat treatment process can be further performed.

The shape of the nanopattern may be selected from the group consisting of nanowires, nano dots, nanoflake, nanoframes, nanowalls, nanotubes, nanorods, a nanohorn, and a nano-sphere.

The triboelectric generating element according to an embodiment of the present invention forms a nanopattern on the surface of the spring 110 or the one-dimensional fiber 120 to increase the friction area of the triboelectric generating element, have.

Nanoparticles can be further formed on the surface of the nanopattern, and the surface area can be further increased by the nanoparticles formed on the surface of the nanopattern.

The nanoparticles may include any one selected from TiO ₂ and ZnO, and the nanoparticles may be formed by a drop casting method.

The first triboelectric charge layer 111 may be a polymer layer, a conductive layer, an oxide layer, or a combination thereof.

A technique of using both the polymer layer, the conductive layer, and the oxide layer as the first triboelectric charging layer 111 will be described with reference to FIG. 2A.

The polymer layer may be formed of a material selected from the group consisting of polyethyleneterephthalate (PET), polyester (PE), polytetrafluoroethylene (PTFE), polydimethylsiloxane (PDMS), Kapton, polyimide (PI) Polyimide, polyimide, nylon, polyvinylalcohol (PVA), polyisobutylene, polyurethane elastic sponge, polyvinyl butyral, polychloroprene, natural rubber, Polyacrylonitrile, polydiphenolcarbonate, polyetherchloride, polyvinylidene chloride, polystylene, polyethylene, polypropylene (PP), and polychlorinated And may include at least one of polyvinyl chloride (PVC).

Preferably, the first triboelectric layer 111 may be polydimethylsiloxane (PDMS), and polydimethylsiloxane (PDMS) may be used as a material having a negative charge, but the present invention is not limited thereto.

The conductive layer may be at least one of aluminum (Al), stainless steel (SUS), nickel (Ni), copper (Cu), silver (Ag), chromium (Cr), titanium (Ti) One can be included.

Preferably, aluminum may be used as the conductive layer, and aluminum may be used as a material having a positive charge, but is not limited thereto.

The oxide layer may include at least one of zinc oxide (ZnO), titanium oxide (TiO ₂ ), aluminum oxide (Al ₂ O ₃ ), and silicon oxide (SiO ₂ ).

Preferably, a zinc oxide may be used as the oxide layer, and the zinc oxide may be used as a material having a positive charge, but is not limited thereto.

The spring 110 may include at least one of carbon steel, low-alloy steel, and spring steel.

The one-dimensional fiber 120 may be any of a variety of materials including, but not limited to, natural fibers such as cotton fibers, fibrils, asbestos or cotton, regenerated fibers such as rayon or acetate, synthetic fibers such as nylon, polyester, acrylic or polypropylene, But the present invention is not limited thereto.

Further, the one-dimensional fiber 120 may include fibers that can be obtained by twisting or arranging a plurality of long fibers or short fibers in a staple, a filament or a plurality of long fibers.

The surface of the one-dimensional fiber 120 may be coated with a metal wire or a conductive material.

As a material of a piezoelectric element used in the past, a PVDF, a one-dimensional nano structure of a polymer material, or a zinc oxide in the form of a two-dimensional thin film are typical examples of ferroelectric materials, and a material that can be used as a piezoelectric material is very limited. However, the triboelectric device according to an embodiment of the present invention uses two charge materials. As the charge material, various materials such as a polymer material, a conductive material, and an oxide can be used to improve the variety of materials.

In addition, conventionally used spring type piezoelectric devices have a limited process and a method of harvesting energy because the structure and the piezoelectric material must be integrated. However, the triboelectric generation device according to one embodiment of the present invention can be formed by winding a flexible one-dimensional fiber 120 on the surface of the spring 110, It is possible to improve the utilization.

The triboelectric device according to an embodiment of the present invention can be used as a main / auxiliary power source of a smart electronic device by using a spring 110 having various sizes and shapes, The output efficiency of the device can be increased and the use time can be increased.

The triboelectric generating device according to an embodiment of the present invention can be manufactured by only a solution process such as dip coating and hydrothermal process, thereby simplifying the manufacturing process and manufacturing cost.

The triboelectric generating element according to an embodiment of the present invention can be manufactured by winding a one-dimensional fiber on a surface of a spring 110, thereby obtaining a triboelectric effect by using a triboelectric effect equivalent to tens or hundreds of times of electric energy generated by a piezoelectric effect. It is possible to maximize the amount of generated energy per unit area / unit pressure.

1B is a cross-sectional view illustrating a triboelectricity generating device according to another embodiment of the present invention.

1B, the same elements as those in FIG. 1A are included, except for the point that the position of the triboelectrification layer (the second triboelectric charging layer) 121 is different.

The triboelectric generator according to another embodiment of the present invention includes a spring 110 and a one-dimensional fiber 120 having a second triboelectrification layer formed on its surface, and a second triboelectric charge layer The one-dimensional fiber 120 formed with the first and second triboelectric charging layers 121 and 121 is wound up and triboelectricity is generated in the process of compression and recovery of the spring 110 by the difference in electronegativity of the spring 110 and the second triboelectric charge layer 121.

The position of the material constituting the second triboelectrification layer 121 on the triboelectric series may be determined by the spring 110 and the second triboelectric charge layer 121, May be located closer to a negative value or closer to a more positive value than the location of the material constituting the cell 110.

Therefore, when the spring 110 is compressed and restored, either of the spring 110 and the second triboelectric charging layer 121 is electrically charged with positive electric charge (+), And the other one can be charged with a negative charge (-), and the nature and amount of the charge induced according to the position of the triboelectric series of the material constituting the spring 110 and the second triboelectric charge layer 121 can be changed.

In addition, by using the material that is far away from the triboelectric series as the spring 110 and the second triboelectric charge layer 121, the open-circuit voltage can be improved.

The second triboelectrification layer 121 is relatively in contact with the surface of the one-dimensional fiber 120 by using polydimethylsiloxane (PDMS) as the second triboelectric layer 121 formed on the surface of the one- The ability to obtain electrons with a negative charge is relatively strong, and the spring 110 is relatively positively charged, so that the ability to obtain electrons becomes relatively weak.

Therefore, since the spring 110 and the second triboelectrification layer 121 differ in the order of arrangement in the triboelectric series, a difference appears in their ability to obtain electrons, so that the spring 110 and the second triboelectric charging layer 121 are rubbed by the compressing and restoring process of the spring 110, the equilibrium of the surface charges of the spring 110 and the second tribo charging layer 121 is broken so that the electrons move from the equipotential to the electrode, can do.

A triboelectric generator according to another embodiment of the present invention includes a first triboelectric generator E1 generated between a spring 110 and a second triboelectric charge layer 121 disposed on the surface of a spring 110, And a second frictional electrification layer 121 disposed spaced apart from the spring 110. The second frictional electrification layer 121 may be formed of a second frictional electrification layer 121,

Accordingly, the triboelectric generating element according to another embodiment of the present invention can be manufactured by winding the one-dimensional fiber 120 formed with the second triboelectric charging layer 121 on the spring 110, The second frictional electricity E2 can be generated to improve the output performance of the triboelectric generating element.

The second triboelectric charge layer 121 may be a polymer layer, a conductive layer, an oxide layer, or a combination thereof.

A technique of using both the polymer layer, the conductive layer, and the oxide layer as the second triboelectric charging layer 121 will be described with reference to FIG. 2A.

1C is a cross-sectional view illustrating a triboelectric generating element according to another embodiment of the present invention.

1C includes the same components as those in Figs. 1A and 1B except that the positions where the triboelectrification layers (the first and second triboelectrification layers 111 and 121) are formed are different, Elements are omitted.

The triboelectric generation device according to another embodiment of the present invention includes a spring 110 having a first triboelectrification layer 111 formed on a surface thereof and a one-dimensional fiber 120 having a second triboelectric charge layer formed on a surface thereof, The one-dimensional fiber 120 on which the second triboelectric charging layer 121 is formed is wound on the surface of the spring 110 on which the first triboelectric charging layer 111 is formed and the first triboelectric charging layer 111 and the second triboelectric charging The layer 121 generates triboelectricity in the compression and decompression of the spring 110 by the electronegativity difference.

The first triboelectric charging layer 111 and the second triboelectrifying layer 121 may be formed of a material having a different electronegativity from that of the material constituting the first triboelectric charging layer 111 on the triboelectric series, May be located closer to a negative value than the position of the material constituting the second tribo charging layer 121, or may be located closer to a more positive value.

The first triboelectric charging layer 111 and the second triboelectrifying layer 121 are arranged so that when the spring 110 is compressed and restored, either the first triboelectrifying layer 111 or the second triboelectrifying layer 121 One of which is positively charged and the other of which is negatively charged and which is induced in accordance with the position of the triboelectric series of the material constituting the spring 110 and the second tribocharge layer 121 The nature and amount thereof may vary.

Further, by using the material that is far away from the triboelectric series as the first triboelectric charging layer 111 and the second triboelectric charging layer 121, the open voltage can be improved.

The second triboelectrification layer 121 formed on the surface of the one-dimensional fiber 120 may be formed of a zinc oxide or a tin oxide (TiO2) or the like, using a polydimethylsiloxane (PDMS) When aluminum is used, the first triboelectrification layer 111 is relatively negatively charged to have a relatively strong ability to obtain electrons, and the second triboelectric charge layer 121 is relatively positively charged, so that the ability to obtain electrons is relatively weak .

Therefore, since the first triboelectric charging layer 111 and the second triboelectrifying layer 121 differ in the order of enumeration in the triboelectric series, a difference appears in the ability of the first triboelectrifying layer 111 and the second triboelectrifying layer 121 to obtain electrons, And the second frictional charging layer 121 are rubbed by the compression and recovery process of the spring 110, the equilibrium of the surface charges of the first and second frictional charging layers 111 and 121 is destroyed, Can move from the equipotential to the electrode and generate triboelectricity.

The triboelectric generator according to another embodiment of the present invention includes a first triboelectric charging layer 111 and a first triboelectric charging layer 121 disposed on the surface of the first triboelectric charging layer 111, It is possible to generate a second triboelectricity E2 that is generated between the triboelectricity E1 and the first triboelectric charge layer 111 and the second triboelectric charge layer 121 disposed spaced apart from the first triboelectric charge layer 111 have.

Accordingly, in the triboelectric generator according to another embodiment of the present invention, the one-dimensional fiber 120 having the second triboelectric charging layer 121 formed thereon is wound on the spring 110 having the first triboelectric charging layer 111 formed thereon The first triboelectric element E1 and the second triboelectric element E2 can be generated to improve the output performance of the triboelectric element.

2A is a cross-sectional view illustrating a triboelectric generating element according to an embodiment of the present invention including a polymer layer, a conductive layer, and an oxide layer as a first triboelectrification layer.

FIG. 2A is identical to FIG. 1A except that the first triboelectric charging layer includes both a polymer layer, a conductive layer, and an oxide layer, and thus description of the same components will be omitted.

A triboelectricity device according to one embodiment of the present invention that includes both a polymer layer, a conductive layer, and an oxide layer as a first triboelectrification layer includes a first layer comprising a polymer layer, a conductive layer, and an oxide layer on a surface of a spring 110 And a nano pattern 112 may be formed on the surface of the spring 110. [

Further, the triboelectric generator according to an embodiment of the present invention, which includes both the polymer layer, the conductive layer, and the oxide layer as the first triboelectric charge layer, includes a first triboelectrification layer (not shown) including a polymer layer, The one-dimensional fibers are wound around the spring 110 having the teeth 111 formed thereon.

FIG. 2B is a cross-sectional view illustrating a triboelectric generator according to another embodiment of the present invention, which includes both a polymer layer, a conductive layer, and an oxide layer as a second tribocharge layer.

FIG. 2B is the same as FIG. 1B except that the second triboelectric charging layer includes both the polymer layer, the conductive layer, and the oxide layer, and thus description of the same components will be omitted.

A triboelectricity device according to another embodiment of the present invention that includes both a polymer layer, a conductive layer, and an oxide layer as a second tribocharge layer includes a polymer layer, a conductive layer, and an oxide layer on the surface of the one- And a nano pattern 122 may be formed on the surface of the one-dimensional fiber 120. The nano patterns 122 may be formed on the surface of the one-

Further, the triboelectric generating element according to another embodiment of the present invention, which includes both the polymer layer, the conductive layer and the oxide layer as the second triboelectric charge layer, includes a second triboelectric charge including a polymer layer, a conductive layer, The one-dimensional fiber 120 on which the layer 121 is formed is wound.

FIGS. 3A through 3C are cross-sectional views of a triboelectric generator according to an embodiment of the present invention.

The structure of the triboelectricity generating device according to one embodiment of the present invention shown in FIGS. 3A to 3C is the same as that of FIG. 1A, so that the description of the same components will be omitted.

FIG. 3B is an image showing a state where the spring 110 of the triboelectric generating element according to the embodiment of the present invention is compressed, FIG. 3C is a view showing the spring 110 of the triboelectric generating element according to the embodiment of the present invention, Is an image showing the restored state.

When the spring 110 of the triboelectric generator according to the embodiment of the present invention compresses the compression, the first triboelectrification layer 111 and the one-dimensional fiber 120 formed on the spring surface are brought into contact with each other, When the spring 110 of the triboelectric generator according to an embodiment of the present invention is restored, the first triboelectric layer 111 and the one-dimensional fiber 120 which are in contact with each other are separated.

Therefore, in the triboelectric generating element according to the embodiment of the present invention, the equilibrium of the surface charges of the first triboelectrification layer 111 and the one-dimensional fiber 120 is broken by the compression and decompression process of the spring 110, Can move from the equipotential to the electrode and generate triboelectricity.

4 is a perspective view showing a friction generator including a triboelectric generator according to an embodiment of the present invention.

FIG. 4 illustrates a friction generator including a triboelectric generator according to an embodiment of the present invention. However, the present invention is not limited to this, and a triboelectric generator according to another embodiment of the present invention, And may include a triboelectric generator according to an embodiment.

The frictional power generation apparatus includes a triboelectric generating element formed between the first electrode 200 and the second electrode 500 according to an embodiment of the present invention.

The first electrode 200 and the second electrode 500 serve to move the generated triboelectricity, that is, electrons, by a redox reaction.

The first electrode 200 and the second electrode 500 are divided into an anode or a cathode according to the induced charges, and electrons move due to the redox reaction between them.

The first electrode 200 and the second electrode 500 are not particularly limited as far as they are substances that can easily transfer electrons by oxidation-reduction reaction. The composition for an organic electrode includes a conductive polymer having excellent electrical conductivity and at least five aromatic rings Organic monomolecular compounds, metals, and metal oxides.

Examples of the metal include gold (Au), silver (Ag), platinum (Pt), aluminum (Al), nickel (Ni), copper (Cu), titanium (Ti), chromium (Cr), selenium Or the like.

ITO (indium tin oxide) may be used as the metal oxide.

Examples of the conductive polymer include poly (3-hexylthiophene), P3HT, poly (3,4-ethylenedioxythiophene), PEDOT, poly Poly (3,4-propylenedioxythiophene), poly (3,4-ethylenedioxythiophene): poly (ethylene glycol-propylene glycol block copolymer) (poly (3,4 (3-ethylenedioxythiophene): poly (ethylene glycol) -block-poly (propylene glycol), PEDOT: and may include at least one of poly (styrene sulfonate), PEDOT: PSS, polypyrrole, polyaniline, polythiophene, and polyselenophene.

In addition, nano, micron, or sub-micron level microstructures are distributed on all or a part of the upper surface of the first electrode 200 and the second electrode 500 and / or the lower surface of the friction layer. And the microstructure can be at least one of a structure of nanowires, nanotubes, nanoparticles, nano-rods, nanoflowers, nano grooves, micron grooves, nano horns, micron horns, nanospheres and micron spheres , And the nanostructure may be an array or a decorative or coated layer of a nanomaterial.

Accordingly, the frictional electricity generating device is configured such that static electricity is induced according to the position of the triboelectric series of the triboelectric generator according to the embodiments of the present invention, and the induced static electricity is polarized by the first electrode 200 and the second electrode 500 So that triboelectricity can be generated.

5A to 5D are three-dimensional views illustrating a method of manufacturing a triboelectric generating element according to an embodiment of the present invention.

5A is a three-dimensional view showing a spring.

The spring 110 may be a spring wire having an elastic force and the spring 110 may include at least one of carbon steel, low-alloy steel, and spring steel. can do.

5B is a stereoscopic view in which the first triboelectrification layer is coated on the spring surface.

The first triboelectrifying layer 111 is coated on the surface of the spring wire 110.

The first triboelectric charge layer 111 may be formed by a method such as dip coating, drop-casting, spin-coating, bar coating, spray coating, spin coating, a coating method, a brush coating method, a dip coating method, and a gravure coating method.

Preferably, the first triboelectrifying layer 111 may be formed by dip coating, and the dip coating may be performed by dipping the spring wire 110 in the solution for forming the first triboelectrification layer 111 for a predetermined time, And the first triboelectrifying layer 111 is coated on the surface of the wire 110.

The first triboelectric charge layer 111 may be a polymer layer, a conductive layer, an oxide layer, or a combination thereof.

5C is a three-dimensional diagram in which a primary fiber (1D yarn) is wound around a spring coated with the first triboelectrification layer.

The primary fibers 120 are spirally wound on the surface of the spring wire coated with the first triboelectrification layer.

The one-dimensional fiber 120 may be any of a variety of materials including, but not limited to, natural fibers such as cotton fibers, fibrils, asbestos or cotton, regenerated fibers such as rayon or acetate, synthetic fibers such as nylon, polyester, acrylic or polypropylene, But the present invention is not limited thereto.

Further, the one-dimensional fiber 120 may include fibers that can be obtained by twisting or arranging a plurality of long fibers or short fibers in a staple, a filament or a plurality of long fibers.

The surface of the one-dimensional fiber 120 may be coated with a metal wire or a conductive material.

5D is a three-dimensional view showing a coil spring in which the primary fibers 1D Yarn are wound.

The spring wire wound with the primary fibers (1D Yarn) is wound around the rotary shaft of the rod-shaped shaft, and the spring wire wound with the primary fibers (1D Yarn) is separated from the rotary shaft of the rod- The coil-like spring can be manufactured.

The outer diameter of the coil-shaped spring is determined according to the diameter of the rotating shaft of the rod-shaped member, and can be variously adjusted according to the application of the triboelectric generator according to an embodiment of the present invention.

6A to 6D show electron scanning microscope (SEM) images showing one-dimensional fibers having nanopatterns formed on their surfaces.

Referring to FIGS. 6A to 6D, two-dimensional nanowires and nanowalls are uniformly grown on the surface of the one-dimensional fiber by the hydrothermal synthesis method.

7A and 7B are actual images showing a triboelectric generating element according to embodiments of the present invention.

Referring to FIGS. 7A and 7B, it can be seen that the one-dimensional fiber is wound on the surface of the spring of the triboelectric generator according to the embodiments of the present invention.

Figures 8a and 8b illustrate a pushing tester for verifying the utility of a triboelectricity device in accordance with embodiments of the present invention.

8A and 8B show that the triboelectric generating element according to the embodiments of the present invention is extruded and restored by a pushing tester.

FIG. 9A is a graph showing an output voltage of the compression and recovery process of the triboelectricity generation device according to the embodiments of the present invention, and FIG. 9B is a graph showing the output voltage of the triboelectricity generation device according to the present invention, And the output current of the restoration process.

9A and 9B show that the output voltage and the output current vary according to the compression and decompression process of the triboelectric generating element according to the embodiments of the present invention. As a result, the triboelectric generating element according to the embodiments of the present invention effectively ≪ / RTI >

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of specific examples for the purpose of understanding and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

E1: 1st triboelectricity E2: 2nd triboelectricity
110: spring 111: first tribocharge layer
120: one-dimensional fiber 121: second frictional charging layer
100: triboelectric element 200: first electrode
500: Second electrode

Claims (15)

One dimensional fiber; And
A spring having a first triboelectric charging layer formed on its surface;
/ RTI >
Wherein the one-dimensional fiber is wound on the surface of the spring on which the first triboelectrification layer is formed, and triboelectricity is generated in the compression and restoration of the spring by the difference in electronegativity of the first triboelectrification layer and the one- Wherein the triboelectric element is a triboelectric element.
The method according to claim 1,
The triboelectric generating element includes:
A first triboelectric charge generated between the first triboelectric charge layer and the one-dimensional fiber disposed on a surface of the first triboelectric charge layer, and a second triboelectric charge generated between the first triboelectric charge layer and the first triboelectric charge layer, Dimensionally spaced apart from each other to produce a second triboelectricity generated between the two-dimensional fibers.
The method according to claim 1,
Wherein the nanopattern is formed by an etching process or a solution process on the spring or the one-dimensional fiber.
The method of claim 3,
The shape of the nanopattern may be selected from the group consisting of nanowires, nanodots, nanoflake, nanoframes, nanowalls, nanotubes, nanorods, nano- And at least one of a nanohorn and a nano-sphere.
The method of claim 3,
Wherein nanoparticles are further formed on the surface of the nanopattern.
The method according to claim 1,
Wherein the first triboelectric charge layer is a polymer layer, a conductive layer, an oxide layer, or a combination thereof.

The method according to claim 6,
The polymer layer may be formed of a material selected from the group consisting of polyethylene terephthalate (PET), polyester (PE), polytetrafluoroethylene (PTFE), polydimethylsiloxane (PDMS), Kapton, Polyimide, polyimide, nylon, polyvinylalcohol (PVA), polyisobutylene, polyurethane elastic sponge, polyvinyl butyral, polychloroprene, natural rubber, poly But are not limited to, polyacrylonitrile, polydiphenolcarbonate, polyetherchloride, polyvinylidene chloride, polystylene, polyethylene, polypropylene (PP), and poly And at least one of polyvinyl chloride (PVC).
The method according to claim 6,
The conductive layer may be formed of one selected from the group consisting of aluminum (Al), stainless steel (SUS), nickel (Ni), copper (Cu), silver (Ag), chromium (Cr), titanium (Ti) Wherein the at least one triboelectric element comprises at least one triboelectric element.
The method according to claim 6,
Wherein the oxide layer comprises at least one of zinc oxide (ZnO), titanium oxide (TiO ₂ ), aluminum oxide (Al ₂ O ₃ ), and silicon oxide (SiO ₂ ).
The method according to claim 1,
Wherein the spring comprises at least one of carbon steel, low-alloy steel, and spring steel.
spring; And
One-dimensional fiber having a second triboelectric charging layer formed on its surface
Lt; / RTI >
Dimensional fiber having the second triboelectrification layer formed on the surface of the spring is wound up and triboelectricity is generated in the process of compression and restoration of the spring by the difference in electronegativity of the spring and the second triboelectric charge layer Characterized in that the triboelectric generating element
12. The method of claim 11,
The triboelectric generating element includes:
A first triboelectricity generated between the spring and the second tribocharge layer disposed on the surface of the spring and a second triboelectricity generated between the spring and the second triboelectric charge layer disposed spaced apart from the spring Wherein the triboelectric element is a triboelectric element.
12. The method of claim 11,
Wherein the second triboelectric charging layer is a polymer layer, a conductive layer, an oxide layer, or a combination thereof.
A spring having a first triboelectric charging layer formed on its surface; And
One-dimensional fiber having a second triboelectric charging layer formed on its surface
Lt; / RTI >
Dimensional fibers having the second triboelectrification layer formed thereon are wound on the surface of the spring on which the first triboelectrification layer is formed, and the first triboelectrification layer and the second triboelectric charge layer are wound on the surface of the spring And generates triboelectricity in the compression and restoration process.
15. The method of claim 14,
The triboelectric generating element includes:
A first triboelectric charge generated between the first triboelectrification layer and the second tribocharge layer disposed on the surface of the first triboelectric charge layer and a second triboelectric charge generated between the first triboelectric charge layer and the first triboelectric charge layer And generates a second triboelectricity generated between the second tribocharge layers.

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