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Electrically conductive polymer-graphene composite electrochromic film and preparation method thereof

A technology of conductive polymer and graphene film, which is applied in the field of composite electrochromic film and its preparation, can solve the problems of poor electrode conductivity, no change in response time and contrast, and low quality of composite film, so as to achieve easy transfer and simple operation , the effect of controllable film thickness

Active Publication Date: 2015-10-14
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Shi Gaoquan et al. (Polymer52.2011.5567-5572) prepared a graphene oxide-polyaniline (PIAN) multilayer composite electrochromic film by a solution self-assembly method. The electrochromic cycle stability of the film was improved, but the response time and contrast did not change, on the one hand, it may be because it is directly deposited on the quartz glass plate, the conductivity of the electrode is poor, and on the other hand, it may be because the composite film obtained by self-assembly of this solution is not of high quality

Method used

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  • Electrically conductive polymer-graphene composite electrochromic film and preparation method thereof
  • Electrically conductive polymer-graphene composite electrochromic film and preparation method thereof
  • Electrically conductive polymer-graphene composite electrochromic film and preparation method thereof

Examples

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Embodiment 1

[0033] The conductive polymer monomer is 4,4',4"-tris(bithiophene)triphenylamine (TBTPA)

[0034] (1) Preparation of conductive polymer film: Mix 50ml of electrolytic solvent acetonitrile and dichloromethane (volume ratio 3:7), monomer (0.0276g, 0.75mM) and supporting electrolyte tetrabutylammonium perchlorate (TBAP , 1.71g, 0.1M) were uniformly mixed and prepared as an electrolyte, and then added to a three-electrode electrolytic cell, wherein the working electrode was an ITO glass electrode (its size was 0.9×4cm), the auxiliary electrode was a platinum electrode, and the reference electrode was silver - Silver chloride electrodes. Under the condition of 1.2V, the constant potential method is used to carry out the polymerization reaction. When the power consumption of the polymerization reaches 0.06C, the polymerization ends, and a layer of blue polymer film is deposited on the surface of the working electrode ITO conductive glass. When the potential is controlled to -0.6V, ...

Embodiment 2

[0038] The monomer is replaced by 1,4-di(3-thienyl)benzene (DTB)

[0039] (1) Preparation of conductive polymer film: 50ml of electrolytic solvent dichloromethane, monomer (0.0242g, 2mM) and supporting electrolyte tetrabutylammonium perchlorate (TBAP, 1.71g, 0.1M) were evenly mixed to prepare electrolyte , and then added to a three-electrode electrolytic cell, wherein the working electrode is ITO glass (its size is 0.9 × 4cm), the auxiliary electrode is a platinum electrode, and the reference electrode is a silver-silver chloride electrode. Under the condition of polymerization potential 1.3V, the polymerization reaction is carried out by constant potential method. When the power consumption of polymerization reaches 0.04C, the polymerization ends, and a layer of yellow polymer film is deposited on the surface of the working electrode ITO glass electrode. When the potential is controlled to -0.6V , dedoped the working electrode after the polymerization reaction for 100s, and f...

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Abstract

The invention discloses an electrically conductive polymer-graphene composite electrochromic film. A preparation method of the film comprises the following steps: with an electrochemical polymerization method, a layer of electrically conductive polymer film is deposited on an electrically conductive substrate; a graphene oxide water solution is prepared with a modified Hummers method, and a graphene film is prepared with a metal base self-assembly synchronous reduction method; and the surface of the electrically conductive polymer film is covered by the graphene film with a Czochralski method, such that the composite electrochromic film is obtained. The composite electrochromic film provided by the invention has an innovative structure and excellent performances. The preparation method is simple.

Description

(1) Technical field [0001] The invention relates to a composite electrochromic film and a preparation method thereof, in particular to a conductive polymer-graphene composite electrochromic film and a preparation method thereof. The film has a wide range of applications in fields such as smart windows, displays, electronic paper, and capacitors potential applications. (2) Background technology [0002] Electrochromism refers to the fact that under the action of an external electric field, due to the redox reaction or the injection or extraction process of charges (electrons or ions), the optical properties of materials (including transmittance, absorptivity and reflectivity, etc.) are within the range of visible light wavelengths. A reversible transformation occurs, and its macroscopic performance is that the color of the material has a reversible transformation with the action of an external electric field. In 1961, Platt proposed the concept of electrochromism for the fir...

Claims

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Application Information

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IPC IPC(8): C03C17/42
Inventor 张诚闫拴马吕晓静欧阳密戴玉玉蔡志威
Owner ZHEJIANG UNIV OF TECH
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