KR20200034145A - Triboelectric generator using external magnetic field - Google Patents

Abstract

The present invention relates to a triboelectric power generation element using an external magnetic field. According to the present invention, provided is an element capable of generating triboelectric power in response to a change in the external magnetic field even when there is no external mechanical kinetic energy or vibration. According to an embodiment of the present invention, the triboelectric power generation element using an external magnetic field comprises a first electrode, a first material layer, a second material layer, and a second electrode.

Description

Triboelectric power generation device using external magnetic field {TRIBOELECTRIC GENERATOR USING EXTERNAL MAGNETIC FIELD}

The present invention relates to a triboelectric power generation device using an external magnetic field, and according to the present invention, to a device capable of generating triboelectric power in response to an external magnetic field even when there is no external mechanical kinetic energy or vibration.

Existing triboelectric power generation elements have the principle of generating the triboelectric power generation voltage and current while the two materials contact and separate only when there is mechanical kinetic energy by external force. That is, in an environment without mechanical kinetic energy, there is a limitation that the triboelectric power generation element cannot be driven.

If a material in which the potential energy is changed in response to a magnetic field is used, even in an environment in which there is no mechanical kinetic energy due to an external force, the generation of electric power may be generated by driving the triboelectric power generating element using the change in the magnetic field.

A magnetic field-based triboelectric power generator can be driven by using the magnetic field generated in everyday life without applying an external magnetic field. In places where alternating current flows, such as power transmission lines (air lines, underground lines, underwater lines, etc.), electric wires, and household appliances, which are essential for our daily lives, changes in the magnetic field are always possible regardless of environmental changes such as weather, temperature, season, time, etc. exist. Therefore, if materials that react to changes in the magnetic field that are discarded in everyday life are used, it is expected that power generation of triboelectric power plants can be generated anytime, anywhere.

The present invention is to develop a material that changes the potential energy in response to a magnetic field and utilizes it as a friction material, thereby providing a triboelectric power generation device system that is self-driven by a magnetic field generated in the surrounding environment.

A triboelectric power generating element using an external magnetic field according to an embodiment of the present invention includes: a first electrode; A first material layer made of a material disposed on the first electrode and deformed according to an external magnetic field change; A second material layer facing the first material layer and spaced apart from each other; And a second electrode disposed on the second material layer on the opposite side of the surface facing the first material layer, the first material layer being deformed according to a change in an external magnetic field, and the second material layer and It repeats contact and non-contact and generates triboelectric energy.

The first material layer may be any flexible material coated with a ferromagnetic material on the surface.

The first material layer may be in the form of a flexible ferromagnetic film layer.

The first material layer may be a polymer material whose potential energy changes in response to a magnetic field.

The first material layer is made of a complex material whose potential energy changes in response to a magnetic field, and the complex material may have a form in which a ferromagnetic element is embedded in a polymer material.

The ferromagnetic element is any one or more of Fe, Co, Ni, Gd, Tb, Dy, Ho, Er, Tm, Cr, Mn, Nd, Sm, Eu, Pt, Rh, Pd, Li, Na, K Includes.

The ferromagnetic element includes ferromagnetic alloys such as Silicon-iron, Cobalt-iron, Mumetal, Typical dust core, Ferrite core, Permalloy, and Supermalloy.

The polymer material may be a flexible and polymerizable film.

The ferromagnetic element is embedded in the polymer material in the form of particles, wires, rods, and layers.

Drawers connected to the first electrode and the second electrode, respectively; And an energy storage unit connected to the drawing unit. A rectifying diode is connected between the lead portion and the energy storage portion.

A triboelectric power generating element using an external magnetic field according to a further embodiment of the present invention includes: a first electrode; A first material layer made of a material disposed on the first electrode and deformed according to an external magnetic field change; And a second material layer facing the first material layer and spaced apart from each other and serving as a second electrode, wherein the first material layer is deformed according to a change in an external magnetic field to contact the second material layer and Repeat non-contact and generate frictional electrical energy.

 The first material layer may be any flexible material coated with a ferromagnetic material on the surface.

The first material layer may be in the form of a flexible ferromagnetic film layer.

The first material layer may be a polymer material whose potential energy changes in response to a magnetic field.

The first material layer is made of a complex material whose potential energy changes in response to a magnetic field, and the complex material may be a form in which a ferromagnetic element is embedded in a polymer material.

The ferromagnetic element is any one or more of Fe, Co, Ni, Gd, Tb, Dy, Ho, Er, Tm, Cr, Mn, Nd, Sm, Eu, Pt, Rh, Pd, Li, Na, K Includes.

The ferromagnetic element includes ferromagnetic alloys such as Silicon-iron, Cobalt-iron, Mumetal, Typical dust core, Ferrite core, Permalloy, and Supermalloy.

The polymer material is a flexible and polymerizable film.

The ferromagnetic element may be embedded in the polymer material in the form of particles, wires, rods, or layers.

Lead portions respectively connected to the first electrode and the second material layer; And an energy storage unit connected to the drawing unit. A rectifying diode may be connected between the lead portion and the energy storage portion.

According to the present invention, the magnetic field-based triboelectric power generating element is not only a large alternating magnetic field environment such as a transmission line (air line, underground line, underwater line, etc.) where an AC magnetic field of a very low frequency (60 Hz) is formed when a high voltage current flows, but also in our lifetime It has the advantage of being capable of self-driving even in small AC magnetic field environments such as electric wires and household appliances in daily life.

In addition, the device according to the present invention has the advantages of being flexible, having a small weight and volume, being much cheaper and being able to operate in a low frequency environment.

1A-1B illustrate an operation state of a triboelectric power generating element using an external magnetic field according to an embodiment of the present invention.
2A-2B illustrate an operation state of a triboelectric power generating element using an external magnetic field according to an embodiment of the present invention.
Figure 3 shows the operating principle of the triboelectric power generation device using an external magnetic field according to an embodiment of the present invention.
4 shows an example of the dimensions of a complex structure that responds to the magnetic field used in the present invention.
5 shows a schematic diagram of a material of a complex structure that responds to a magnetic field used in the present invention.
6 shows a photograph of a film in which a magnetic field reactant prepared according to an embodiment is mixed.
7 shows an experiment in which the potential energy change of the magnetic field reactant according to the magnetic field strength is confirmed.
8 shows a graph of triboelectric generation voltage and current of a magnetic field reaction film.
Various embodiments are now described with reference to the drawings, and like reference numbers throughout the drawings are used to indicate similar elements. For purposes of illustration, various descriptions are presented to provide an understanding of the invention. However, it is apparent that these embodiments can be practiced without these specific details. In other instances, well-known structures and devices are presented in block diagram form in order to facilitate describing the embodiments.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention can be applied to various changes and may have various forms, and specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosure form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing each drawing, similar reference numerals are used for similar components.

The terms used in the present application are only used to describe specific embodiments and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "include" or "have" are intended to indicate the presence of features, steps, actions, components, parts or combinations thereof described in the specification, one or more other features or steps. It should be understood that it does not preclude the existence or addition possibility of the operation, components, parts or combinations thereof.

The present invention is to develop a material that changes the potential energy in response to a magnetic field and utilizes it as a friction material, thereby providing a triboelectric power generation device system that is self-driven by a magnetic field generated in the surrounding environment. As a result, contact and separation of the two friction materials is possible according to a change in the magnetic field even in an environment in which no external mechanical energy is present, thereby enabling power generation by generating frictional electricity.

1A-1B illustrate an operation state of a triboelectric power generating element using an external magnetic field according to an embodiment of the present invention.

As shown in Figure 1a, a triboelectric power generating element using an external magnetic field according to an embodiment of the present invention includes a first electrode 11; A first material layer 20 made of a material that is deformed according to an external magnetic field change; A second material layer 30; And a second electrode 12.

The first electrode 11 may be used as long as it can be used as an electrode material. For example, ITO, Al, or the like can be used.

The first material layer 20 is disposed on the first electrode and is made of a material that is deformed according to an external magnetic field change. In addition, the first material layer should be made of a flexible material.

As the first material layer, any one of a polymer material in which potential energy changes in response to a magnetic field, a material coated with a ferromagnetic material, and a film layer of a ferromagnetic material may be used, or a complex material in which potential energy changes in response to a magnetic field may be used. .

First, when a ferromagnetic material coated with a ferromagnetic material or a ferromagnetic film film that reacts with a magnetic field as a first material layer is used, ferromagnetic materials include Fe, Co, Ni, Gd, Tb, Dy, Ho, Er, Tm, It may be an alloy containing any one or more of Cr, Mn, Nd, Sm, Eu, Pt, Rh, Pd, Li, Na, K. Typical ferromagnetic alloys include Silicon-iron, Cobalt-iron, Mumetal, Typical dust core, Ferrite core, Permalloy, and Supermalloy.

Next, when a polymer material whose potential energy changes in response to a magnetic field as a first material layer is used, p-TCNQ, which has a magnetic structure by causing a polymerization reaction in the organic compound tetracyanoquinodimethane (TCNQ), Material synthesis is possible. Since the spins of the internal electrons are aligned in one direction, the organic compound containing carbon atoms exhibits magnetic properties. Since p-TCNQ changes potential energy in response to a magnetic field, it can be used as a magnetic field-based triboelectric power plant material.

Next, when a composite material in which potential energy changes in response to a magnetic field is used as the first material layer, the composite material may be used in a form in which a ferromagnetic element is embedded in a polymer material.

The complex structure has 0-3, 1-1, 1-3, 2-2, 3-3, etc., depending on the dimension. The typical method of mixing a material that reacts with a magnetic field and a flexible matrix material is 0-3. have. The dimensions of this complex structure are shown in FIG. 4. That is, the composite structure has a form in which ferromagnetic elements are embedded in a polymer material in the form of particles, wires, rods, and layers.

Among the elements that react to the magnetic field (ferromagnetic elements) are Fe, Co, Ni, Gd, Tb, Dy, Ho, Er, Tm, Cr, Mn, Nd, Sm, Eu, Pt, Rh, Pd, Li, Na, K Any one or more may be used or a ferromagnetic alloy such as Silicon-iron, Cobalt-iron, Mumetal, Typical dust core, Ferrite core, Permalloy, or Supermalloy may be used as their alloy.

The polymer material is flexible and a filmable polymer is used, and such flexible matrix materials include Nylon, PP, PI, PE, LDPE, HDPE, Ecoflex, Dragon skin, PDMS, PMMA, PVA, PVDF, and P (VDF-TrFE) ), P (VDF-TrFE-CFE), PTFE, Melamine formaldehyde resin, Urea formaldehyde resin, Urea series, and all possible polymer materials. Therefore, by mixing the material reacting with the magnetic field and the flexible matrix material to form a film, a material in which the potential energy changes in response to the magnetic field can be produced. As a filming method, spin coating, bar coating, dip coating, drop, etc. may be used. At this time, the type of the material reacting to the magnetic field, the type of the flexible matrix material, the concentration of the magnetic field reacting material, and the flexible matrix material By adjusting the conditions such as thickness and area of the material, it is possible to optimize the material for maximizing the output under a specific magnetic field change condition. 5 shows a schematic diagram of a material of a complex structure reacting to a magnetic field.

The second material layer 30 faces the first material layer 20 and is spaced apart from each other. The second material layer generates frictional electrical energy by repeating contact and non-contact with the first material layer. Therefore, it is preferable that the first material layer and the second material layer are made of a material having a large difference in charging characteristics on the triboelectric charging column.

The second electrode 12 is disposed on the second material layer, in this case on the opposite side of the surface facing the first material layer. The second electrode 12 can be used as long as it can be used as an electrode material. For example, ITO, Al, or the like can be used.

In a triboelectric power generation device using an external magnetic field according to an embodiment of the present invention, the first material layer is deformed according to a change in the external magnetic field, thereby repeating contact and non-contact with the second material layer to generate triboelectric energy. This can be seen in Figure 1b, Figure 3 shows the operating principle of the triboelectric power generation device using an external magnetic field according to an embodiment of the present invention.

Meanwhile, the lead portions 41 and 42 are respectively connected to the first electrode and the second electrode, and the energy storage portion 60 may be additionally connected to the lead portion. Rectifying diodes 51 and 52 may be connected between the lead-out unit and the energy storage unit. As shown in FIG. 1A, an energy storage unit 60 such as a storage battery is connected to the lead-out unit. Rectifying diodes 51 and 52 may be connected between the lead-out portion and the energy storage portion. A load may be connected to the lead wire, whereby the light bulb may be directly lit. On the other hand, the diode serves as a rectifying diode to allow current to flow in only one direction, thereby preventing current from flowing and the battery 60 to discharge.

The embodiment of FIGS. 1A and 1B is for an embodiment in which the first electrode and the second electrode are respectively present, and FIGS. 2A and 2B show an embodiment in which the second material layer simultaneously serves as the second electrode. It is about. Hereinafter, the embodiments of FIGS. 2A and 2B will be described, and since there is a difference only in the presence or absence of the second electrode, the rest will be the same, so repeated description will be omitted.

A triboelectric power generating element using an external magnetic field according to a further embodiment of the present invention is illustrated in FIGS. 2A and 2B, which includes a first electrode 11; A first material layer 20 made of a material disposed on the first electrode and deformed according to an external magnetic field change; And a second material layer 30 facing the first material layer and spaced apart from each other and serving as a second electrode.

In such a device, the first material layer is deformed according to a change in an external magnetic field, and repeats contact and non-contact with the second material layer to generate frictional electric energy.

The first material layer may be one of a polymer material in which the potential energy changes in response to a magnetic field, a material coated with a ferromagnetic material, and a film of a ferromagnetic film, or a composite material in which a potential energy changes in response to a magnetic field may be used.

When a composite material whose potential energy changes in response to a magnetic field is used as the first material layer, the composite material is a form in which a ferromagnetic element is embedded in a polymer material, and the ferromagnetic element is a particle, wire, or rod in the polymer material. ), It is embedded as a layer. Ferromagnetic elements are any one or more of Fe, Co, Ni, Gd, Tb, Dy, Ho, Er, Tm, Cr, Mn, Nd, Sm, Eu, Pt, Rh, Pd, Li, Na, K Or, these alloys include ferromagnetic alloys such as Silicon-iron, Cobalt-iron, Mumetal, Typical dust core, Ferrite core, Permalloy, and Supermalloy, and the polymer material is flexible and a filmable polymer is used.

Further, a lead portion may be connected to the first electrode and the second material layer, respectively, and an energy storage portion may be connected to the lead portion. In addition, a rectifying diode may be connected between the lead-out portion and the energy storage portion.

Hereinafter, the contents of the present invention will be further described together with specific examples.

For the basic experiment of the magnetic field-based triboelectric power generation device, a carbon compound, a Fe compound formed by coordinating carbon monoxide with iron, was used as a magnetic field reaction material, and a PDMS material was used as a flexible matrix material. A 3-3 composite structure was prepared by mixing PDMS and Carbonyl Iron in a ratio of 1 to 2, and then coated with a thickness of 1 mm, and heat-treated at 65 degrees for 2 hours to form a film. The photograph of the produced film is shown in FIG. 6.

In the basic experiments, the characteristic changes according to the strength of the magnetic field were analyzed, and finally the output value of the triboelectric power generator was measured. Neodymium magnets were used as the magnets, and magnetic field conditions were changed using magnets having a magnetic field strength of 2000 mm, 3500 mm, and 4000 mm, respectively, with thicknesses of 2 mm, 5 mm, and 10 mm. As shown in FIG. 7, it was confirmed that as the thickness of the magnet increased, the intensity of the magnetic field increased, so that the potential energy change of the magnetic field reactant gradually increased.

8 shows a graph of triboelectric generation voltage and current of a magnetic field reaction film. The voltage and current of the triboelectric power generator were measured using a magnetic field reactant-based triboelectric material and nylon, and it was confirmed that a voltage of 150V and a current of 20μA were generated as shown in FIG. 8.

The description of the presented embodiments is provided to enable any person of ordinary skill in the art to use or practice the present invention. Various modifications to these embodiments will be apparent to those skilled in the art of the present invention, and the general principles defined herein can be applied to other embodiments without departing from the scope of the present invention. Thus, the present invention should not be limited to the embodiments presented herein, but should be interpreted in the broadest scope consistent with the principles and novel features presented herein.

Claims (18)

A first electrode;
A first material layer made of a material disposed on the first electrode and deformed according to an external magnetic field change;
A second material layer facing the first material layer and spaced apart from each other; And
A second electrode disposed on the second material layer opposite to the first material layer opposite to the first material layer,
The first material layer is deformed according to a change in an external magnetic field to repeat contact and non-contact with the second material layer to generate triboelectric energy,
Triboelectric power generation device using an external magnetic field.
According to claim 1,
In the first material layer, any one of a polymer material whose potential energy changes in response to a magnetic field, a ferromagnetic material coated material, and a ferromagnetic film film is used.
Triboelectric power generation device using an external magnetic field.
According to claim 1,
The first material layer is made of a complex material whose potential energy changes in response to a magnetic field,
The composite material is a form in which a ferromagnetic element is embedded in a polymer material,
Triboelectric power generation device using an external magnetic field.
The method of claim 3,
The ferromagnetic element is any one or more of Fe, Co, Ni, Gd, Tb, Dy, Ho, Er, Tm, Cr, Mn, Nd, Sm, Eu, Pt, Rh, Pd, Li, Na, K Including,
Triboelectric power generation device using an external magnetic field.
The method of claim 3,
The ferromagnetic element includes a ferromagnetic alloy such as Silicon-iron, Cobalt-iron, Mumetal, Typical dust core, Ferrite core, Permalloy, Supermalloy,
Triboelectric power generation device using an external magnetic field.
The method of claim 3,
The polymer material is a flexible and polymerizable film,
Triboelectric power generation device using an external magnetic field.
The method of claim 3,
The ferromagnetic element is embedded in the polymer material in the form of particles, wires, rods, layers,
Triboelectric power generation device using an external magnetic field.
According to claim 1,
Drawers connected to the first electrode and the second electrode, respectively; And
Further comprising an energy storage connected to the withdrawal,
Triboelectric power generation device using an external magnetic field.
The method of claim 8,
A rectifying diode is connected between the lead portion and the energy storage portion,
Triboelectric power generation device using an external magnetic field.
A first electrode;
A first material layer made of a material disposed on the first electrode and deformed according to an external magnetic field change; And
And a second material layer facing the first material layer and spaced apart from each other and serving as a second electrode,
The first material layer is deformed according to a change in an external magnetic field to repeat contact and non-contact with the second material layer to generate triboelectric energy,
Triboelectric power generation device using an external magnetic field.
The method of claim 10,
In the first material layer, any one of a polymer material whose potential energy changes in response to a magnetic field, a ferromagnetic material coated material, and a ferromagnetic film film is used.
Triboelectric power generation device using an external magnetic field.
The method of claim 10,
The first material layer is made of a complex material whose potential energy changes in response to a magnetic field,
The composite material is a form in which a ferromagnetic element is embedded in a polymer material,
Triboelectric power generation device using an external magnetic field.
The method of claim 12,
The ferromagnetic element is any one or more of Fe, Co, Ni, Gd, Tb, Dy, Ho, Er, Tm, Cr, Mn, Nd, Sm, Eu, Pt, Rh, Pd, Li, Na, K Including,
Triboelectric power generation device using an external magnetic field.
The method of claim 12,
The ferromagnetic element includes a ferromagnetic alloy such as Silicon-iron, Cobalt-iron, Mumetal, Typical dust core, Ferrite core, Permalloy, Supermalloy,
Triboelectric power generation device using an external magnetic field.
The method of claim 12,
The polymer material is a flexible and polymerizable film,
Triboelectric power generation device using an external magnetic field.
The method of claim 12,
The ferromagnetic element is embedded in the polymer material in the form of particles, wires, rods, layers,
Triboelectric power generation device using an external magnetic field.
The method of claim 10,
Lead portions respectively connected to the first electrode and the second material layer; And
Further comprising an energy storage connected to the withdrawal,
Triboelectric power generation device using an external magnetic field.
The method of claim 17,
A rectifying diode is connected between the lead portion and the energy storage portion,
Triboelectric power generation device using an external magnetic field.

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