Method for improving specific capacitance of laser-induced graphene-based capacitor and laser-induced graphene-based capacitor

A laser-induced, graphene-based technology, applied in the field of capacitors, can solve problems such as high production costs, environmental pollution, and complex operations, and achieve the effects of improving efficiency, excellent efficiency, and increasing specific capacitance

Active Publication Date: 2021-09-24
北京烯塔科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for improving the specific capacitance of a laser-induced graphene-based capacitor and a laser-induced graphene-based capacitor. The amorphous carbon impurities form more nanoscale holes, which can effectively improve the specific capacitance of laser-induced graphene-based capacitors; at the same time, the method provided by the invention overcomes the problems of complex operation, high production cost and environmental pollution of traditional methods , conducive to practical industrial applications

Method used

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  • Method for improving specific capacitance of laser-induced graphene-based capacitor and laser-induced graphene-based capacitor
  • Method for improving specific capacitance of laser-induced graphene-based capacitor and laser-induced graphene-based capacitor
  • Method for improving specific capacitance of laser-induced graphene-based capacitor and laser-induced graphene-based capacitor

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preparation example Construction

[0054] In the present invention, taking the interdigital electrode as an example, the preparation method of the laser-induced graphene-based capacitor preferably includes the following steps:

[0055] The laser-induced graphene material subjected to Joule heat treatment is patterned and cut to obtain interdigital electrodes;

[0056] Paste the interdigital electrodes on one side of the substrate, paste the current collector on the single side of the substrate to connect the interdigital electrodes, and coat conductive silver glue at the joint between the interdigital electrodes and the current collector, and then An electrolyte solution is coated on the surface of the interdigital electrodes, and dried under vacuum to solidify the electrolyte solution to obtain a laser-induced graphene-based capacitor.

[0057] In the present invention, double-sided tape is preferably used to stick the interdigital electrode and the current collector. In the present invention, the solvent of ...

Embodiment 1

[0063] (1) Using a CO equipped with a wavelength of 10.6 μm 2 Laser irradiation system irradiates polyimide paper (10×5cm 2 ), laser induced under different laser power conditions to obtain laser-induced graphene paper (LIGP); wherein, the operating conditions include: the scanning mode is progressive scanning, the line-by-line scanning scribe spacing is 100 μm, and the scanning rate is 2inch / s, the image density is 1000PPI; the laser power is 1.25W; the laser induction is carried out at room temperature (25°C) and in an atmospheric environment.

[0064] (2) Paste copper foil on the opposite sides of the laser-induced graphene paper, and apply conductive silver glue on the contact between the copper foil and the laser-induced graphene paper to reduce the contact resistance between the two, at room temperature Under the condition, stand until the conductive silver glue is dried to obtain a laser-induced graphene paper heater (such as figure 1 shown).

[0065] (3) Connect the...

Embodiment 2

[0072] Example 2 Electrochemical performance test of graphene paper after Joule heat treatment at 100°C for 60min

[0073] according to Figure 12 The flow chart shown is for the fabrication of graphene-based capacitors, including the following steps:

[0074] (1) Using a CO equipped with a wavelength of 10.6 μm 2 Laser irradiation system irradiates polyimide paper (10×5cm 2 ) on the single side of ), carry out laser induction to obtain laser-induced graphene paper; wherein, the operating conditions include: the scanning mode is progressive scanning, the line spacing of progressive scanning is 100 μm, the scanning rate is 2 inch / s, and the image density is 1000 PPI; The laser power was 1.25W; the laser induction was performed at room temperature and in an atmospheric environment.

[0075] (2) Paste copper foil on the opposite ends of the laser-induced graphene paper, and apply conductive silver glue on the contact between the copper foil and the laser-induced graphene paper...

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Abstract

The invention provides a method for improving the specific capacitance of a laser-induced graphene-based capacitor and the laser-induced graphene-based capacitor, and belongs to the technical field of capacitors. The method provided by the invention comprises the following steps: providing a laser-induced graphene material; carrying out in-situ Joule heat treatment on the laser-induced graphene material, and obtaining the laser-induced graphene material subjected to Joule heat treatment, wherein the laser-induced graphene material is provided with nanoscale holes; and taking the laser-induced graphene material subjected to Joule heat treatment as an electrode, and assembling to obtain the laser-induced graphene-based capacitor with improved specific capacitance. According to the method, the laser-induced graphene material is subjected to in-situ Joule heat treatment, amorphous carbon impurities in the laser-induced graphene material can be decomposed, more nanoscale holes are formed, the effective active surface area is increased, and therefore the specific capacitance of the laser-induced graphene-based capacitor can be effectively improved; meanwhile, the method provided by the invention overcomes the problems of complex operation, high production cost and environmental pollution of the traditional method.

Description

technical field [0001] The invention relates to the technical field of capacitors, in particular to a method for improving the specific capacitance of a laser-induced graphene-based capacitor and a laser-induced graphene-based capacitor. Background technique [0002] With the rapid development of portable handheld flexible electronic devices, there is an increasing demand for portable energy storage devices with high power, high energy density, various shapes, miniaturization, easy modularization, and integration. Among them, supercapacitors (SCs) can be used not only as supplements to flexible batteries, but also as independent micro power sources due to their ultra-high power density, ultra-fast charge-discharge rate, excellent cycle stability, and remarkable safety. to receive more and more attention. [0003] As an excellent electronic conductor, graphene has a high specific surface area and good flexibility, showing a broad application prospect in micro-supercapacitors...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/36
CPCH01G11/86H01G11/24H01G11/36
Inventor 罗斯达何梅洪
Owner 北京烯塔科技有限公司
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