Self power generated umbrella and the manufacturing method thereof

Abstract

The present invention relates to a self-generating umbrella, and more specifically, comprises a first umbrella fabric having a first electrode formed on one surface, a second umbrella fabric having a second electrode formed on one surface, a friction member formed on at least one surface of the first electrode and the second electrode, and a spacer formed on the friction member having a predetermined height, wherein the first electrode and the second electrode comprise at least one material selected from graphene and graphite.

Description

Technology Field

[0001] The present invention relates to a self-generating umbrella and a method for manufacturing the same. More specifically, it relates to a self-generating umbrella and a method for manufacturing the same, wherein an electrode containing at least one of graphene and graphite is formed on an umbrella fabric made of a highly flexible woven material to generate a large triboelectric charge, thereby having high power generation efficiency. Background Technology

[0003] Recently, there has been active technological development related to energy harvesting. Energy harvesting refers to the process of collecting energy generated from the environment and converting it into electrical energy. One field within energy harvesting is triboelectric nanogenerator (TENG) technology. TENG technology refers to the generation of electrical energy by utilizing the electrostatic phenomenon that occurs when two different materials come into contact and then separate. Through this, mechanical energy can be converted into electrical energy to produce power. TENG technology can be used to supply power to small-scale electronic devices or sensors.

[0004] However, conventional triboelectric generators used metal electrodes, but since metal electrodes are difficult to attach to flexible materials such as fabrics, there was a problem in that the materials or items to which the triboelectric generator could be applied were inevitably limited. Prior art literature

[0006] Registered Utility Model Publication No. 20-0454032 (June 20, 2011) The problem to be solved

[0007] The present invention has been devised to solve the problems described above. The objective of the self-generating umbrella and the method for manufacturing the same according to the present invention is to provide a self-generating umbrella and a method for manufacturing the same that can produce power through triboelectric charging with high efficiency by forming an electrode comprising at least one of graphene and graphite on each of two sheets of umbrella fabric, and arranging a friction member and a spacer that separates the friction member and the electrode so that a large triboelectric charge can be generated. means of solving the problem

[0009] In order to solve the problem described above, a self-generating umbrella according to one embodiment of the present invention comprises a first umbrella fabric having a first electrode formed on one surface, a second umbrella fabric having a second electrode formed on one surface, a friction member formed on at least one surface of the first electrode and the second electrode, and a spacer formed on the friction member and having a predetermined height, wherein the first electrode and the second electrode comprise at least one material selected from graphene and graphite.

[0010] In addition, each of the first electrode and the second electrode comprises a polymer material, and the polymer material comprises either polydimethylsiloxane (PDMS) or polytetrafluoroethylene (PTFE).

[0011] In addition, the spacer is characterized by having a spherical shape.

[0012] In addition, the surface of the spacer is characterized by having irregularities formed thereon.

[0013] In addition, at least a portion of the spacer is characterized by being porous.

[0014] In addition, at least a portion of the surface of the spacer is characterized by being formed of a hierarchical nanostructure.

[0015] In addition, it is characterized by further including a rectifier connected to a first electrode and a second electrode, a light-emitting device comprising at least one light-emitting element, and a switch having one side connected to the rectifier and the other side connected to the light-emitting device.

[0016] A method for manufacturing a self-generating umbrella according to one embodiment of the present invention is characterized by comprising a preparation step (S1) for preparing first and second umbrella fabrics, an electrode forming step (S2) for forming first and second electrodes on each of the first and second umbrella fabrics, and an assembly step (S4) for assembling the first and second umbrella fabrics to an umbrella body.

[0017] Additionally, the electrode formation step (S2) is characterized by including a coating step (S2-1) of applying a composite material comprising at least one of graphene and graphite and a predetermined polymer material to each of the first and second umbrella fabrics, and a drying step (S2-2) of drying the first and second umbrella fabrics in an environment of 25 degrees or more and 60 degrees or less.

[0018] In addition, the polymer material is characterized as being either polydimethylsiloxane (PDMS) or polytetrafluoroethylene (PTFE).

[0019] Additionally, the method is characterized by including a friction member forming step (S3-1) for forming a friction member on the surface of at least one of the first and second electrodes after the electrode forming step (S2) and before the assembly step (S4), and a spacer forming step (S3-2) for forming a spacer on the surface of the friction member. Effects of the invention

[0021] According to the self-generating umbrella and the method for manufacturing the same according to the present invention as described above, by applying a composite material comprising at least one of graphene and graphite as an electrode, the electrode can be formed regardless of the surface conditions of the object, unlike conventional metal electrodes, thus providing the effect of being able to apply a triboelectric generator to a fabric material with a rough surface and high flexibility.

[0022] In addition, since the electrode is formed using a composite material comprising at least one of graphene and graphite and a predetermined polymer material, it can simultaneously perform the roles of an electrode and a charged body; as a result, the manufacturing process is reduced, which has the effect of reducing manufacturing costs. Brief explanation of the drawing

[0024] FIG. 1 illustrates a self-generating umbrella according to the present invention. FIG. 2 shows a cross-sectional view of an umbrella fabric assembly included in a self-generating umbrella according to a first embodiment of the present invention. Figure 3 illustrates the charge series in a polymer material. FIG. 4 shows a cross-sectional view of an umbrella fabric assembly included in a self-generating umbrella according to a second embodiment of the present invention. FIG. 5 shows a cross-sectional view of an umbrella fabric assembly included in a self-generating umbrella according to a third embodiment of the present invention. Figure 6 illustrates a charging and discharging circuit. FIG. 7 illustrates a method for manufacturing a self-generating umbrella according to the present invention. Specific details for implementing the invention

[0025] The objects, features, and advantages of the present invention described above will become more apparent through the following embodiments in connection with the accompanying drawings. The specific structural or functional descriptions below are merely illustrative for the purpose of explaining embodiments according to the concept of the present invention, and embodiments according to the concept of the present invention may be implemented in various forms and should not be interpreted as being limited to the embodiments described in this specification or application. Since embodiments according to the concept of the present invention may be subject to various modifications and may take various forms, specific embodiments are illustrated in the drawings and described in detail in this specification or application. However, this is not intended to limit embodiments according to the concept of the present invention to specific disclosed forms, and should be understood to include all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention. Terms such as "first" and / or "second" may be used to describe various components, but the components are not limited to these terms. Terms may be used solely for the purpose of distinguishing one component from another, for example, without departing from the scope of rights according to the concept of the present invention, such that a first component may be named a second component, and similarly, a second component may be named a first component. When it is stated that a component is connected to or coupled with another component, it should be understood that it may be directly connected to or coupled with that other component, or that there may be other components in between. On the other hand, when it is stated that a component is directly connected to or directly coupled with another component, it should be understood that there are no other components in between. Other expressions used to describe the relationships between components, such as "between," "immediately between," "adjacent to," and "directly adjacent to," should be interpreted in the same way.The terms used in this specification are used merely to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. Terms such as "include" or "have" in this specification are intended to indicate the existence of the described features, numbers, steps, actions, components, parts, or combinations thereof, and should not be understood as precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this specification. The invention will be described in detail below by describing preferred embodiments of the invention with reference to the accompanying drawings. Identical reference numerals in each drawing indicate identical components.

[0026] A preferred embodiment of the self-generating umbrella (1) and the method of manufacturing the same according to the present invention will be described in detail below with reference to the attached drawings.

[0027] The self-generating umbrella (1) of the present invention will be described.

[0028] Figure 1 illustrates a self-generating umbrella (1) according to the present invention.

[0029] The self-generating umbrella (1) according to the present invention includes an umbrella fabric assembly (110), a charging / discharging circuit (120), an umbrella body (130), and an umbrella handle (140).

[0030] The umbrella fabric assembly (110) is provided in the self-generating umbrella (1) to protect the user from rain.

[0031] The charging / discharging circuit (120) stores power produced by the umbrella fabric assembly (110) and discharges it through the light-emitting device (122). Specifically, the charging / discharging circuit (120) may be connected to the umbrella fabric assembly (110) and provided within the umbrella handle (140) or umbrella body (130).

[0032] The umbrella body (130) supports the umbrella fabric assembly (110).

[0033] The umbrella handle (140) is provided at one end of the umbrella body (130), and a switch (123) included in the charging / discharging circuit (120) protrudes to the outside of the umbrella handle (140). Accordingly, the user can operate the switch (123) provided in the umbrella handle (140).

[0034] FIG. 2 is a cross-sectional view of an umbrella fabric assembly (110) included in a self-generating umbrella (1) according to the first embodiment of the present invention.

[0035] The umbrella fabric assembly (110) includes a first umbrella fabric (111), a second umbrella fabric (112), a first electrode (113), a second electrode (114), a friction member (115), and a spacer (116).

[0036] The first umbrella cloth (111) is characterized by having a first electrode (113), which is an electrode, formed on one side. Additionally, the second umbrella cloth (112) is characterized by having a second electrode (114), which is an electrode, formed on one side. Specifically, the first and second umbrella cloths (111, 112) may be fabrics. Accordingly, the material of the first and second umbrella cloths (111, 112) may be a woven fabric such as nylon, polyester, Teflon-coated fabric, PVC, cotton, and microfiber.

[0037] The first electrode (113) and the second electrode (114) are characterized by comprising at least one material among graphene and graphite. Specifically, the first electrode (113) is formed on one side of the first umbrella cloth (111) and comprises a composite material comprising at least one material among graphene and graphite and a predetermined polymer material. The second electrode (114) is formed on one side of the second umbrella cloth (112) and, like the first electrode (113), comprises a composite material comprising at least one material among graphene and graphite and a predetermined polymer material.

[0038] For example, a composite material comprising at least one of graphene and graphite and a predetermined polymer material can be applied to the first and second umbrella fabrics (111, 112) using an application or printing method such as a doctor blade or screen printing.

[0039] Graphene and graphite are carbon compounds with high electrical conductivity and excellent flexibility. Therefore, when the first and second electrodes (113, 114) are composed of a composite material containing at least one of graphene and graphite, the composite material can be used as an electrode because of its high electrical conductivity, and at the same time, the charge density due to triboelectricity can be increased, so it can be used simultaneously as an electrode and a charged body.

[0040] In addition, the conductivity of the first and second electrodes (113, 114) can be varied by controlling the amount of at least one material among graphene and graphite included in the first and second electrodes (113, 114) using the above characteristics.

[0041] Figure 3 illustrates the charging series in polymer materials. The charging series in Figure 3 shows materials arranged according to their tendency to carry a relatively positive or negative charge when electrically charged; materials are more likely to carry a relatively positive charge towards the upper left and a relatively negative charge towards the lower right.

[0042] As described above, the first electrode (113) and the second electrode (114) each comprise a polymer material, and the polymer material is characterized by comprising either polydimethylsiloxane (PDMS) or polytetrafluoroethylene (PTFE). Specifically, the polymer material included in each of the first electrode (113) and the second electrode (114) may include at least one material among graphene and graphite as described above. The polymer material may be a material capable of being charged with a negative charge and may comprise either polydimethylsiloxane (PDMS) or polytetrafluoroethylene (PTFE).

[0043] However, materials that can be used as polymer materials are not limited to polydimethylsiloxane (PDMS) and polytetrafluoroethylene (PTFE), and materials that have a stronger tendency to be charged with a negative charge than the material constituting the friction member (115) described later may be applied.

[0044] In conclusion, when at least one of graphene and graphite is added to a polymer material to form the first and second electrodes (113, 114), the electrical conductivity of the first and second electrodes (113, 114) is increased, so they can be used as electrodes, and at the same time, the charge density due to triboelectricity can be increased, so there is an effect that they can be used as charged bodies in power generation using triboelectricity.

[0045] In addition, unlike conventional metal electrodes, electrodes can be formed regardless of the surface conditions of the object, which offers the advantage of enabling the application of triboelectric generators to fabric materials that are rough in surface and highly flexible.

[0046] The friction member (115) is characterized by being formed on the surface of at least one of the first electrode (113) and the second electrode (114). Specifically, the friction member (115) may be formed by applying it to the surface of at least one of the first electrode (113) and the second electrode (114).

[0047] For example, the friction member (115) can also be applied using a coating or printing method such as a doctor blade or screen printing, just like the first and second umbrella cloths (111, 112).

[0048] The friction member (115) may include a material that has a stronger tendency to be charged with a positive charge than the polymer material included in the first electrode (113) and the second electrode (114). Specifically, referring to FIG. 3, the friction member (115) may include a material that has a stronger tendency to be charged with a positive charge than the polymer material included in each of the first electrode (113) and the second electrode (114). In addition, by utilizing the above characteristics, the amount of power produced by the self-generating umbrella (1) can be varied by selecting the material included in the friction member (115).

[0049] For example, the friction member (115) may include a material that has a stronger tendency to be positively charged than either polydimethylsiloxane (PDMS) or polytetrafluoroethylene (PTFE).

[0050] Accordingly, referring to FIG. 3, the friction member (115) is made of polyformaldehyde 1.3-1.4, ethylcellulose, polyamide 11, polyamide 6-6, melamine formaldehyde, knitted wool, woven silk, aluminum, paper, woven cotton, steel, wood, hard rubber, nickel-copper, sulfur, brass-silver, acetate rayon, polymethyl methacrylate (Lucite), polyvinyl alcohol, polyester (Dacron), polyisobutylene, polyurethane flexible sponge, and polyethylene. It may include any one of the following materials: polyethylene terephthalate, polyvinyl butyral, polychlorobutadiene, natural rubber, polyacrylonitrile, acrylonitrile-vinyl chloride, polybisphenol carbonate, polychloroether, polyvinylidene chloride (Saran), polystyrene, polyethylene, polyimide, and polyvinyl chloride (PVC).

[0051] In conclusion, the first electrode (113) and the second electrode (114) include a material having a strong tendency to be charged with a negative charge, and the friction member (115) includes a material having a stronger tendency to be charged with a positive charge than the material included in the first electrode (113) and the second electrode (114), so that the amount of charge due to triboelectric charging can be maximized.

[0052] The spacer (116) is formed on the friction member (115) and is characterized by having a predetermined height. Specifically, referring to FIG. 2, the spacer (116) is formed on the surface of the friction member (115) to have a predetermined height and separates the friction member (115) from the electrode located opposite it.

[0053] The material of the spacer (116) may be inorganic or organic. Specifically, the spacer (116) may be made of a metal oxide, nitride, boride, etc., which has insulating properties such as titanium dioxide (TiO2) and zinc oxide (ZnO). In addition, the spacer (116) may be made of a polymer material such as polystyrene.

[0054] The spacer (116) is characterized by having a spherical shape. Specifically, referring to FIG. 2, a spacer (116) having a spherical shape is formed on the surface of the friction member (115). Through this, a space is formed between the friction member (115) and the electrode where the friction member (115) is not formed.

[0055] The surface of the spacer (116) is characterized by having irregularities formed thereon. Specifically, the irregularities may be formed on the surface of the spacer (116) in a convex or concave shape. However, the shape of the irregularities is not limited to that described in this specification and may have various shapes.

[0056] FIG. 4 is a cross-sectional view of the umbrella fabric included in the self-generating umbrella (1) according to the second embodiment of the present invention.

[0057] At least a portion of the spacer (116) is characterized by being porous. Specifically, referring to FIG. 4, at least a portion of the spacer (116) may have multiple through holes formed therein. As a result, the surface area increases, so there is an effect of increasing the amount of charge due to triboelectric charging.

[0058] FIG. 5 is a cross-sectional view of the umbrella fabric included in the self-generating umbrella (1) according to the third embodiment of the present invention.

[0059] At least a portion of the surface of the spacer (116) is characterized by being formed of a hierarchical nanostructure. Specifically, referring to FIG. 5, a hierarchical nanostructure can be formed on the surface of the spacer (116) in which structural features are repeatedly arranged on a nanometer to micrometer scale. As a result, the surface area increases, as in the case where at least a portion of the spacer is porous, and thus the amount of charge due to triboelectricity increases.

[0060] However, the shape of the spacer (116) may have different embodiments in combinations as follows, in addition to the above embodiment.

[0061] In one embodiment, the spacer (116) is spherical in shape, and irregularities may be formed on the surface of the spacer (116).

[0062] In one embodiment, the spacer (116) is spherical in shape, and at least a portion of the spacer (116) may be porous.

[0063] In one embodiment, the spacer (116) is spherical in shape, and at least a portion of the surface of the spacer (116) may be formed of a hierarchical nanostructure.

[0064] In one embodiment, the spacer (116) may be spherical in shape, and at least a portion of the spacer (116) may be porous, and irregularities may be formed on the surface of the spacer (116).

[0065] In one embodiment, the spacer (116) may be spherical in shape, and at least a portion of the spacer (116) may be porous, and at least a portion of the surface of the spacer (116) may be formed as a hierarchical nanostructure.

[0066] In one embodiment, the spacer (116) is spherical in shape, and irregularities may be formed on the surface of the spacer (116), and at least a portion of the surface of the spacer (116) may have a hierarchical nanostructure formed thereon.

[0067] In one embodiment, the spacer (116) may be spherical in shape, and at least a portion of the spacer (116) may be porous, and irregularities may be formed on the surface of the spacer (116), and at least a portion of the surface of the spacer (116) may have a hierarchical nanostructure formed thereon.

[0068] In one embodiment, at least a portion of the spacer (116) may be porous, and irregularities may be formed on the surface of the spacer (116).

[0069] In one embodiment, at least a portion of the spacer (116) may be porous, and at least a portion of the surface of the spacer (116) may be formed of a hierarchical nanostructure.

[0070] In one embodiment, at least a portion of the spacer (116) may be porous, irregularities may be formed on the surface of the spacer (116), and at least a portion of the surface of the spacer (116) may have a hierarchical nanostructure formed thereon.

[0071] In one embodiment, irregularities may be formed on the surface of the spacer (116), and at least a portion of the surface of the spacer (116) may have a hierarchical nanostructure formed thereon.

[0072] That is, the structure and surface of the spacer (116) can be formed in various structures to increase the amount of charge due to triboelectricity. Through this, there is an effect of inducing an additional amount of charge from triboelectricity.

[0073] Figure 6 illustrates a charging / discharging circuit (120).

[0074] The charging / discharging circuit (120) includes a rectifier (121), a light-emitting device (122), and a switch (123).

[0075] The rectifier (121) is characterized by being connected to the first electrode (113) and the second electrode (114). Specifically, the input terminal of the rectifier (121) is connected to the first electrode (113) and the second electrode (114), respectively. Accordingly, power generated by friction between the friction member (115) and the electrode is input to the rectifier (121) through the first electrode (113) and the second electrode (114). The rectifier (121) can rectify the power received from the first electrode (113) and the second electrode (114) into a DC voltage and output it.

[0076] For example, the rectifier (121) may include a diode bridge circuit composed of a plurality of diodes and a capacitor (C) connected to the diode bridge circuit. Specifically, power received from the first electrode (113) and the second electrode (114) can be rectified through the diode bridge circuit and stored in the capacitor (C).

[0077] The capacitor (C) can discharge power charged through the diode bridge circuit via natural discharge. Specifically, when the first and second electrodes (113, 114) continuously generate power, the capacitor (C) is continuously charged through the diode bridge circuit, but since natural discharge occurs within the capacitor (C), the risk of overcharging is significantly lower, and the generated power can be stored only when necessary.

[0078] The light-emitting device (122) is characterized by including at least one light-emitting element. Specifically, the light-emitting device (122) is connected to a rectifier (121) and receives power supplied from the rectifier (121) to operate at least one light-emitting element. As an example, the light-emitting element may be an LED. Referring to FIG. 1, the light-emitting device (122) may be provided at the other end of the umbrella body (130).

[0079] The switch (123) is characterized by having one side connected to the rectifier (121) and the other side connected to the light-emitting device (122). Specifically, the switch (123) is provided on the umbrella handle (140) and selectively allows the rectifier (121) and the light-emitting device (122) to be connected, thereby enabling the user to easily operate the light-emitting device (122).

[0080] FIG. 7 illustrates a method for manufacturing a self-generating umbrella (1) according to the present invention.

[0081] The method for manufacturing the self-generating umbrella (1) of the present invention is described. While describing the method for manufacturing the self-generating umbrella (1) of the present invention, any content that overlaps with the self-generating umbrella (1) of the present invention is omitted.

[0082] The method for manufacturing a self-generating umbrella (1) according to the present invention is characterized by comprising a preparation step (S1) of preparing first and second umbrella fabrics (111, 112), an electrode forming step (S2) of forming first and second electrodes (113, 114) on each of the first and second umbrella fabrics (111, 112), and an assembly step (S4) of assembling the first and second umbrella fabrics (111, 112) to an umbrella body (130).

[0083] The preparation step (S1) is characterized by preparing the first and second umbrella fabrics (111, 112). The first and second umbrella fabrics (111, 112) may be woven fabrics such as nylon, polyester, Teflon-coated fabric, PVC, cotton, or microfiber, as described above.

[0084] The electrode formation step (S2) is characterized by forming first and second electrodes (113, 114) on each of the first and second umbrella fabrics (111, 112). Specifically, the electrode formation step (S2) includes a coating step (S2-1) and a drying step (S2-2).

[0085] The coating step (S2-1) is characterized by applying a composite material comprising at least one of graphene and graphite and a predetermined polymer material to each of the first and second umbrella fabrics (111, 112). Specifically, in the coating step, the composite material comprising at least one of graphene and graphite and a predetermined polymer material may be applied to the first and second umbrella fabrics (111, 112) using a coating or printing method such as a doctor blade or screen printing.

[0086] Here, the polymer material is characterized as being either polydimethylsiloxane (PDMS) or polytetrafluoroethylene (PTFE). As described above, polydimethylsiloxane (PDMS) and polytetrafluoroethylene (PTFE), which have a strong tendency to be charged with a negative charge when rubbed against other materials, may be applied as the polymer material included in the first electrode (113) and the second electrode (114).

[0087] The drying step (S2-2) is characterized by drying the first and second umbrella fabrics (111, 112) in an environment of 25 degrees Celsius or higher and 60 degrees Celsius or lower. Specifically, in the drying step, the first and second umbrella fabrics (111, 112) coated with a composite material can be dried in an environment of 25 degrees Celsius or higher and 60 degrees Celsius or lower. Through this, the composite material can be attached to the first and second umbrella fabrics (111, 112).

[0088] The method is characterized by including a friction member forming step (S3-1) for forming a friction member (115) on the surface of at least one of the first and second electrodes (113, 114) after the electrode forming step (S2) and before the assembly step (S4), and a spacer forming step (S3-2) for forming a spacer (116) on the surface of the friction member (115). Since the description of the friction member (115) and the spacer (116) has been described above, a detailed description is omitted.

[0089] The assembly step (S4) is characterized by assembling the first and second umbrella fabrics (111, 112) to the umbrella body (130). Specifically, in the assembly step (S4), the first and second umbrella fabrics (111, 112) are overlapped so that the electrode with the friction member (115) formed among the first and second electrodes (113, 114) and the electrode without the friction member (115) formed face each other, and then the first and second umbrella fabrics (111, 112) are assembled to the umbrella body (130) to manufacture the self-generating umbrella (1) of the present invention.

[0090] The technical concept of the present invention should not be interpreted as being limited to the above-described embodiments. Not only is the scope of application diverse, but various modifications are possible at the level of a person skilled in the art without departing from the essence of the invention claimed in the claims. Accordingly, such improvements and modifications fall within the scope of protection of the present invention insofar as they are obvious to a person skilled in the art. Explanation of the symbols

[0092] 1 : Self-generating umbrella 110 : Umbrella fabric assembly 111 : 1st Umbrella Stream 112 : 2nd Usancheon 113: First electrode 114: Second electrode 115 : Friction member 116 : Spacer 120: Charge / Discharge Circuit 121 : Rectifier 122 : Light-emitting device 123 : Switch 130 : Umbrella body 140: Umbrella handle

Claims

Claim 1 A self-generating umbrella comprising: a first umbrella fabric having a first electrode formed on one surface; a second umbrella fabric having a second electrode formed on one surface; a friction member formed on at least one surface of the first electrode and the second electrode; a spacer formed on the friction member and having a predetermined height; a rectifier connected to the first electrode and the second electrode; a light-emitting device including at least one light-emitting element; and a switch having one side connected to the rectifier and the other side connected to the light-emitting device; wherein the first electrode and the second electrode comprise at least one material selected from graphene and graphite, at least a portion of the surface of the spacer is formed as a hierarchical nanostructure, the first electrode and the second electrode each comprise a polymer material, the polymer material comprises polytetrafluoroethylene (PTFE), the spacer is spherical in shape, at least a portion of the spacer is porous, and the friction member comprises a material having a stronger tendency to be charged with a positive charge than the polymer material. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete Claim 6 delete Claim 7 delete Claim 8 The method comprises: a preparation step (S1) for preparing first and second umbrella fabrics; an electrode formation step (S2) for forming first and second electrodes on each of the first and second umbrella fabrics; and an assembly step (S4) for assembling the first and second umbrella fabrics to an umbrella body; a friction member formation step (S3-1) for forming a friction member on at least one surface of the first and second electrodes after the electrode formation step (S2) and before the assembly step (S4); and a spacer formation step (S3-2) for forming a spacer on the surface of the friction member, wherein at least a portion of the surface of the spacer is formed as a hierarchical nanostructure, and the electrode formation step (S2) comprises a coating step (S2-1) for applying a composite material comprising at least one of graphene and graphite and a predetermined polymer material to each of the first and second umbrella fabrics. A method for manufacturing a self-generating umbrella comprising: a drying step (S2-2) in which the first and second umbrella fabrics are dried in an environment of 25 degrees or more and 60 degrees or less; wherein the polymer material comprises polytetrafluoroethylene (PTFE), the spacer is spherical in shape, at least a portion of the spacer is porous, and the friction member comprises a material having a stronger tendency to be charged with a positive charge than the polymer material. Claim 9 delete Claim 10 delete Claim 11 delete

Images