Rotary solid-liquid friction nanometer generator with high stability
By designing a rotary solid-liquid friction nanogenerator, the friction between the film of strong electronegative material and polar liquid generates current, the problem of degradation of output performance caused by wear of friction materials in solid-solid friction nanogenerators is solved, and high stability and long-term use of output performance is achieved.
Patent Information
- Application Number
- CN202510055849.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2025-04-18
AI Technical Summary
The existing solid-solid-type friction nanogenerators have degraded output performance due to thermal wear of friction materials after long-term operation, and there is no efficient rotary solid-liquid friction nanogenerator for wind and water energy capture.
A rotary solid-liquid friction nanogenerator is designed, which adopts a circular insulated shell, a conductive structure, a first conductive film and a polar liquid to generate alternating current through friction between the film of a strong electronegative material and the polar liquid. Driven by the external driving source, the friction between the film of the strong electronegative material and the polar liquid can continuously output current, avoiding wear of the friction material.
It achieves high stability and long-term use of output performance stability, avoids wear of friction materials, and improves the service life and output performance of friction nanogenerators.
Smart Images
Figure CN119853494A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of friction generators, and in particular to a rotary solid-liquid friction nanogenerator with high stability. Background Art
[0002] As the times continue to develop, non-renewable energy sources such as coal, oil, and natural gas are being consumed in large quantities every day. While we are facing resource depletion, we also need to face various environmental pollution problems caused by the consumption of these non-renewable energy sources. Compared with the non-renewable energy sources mentioned above, wind energy and hydropower are low-cost, high-efficiency, clean and pollution-free green energy sources. People can achieve sustainable development of energy, reduce environmental pollution and alleviate resource depletion through reasonable utilization.
[0003] Friction nanogenerators have many advantages, such as light weight, low cost, and high efficiency, and are particularly suitable for capturing wind and water energy. Among the many reported cases of friction nanogenerators, the vast majority of friction nanogenerators are of the solid-solid type. There is a huge drawback of the solid-solid type of friction nanogenerator, which is that after a long period of operation, the friction materials of the two solids will cause surface wear of the materials due to the heat generated by the long-term operation, thus having a huge impact on the output performance of the friction nanogenerator. Although a few scholars have devoted themselves to the research of solid-liquid type friction nanogenerators and used them to improve the stability of the output performance of friction nanogenerators, a rotating solid-liquid friction nanogenerator that can efficiently collect wind and water energy has not yet been proposed.
[0004] Therefore, it is necessary to provide a rotary solid-liquid friction nanogenerator with high stability to solve the above problems. Summary of the invention
[0005] The invention provides a rotary solid-liquid friction nanogenerator with high stability to solve the existing problems.
[0006] The present invention provides a highly stable rotary solid-liquid friction nanogenerator using the following technical solutions, including: A circular insulating shell, the inner wall of which is provided with two conductive structures, which are used for transmission connection with an external driving source; Two first conductive films are attached to the outer peripheral surface of the circular insulating shell, and the two first conductive films are electrically connected to the conductive structure one by one through a wire respectively; A film of highly electronegative material is disposed on a conductive structure on the inner wall of a circular insulating housing; A polar liquid is disposed in a circular insulating housing; When an external driving source drives the circular insulating shell to rotate, the polar liquid and the strongly electronegative film rub to output alternating current.
[0007] Preferably, the conductive structure includes: a second conductive film, which is connected to a first conductive film through a wire; the second conductive films of the two conductive structures are evenly distributed on the inner wall of the circular insulating shell, and each second conductive film is covered with a piece of highly electronegative material film.
[0008] Preferably, a plurality of insulating inner shells are arranged in the circular insulating outer shell, the end faces of the insulating inner shells are connected to the inner end faces of the circular insulating outer shells, and a spacing for filling polar liquid is arranged between adjacent circular insulating outer shells and insulating inner shells, and between two insulating inner shells, wherein two conductive structures are arranged on the inner wall of each insulating inner shell; a film of a strongly electronegative material is arranged on the conductive structure on the inner wall of each insulating inner shell, wherein each conductive structure is connected to a first conductive film correspondingly arranged on the outer periphery of the circular insulating outer shell through a wire.
[0009] Preferably, the polar liquid is pure water.
[0010] Preferably, the highly electronegative material film is a FEP film.
[0011] Preferably, the volume of the polar liquid is 17.8% of the volume of the circular insulating shell.
[0012] Preferably, the total area of the second conductive film is 47.9% of the inner wall area of the circular insulating shell.
[0013] Preferably, the first conductive film and the second conductive film are both made of copper film.
[0014] A power generation system adopts the following technical solution, including: a rotary solid-liquid friction nanogenerator with high stability according to the present invention.
[0015] The beneficial effects of the present invention are: 1. The rotary solid-liquid friction nanogenerator of the present invention generates electricity by friction between solid materials and polar liquids, that is, through a conductive structure arranged in a circular insulating shell, and a first conductive film arranged on the outer wall of the circular insulating shell, a strongly electronegative material film is arranged on the conductive structure, so that when the circular insulating shell of the generator is driven to rotate by an external driving source, the strongly electronegative material film and the polar liquid friction generate current, which is input through the conductive structure and output from the first conductive film, thereby realizing power generation, thereby improving the output performance of the friction nanogenerator, and the friction material will not be worn after a long period of work during the solid-liquid friction process, so that the stability and service life of the friction nanogenerator can be fully guaranteed.
[0016] 2. The present invention arranges a plurality of insulating inner shells in a circular insulating outer shell, and arranges a conductive structure in each insulating inner shell that is the same as that in the insulating outer shell. Then, a first conductive film is arranged corresponding to the outer wall of the circular insulating outer shell, thereby forming a multi-layer power generation structure. The multi-layer power generation structure makes full use of the internal space of the circular insulating outer shell and can improve the output performance of the rotary solid-liquid friction nanogenerator. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 A cross-sectional view of an embodiment of a rotary solid-liquid friction nanogenerator with high stability according to the present invention; Figure 2 for Figure 1 Schematic diagram of the overall structure; Figure 3 A schematic diagram of the structure of a rotary solid-liquid friction nanogenerator with high stability of the present invention, in which a plurality of insulating inner shells are built into a circular insulating outer shell; Figure 4 The output images of the rotating solid-liquid friction nanogenerator when using pure water with different volume ratios in the embodiment of the present invention; Figure 5 The output image of the rotary solid-liquid friction nanogenerator when using pure water and different friction materials in the embodiment of the present invention; Figure 6 The output image of the rotary solid-liquid friction nanogenerator when using PTFE membrane and different ion solutions in the embodiment of the present invention; Figure 7 This is a durability test image of the rotary solid-liquid friction nanogenerator in an embodiment of the present invention.
[0019] In the figure: 1. circular insulating shell; 2. first conductive film; 3. second conductive film; 4. film of strongly electronegative material; 5. polar liquid. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0021] An embodiment of a rotary solid-liquid friction nanogenerator with high stability of the present invention is as follows: Figure 1 As shown, it includes: a circular insulating shell 1, two first conductive films 2, a strongly electronegative material film 4 and a polar liquid 5. The inner wall of the circular insulating shell 1 is provided with two conductive structures. The circular insulating shell 1 is used for transmission connection with an external driving source, and the external driving source is a wind energy driving source or a water energy driving source; the two first conductive films 2 are arranged on the outer peripheral surface of the circular insulating shell 1 by surrounding and pasting, and the two first conductive films 2 are electrically connected to the conductive structure one by one through a wire; the strongly electronegative material film 4 is arranged on the conductive structure on the inner wall of the circular insulating shell 1; the polar liquid 5 is arranged in the circular insulating shell 1; wherein, when the external driving source drives the circular insulating shell 1 to rotate, the polar liquid 5 and the strongly electronegative film rub to output alternating current.
[0022] In one embodiment, Figure 1 and Figure 2 As shown, the conductive structure includes: a second conductive film 3, the second conductive film 3 is connected to a first conductive film 2 through a wire; the second conductive films 3 of the two conductive structures are evenly arranged on the inner wall of the circular insulating shell 1, and each second conductive film 3 is pasted and covered with a piece of strong electronegative material film 4. In this embodiment, the strong electronegative material film 4 can completely cover the second conductive film 3 to prevent the polar liquid 5 from contacting the second conductive film 3 and causing a short circuit. One side of the second conductive film 3 is pasted with the strong electronegative material film 4, and the other side of the second conductive film 3 is pasted on the inner wall of the circular insulating shell 1. The wire is a copper wire, one end of the copper wire is connected and pasted on the second conductive film 3 inside the circular insulating shell 1, and the other end of the copper wire is led out through a small hole to the outside of the circular insulating shell 1 and connected to the first conductive film 2 on the outer wall of the circular insulating shell 1. The first conductive film 2 is pasted around the circular insulating shell 1, and the first conductive film 2 pasted outside the circular insulating shell 1 is an output electrode, and the second conductive film 3 is an input electrode. The other output electrode is connected to another second conductive film 3 inside the circular insulating shell 1 using a copper wire.
[0023] In one embodiment, Figure 3As shown, a plurality of insulating inner shells are arranged in a circular insulating outer shell 1, and the end faces of the insulating inner shells are connected to the inner end faces of the circular insulating outer shells 1, and a spacing for filling polar liquid 5 is arranged between adjacent circular insulating outer shells 1 and insulating inner shells, and between two insulating inner shells, wherein two conductive structures are arranged on the inner wall of each insulating inner shell; a strong electronegative material film 4 is arranged on the conductive structure on the inner wall of each insulating inner shell, wherein each conductive structure is connected to a first conductive film 2 correspondingly arranged on the outer periphery of the circular insulating outer shell 1 through a wire, and it should be noted that the multi-layer structure can make full use of the internal space of the circular insulating outer shell 1, so that the rotary solid-liquid friction nanogenerator can produce a larger output.
[0024] Specifically, the polar liquid 5 is pure water, tap water, rainwater or ionic solution. In one embodiment, the polar liquid 5 is pure water. When pure water is selected, since there are only a few hydrogen ions and hydroxide ions in pure water, the ion shielding effect is the weakest, so the output performance of the rotary solid-liquid friction nanogenerator is better than that of other polar liquids 5.
[0025] Specifically, the strong electronegative material film 4 is a PTFE film, a FEP film or a PDMS film. In this embodiment, since the FEP film has stronger electronegativity and hydrophobicity than other types of strong electronegative material films 4, it can make the output of the rotary solid-liquid friction nanogenerator optimal. Therefore, the polar liquid 5 in this embodiment is a FEP film.
[0026] Specifically, since a small portion of the polar liquid 5 will remain on the surface of the strongly electronegative material when it is separated from the strongly electronegative material, thereby affecting the transfer of charge, appropriately reducing the volume of the polar liquid 5 can increase the output of the rotary solid-liquid friction nanogenerator. Therefore, in one embodiment, the volume of the polar liquid 5 is 17.8% of the volume of the circular insulating shell 1, and the total area of the second conductive film 3 is 47.9% of the inner wall area of the circular insulating shell 1.
[0027] Specifically, the first conductive film 2 and the second conductive film 3 are both made of copper film.
[0028] An embodiment of a power generation system includes: a rotary solid-liquid friction nanogenerator with high stability according to the present invention.
[0029] The following is combined with Figure 4-Figure 7 This embodiment is specifically described: The rotary solid-liquid friction nanogenerator of this embodiment includes: a cylindrical insulating shell 1, a film 4 of a strongly electronegative material of different types, a second conductive film 3, pure water and a copper wire. The diameter of the cylindrical insulating shell 1 is 8.5 cm and the height is 9 cm; the thickness of the copper film is 65 μm, the length is 9 cm and the width is 6 cm; the thickness of the strongly electronegative material film 4 is 50 μm, the length is 11 cm and the width is 8 cm. The conductive structure adopts Figure 1 The structure shown. The large-area strongly electronegative material film 4 can completely cover the second conductive film 3 to prevent the polar liquid 5 from contacting the second conductive film 3 and causing a short circuit. The second conductive film 3 is pasted on the inner wall of the cylindrical insulating shell 1, and is connected and led out to the outside of the cylindrical insulating shell 1 with a copper wire. The copper wire is then glued to the first conductive film 2 and wrapped around the cylindrical insulating shell 1 to connect the second conductive film 3. The first conductive film 2 pasted around the cylindrical insulating shell 1 is an output electrode. Another first conductive film 2 on the inner wall of the cylindrical insulating shell 1 is also connected and led out to the outside of the cylindrical insulating shell 1 with a copper wire, and another second conductive film 3 is pasted around it as another output electrode.
[0030] In the generator of this embodiment, PTFE membrane is used, and the experimental results obtained by using pure water with volume proportions of 13.3%, 17.8%, 22.2%, 31.3%, and 40.0% are as follows: Figure 4 As shown, Figure 4 (a) shows the voltage output characteristic curve of the rotary solid-liquid friction nanogenerator; Figure 4 (b) Current output characteristic curve of the rotary solid-liquid friction nanogenerator; Figure 4 (c) shows the charge output characteristic curve of the rotary solid-liquid friction nanogenerator. Figure 4 (a) Figure 4 (b) and Figure 4 (c) It can be seen that when the volume proportion of pure water is 17.8%, the generator can produce a greater output.
[0031] In the generator of this embodiment, pure water is used, and FEP, PTFE, and PDMS are selected as the friction film to obtain the experimental results as shown in the following figure: Figure 5 As shown, Figure 5 (a) shows the voltage output characteristic curve of the rotary solid-liquid friction nanogenerator; Figure 5 (b) Current output characteristic curve of the rotary solid-liquid friction nanogenerator; Figure 5 (c) shows the charge output characteristic curve of the rotary solid-liquid friction nanogenerator. Figure 5 (a) Figure 5 (b) and Figure 5(c) It can be seen that when pure water and FEP film are used for triboelectric generation, the generator can produce a larger output.
[0032] In the generator of this embodiment, the experimental results when pure water, tap water, MgCl2 solution and NaCl solution are selected respectively and PTFE is used as the friction material are as follows: Figure 6 As shown, Figure 6 (a) shows the voltage output characteristic curve of the rotary solid-liquid friction nanogenerator when different ion solutions are selected; Figure 6 (b) shows the current output characteristic curve of the rotary solid-liquid friction nanogenerator when different ion solutions are selected; Figure 6 (c) shows the charge output characteristic curve of the rotary solid-liquid friction nanogenerator when different ion solutions are selected. Figure 6 (a) Figure 6 (b) and Figure 6 (c) It can be seen that when pure water and PTFE membrane are used for triboelectric generation, the generator can produce a larger output; Figure 7 As shown, pure water and PTFE membrane were used for friction. After 8 hours of continuous testing at a rotation speed of 200 rpm, the transferred charge of the rotary solid-liquid friction nanogenerator did not decrease, demonstrating that the rotary solid-liquid friction nanogenerator has super high durability and stability when the polar liquid is pure water.
[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. A rotary solid-liquid friction nanogenerator with high stability, characterized in that: include: A circular insulating shell, the inner wall of which is provided with two conductive structures, which are used for transmission connection with an external driving source; Two first conductive films are attached to the outer peripheral surface of the circular insulating shell, and the two first conductive films are electrically connected to the conductive structure one by one through a wire respectively; A film of highly electronegative material is disposed on a conductive structure on the inner wall of a circular insulating housing; A polar liquid is disposed in a circular insulating housing; When an external driving source drives the circular insulating shell to rotate, the polar liquid and the strongly electronegative film rub to output alternating current.
2. The rotary solid-liquid friction nanogenerator with high stability according to claim 1, characterized in that: The conductive structure includes: a second conductive film, which is connected to a first conductive film through a wire; the second conductive films of the two conductive structures are evenly arranged on the inner wall of the circular insulating shell, and each second conductive film is covered with a strong electronegative material film.
3. The rotary solid-liquid friction nanogenerator with high stability according to claim 1, characterized in that: A plurality of insulating inner shells are arranged in a circular insulating outer shell, the end faces of the insulating inner shells are connected to the inner end faces of the circular insulating outer shells, and a gap for filling polar liquid is arranged between adjacent circular insulating outer shells and insulating inner shells, and between two insulating inner shells, wherein two conductive structures are arranged on the inner wall of each insulating inner shell; a film of a strongly electronegative material is arranged on the conductive structure on the inner wall of each insulating inner shell, wherein each conductive structure is connected to a first conductive film correspondingly arranged on the outer periphery of the circular insulating outer shell through a wire.
4. The rotary solid-liquid friction nanogenerator with high stability according to claim 1, characterized in that: The polar liquid is purified water, tap water or ion solution.
5. The rotary solid-liquid friction nanogenerator with high stability according to claim 1, characterized in that: The strong electronegative material film is a PTFE film, a FEP film or a PDMS film.
6. The rotary solid-liquid friction nanogenerator with high stability according to claim 1, characterized in that: The volume of the polar liquid is 15% to 20% of the volume of the circular insulating shell.
7. The rotary solid-liquid friction nanogenerator with high stability according to claim 2, characterized in that: The total area of the second conductive film is 45% to 50% of the inner wall area of the circular insulating shell.
8. The rotary solid-liquid friction nanogenerator with high stability according to claim 2, characterized in that: The first conductive film and the second conductive film are both made of copper film.
9. A power generation system, characterized in that: include: A rotary solid-liquid friction nanogenerator with high stability as described in any one of claims 1 to 8.