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Graphene/poly (3, 4-ethylenedioxythiophene) self-supporting film and preparation method thereof

A technology of ethylenedioxythiophene and self-supporting film, which is applied in the manufacture of hybrid/electric double layer capacitors and electrodes of hybrid capacitors, can solve the problems of high cost of current collectors, poor cycle stability, and poor specific capacity, and achieve the goal of reducing costs Effect

Inactive Publication Date: 2019-10-18
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of high current collector cost, poor specific capacity and poor cycle stability when the composite material composed of graphene and conductive polymer is applied to the flexible electrode material of supercapacitor, the purpose of the present invention is to provide A graphene / poly(3,4-ethylenedioxythiophene) self-supporting film C-PEDOT / f-rGO and a preparation method thereof, the self-supporting film of the present invention can not only throw away the current collector and directly use it as an electrode, but also has High specific capacity and cycle stability

Method used

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  • Graphene/poly (3, 4-ethylenedioxythiophene) self-supporting film and preparation method thereof
  • Graphene/poly (3, 4-ethylenedioxythiophene) self-supporting film and preparation method thereof
  • Graphene/poly (3, 4-ethylenedioxythiophene) self-supporting film and preparation method thereof

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Embodiment 1

[0031] Add flake graphite powder to H 2 SO 4 Add potassium persulfate and phosphorus pentoxide slowly, and stir at 70°C, filter and wash the reaction mixture with deionized water, and dry to obtain the pre-oxidized product; add the pre-oxidized product and sodium nitrate to H 2 SO 4 , add KMnO under ice-water bath 4 , stirred at 30°C for 3 hours, took it out and put it in an ice-water bath, added 100mL of deionized water and 4mL of H 2 o 2 , using deionized water for centrifugal washing, adding a certain amount of deionized water to obtain a graphene oxide aqueous dispersion.

[0032] 10mg·mL in 3mL -1 Add 3,4-ethylenedioxythiophene monomer to the graphene oxide according to the mass ratio of graphene oxide to 3,4-ethylenedioxythiophene of 10:1, and stir for 30 minutes to obtain a mixed dispersion. Add 2mgFeCl to it 3 , shaking to form graphene oxide hydrogel. Also use a scraper with a height of 520 μm to scrape the graphene oxide hydrogel on the hydrophilic glass subs...

Embodiment 2

[0039] Add flake graphite powder to H 2 SO 4 Add potassium persulfate and phosphorus pentoxide slowly, and stir at 90°C, filter and wash the reaction mixture with deionized water, and dry to obtain the pre-oxidized product; add the pre-oxidized product and sodium nitrate to H 2 SO 4 , add KMnO under ice-water bath 4 , stirred at 30-50°C for 2 hours, took it out and put it in an ice-water bath, added 80mL of deionized water and 4mL of H 2 o 2 , using deionized water for centrifugal washing, adding a certain amount of deionized water to obtain a graphene oxide aqueous dispersion.

[0040] 5mg·mL in 4mL -1 3,4-ethylenedioxythiophene monomer was added to the graphene oxide according to the mass ratio of graphene oxide and 3,4-ethylenedioxythiophene being 10:2, and stirred for 30 minutes to obtain a mixed dispersion. Add 3mgFeCl to it 3 , shaking to form graphene oxide hydrogel. Also use a scraper with a height of 520 μm to scrape the graphene oxide hydrogel on the hydrophi...

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Abstract

The invention discloses graphene / poly (3, 4-ethylenedioxythiophene) self-supporting film and a preparation method thereof. The preparation method of the self-supporting film comprises the following steps of (1) adding a 3,4-ethylenedioxythiophene monomer into a graphene oxide aqueous dispersion, stirring to obtain a mixed dispersion liquid, then adding FeCl3, and oscillating to form hydrogel; (2)using a scraper to apply the hydrogel to a hydrophilic-based glass substrate by a scraping coating method, and uniformly forming a film; (3) putting the uniformly-formed material into a mixed solutionof hydroiodic acid and acetic acid for soaking, and then heating and reacting, and repeatedly washing with deionized water and ethyl alcohol for several times separately, and finally carrying out freeze drying on the material to finally obtain the graphene / poly (3, 4-ethylenedioxythiophene) self-supporting film material (C-PEDOT / f-rGO). The self-supporting film disclosed by the invention can be used for removing a current collector to be directly used as an electrode, and has relatively high specific capacity and cycling stability.

Description

technical field [0001] The invention belongs to the technical field of self-supporting films, in particular to a graphene / poly(3,4-ethylenedioxythiophene) self-supporting film and a preparation method thereof. Background technique [0002] In recent years, the development of wearable and flexible electronic devices, in which energy storage devices that provide energy also need to be developed for flexibility. Among them, flexible supercapacitors have received more attention. How to prepare flexible electrode materials with certain mechanical strength has become one of the research hotspots. In addition, the specific capacity and stability of electrode materials are still a major problem restricting the development of supercapacitors. [0003] Due to its unique two-dimensional structure and excellent mechanical and electrical properties, graphene has been widely studied and applied in electronics, energy and biochemistry. At present, people have prepared a variety of graphe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/26H01G11/30H01G11/36H01G11/48H01G11/86
CPCH01G11/26H01G11/30H01G11/36H01G11/48H01G11/86Y02E60/13
Inventor 刘军磊张凯立张诚许若腾罗俊涛
Owner ZHEJIANG UNIV OF TECH
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