Graphene power generation and heating fabric and preparation method thereof

Abstract

The present invention discloses a graphene power-generating and heating fabric, comprising a main body of graphene power-generating and heating fabric, the main body being integrally woven from graphene fibers and semiconductor fibers. The graphene fibers are each provided with a metal charging positive electrode, a heating positive electrode, and a heating negative electrode, respectively. The semiconductor fibers are provided with a metal charging negative electrode, the charging positive electrode and charging negative electrode being connected to a charging cable, while the heating positive electrode and heating negative electrode are connected to a heating power supply cable. This power-generating and heating fabric directly incorporates graphene and semiconductor materials into fiber filaments for weaving, resulting in a smooth surface without excessive additional structures, making it comfortable to use. During movement, the contact, separation, and relative positional changes of the graphene and semiconductor fibers convert mechanical energy into electrical energy for continuous power generation, representing a new energy utilization method that is energy-saving and environmentally friendly. Furthermore, the graphene fibers in this fabric combine power generation and heating functions, achieving a high degree of integration and saving costs.

Description

Technical Field

[0001] The present invention relates to the field of textile products, and more particularly to a graphene power-generating and heat-generating fabric. Background Art

[0002] Flexible wearable power generation devices can convert the mechanical energy generated by biological movement into electrical energy, significantly broadening energy access, reducing dependence on external energy sources, and improving convenience. These devices are a research hotspot and an inevitable demand for sustainable development. In recent years, researchers have developed power-generating fabrics based on triboelectric nanogenerators. However, triboelectric power generation requires large amplitudes and struggles to continuously output DC power, requiring additional rectification circuits. The graphene-based power-generating fabric of the present invention, based on the principle of dynamic Schottky diode generation, generates directional DC power with only small amplitudes of movement, or even simple contact and separation, providing stable and reliable technical support for wearable power generation devices.

[0003] With the improvement of people's living standards, wearable heating devices have gradually become mainstream items in winter. Previous heating scarves, heating vests and other products need to be connected to a mobile power supply and rely on external electricity to work. The graphene fiber used in the present invention is used as a positive electrode for power generation and for heating. The graphene power generation and heating fabric can achieve self-power supply without external energy supply. It only needs to move or squeeze to get electricity and heat anytime and anywhere, without various restrictions, which greatly enhances convenience. Summary of the Invention

[0004] Based on the principle of dynamic Schottky diode DC power generation, the present invention proposes a fabric that converts mechanical energy generated by movement into electrical energy. The fabric has a simple structure, is comfortable to use, energy-saving and environmentally friendly, can be used for temporary power supply, and also has a heating function, which can achieve real-time heating.

[0005] A graphene power-generating and heating fabric comprises a graphene power-generating and heating fabric body, the fabric body being provided with a charging cable and a heating power supply cable for connecting to an energy storage module. The power-generating and heating fabric body is integrally woven from graphene fibers and semiconductor fibers. The graphene fibers are connected by metal connecting cables to form a charging positive electrode, a heating positive electrode, and a heating negative electrode, respectively. The semiconductor fibers are connected by metal connecting cables to form a charging negative electrode. The charging positive electrode and charging negative electrode are connected to the charging cable, and the heating positive electrode and heating negative electrode are connected to the heating power supply cable. Preferably, the graphene fibers and semiconductor fibers are woven into an integral structure using a warp-weft interweaving method.

[0006] The graphene fibers are woven from a mixture of several bundles of graphene and several bundles of fibers. The fibers can be natural fibers such as cotton, linen, wool, and silk, or chemical fibers such as polyester, nylon, and acrylic. The graphene fibers can be prepared by the following method: first, a gel-like aqueous solution of graphene oxide is extruded from micropores via a wet spinning method and coagulated into filaments. The graphene filaments are then produced by high-temperature or chemical reduction methods and then blended with the fiber material.

[0007] The semiconductor fibers are made by doping fibers with semiconductor materials. The semiconductor materials can be single elements such as silicon and germanium, or compound semiconductors such as gallium arsenide. The fibers can be natural fibers such as cotton, linen, wool, and silk, or chemical fibers such as polyester, nylon, and acrylic. To prepare the semiconductor fibers, semiconductor nanoparticles or nanosheets can be dispersed in a solution, which is then used to repeatedly impregnate the fiber material. The fibers can then be air-dried or oven-dried.

[0008] The charging positive electrode, charging negative electrode, heating positive electrode, and heating negative electrode can be made of one or more conductive materials such as copper, aluminum, nickel, chromium, titanium, silver, and gold.

[0009] The energy storage module can be a rechargeable battery such as a lithium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a nickel-iron battery, etc., and has a charging input interface and a discharging output interface, which can be connected to a charging line and a heating power line respectively.

[0010] The heating power line is also provided with a temperature control switch so as to control the heating temperature of the cloth.

[0011] This invention interweaves graphene fibers and semiconductor fibers into a fabric, creating multiple sets of small dynamic Schottky diode power generation devices. During use, compression or deformation of the fabric causes the graphene and semiconductor materials to separate or change their relative positions. Based on the principle of dynamic Schottky diode power generation, DC power is generated in a specific direction. This can directly power the graphene fibers, causing them to heat, charge external energy storage circuits, or temporarily power certain electrical devices. This power-generating and heating fabric can autonomously generate and store electricity during the wearer's movement, eliminating the need for external energy sources. This is energy-efficient and environmentally friendly, allowing for anytime, anywhere access to electricity and heating, making it highly convenient and versatile.

[0012] This invention utilizes a warp-and-weft interwoven structure of graphene and semiconductor fibers. This structure facilitates the construction of a highly arrayed graphene / semiconductor dynamic diode generator. Through a series-parallel design, the generated voltage and current are significantly increased, ensuring sufficient output power to meet demand and addressing the issue of low power generation from a single diode unit. Furthermore, the warp-and-weft weave is more sensitive to mechanical forces, demonstrating a strong response to deformation in all directions. Furthermore, the fixed structure allows the fabric to recover after random mechanical forces, enabling repeated power generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of the graphene power generation and heating fabric;

[0014] Figure 2 A detailed image of the weaving of graphene fibers and semiconductor fibers for graphene-generated heat-generating fabric.

[0015] Figure 3 Schematic diagram of the connection between graphene power generation and heating fabric and external energy storage module;

[0016] Figure 4 The voltage output generated by the graphene power-generating and heating fabric during movement;

[0017] Figure 5 This is an infrared image of the heating effect of graphene-generated heating fabric. DETAILED DESCRIPTION

[0018] The present invention is further described below with reference to the accompanying drawings and specific examples.

[0019] Reference Figure 1 The graphene power generation and heating fabric of the present invention is woven from graphene fibers 5 and semiconductor fibers 6, wherein the graphene fibers are connected to a charging positive electrode 31, a heating positive electrode 41 and a heating negative electrode 42, and the semiconductor fibers are connected to a charging negative electrode 32; Figure 2 The figure shows a weaving method for graphene power generation and heating fabric; Figure 3 An electrode lead-out scheme is proposed, and a connection method for an external energy storage module is demonstrated; a preparation process for graphene fibers in the present invention is as follows: first, a gel-like graphene oxide aqueous solution is extruded from micropores by a wet spinning method and solidified into filaments, and then the graphene oxide is reduced by high-temperature heating at 1000°C to obtain graphene filaments, which are then blended with fiber materials to obtain graphene fibers; a preparation process for semiconductor fibers is as follows: first, semiconductor nanoparticles or semiconductor nanosheets are dispersed in water or alcohol, and then the fiber material is immersed in the solution for more than three dipping and padding treatments, each time for 10 to 15 minutes, and then taken out and air-dried or baked to obtain semiconductor fibers.

[0020] Example 1:

[0021] 1) The main body of graphene fiber and semiconductor fiber is made of polyester, and the semiconductor material part of semiconductor fiber is made of silicon. After the fiber material is made, refer to Figure 1 The graphene power generation and heating fabric body with a size of 20 cm × 20 cm was woven in the manner shown.

[0022] 2) Aluminum is selected as the electrode material, see Figure 1 The method shown is to prepare the charging positive electrode, heating positive electrode and heating negative electrode on the surface of the graphene fiber, and prepare the charging negative electrode on the side of the semiconductor fiber. During the preparation process, be careful not to let the same electrode contact the graphene fiber and the semiconductor fiber at the same time;

[0023] 3) Connect wires to each electrode, see Figure 3 Lead the charging positive pole and charging negative pole to the charging interface to supply power to the energy storage module; lead the heating positive pole and heating negative pole to the power supply interface, and add a temperature control switch.

[0024] Connect the positive and negative electrodes of the fabric to a voltmeter, and simulate the state of the fabric during movement by pressing and rubbing it slightly. Record the change of the output voltage over time and obtain the following: Figure 4 The voltage-time curve shown in the figure shows that the average voltage of the generated electricity is about 8 to 10 V. Connect the positive charging electrode and negative charging electrode of the fabric directly to the positive heating electrode and negative heating electrode respectively, perform the above pressing and kneading operations, and measure the temperature after the temperature stabilizes. Figure 5 (a) shows the direct heating temperature, which can reach up to about 52°C. After adding the energy storage module and temperature control function, repeat the above operation and set the temperature to 36°C. The measured heating effect is as follows Figure 5 As shown in (b), when the temperature is within the range of 36±1℃, the excess electricity will be stored in the energy storage module for continuous operation or powering external electrical equipment.

[0025] Example 2:

[0026] 1) The main body of graphene fiber and semiconductor fiber is made of polyester, and the semiconductor material part of semiconductor fiber is made of germanium. After being made into fiber material, refer to Figure 1 The graphene power generation and heating fabric body with a size of 20 cm × 20 cm was woven in the manner shown.

[0027] 2) Silver and copper are used as electrode materials, see Figure 1 The method shown is to prepare the charging positive electrode, heating positive electrode and heating negative electrode on the surface of the graphene fiber, and prepare the charging negative electrode on the side of the semiconductor fiber. During the preparation process, be careful not to let the same electrode contact the graphene fiber and the semiconductor fiber at the same time;

[0028] 3) Connect wires to each electrode, see Figure 3 Lead the charging positive pole and charging negative pole to the charging interface to supply power to the energy storage module; lead the heating positive pole and heating negative pole to the power supply interface, and add a temperature control switch.

[0029] Example 3:

[0030] 1) The main body of graphene fiber and semiconductor fiber is made of polyester, and the semiconductor material part of semiconductor fiber is made of gallium arsenide compound semiconductor. After the fiber material is made, refer to Figure 1 The graphene power generation and heating fabric body with a size of 20 cm × 20 cm was woven in the manner shown.

[0031] 2) Select nickel-chromium alloy as electrode material, see Figure 1 The method shown is to prepare the charging positive electrode, heating positive electrode and heating negative electrode on the surface of the graphene fiber, and prepare the charging negative electrode on the side of the semiconductor fiber. During the preparation process, be careful not to let the same electrode contact the graphene fiber and the semiconductor fiber at the same time;

[0032] 3) Connect wires to each electrode, see Figure 3 Lead the charging positive pole and charging negative pole to the charging interface to supply power to the energy storage module; lead the heating positive pole and heating negative pole to the power supply interface, and add a temperature control switch.

[0033] The power-generating and heat-generating fabric of the present invention directly integrates graphene and semiconductor materials into fiber filaments for weaving. The fabric has a smooth surface, no excessive additional structures, and is comfortable to use. During movement, the constant contact and separation or relative position changes between the graphene fibers and the semiconductor fibers can convert mechanical energy into electrical energy for continuous power generation. At the same time, it has a heat generation function, making it a new type of fabric.

Claims

1. A graphene power generation and heating fabric, characterized in that: The invention comprises a graphene power generation and heating fabric body, the fabric body being provided with a charging line and a heating power line for connecting to an energy storage module. The fabric body is integrally woven from graphene fibers and semiconductor fibers, the semiconductor fibers being made by doping semiconductor materials into fibers. The graphene fibers are provided with a metal charging positive electrode, a heating positive electrode, and a heating negative electrode, and the semiconductor fibers are provided with a metal charging negative electrode. The charging positive electrode and the charging negative electrode are connected to the charging line, and the heating positive electrode and the heating negative electrode are connected to the heating power line. The graphene fibers and semiconductor fibers are woven into an integrated structure in a warp and weft interlaced manner to construct multiple groups of small dynamic Schottky diode power generation devices; The energy storage module adopts a rechargeable battery and is provided with a charging input interface and a discharging output interface, which are connected to a charging line and a heating power line respectively.

2. The graphene power generation and heating fabric according to claim 1, characterized in that: The graphene fiber is formed by mixing graphene and fibers and weaving them together. The fibers are natural fibers or chemical fibers.

3. The graphene power generation and heating fabric according to claim 1, characterized in that: The semiconductor material is a simple substance or compound semiconductor, and the fibers in the semiconductor fibers are natural fibers or chemical fibers.

4. The graphene power generation and heating fabric according to claim 1, characterized in that: The charging positive electrode, the charging negative electrode, the heating positive electrode and the heating negative electrode are all made of conductive materials.

5. The graphene power generation and heating fabric according to claim 1, characterized in that: The heating power line is also provided with a temperature control switch so as to control the heating temperature of the cloth.

Images