A triboelectric device based on amorphous alloy thin film electrodes and its fabrication method

Abstract

This invention discloses a triboelectric device based on an amorphous alloy thin-film electrode and its preparation method. The device comprises an iron-based amorphous alloy with the following composition by mass percentage: Si 0.01%–6%, B 1%–5%, V < 1%, Cr 0.01%–5%, with the balance being Fe. The preparation method includes: preparing an iron-based amorphous alloy thin film with a thickness of 20–50 μm; cutting the film into small sizes and attaching it to an acrylic plate as the positive electrode; attaching a polytetrafluoroethylene (PTFE) film to a conductive aluminum foil as the negative electrode; and assembling the positive and negative electrodes to obtain the triboelectric device. The iron-based amorphous alloy used in this invention has excellent conductivity and higher output performance compared to traditional materials such as iron, copper, and aluminum. The triboelectric nanogenerator prepared from it has high output and corrosion resistance, and can be used for environmental energy harvesting of mechanical energy and marine environmental monitoring.

Description

Technical Field

[0001] This invention belongs to the field of electrode materials, specifically relating to a triboelectric device based on an amorphous alloy thin film electrode and its preparation method. Background Technology

[0002] Triboelectric nanogenerators (TENGs) convert minute amounts of mechanical energy into electrical energy using the coupling effect of triboelectric charging and electrostatic induction. In recent years, TENGs have proven their feasibility in marine environmental monitoring, energy harvesting, radio distress systems, wearable devices, and sensing devices. However, due to the inherent limitations of the triboelectric materials, they struggle to function properly in corrosive environments, hindering their application in extreme environments or high-salinity sea levels. Therefore, it is necessary to develop triboelectric nanogenerator devices with high corrosion resistance, capable of maintaining not only high power output but also stable output in corrosive environments.

[0003] Ferro-based amorphous alloys, also known as metallic glasses (MG), are a promising functional material. Their mechanical properties differ from the crystalline structure of ordinary metals, exhibiting a disordered atomic structure. Due to their unique microscopic structure of short-range order and long-range disorder, ferro-based amorphous alloy thin films possess excellent comprehensive mechanical properties, corrosion resistance, and wear resistance, making them promising for applications in high-tech fields such as sensors, wireless charging, and 5G devices. Currently, there are no reports of using amorphous alloys in TENG (Transformer Electron Device) to enhance corrosion resistance or improve output performance. Summary of the Invention

[0004] The main objective of this invention is to provide a method for fabricating triboelectric devices based on amorphous alloy thin film electrodes.

[0005] Another objective of this invention is to provide a triboelectric device based on an amorphous alloy thin-film electrode, which is prepared by the above-described method and has high output and corrosion resistance.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides an iron-based amorphous alloy, the composition of which, by mass percentage, is: Si 0.01%–6%, B 1%–5%, V < 1%, Cr 0.01%–5%, with the balance being Fe.

[0008] Preferably, the composition of the iron-based amorphous alloy, by mass percentage, is: Si 5%, B 4%, V 0.7%, Cr 4.3%, with the balance being Fe.

[0009] The present invention also provides an iron-based amorphous alloy thin film with a thickness of 20-50 μm and a composition by mass percentage of: Si 0.01%-6%, B 1%-5%, V <1%, Cr 0.01%-5%, with the balance being Fe.

[0010] Preferably, the composition of the iron-based amorphous alloy thin film, by mass percentage, is: Si 5%, B 4%, V 0.7%, Cr 4.3%, with the balance being Fe.

[0011] This invention also provides a method for preparing a triboelectric device, comprising the following steps:

[0012] (1) Prepare an iron-based amorphous alloy thin film with the following properties: thickness of 20-50 μm, composition by mass percentage of Si 0.01%-6%, B 1%-5%, V < 1%, Cr 0.01%-5%, and balance Fe;

[0013] (2) Preparation of the triboelectric positive electrode: The iron-based amorphous alloy film is cut into small-sized films and attached to an acrylic plate as a triboelectric positive electrode.

[0014] (3) Preparation of triboelectric negative electrode: A polytetrafluoroethylene (PTFE) film is attached and fixed on a conductive aluminum foil to serve as a triboelectric negative electrode;

[0015] (4) The triboelectric positive electrode and the triboelectric negative electrode are assembled to obtain a triboelectric device.

[0016] Preferably, the iron-based amorphous alloy film is cut into 2×2cm pieces. 2 Small-sized thin films.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. The iron-based amorphous alloy used in this invention has good conductivity and can serve as both a positive electrode and a triboelectric material, exhibiting higher output performance compared to traditional materials such as iron, copper, and aluminum.

[0019] 2. Due to the excellent properties of iron-based amorphous alloys and their output performance under corrosive environments, the TENG prepared from them can be applied to environmental energy harvesting of mechanical energy and marine environmental monitoring, greatly enriching the application range of TENG. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the device structure of the iron-based amorphous alloy triboelectric nanogenerator in Example 1.

[0021] Figure 2 The power density of the iron-based amorphous alloy triboelectric nanogenerator and the aluminum-based triboelectric nanogenerator in Example 1 is shown.

[0022] Figure 3 The output voltage of the iron-based amorphous alloy triboelectric nanogenerator in Example 1 after immersion corrosion for different times is shown. Detailed Implementation

[0023] To make the technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0024] The following embodiments provide an iron-based amorphous alloy, the composition of which, by mass percentage, is: Si 0.01%–6%, B 1%–5%, V < 1%, Cr 0.01%–5%, with the balance being Fe.

[0025] In some embodiments, the composition of the iron-based amorphous alloy, by mass percentage, is: Si 5%, B 4%, V 0.7%, Cr 4.3%, with the balance being Fe.

[0026] The following embodiments provide an iron-based amorphous alloy thin film with a thickness of 20-50 μm and a composition by mass percentage of: Si 0.01%-6%, B 1%-5%, V < 1%, Cr 0.01%-5%, with the balance being Fe.

[0027] In some embodiments, the composition of the iron-based amorphous alloy thin film, by mass percentage, is: Si 5%, B 4%, V 0.7%, Cr 4.3%, with the balance being Fe.

[0028] The following embodiments provide a triboelectric device, the preparation method of which includes the following steps:

[0029] (1) Prepare an iron-based amorphous alloy thin film with the following properties: thickness of 20-50 μm, composition by mass percentage of Si 0.01%-6%, B 1%-5%, V < 1%, Cr 0.01%-5%, and balance Fe;

[0030] (2) Preparation of triboelectric positive electrode: Cut the iron-based amorphous alloy thin film into small-sized films and attach them to an acrylic plate to serve as triboelectric positive electrode;

[0031] (3) Preparation of triboelectric negative electrode: PTFE film is attached and fixed on conductive aluminum foil to serve as triboelectric negative electrode;

[0032] (4) The positive and negative electrodes of the friction are assembled to obtain the triboelectric device.

[0033] In some embodiments, the iron-based amorphous alloy film is cut into 2×2cm pieces. 2 Small-sized thin films.

[0034] Example 1

[0035] According to such Figure 1 The device structure shown is used to fabricate an iron-based amorphous alloy triboelectric nanogenerator. The iron-based amorphous alloy, by mass percentage, comprises: Si 5%, B 4%, V 0.7%, Cr 4.3%, with the balance being Fe. This alloy serves as the positive electrode and triboelectric material for the device. The iron-based amorphous alloy film is cut into 2×2 cm pieces. 2 A small-sized thin film is attached and fixed to an acrylic plate as a triboelectric positive electrode; a PTFE film is attached and fixed to a conductive aluminum foil as a triboelectric negative electrode; the triboelectric positive electrode and the triboelectric negative electrode are assembled to obtain a triboelectric device.

[0036] Example 2

[0037] The external force of the iron-based amorphous alloy triboelectric nanogenerator is applied by a linear mechanical motor (Worm Gear Motor-GW31ZY), which is adjusted to control the motion frequency at 2Hz. The generated voltage, current, and charge signals are acquired in real time using an electrometer (Keithley 6514) and a data acquisition platform (DA-ARM1651). Compared to traditional aluminum, the iron-based amorphous alloy, as the triboelectric positive electrode and triboelectric material, exhibits a higher power density. The output power of the triboelectric nanogenerator is as follows: Figure 2 As shown.

[0038] TENGs are widely used in marine environment and human health monitoring. However, the copper, aluminum, and iron materials used in TENGs are easily affected by sweat and marine environments, leading to chemical changes that negatively impact the TENG's output performance. This embodiment tests the corrosion resistance of iron-based amorphous alloys: using immersion time as a variable, amorphous alloy films of the same size were immersed in a 3.5 wt.% sodium chloride solution for 48 h, 96 h, and 240 h, respectively. The output voltage under different corrosion times is as follows: Figure 3 As shown.

[0039] The above description represents a preferred embodiment of the present invention, but the present invention should not be limited to the content disclosed in this embodiment. Therefore, any equivalent or modified versions made without departing from the spirit of the present invention fall within the scope of protection of the present invention.

Claims

1. A method for preparing a triboelectric device, characterized in that, Includes the following steps: (1) Prepare iron-based amorphous alloy thin films that meet the following requirements: thickness of 20~50μm, composition by mass percentage of Si 0.01%~6%, B 1%~5%, V<1%, Cr 0.01%~5%, balance Fe; (2) Preparation of the triboelectric positive electrode: The iron-based amorphous alloy film is cut into small-sized films and attached to an acrylic plate as a triboelectric positive electrode; (3) Preparation of triboelectric negative electrode: A polytetrafluoroethylene film is attached and fixed on a conductive aluminum foil to serve as a triboelectric negative electrode; (4) The triboelectric positive electrode and the triboelectric negative electrode are assembled to obtain a triboelectric device.

2. The method for preparing the triboelectric device according to claim 1, characterized in that, The iron-based amorphous alloy film was cut into 2×2 cm pieces. 2 Small-sized films.

3. The method for preparing the triboelectric device according to claim 1, characterized in that, The composition of the iron-based amorphous alloy thin film, by mass percentage, is: Si 5%, B 4%, V 0.7%, Cr 4.3%, with the balance being Fe.

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