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Friction nanogenerator with lubricant

A nano-generator and lubricant technology, applied in the direction of friction generators, synthetic resin layered products, chemical instruments and methods, etc., can solve problems such as poor power generation stability, decreased output performance, and reduced effective contact, and achieve The effect of reducing friction, reducing wear, and reducing loss of mechanical energy

Active Publication Date: 2020-06-05
BEIJING INST OF NANOENERGY & NANOSYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As the pressure increases, the wear of the contact surfaces of the first friction layer 1 and the second friction layer 3 will become serious, and the output performance will decrease
When the pressure is further increased, the friction layer will rupture and gradually lose the power generation effect.
[0006] In addition, since the first friction layer 1 and the second friction layer 3 are made of different materials, as the sliding distance increases, the softer friction layer is continuously sheared to form small wear debris, which forms on the harder friction layer Transfer film, so that the effective contact between the original first friction layer and the second friction layer is reduced, and the output performance is reduced
[0007] Therefore, currently low lifetime due to wear is the main drawback of sliding mode triboelectric nanogenerators
In addition, during the use process, the output performance of the sliding mode triboelectric nanogenerator will be greatly reduced due to the wear, oxidation and aging of materials, making the stability of power generation worse.

Method used

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  • Friction nanogenerator with lubricant
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  • Friction nanogenerator with lubricant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The first friction layer 10 adopts a polyimide film (PI) with a thickness of 0.025 mm, and the second friction layer 20 adopts an aluminum foil with a thickness of 0.06 mm to obtain a friction nanogenerator (PI-Al for short) whose friction surface is PI-Al. ).

[0048] Squalane (liquid lubricant 30) was added dropwise to the surface of the first friction layer 10, the operation was carried out under the conditions of 10N and 1Hz for 1 hour, the open circuit voltage was collected, and the wear surface was analyzed. At the same time, the results under dry grinding conditions without any liquid lubricant were tested, and the results are as follows image 3 shown, using squalane as the liquid lubricant 30 ( image 3 Middle b) can significantly increase the output performance, while under dry grinding conditions ( image 3 Middle a), the open-circuit voltage output performance decreases gradually, and finally stabilizes at a lower value. From the observation of the wear s...

Embodiment 2

[0053] The first friction layer 10 adopts a polytetrafluoroethylene (PTFE) film with a thickness of 0.05 mm, and the second friction layer 20 adopts an aluminum foil with a thickness of 0.06 mm to obtain a friction nanogenerator (PTFE-Al for short) whose friction surface is PTFE-Al. ). The same liquid lubricant squalane and test conditions as in Example 1 were used. The results show that this technical solution is also applicable to PTFE-Al, under liquid lubrication, the output performance is improved and the wear is greatly reduced. Under dry grinding conditions, there is severe wear and a drop in output performance.

Embodiment 3

[0055] For triboelectric nanogenerators containing liquid lubrication, the properties of the liquid are the key to affecting the output performance of the generator. The present invention proposes important indicators for liquid selection: dielectric constant and viscosity of the liquid lubricant after researching and summarizing the output performance of a series of lubricating liquids. It is proposed that the use of low dielectric constant and low viscosity liquid lubricants can effectively guarantee or improve the output performance.

[0056] Comparison of the output performance of the PI-Al generators in Example 1 under different liquid lubrication. The liquid used and its main properties - relative permittivity and dynamic viscosity (mPa·s, 25°C) are as follows. serial number correspondence Image 6 Type of liquid in , where 1 means dry grinding. 2-Squalane (relative dielectric constant 2.09, dynamic viscosity 31.123), 3-liquid paraffin or mineral oil (2.1, 43.47), 4-p...

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Abstract

The invention provides a friction nanogenerator with a lubricant which comprises two friction parts which slide relative to each other, wherein the mutually contacted and sliding surfaces are made ofmaterials with different surface electronegativity, a liquid lubricant is arranged between the two mutually sliding friction parts, and when the two mutually sliding friction parts slide, the generator generates charge output to the outside under the action of surface friction electrification effect and electrostatic induction. According to the technical scheme, material abrasion can be reduced, materials are saved, the replacement period is prolonged, the operation cost is reduced, and finally the power generation cost is reduced. Under the action of the liquid lubricant, the transfer of polar components in the air to charges is reduced; the solid-solid effective contact area is increased, and the output performance can be improved.

Description

technical field [0001] The invention relates to a generator, in particular to a friction nano-generator with lubricant which converts mechanical energy into electrical energy. Background technique [0002] Triboelectric nanogenerators can widely harvest mechanical energy in the surrounding environment and are used in many fields such as energy harvesting and sensing. Compared with the traditional electromagnetic generator, it has the advantages of high power generation efficiency, light weight and low cost, and has attracted extensive attention and research since it was proposed. [0003] The sliding mode triboelectric nanogenerator has a smaller volume and higher output. [0004] Typical structures based on sliding triboelectric nanogenerators, see figure 1 a to figure 1 c, including a first friction layer 1 , a first conductive element 2 placed in contact under the first friction layer, and a second friction layer 3 with high conductivity (while serving as a second cond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N1/04B32B15/08B32B15/082B32B15/20B32B27/28B32B27/32B32B33/00
CPCH02N1/04B32B15/082B32B15/08B32B15/20B32B27/322B32B27/28B32B33/00B32B2307/746
Inventor 史以俊其他发明人请求不公开姓名
Owner BEIJING INST OF NANOENERGY & NANOSYST
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