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A kind of preparation method of graphene-based series linear supercapacitor

A supercapacitor, graphene-based technology, which is used in the preparation of continuous conductive-insulating discontinuous yarns and ultra-high output voltage linear supercapacitors, and the preparation of graphene-based series linear supercapacitors, which can solve the supercapacitor preparation process. Complex, low output voltage, poor flexibility and other problems, to achieve the effect of easy promotion, high output voltage, good flexibility

Active Publication Date: 2020-12-25
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the preparation process of the existing supercapacitor is complicated, and the disadvantages are poor flexibility, non-woven, large volume, low output voltage, etc.

Method used

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  • A kind of preparation method of graphene-based series linear supercapacitor

Examples

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Embodiment 1

[0028] A preparation method for an ultra-high output voltage linear supercapacitor, comprising the following steps:

[0029] Gel preparation: Graphene oxide was prepared by the Hummers method, and the obtained graphene oxide dispersion with a mass fraction of 1-5 mg / mL was magnetically stirred at 40°C, concentrated to a gel state, and transferred to a 60mm petri dish for later use.

[0030] Self-assembly: Wrap the viscose yarn in an S-shape on a self-made hollow rectangular support with a width of 5mm, and dip the lower end in concentrated graphene oxide for 2mm, take it out after 30 minutes, wash it with deionized water and put it in an oven at 40°C for drying Dry. Repeat 4 times to make the graphene oxide fully and evenly adhere to the surface of the viscose yarn.

[0031] Reduction: Suspend the prepared yarn in a 300mL beaker with 2mL HI acid and 5mL glacial acetic acid, and seal it. The beaker was placed in an oil bath at 40°C for 24 hours, cooled, taken out, washed and ...

Embodiment 2

[0035] A preparation method for an ultra-high output voltage linear supercapacitor, comprising the following steps:

[0036] Preparation: Graphene oxide was prepared by the Hummers method, and the prepared graphene oxide dispersion with a mass fraction of 2 mg / ml was transferred to a 60 mm Petri dish for later use. The graphene oxide dispersion is made into filaments by a wet spinning method, and then simply dried at a low temperature (40-60° C.) to obtain continuous pure graphene oxide filaments.

[0037] Reduction: The prepared graphene oxide filaments are locally reduced by laser, thereby making continuous conductive-insulating spaced graphene yarns.

[0038] Supercapacitor assembly test: Colloidal electrolyte is applied to the insulation of the prepared continuous conductive-insulating spacer yarn, and after standing for 12-24 hours to dry, an ultra-high output voltage linear supercapacitor is made and tested.

[0039] The test results are the same as those in Example 1. ...

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Abstract

The invention discloses a graphene-based series linear supercapacitor manufacturing method, which is characterized in that an interrupted composite conductive active material is used to enable yarn tobe partially conductive, yarn with continuous insulation and conduction spacing arrangement is thus formed, a colloidal electrolyte is applied to the insulating yarn, and multiple supercapacitor series devices can be directly assembled. The device has the advantages that the size is small, the output voltage is high, flexibility is good, the manufacturing process is simple, and the operation is easy.

Description

technical field [0001] The invention relates to a method for preparing a graphene-based series linear supercapacitor, in particular to a method for preparing a continuous conduction-insulation discontinuous yarn and a superhigh output voltage linear supercapacitor, and belongs to the technical fields of textile and electrochemistry. Background technique [0002] In recent years, wearable devices have developed rapidly, and have shown broad application prospects in the fields of smart skin, health monitoring, and stretchable circuits, so the energy source for powering them is particularly important. As an energy storage device, rechargeable batteries have been widely used due to their high energy density, but their low power density and poor cycle stability are limiting their development, and their poor flexibility has limited their application in wearable electronic devices. limit. As a flexible energy source, linear supercapacitors are light in weight, high in power densit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86
CPCH01G11/86Y02E60/13
Inventor 张坤张娟
Owner DONGHUA UNIV
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