Power generation structure

Abstract

Provided is a power generation structure having more improved electrical characteristics. A power generation structure 1 according to the present disclosure comprises: a charged body 10 composed of high dielectric constant fibers having dielectric constants of 4.8 or more; and a friction subject body 20 which is rubbed with the charged body 10 to generate power.

Description

Power generation structure

[0001] The present disclosure relates to power generating structures.

[0002] In recent years, rapid developments in electronics and materials technologies have led to the development of new, highly integrated microelectronic devices with multiple functions, which are now widely used in society. These microelectronic devices are typically powered directly or indirectly by batteries. Batteries are not only bulky and heavy, but also contain toxic chemicals that pose potential risks to the environment and human health. Therefore, the development of technologies that convert naturally occurring mechanical energy, such as motion and vibration, into electrical energy is crucial.

[0003] As a technology for converting mechanical energy into electrical energy, Patent Document 1 discloses a triboelectric nanogenerator that harvests mechanical energy from a liquid. Non-Patent Document 1 also discloses a triboelectric nanogenerator in which highly dielectric nanoparticles are contained in a PDMS film. Non-Patent Document 2 also discloses a linear grating triboelectric generator based on slide charging.

[0004] Special table 2016-529868 publication

[0005] Jie Chen, Hengyu Guo, Xianming He,Guanlin Liu,Yi Xi, Haofei Shi, and Chenguo Hu "Enhancing Performance of Triboelectric Nanogenerator by Filling High Dielectric Nanoparticles into Sponge PDMS Film" Appl. Mater. Interfaces, 8, 736744 (2016)Guang Zhu, Jun Chen, Ying Liu, Peng Bai, Yu Sheng Zhou, Qingshen Jing, Caofeng Pan, and Zhong Lin Wang "Linear-Grating Triboelectric Generator Based on Sliding Electrification" Nano Lett. 2013, 13, 2282-2289

[0006] The friction-type generators described in the above-mentioned prior art documents generate electricity by generating a potential difference on the surface of a charged body through friction. When applying the above-mentioned friction-type generators to electronic components, it is desirable to improve the electrical characteristics (for example, current density). In other words, although the friction-type generators described in Patent Document 1 and Non-Patent Documents 1 and 2 can achieve predetermined electrical characteristics, there is still room for further improvement in improving the electrical characteristics.

[0007] Therefore, an object of the present disclosure is to provide a power generating structure with improved electrical properties.

[0008] The power generating structure of the present disclosure comprises a charged body made of high dielectric constant fibers having a dielectric constant of 4.8 or more, and a friction target body that generates electricity when rubbed against the charged body.

[0009] According to the present disclosure, it is possible to provide a power generating structure with improved electrical properties. Specifically, since the dielectric constant of the charged body is 4.8 or more, the charged body can be more easily charged. Furthermore, by making the charged body in a fibrous form, it is possible to increase the friction area per unit displacement.

[0010] FIG. 1 is a perspective view of a power generating structure according to a first embodiment of the present disclosure. FIG. 2 is a schematic cross-sectional view taken along line II-II in FIG. 1. FIG. 3 is a perspective view of a power generating structure according to a second embodiment of the present disclosure. FIG. 4 is a schematic cross-sectional view taken along line IV-IV in FIG. 3. FIG. 5 is a schematic cross-sectional view of a modified example of the second embodiment. FIG. 6 is a perspective view of another modified example of the second embodiment. FIG. 7A is an explanatory diagram schematically illustrating power generation by a power generating structure. FIG. 7B is an explanatory diagram schematically illustrating power generation by a power generating structure. FIG. 8 is a cross-sectional view of a power generating structure according to a third embodiment of the present disclosure. FIG. 9 is a graph showing the relationship between the dielectric constant of high dielectric constant fibers and the volume fraction of high dielectric material.

[0011] [Findings, etc. that form the basis of this disclosure] In 2012, ZL Wang of the Georgia Institute of Technology published a paper on a frictional nanogenerator. This is intended to enable a device that uses contact charging to convert mechanical energy into electrical energy. Since ZL Wang's publication of the frictional nanogenerator, research has been ongoing into increasing the generated voltage and current (density) by controlling the surface of a charged body and / or by combining materials with large differences in the triboelectric series.

[0012] For example, Jie Chen et al. in Non-Patent Document 1 reported that by adding dielectric nanoparticles to polydimethylsiloxane (PDMS) and contacting it with a copper film, a maximum generated voltage of 260 V and a current of 6 μA / cm ２However, Non-Patent Document 1 also discloses that the voltage and current density decrease when the amount of dielectric added exceeds a threshold value. In other words, it suggests that there is a technical limit to simply increasing the amount of added PDMS. Furthermore, even when nanoparticles are simply modified on the surface of the charged body, rather than inside the charged body, the current density output from the charged body is 0.08 μA / cm. ２ It was.

[0013] When applying frictional power generation using a charged body to electronic components, further improvements in electrical properties are required. Methods for improving electrical properties include, for example, selecting a material with appropriate charging properties and / or changing the shape of the charged body to increase the friction area per unit displacement.

[0014] One method for increasing the friction area per unit displacement is to convert a plate-shaped charged body into a fiber-shaped charged body. By converting the charged body into a fiber-shaped charged body, unevenness is created on the fiber surface, increasing the contact area between the charged body and the friction target. However, there were technical challenges in manufacturing a power generating structure by converting the plate-shaped charged body described in Non-Patent Documents 2 and 3 into a fiber-shaped charged body. For example, in the case of composite fibers made of dielectric nanoparticles and resin, increasing the amount of ceramic nanoparticles added causes a loss of the flexibility characteristic of fibers. In other words, there were technical difficulties in increasing the amount of ceramic nanoparticles added to create fibers for knitting and weaving (handling). In other words, the inability to handle the fibers as fibers posed an application challenge.

[0015] The inventors of the present application have attempted to solve the above problems by taking a new approach rather than simply extending the conventional technology, and as a result have been able to disclose a power generating structure that achieves the above-mentioned main object.

[0016] The power-generating structure of the present disclosure will be described below. While the description will be made with reference to drawings as necessary, the contents of the drawings are merely schematic and illustrative for understanding the present disclosure, and the appearance, dimensional ratios, and the like may differ from the actual product. Note that, unless otherwise specified, various numerical ranges referred to in this specification are intended to include the lower and / or upper limit values ​​themselves. For example, a numerical range such as 1 to 10 can be interpreted as including both the lower limit of "1" and the upper limit of "10." Furthermore, various numerical values ​​may be accompanied by the terms "about" or "approximately," and these terms "about" and "approximately" mean that the range may include a variation of a few percent, for example, ±10%, ±5%, ±3%, ±2%, and / or ±1%.

[0017] [Power generating structure of the present disclosure] - First embodiment - The power generating structure 1 of the present disclosure includes a charged body 10 and a friction target body 20 that generates electricity when rubbed against the charged body 10. Each of the components will be described in detail below.

[0018] Charged Body The charged body 10 is composed of high-dielectric-constant fibers with a dielectric constant of 4.8 or higher. In this specification, "fiber" refers to a structural unit of thread, fabric, etc., and refers to a thin, long material with a sufficient length compared to its thickness. Furthermore, in this specification, "high dielectric constant" refers to a material with a dielectric constant of 4.8 or higher, and more preferably, a dielectric constant higher than that of resin (which generally has a dielectric constant of approximately 1 to 10). Furthermore, in this specification, "charged body" refers not only to an object that is positively or negatively charged in advance, but also to a structure that is not initially positively or negatively charged but can become positively or negatively charged due to friction.

[0019] The charged body 10 is preferably a woven fabric structure, as shown in FIG. 1 , which illustrates an example. The weave of the woven fabric structure is not particularly limited. Examples of the weave include three basic weaves such as plain weave, twill weave, and satin weave, a variation weave, a single double weave such as a warp double weave and a weft double weave, a full double weave, and warp velvet. Note that FIG. 1, which illustrates an example, illustrates a woven fabric structure with a plain weave weave.

[0020] The high dielectric constant fiber used in the charged body 10 may be made of any material as long as it has a dielectric constant of 4.8 or more. An example of the material of the high dielectric constant fiber is BaTiO ３ , PbTiO ３ , K. ０．５ Na ０．５ NbO ３ , Bi ０．５ Na ０．５ TiO ３ or an organic ferroelectric material such as polyvinylidene fluoride. Furthermore, even if a material has a dielectric constant of 4.8 or less, if it is mixed with a material having a dielectric constant of 4.8 or more, the material may be used if the overall dielectric constant of the material becomes 4.8 or more.

[0021] Here, a method for manufacturing the charged body of this embodiment will be described. The material of the high dielectric constant fiber constituting the charged body, which has a dielectric constant of 4.8 or more, is, for example, BaTiO ３ Alternatively, it may be a polyvinyl butyral resin.

[0022] First, a powder of perovskite oxide containing Ba, Ti, and O, each having a different crystal axial ratio (c / a axial ratio), is prepared. When the perovskite oxide powder is subjected to X-ray diffraction and Rietveld analysis, the crystal axial ratio is found to be approximately 1.0087.

[0023] The perovskite oxide powder, a binder resin, and an organic solvent are mixed to produce a ceramic paste. An example of the binder resin is a polyvinyl butyral binder resin. The organic solvent is toluene. An additive (e.g., a plasticizer) may be added when producing the ceramic paste.

[0024] The average particle size of the perovskite oxide powder may be approximately 50 nm to 150 nm. The ceramic paste may be prepared by mixing 2 to 90 parts by weight (1.3 to 60 parts by volume) of perovskite oxide, 10 to 98 parts by weight (40 to 98.7 parts by volume) of a polyvinyl butyral binder resin and a plasticizer, and an organic solvent. The ceramic paste can be prepared by dispersing this mixture using a ball mill.

[0025] The prepared ceramic paste is introduced into a spinning device and passed through the nozzle of the spinning device to produce high dielectric constant fibers. The diameter of the high dielectric constant fibers is not particularly limited, but is preferably 10 μm or more and 1000 μm or less.

[0026] After the high dielectric constant fiber described above is produced, the high dielectric constant fiber is plain woven. In the example shown in Figures 1 and 2, both the warp and weft yarns are high dielectric constant fibers having a dielectric constant of 4.8 or more. The upper limit of the dielectric constant is preferably about 800. The measurement of the dielectric constant will be described in detail in the Examples section below.

[0027] By using the above manufacturing method, it is possible to manufacture the charged body of the present disclosure.

[0028] Body to be frictioned The body to be frictioned 20 is a member that generates electric power when rubbed against the charged body 10. The body to be frictioned 20 shown in FIGS. 1 and 2 may be plate-shaped. The material of the body to be frictioned 20 may be any material, but it is preferable that the material has a work function different from the work function of the material of the charged body 10 in order to generate greater electric power through friction with the charged body 10. More preferably, when the work function of the charged body is large, the work function of the body to be frictioned is small, and when the work function of the charged body is large, the work function of the body to be frictioned is small. The greater the difference in work function between the charged body and the body to be frictioned, the better.

[0029] As a preferred embodiment of the friction target body 20, the friction target body 20 may contain a metal material. When the friction target body 20 contains a metal material, it can function as an electrode for extracting the electric power generated by friction with the charged body 10. Examples of the metal material include Cu, Pt, Ni, Au, Ag, Fe, Al, and Ti.

[0030] As described above, the power generating structure 1 includes the charged body 10 made of high-dielectric-constant fibers having a dielectric constant of 4.8 or more and the friction-target body 20 that generates electric power when rubbed against the charged body 10. Because the charged body 10 is made of high-dielectric-constant fibers, the surface of the charged body 10 has unevenness (see FIG. 2 ) compared to a plate-like structure, which increases the contact area with the friction-target body 20. Specifically, in the power generation mode (tapping mode) that occurs when the charged body 10 (or the friction-target body 20) is displaced vertically, the contact area can be increased by about 1.7 times compared to a plate-like structure. Furthermore, in the power generation mode (sliding mode) that occurs when the charged body 10 (or the friction-target body 20) is displaced horizontally, the contact area can also be increased by about 1.7 times.

[0031] Furthermore, since the high dielectric constant fiber has a dielectric constant of 4.8 or more, it is possible to increase the amount of electricity that can be stored in the charged body 10. As a result, it is possible to obtain a power generating structure with improved electrical properties.

[0032] Furthermore, by making the charged body 10 a woven structure having warp and weft threads, the structure of the charged body 10 can be specified more specifically, the contact area with the friction object 20 can be increased, and the electrical characteristics can be further improved.

[0033] In a preferred embodiment of the power generating structure, the fibers constituting the charged body 10 contain highly dielectric nanoparticles and an organic compound, and the volume fraction of the highly dielectric nanoparticles may be greater than 0% and less than 60% of the entire charged body. By adopting such an embodiment, it is possible to increase the amount of highly dielectric nanoparticles added and appropriately form the fibers while maintaining the flexibility characteristic of fibers.

[0034] In addition, as a preferred embodiment of the power generating structure, the aspect ratio (fiber diameter:fiber length) of the fibers constituting the charged body 10 is preferably 1:5 or more. More specifically, the fiber diameter / fiber length is preferably 0.2 or less. In short, the longer the fiber length, the better. By using such fibers, handling becomes easier and the woven structure can be appropriately manufactured.

[0035] In the above embodiment, both the warp and weft yarns used in the charged body 10 are described as high-dielectric fibers having a dielectric constant of 4.8 or more. However, instead of this embodiment of the charged body 10, one of the warp and weft yarns used in the charged body 10 may be a fiber containing a metal material, and the other may be a high-dielectric fiber having a dielectric constant of 4.8 or more. In other words, different materials may be used for the warp and weft yarns used in the charged body 10. By using such a charged body 10, the work function and / or dielectric constant of the charged body 10 can be appropriately designed, thereby further improving the electrical characteristics of the power generating structure 1.

[0036] Second Embodiment A second embodiment of the power generating structure of the present disclosure will be described with reference to Figures 3 to 7. The second embodiment differs from the first embodiment described above in the shape of the friction target. The other configurations are basically the same as those of the first embodiment described above. The different configurations will be described below.

[0037] Body to be Frictioned The body to be frictioned 20 in this embodiment may be made of fibers. More specifically, it may be in the form of a woven fabric. The weave of the body to be frictioned 20 is not particularly limited, and it may be the same weave as the charged body 10, or may be a different weave from the charged body 10. In Fig. 3, which shows an example, both the body to be frictioned 20 and the charged body 10 are shown as plain weave.

[0038] The material of the friction object 20 may be metallic or non-metallic, as long as it has a work function different from that of the material of the charged object 10. In order to function as an electrode for extracting the electric power generated by friction with the charged object 10, the friction object 20 may be made of metal fiber, and the metal fiber may be used as a woven fabric.

[0039] In this power generating structure, both the friction object 20 and the charged object 10 contain fibers, and uneven surfaces are formed on both (see FIG. 4 ), which further increases the contact area between the friction object 20 and the charged object 10. This allows for further improvement in the electrical properties of the power generating structure 1.

[0040] - Variation 1 - As a variation 1 of the power generating structure of the second embodiment, the frictional body 20 may be a structure in which resin fibers 20a are coated with metal. That is, the structure may be such that threads are formed by bundling resin fibers, and the periphery of the threads is coated with metal fibers. The resin fibers are not particularly limited, but examples include polyethylene, polypropylene, polystyrene, and polyester terephthalate. The metal coating the periphery of the resin fibers is not particularly limited, but examples include Cu, Pt, Ni, Au, Ag, Fe, Al, and Ti.

[0041] By adopting such a configuration, the work function and / or the dielectric constant of the friction object 20 can be appropriately designed, and the electrical characteristics of the power generating structure 1 can be further improved.

[0042] Instead of the above-mentioned configuration, the friction object 20 may have a structure in which metal fibers are coated with resin, which can provide the same effect. Furthermore, the charged object 10 may have a structure in which metal fibers are coated with resin, or a structure in which resin fibers are coated with metal.

[0043] - Variation 2 - As a variation 2 of the power generating structure of the second embodiment, the charged body 10 may have either the warp yarns 11 or the weft yarns 12 made of fibers containing a metal material, and the other made of a highly dielectric fiber with a dielectric constant of 4.8 or higher. Furthermore, the friction target body 20 may have either the warp yarns 21 or the weft yarns 22 made of fibers containing a metal material, and the other made of fibers containing a resin. When the friction target body 20 and the charged body 10 are placed face to face, the fibers containing a metal material of the charged body 10 and the fibers containing a metal material of the friction target body 20 may be arranged alternately.

[0044] The term "alternate" as used herein refers to a structure in which, when the charged body 10 and the friction-target body 20 are placed opposite each other, the warp threads 11 of the charged body 10 and the weft threads 22 of the friction-target body 20 periodically move closer to and farther away from each other. From another perspective, it refers to a structure in which, when the charged body 10 (or the friction-target body 20) is displaced horizontally (in the case of power generation in sliding mode), the warp threads 11 of the charged body 10 move closer to the warp threads 21 of the friction-target body 20 as they move away from the weft threads 22 of the friction-target body 20.

[0045] Here, we consider the power generation principle of the power generation structure of Modification 2. In the sliding mode in which the charged body 10 and the friction-target body 20 are displaced horizontally, region A ( FIG. 7A ), where the warp yarns 11 of the charged body 10 face the weft yarns 22 of the friction-target body 20, transitions due to friction to region B in FIG. 7 where the weft yarns 12 of the charged body 10 face the weft yarns 22 of the friction-target body 20. In other words, the yarns containing high-dielectric-constant fibers in the charged body 10 can be worn away with a small displacement L ( FIG. 7B ). In the sliding mode of friction-based power generation, the maximum amount of power can be generated by wearing away the high-dielectric-constant fibers. Therefore, by using a configuration like that of Modification 2, power can be generated efficiently with a small displacement.

[0046] Third Embodiment A third embodiment of the power generating structure of the present disclosure will be described with reference to Fig. 8. The third embodiment differs from the power generating structures of the first and second embodiments in that an electrode 30 is disposed so as to sandwich the charged body 10 and the friction target body 20.

[0047] The electrode 30 functions as an electrode for extracting the electric power generated by friction. Examples of the electrode 30 include Cu, Pt, Ni, Au, Ag, Fe, Al, and Ti. According to the power generating structure of the third embodiment, the electrode 30 sandwiching the charged body 10 and the friction target body 20 can appropriately extract the electric power generated by friction.

[0048] [Evaluation of Dielectric Constant and Remanent Polarization] To evaluate materials that can provide charging properties, the dielectric constant and remanent polarization of perovskite oxides containing Ba, Ti, and O were evaluated. Note that since it is difficult to evaluate the electrical properties of the perovskite oxides used for evaluation in fibrous form, a measurement sample was prepared by molding the BTO ceramic paste into a film using a dip coater and applying a metal consisting of indium and gallium to the front and back surfaces of the film. The measurement sample was as follows:

[0049] Charged body of measurement sample 1: Perovskite-type oxide: 0 parts by weight, Polyvinyl butyral-based binder resin and plasticizer: 100 parts by weight Charged body of measurement sample 2: Perovskite-type oxide: 16 parts by weight, Polyvinyl butyral-based binder resin and plasticizer: 84 parts by weight Charged body of measurement sample 3: Perovskite-type oxide: 24 parts by weight, Polyvinyl butyral-based binder resin and plasticizer: 76 parts by weight Charged body of measurement sample 4: Perovskite-type oxide: 35 parts by weight, Polyvinyl butyral-based binder resin and plasticizer: 65 parts by weight Charged body of measurement sample 5: Perovskite-type oxide: 45 parts by weight, Polyvinyl butyral-based binder resin and plasticizer: 55 parts by weight Charged body of measurement sample 6: Perovskite-type oxide: 90 parts by weight Polyvinyl butyral binder resin and plasticizer: 10 parts by weight

[0050] The dielectric constant of the measurement sample was evaluated by applying an AC voltage of 1 V, 1 kHz at room temperature (25°C) using an LCR meter (manufactured by Huwlett-Packard, model number: 4284A) to measure the dielectric constant of the film.

[0051] Furthermore, the remanent polarization of the measurement sample was evaluated. The remanent polarization was evaluated by measuring the P-E hysteresis loop with a ferroelectric evaluation device (manufactured by RADIANT, model number: Precision Premier II) and calculating the remanent polarization (μC / cm) at an electric field of 0 V / mm. ２ ) was evaluated.

[0052] The results of the dielectric constant and remanent polarization for measurement samples 1 to 6 are shown below. Also, a graph showing the relationship between the dielectric constant and the volume fraction is shown in FIG.

[0053] According to the above evaluation results, the dielectric constant was 4.8 or more for the above-mentioned measurement sample in which the perovskite oxide was more than 0% and not more than 60% of the total.

[0054] Furthermore, according to the above evaluation results, the absolute value of the remanent polarization was 0.6 μC / cm ２ The above results were obtained.

[0055] [Evaluation of electrical characteristics of power generation structure] - Evaluation of electrical characteristics in tapping mode Electrical characteristics in tapping mode were measured using a multimeter (Keysight Corporation, model number: 34420A). A robot arm was used to bring the charged body and the rubbed body into contact at a speed of 1 cm / s.

[0056] According to the above-mentioned Patent Document 1, when two copper electrodes are formed on the front and back surfaces of a charged body and a current is detected through these copper electrodes, the current density output from the charged body is 0.08 μA / cm ２ According to the above-mentioned Non-Patent Document 1, when two copper electrodes are formed on the front and back surfaces of a charged body and a current is detected through these copper electrodes, the current density output from the charged body is 6.5 μA / cm ２ It can be understood that

[0057] On the other hand, high dielectric constant fibers were produced by a spinning device from the charging materials corresponding to the above-mentioned measurement samples 1 to 6, and the current density of a power generating structure equipped with a charging body made of plain woven high dielectric constant fibers was 84 μA / cm in tapping mode. ２ The current density was calculated by dividing the generated current value by the apparent contact area between the "plain woven fabric of high dielectric constant inorganic ceramic and resin fibers and copper fibers." Therefore, the power generating structure of the present disclosure achieved a current density 1000 times higher than that of the power generating structure described in Patent Document 1, and a current density 14 times higher than that of the power generating structure described in Non-Patent Document 1.

[0058] - Evaluation of electrical characteristics in sliding mode The electrical characteristics in sliding mode were measured using a multimeter (Keysight Corporation, model number: 34420A). A robot arm was used to slide the charged body and the body to be rubbed at a speed of 1 cm / s.

[0059] The above-mentioned Non-Patent Document 2 discloses a structure in which PTFE (polytetrafluoroethylene) is used as a first charged body, a copper electrode is formed on the rear surface of the first charged body, and Al is used as a second charged body on the first charged body. The current density output from the structure described in Non-Patent Document 1 is 2.7 μA / cm ２ It can be understood that

[0060] On the other hand, the current density of the power generating structure including the charging material corresponding to the above-mentioned measurement samples 1 to 6 was 2872 μA / cm in the sliding mode. ２ The current density was calculated by dividing the generated current value by the apparent contact area between the "plain woven fabric of high dielectric constant inorganic ceramic and resin fibers and copper fibers." Therefore, the power generating structure of the present disclosure achieved a current density 1000 times higher than that of the power generating structure described in Non-Patent Document 2.

[0061] The power generating structure of the present disclosure includes the following aspects. <1> A power generating structure comprising: a charged body made of high-dielectric-constant fibers having a dielectric constant of 4.8 or more; and a friction-bearing body that generates electricity when rubbed against the charged body. <2> The power generating structure according to <1>, in which the charged body is a woven structure. <3> The power generating structure according to <1> or <2>, in which the friction-bearing body comprises a metal material. <4> The power generating structure according to any one of <1> to <3>, in which the friction-bearing body is made of fibers. <5> The power generating structure according to any one of <1> to <4>, in which the friction-bearing body is either a structure in which metal fibers are coated with resin, or a structure in which resin fibers are coated with metal. <6> The power generating structure according to any one of <1> to <5>, in which one of the warp and weft threads of the charged body is a fiber containing a metal material, and the other is a high-dielectric fiber with a dielectric constant of 4.8 or more. <7> The power generating structure according to <6>, wherein one of the warp and weft threads of the friction object is a fiber containing a metal material, and the other is a fiber containing a resin, and in the power generating structure where the friction object and the charged object face each other, the fibers containing the metal material of the charged object and the fibers containing the metal material of the friction object are arranged alternately. <8> The power generating structure according to any one of <1> to <7>, wherein electrodes are arranged to sandwich the charged object and the friction object. <9> The power generating structure according to any one of <1> to <8>, wherein the fibers constituting the charged object contain high dielectric nanoparticles and an organic compound, and the volume fraction of the high dielectric nanoparticles is greater than 0% and less than or equal to 60% of the entire charged object. <10> The absolute value of the remanent polarization of the fibers constituting the charged object is 0.6 μC / cm ２ <11> The power generating structure according to any one of <1> to <10>, wherein the aspect ratio (fiber diameter:fiber length) of the fibers constituting the charged body is 1:5 or more.

[0062] It should be noted that the embodiments disclosed herein are illustrative in all respects and are not intended to be limiting. Therefore, the technical scope of the present disclosure should not be interpreted solely by the above-described embodiments, but should be defined based on the claims. The technical scope of the present disclosure also includes all modifications within the scope and meaning equivalent to the claims.

[0063] The present disclosure can be used for power generation structures capable of generating electricity. More specifically, it can be applied to the battery field. In particular, since it is not necessary to replace the battery to drive the device, it is expected to be used in places where battery replacement is difficult. Furthermore, since it can detect current and voltage, it can be applied to the sensor field for detecting mechanical force.

[0064] REFERENCE SIGNS LIST 1 power generating structure 10 charged body 11 warp thread 12 weft thread 20 friction target body 20a resin fiber 21 warp thread 22 weft thread 30 electrode

Claims

1. a charged body made of high dielectric constant fibers having a dielectric constant of 4.8 or more; a friction object that generates electricity when rubbed against the charged object; and The power generating structure, wherein the friction object is either a structure in which metal fibers are coated with resin, or a structure in which resin fibers are coated with metal.

2. a charged body made of high dielectric constant fibers having a dielectric constant of 4.8 or more; a friction object that generates electricity when rubbed against the charged object; and the charged body is a fiber in which one of the warp and weft yarns contains a metal material, and the other is a high-dielectric fiber with a dielectric constant of 4.8 or more; The friction object is a fiber in which one of warp yarns and weft yarns contains a metal material, and the other contains a resin, In the power generating structure in which the friction object and the charged object face each other, the fibers containing the metal material of the charged object and the fibers containing the metal material of the friction object are arranged alternately.

3. a charged body made of high dielectric constant fibers having a dielectric constant of 4.8 or more; a friction object that generates electricity when rubbed against the charged object; and A power generating structure, wherein the fibers constituting the charged body contain highly dielectric nanoparticles and an organic compound, and the volume fraction of the highly dielectric nanoparticles is greater than 0% and not more than 60% of the entire charged body.

4. The power generating structure according to any one of claims 1 to 3, wherein the charged body is a woven fabric structure.

5. 4. The power generating structure according to claim 1, wherein the friction object comprises a metal material.

6. 4. The power generating structure according to claim 1, wherein the friction object is made of fiber.

7. 4. The power generating structure according to claim 2, wherein the friction body is either a structure in which metal fibers are coated with resin or a structure in which resin fibers are coated with metal.

8. 4. The power generating structure according to claim 1, wherein one of the warp and weft threads of said charged body is a fiber containing a metal material, and the other is a highly dielectric fiber having a dielectric constant of 4.8 or more.

9. The friction object is a fiber in which one of warp yarns and weft yarns contains a metal material, and the other contains a resin, 9. The power generating structure according to claim 8, wherein in the power generating structure in which the friction object and the charged object face each other, fibers containing the metal material of the charged object and fibers containing the metal material of the friction object are arranged alternately.

10. 4. The power generating structure according to claim 1, wherein electrodes are arranged to sandwich the charged body and the body to be rubbed.

11. 3. The power generating structure according to claim 1, wherein the fibers constituting the charged body contain highly dielectric nanoparticles and an organic compound, and the volume fraction of the highly dielectric nanoparticles is greater than 0% and not more than 60% of the total charged body.

12. The absolute value of the remanent polarization of the fibers constituting the charged body is 0.6 μC / cm ２ The power generating structure according to any one of claims 1 to 3, wherein:

13. 4. The power generating structure according to claim 1, wherein the aspect ratio (fiber diameter:fiber length) of the fibers constituting the charged body is 1:5 or more.