Preparation method of flexible supercapacitor electrode

A supercapacitor and electrode technology, applied in the field of nanomaterials, can solve the problems of high process, price restrictions, and restrictions on the application of flexible electrode materials, and achieve the effect of good dispersion and improved feasibility

Active Publication Date: 2021-05-07
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current commercial activated carbon needs to add conductive agent and binder, which will increase the total mass of the device, thus limiting its application as a flexible electrode material.
In contrast, carbon nanotubes and graphene can be prepared into flexible electrodes by physical and chemical methods, but the precise process and high price make them limited.

Method used

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  • Preparation method of flexible supercapacitor electrode
  • Preparation method of flexible supercapacitor electrode

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Embodiment 1

[0019] In this embodiment, electrospinning is used to prepare a nanofiber doped with graphene quantum dots. The specific steps include:

[0020] The first step is to use graphite oxide aqueous solution and hydrogen peroxide as raw materials, add deionized water and place it in a photochemical reactor for reaction. After the reaction is completed, vacuum filter and spin dry to obtain graphene quantum dots. Specifically: take a certain amount of oxidized Graphene is dispersed in deionized water, configured as a 2mg / mL graphene oxide solution, and ultrasonicated for 30min. Then, 5 mL of graphene oxide solution, 0.5 mL of hydrogen peroxide and 70 mL of deionized water were added dropwise to the five quartz tubes, and placed in the photochemical reactor. After reacting for 37 minutes, the product was taken out, rotated at 50°C for 30 minutes, transferred to a dialysis bag, dialyzed for 2-3 days, and then rotated to dryness to collect graphene quantum dots.

[0021] In the second s...

Embodiment 2

[0025] This embodiment specifically includes the following steps:

[0026] Step 1. Take a certain amount of graphene oxide, disperse it in deionized water, prepare a 2 mg / mL graphene oxide solution, and ultrasonicate for 30 minutes. Then, 5 mL of graphene oxide solution, 0.5 mL of hydrogen peroxide and 70 mL of deionized water were added dropwise to the five quartz tubes, and placed in the photochemical reactor. After reacting for 37 minutes, the product was taken out, rotated at 50°C for 30 minutes, transferred to a dialysis bag, dialyzed for 2-3 days, and then rotated to dryness to collect graphene quantum dots.

[0027] Step 2. Take 60 mg of graphene quantum dots obtained in step 1, disperse them in 5 mL of DMF, and add 0.6 g of polyacrylonitrile and 0.6 g of polymethyl methacrylate to it after ultrasonication for 1 h, and heat in an oil bath at 60°C Stir for 8 hours to obtain a uniformly mixed precursor solution.

[0028] Step 3. Transfer the precursor solution to a 20mL...

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Abstract

A method for preparing a flexible supercapacitor electrode. After dispersing graphene quantum dots in an organic solvent, slowly add them to a polymer precursor solution and use electrospinning to prepare a nanofiber film, and then combine the nanofiber film with carbon Paper and water filter paper encapsulate the electrodes that make up the flexible supercapacitor. The graphene quantum dots prepared by the present invention have abundant functional groups and good dispersion in organic solvents, and the nanofibers prepared on this basis have obvious cross-linked structures; the prepared doped graphene quantum dot nanofibers With sufficient mechanical properties, it can significantly enhance its feasibility as an electrode material for flexible supercapacitors.

Description

technical field [0001] The invention relates to a technology in the field of nanomaterials, in particular to an application of nanofibers doped with graphene quantum dots prepared by electrospinning and used as electrodes for flexible supercapacitors. Background technique [0002] In recent years, with the rise of wearable devices, flexible supercapacitors have also received more and more attention. For flexible supercapacitors, flexible electrodes are one of the key components. The current commercial activated carbon needs to add conductive agents and binders, which will increase the total mass of the device, thus limiting its application as a flexible electrode material. In contrast, carbon nanotubes and graphene can be prepared into flexible electrodes by physical and chemical methods, but the precise process and high price make them limited. Therefore, there is an urgent need to develop a flexible electrode material preparation method with low cost, simple preparation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/26H01G11/36H01G11/86
CPCH01G11/24H01G11/26H01G11/36H01G11/86Y02E60/13
Inventor 郭守武张苒沈文卓张佳利
Owner SHANGHAI JIAOTONG UNIV
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