KR101220403B1 - Nanogenerator and manufacturing method thereof which have entire coated nanowires - Google Patents

Abstract

PURPOSE: A nano generator and manufacturing method thereof are provided to make sharp the end portion of nanowire on whole nanowires. CONSTITUTION: An upper electrode is formed on an upper plate having sawtooth. An electricity storing member accumulates the electricity delivered from each electrode. A supporter is installed at both terminals of a lower plate. Multiple nanowires(24) are grown from a seed layer(23) in a vertical direction. Each nanowire is coated with a coating film(29).

Description

Nanogenerator with a coating film formed on the entirety of nanowires and a method of manufacturing the same

TECHNICAL FIELD The present invention relates to a nanogenerator, and more particularly, to a nanogenerator and a method of manufacturing the same, using the piezoelectric effect of a material such as zinc oxide (ZnO) to produce power from irregular movement. It is about.

That is, the present invention improves the problem that the coating film is formed only at the ends of the nanowires of the conventional nanogenerator, and relates to a nanogenerator having the nanowires coated as a whole and a method of manufacturing the same.

In recent years, there has been an increasing demand for environmentally friendly energy due to problems such as environmental pollution. In addition, as portable electronic devices such as smart phones and tablet PCs are popularized, there is a growing demand for technologies for charging batteries and batteries.

That is, a user of a portable device uses a device or a battery in a charged state while it is being used. When the battery is discharged, the device charges the device and the battery using electricity supplied through an outlet such as a house or an office, It was common to use.

On the other hand, in recent years, so-called User Created Power (UCP) technology has been researched in which, instead of the conventional charging method, charging is performed in the form of self-power generation without requiring a separate charger.

More specifically, as an example of this User Evolution (UCP), there is, for example, a self-powered "yo-yo generator" developed by MIT graduates.

That is, the yoyo generator described above is configured to generate electric power of 15 to 20 W while the built-in generator is turned when the string is pulled. By carrying such a small self-powered charging device, .

Another example of the user power generation (UCP) is a self-generating type health bike that is configured to generate power when a generator is connected to a fitness device, for example. This is because when the user presses the bike pedal Generators produce 100 to 200 watts of power sufficient to turn on 20-inch TVs.

In other words, if you use the fitness equipment as described above, at least 30 minutes to one hour to rotate the pedal to watch TV programs, not only saves the electric energy, but also keeps the movement effect to watch TV Therefore, if it is applied to other fitness equipment, it is expected that the demand of members can be reduced by a considerable amount of power.

However, the above-described yoyo generator and self-generating type health bike have to repeatedly perform a certain operation, so that it is difficult for the user to continue the same operation for a long time.

That is, as described above, user development is a field that requires a lot of research and development in the future in order to cope with an ever-increasing demand for electric power. As a part of such research, for example, Research is being conducted on technologies to produce electric power utilizing various irregular movements of the human body.

More specifically, for example, a nano generator has been proposed by Professor Wong Jong-Lin of Georgia Tech University, which converts hamster motion into electric current.

This is the world's first example of irregular biological movements to electrical energy, that is, it is known that theoretically, muscle contraction and relaxation of all living things can be converted into mechanical energy to generate electricity. However, due to its irregular motion characteristics, It can be said that it is meaningful because it proves that it can change the muscle force of an animal or a human being which is irregular and very microscopic by solving a problem which has not succeeded.

More specifically, the above-mentioned nano-generator is a nano-generator using a piezoelectric effect. Here, the piezoelectric effect refers to an effect that a physical force is applied to a piezoelectric body such as a crystal or a ceramic to convert the force into electric energy.

Therefore, by using the piezoelectric effect as described above, it is possible to make the irregular movement that occurs when the muscle moves, into electric energy.

More specifically, the above-mentioned nanogenerator has a structure in which nanowires made of zinc oxide (ZnO) are adhered to a thin and well-bending polymer substrate. When the hamster moves, the wire bends and current flows.

Therefore, using this method, it is possible to connect the irregular movement that occurs when the muscle moves to power generation, and recently, a case has been known to succeed in experiments to generate electricity by making cloth from nanowires.

However, the above-mentioned nano generator has a very low power generation amount, so that it is necessary to collect about 1,000 hamsters to charge the mobile phone. Therefore, researches on nano generators having more power generation are actively conducted.

In addition, the conventional nanogenerator tends to break easily when the nanowire receives a force in a diagonal direction other than the horizontal or vertical direction while the nanowire is repeatedly being deformed, thereby preventing the nanowire from being broken and its physical and chemical properties. There is a need to provide a method for improving this.

Further, the details of the principle of the nano generator as described above can be easily understood by referring to the contents described in the following reference.

[references]

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The present invention seeks to address the shortcomings of the prior art nanogenerators as described above, and therefore the object of the present invention is to provide for each nanowire, for example, to prevent breakage of nanowires and to improve their properties. It is to provide a nanogenerator coated with a polymer material such as polyvinylidene fluoride (PVDF).

That is, in more detail, the object of the present invention is conventionally, for example, by simply applying PVDF to a nanowire formed in a columnar shape, the coating film is formed only at the end of the nanowire and the coating film is properly formed toward the side surface. In order to solve the problem that has not been, by forming the end of the nanowire in a pointed shape is to be provided so that the entire nanowire is coated with a coating film is to provide a nano-generator and a method of manufacturing the coating film is formed on the entire nanowire.

In order to achieve the above object, according to the present invention, in the nanogenerator, an upper substrate and a lower substrate, respectively disposed on the upper and lower surfaces, a seed layer disposed on the lower substrate, and perpendicular to the seed layer A plurality of nanowires, each of which grows in a direction, and is disposed between the lower substrate and the seed layer to transfer electricity generated from the nanowires to the outside, and is formed in a sawtooth shape on the upper electrode and the upper substrate made of a conductor. An upper electrode, power storage means for accumulating electricity transferred from each electrode, and a support disposed at left and right ends of the lower substrate, respectively, to prevent the upper substrate and the lower substrate from contacting each other and to maintain a predetermined interval, respectively; Nano comprising a coating film to coat the entirety of the nanowires of A generator is provided.

Here, the nanowire is characterized in that the end portion is formed in a pointed shape.

In addition, the coating film is characterized in that made of a polymeric material containing polyvinylidene fluoride (PVDF).

Further, according to the present invention, in the method of manufacturing a nanogenerator, forming an upper substrate and a lower substrate respectively disposed on the upper and lower surfaces, forming a lower electrode made of a conductor on the lower substrate, Forming a seed layer for growing nanowires on the lower electrode, forming an upper electrode in a sawtooth shape on the upper substrate, and installing power storage means for accumulating electricity transferred from each electrode; And installing a support on both left and right ends of the lower substrate to prevent the upper substrate and the lower substrate from contacting each other and to maintain a predetermined interval, and to grow a plurality of nanowires in a vertical direction from the seed layer. And coating the entirety of each of the nanowires with a coating film. It is provided a method for manufacturing a nano-generator.

Here, the step of growing the nanowires, characterized in that to form a pointed end of the nanowires.

The coating may include coating the entirety of the nanowires with a polymer material including polyvinylidene fluoride (PVDF).

As described above, according to the present invention, it is possible to provide a nanogenerator having a coating layer formed on the entirety of the nanowire and a method of manufacturing the same by improving a problem in that a coating layer is formed only at an end portion of the nanowire of the conventional nanogenerator.

1 is a view schematically showing the overall configuration of a nanogenerator according to the prior art.
2 is a view showing a state in which a coating film is formed on the nanowires in the conventional nanogenerator shown in FIG.
3 is a view schematically showing the overall configuration of a nanogenerator according to the present invention.
Figure 4 is an enlarged view for explaining in detail the configuration of the nanowires and the coating film of the nano-generator according to the present invention shown in FIG.

Hereinafter, with reference to the accompanying drawings, it will be described a specific embodiment of the nano-generator and a method for manufacturing the coating film is formed on the entirety of the nanowire according to the present invention.

Here, it should be noted that the contents described below are only examples for carrying out the present invention, and the present invention is not limited to the contents of the embodiments described below.

That is, the nanogenerator having a coating film formed on the whole of the nanowire according to the present invention and a method of manufacturing the same, as described below, improve the problem that the coating film is formed only at the end portion of the nanowire of the conventional nanogenerator, thereby coating the nanowire It is intended to be formed in the whole.

Here, referring to FIG. 1, the configuration of a conventional nanogenerator will be described.

That is, as shown in FIG. 1, the conventional nanogenerator 10 includes an upper substrate 11 and a lower substrate 12 formed of a flexible polymer and disposed on the upper and lower surfaces, respectively, and on the lower substrate 12. A seed layer 13 made of high density zinc oxide, a plurality of nanowires 14 growing vertically from the seed layer 13, and the nano A lower electrode 15 disposed between the lower substrate 12 and the seed layer 13 to transfer electricity generated from a wire, an upper electrode 16 disposed on the upper substrate 11 and zigzag-shaped; And a power storage means 17 for accumulating electricity transferred from the electrodes 15 and 16, and a support for maintaining a predetermined interval such that each substrate 11 and 12 does not come into contact with each other when the substrates 11 and 12 are deformed. 18) and a coating film 19 formed on the top of the nanowires.

Here, the power storage means 17 may use, for example, an element such as a capacitor.

More specifically, as shown in FIG. 1, the conventional nanogenerator 10 is configured by growing a plurality of nanowires 14 on a substrate in a predetermined direction and applying a force to the substrate so that the substrate is bent. When electricity is generated in the nanowires 14 by the piezoelectric effect, the electricity generated in this way is accumulated in the power storage means 17 such as an external capacitor through the electrodes 15 and 16 to generate electricity. will be.

In addition, the conventional nanogenerator 10 shown in FIG. 1 is, for example, polyvinylidene fluoride (PVDF) on each nanowire 14 in order to prevent breakage of the nanowire 14 and improve its characteristics. By coating a polymer material such as to form a coating film.

Here, PVDF is a material having a high piezoelectric constant, and when such a material is applied to nanowires, there is an effect of obtaining much more piezoelectric elements than using only nanowires.

More specifically, when nanowires are coated with a high piezoelectric material such as PVDF, the surface area of the nanowires is maximized, thereby achieving higher efficiency than when the nanogenerator is composed of only ZnO nanowires.

In addition, the coating material is not limited to PVDF, and any material may be used as long as the material has a high piezoelectric constant. In the following description, the nanowire is coated with PVDF as an example.

That is, referring to Figure 2, Figure 2 is a view showing a state in which a coating film is formed on the nanowires in the conventional nanogenerator shown in FIG.

More specifically, the conventional nanogenerator, for example, as shown in Figure 2, by simply applying a polymer material such as PVDF to the nanowire 14 formed in a columnar shape, the coating film 19 is a nanowire ( It was formed only at the end of 14), and the side surface thereof had a disadvantage in that the coating film 19 was not properly formed.

In order to solve this problem, the present invention, a nano-generator capable of forming a coating film on the entire nanowire as follows.

Next, with reference to FIG. 3, the detail of the nanogenerator which concerns on this invention is demonstrated.

Referring to FIG. 3, FIG. 3 is a view schematically showing the overall structure of a nanogenerator according to the present invention.

That is, as shown in Figure 3, the nano-generator 20 according to the present invention, the upper substrate 21 and the lower substrate 22 disposed on the upper and lower surfaces, respectively, is formed on the lower substrate 22 A seed layer 23, a plurality of nanowires 24 each growing in a vertical direction from each of the seed layers 23, and the lower substrate for transferring electricity generated from the nanowires 24 to the outside; A lower electrode 25 formed between a layer 22 and the seed layer 23 and made of a conductor, an upper electrode 26 formed in a serrated shape on the upper substrate 21, and respective electrodes 25 and 26. Power storage means 27 for accumulating electricity transferred from the < RTI ID = 0.0 > and < / RTI > 28 and a coating film 29 for coating the entirety of each of the nanowires 24. It is configured.

Therefore, when the force is applied to the nanogenerator 20 through the configuration as described above, the upper and lower substrates 21, 22 are pressed toward each other or the substrate is bent, the electricity generated by the nanowires 24 The electrodes 25 and 26 are collected in the power storage means 27, and the electric power is generated by repeating the deformation of the nanowires 24.

In addition, the electrical storage means 27 can use an element, such as a capacitor, for example.

Here, as described above, since the principle itself of generating power using the piezoelectric effect by modifying the nanowire 24 is the same as that of the prior art, its detailed description is omitted, but the nanogenerator 20 according to the present invention is 4, each nanowire 24 is characterized in that the end is formed in a pointed shape.

That is, referring to Figure 4, Figure 4 is an enlarged view for explaining in detail the configuration of the nanowire and the coating film of the nano-generator according to the present invention shown in FIG.

More specifically, the conventional nanogenerator, as shown in Figure 2, by simply applying a polymer material such as PVDF to the nanowire 14 formed in a columnar shape, the coating film 19 is the end of the nanowire 14 Although only a portion thereof is formed, and a side surface thereof has a disadvantage in that the coating film 19 is not properly formed, the nanogenerator 20 according to the present invention has an end portion of the nanowire 24 as shown in FIG. 4. By forming in a pointed shape, the coating material reaches to the seed 23 of the lower substrate 22, and as a result is configured so that the coating film 29 can be formed over the entire nanowire 24.

Therefore, as described above, it is possible to implement a nano-generator and a method of manufacturing the coating film is formed on the entirety of the nanowires according to the present invention, whereby the entirety of the nanowires can be coated with a coating film to improve the characteristics of the nanowires It is possible to provide a nanogenerator that can be improved.

In addition, since the other content is the same as that of the conventional nanogenerator, the detailed description is abbreviate | omitted here for simplicity of description.

As described above, the nanogenerator having a coating film formed on the entirety of the nanowire according to the present invention and the manufacturing method thereof through the embodiments of the present invention as described above, but the present invention is described in the above embodiments. However, the present invention is not limited thereto, and therefore, it is obvious that various modifications, changes, combinations, and substitutions may be made by those skilled in the art according to design needs and various other factors. I will call it work.

10. Nano Generator 11. Upper Board
12. Lower substrate 13. Seed layer
14. Nanowire 15. Bottom electrode
16. Upper electrode 17. Power storage means
18. Support 19. Coating Film
20. Nano Generator 21. Upper Board
22. Lower substrate 23. Seed layer
24. Nanowire 25. Bottom electrode
26. Upper electrode 27. Power storage means
28. Support 29. Coating Film

Claims (6)

In the nanogenerator in which a coating film is formed over the entire nanowire,
An upper substrate and a lower substrate disposed on upper and lower surfaces, respectively;
A seed layer disposed on the lower substrate;
A plurality of nanowires each growing in a vertical direction from the seed layer;
A lower electrode made of a conductor and an upper electrode formed in a sawtooth shape on the upper substrate to be disposed between the lower substrate and the seed layer to transfer electricity generated from the nanowires to the outside;
Power storage means for accumulating electricity transferred from each electrode;
Support members disposed at left and right ends of the lower substrate, respectively, to prevent the upper substrate and the lower substrate from contacting each other and to maintain a predetermined gap; And
It comprises a coating film for coating each of the nanowires,
Each of the nanowires, characterized in that the tip is formed in a pointed shape, the coating material forming the coating film reaches to the seed layer is configured to form the coating film over the entire of the nanowires generator.
delete The method of claim 1,
The coating film is a nano-generator, characterized in that made of a polymer material containing PVDF (Polyvinylidene fluoride).
In the method of manufacturing a nano-generator to form a coating film over the entire nanowire,
Forming an upper substrate and a lower substrate respectively disposed on the top and bottom surfaces thereof;
Forming a lower electrode made of a conductor on the lower substrate;
Forming a seed layer for growing nanowires on the lower electrode;
Forming an upper electrode on the upper substrate in a sawtooth shape;
Providing power storage means for accumulating electricity transferred from each electrode;
Installing support members on both left and right ends of the lower substrate to prevent the upper substrate and the lower substrate from contacting each other and to maintain a predetermined interval;
Growing a plurality of nanowires in a vertical direction from the seed layer; And
Coating each of the nanowires with a coating film,
In the growing of the nanowires, the ends of each of the nanowires are formed in a pointed shape, such that the coating material forming the coating film reaches the seed layer to form the coating film over the entire nanowire. Method for producing a nanogenerator, characterized in that configured to.
delete 5. The method of claim 4,
The coating may include coating the entirety of the nanowires with a polymer material including polyvinylidene fluoride (PVDF).

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