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Electrochromic device based on polyvinyl alcohol-polyacrylic acid hydrogel electrolyte and preparation method and application thereof

An electrochromic device, polyacrylic acid technology, applied in instruments, nonlinear optics, optics, etc., can solve problems that are rarely reported in the field of electrochromism, achieve excellent electrochemical and thermal stability, excellent comprehensive performance, huge The effect of applying the foreground

Inactive Publication Date: 2021-05-07
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, there were studies on the blending of PVA and PAA to prepare hydrogels, which were applied in the fields of artificial muscles, osmotic separation, stimulus response, etc., but there were few reports on the research in the field of electrochromism

Method used

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  • Electrochromic device based on polyvinyl alcohol-polyacrylic acid hydrogel electrolyte and preparation method and application thereof
  • Electrochromic device based on polyvinyl alcohol-polyacrylic acid hydrogel electrolyte and preparation method and application thereof
  • Electrochromic device based on polyvinyl alcohol-polyacrylic acid hydrogel electrolyte and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] refer to Figure 1 ~ Figure 3 , an electrochromic device based on polyvinyl alcohol-polyacrylic acid hydrogel electrolyte, the electrochromic device is a layered structure, and the layered structure is a transparent conductive electrode 1, an electrochromic layer, an electrolyte layer, an ion storage layer and a transparent conductive electrode 2, wherein the transparent conductive electrode 1 is indium tin oxide (ITO) glass or polyethylene terephthalate (ITO-PET), and the conductive electrode 2 is ITO glass or ITO-PET, the electrochromic layer is a thiophene polymer, the ion storage layer is poly(3,4-ethylenedioxythiophene) (PEDOT), and the electrolyte layer is polyvinyl alcohol - Polyacrylic acid (PVA-PAA) hydrogel electrolyte.

[0036] A preparation method of an electrochromic device based on PVA-PAA hydrogel electrolyte, comprising the following steps:

[0037] (1) Add polyvinyl alcohol and polyacrylic acid with a mass ratio of 20:1 to the solvent and dissolve at ...

Embodiment 2

[0042] refer to Figure 1 to Figure 5 , a kind of preparation method of the electrochromic device based on PVA-PAA hydrogel electrolyte, comprises the following steps:

[0043] (1) Add polyvinyl alcohol and polyacrylic acid with a mass ratio of 20:1 to the solvent and dissolve at 120°C to obtain polyvinyl alcohol-polyacrylic acid PVA-PAA; LiClO 4 Add to the above solution (polyvinyl alcohol-polyacrylic acid PVA-PAA), the mass ratio of polyvinyl alcohol-polyacrylic acid PVA-PAA to electrolyte is 1:0.150, pour the resulting solution into a mold, and freeze-thaw at -18°C 18h, the PVA-PAA hydrogel electrolyte was obtained;

[0044] (2) In the three-electrode system (including reference electrode, auxiliary electrode, and working electrode), 0.75mmol / L bithiophenetriphenylamine (TBTPA), electrolyte, and organic solvent are used as the electrolyte, and the transparent conductive substrate ITO glass is used as the electrolyte. The working electrode is a 1.2V constant potential, -0....

Embodiment 3

[0048] refer to Figure 1 ~ Figure 3 , a kind of preparation method of the electrochromic device based on PVA-PAA hydrogel electrolyte, comprises the following steps:

[0049] (1) Add polyvinyl alcohol and polyacrylic acid with a mass ratio of 20:1 to the solvent and dissolve at 120°C to obtain polyvinyl alcohol-polyacrylic acid PVA-PAA; LiClO 4 Add to the above solution (polyvinyl alcohol-polyacrylic acid PVA-PAA), the mass ratio of polyvinyl alcohol-polyacrylic acid PVA-PAA to electrolyte is 1:0.225, pour the resulting solution into a mold, and freeze-thaw at -18°C 3h, the PVA-PAA hydrogel electrolyte is obtained;

[0050] (2) In the three-electrode system (including reference electrode, auxiliary electrode, and working electrode), 0.75mmol / L bithiophenetriphenylamine (TBTPA), electrolyte, and organic solvent are used as the electrolyte, and the transparent conductive substrate ITO glass is used as the electrolyte. The working electrode is a 1.2V constant potential, -0.6V ...

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Abstract

The present invention provides an electrochromic device based on polyvinyl alcohol-polyacrylic acid hydrogel electrolyte and a preparation method and application thereof. The electrochromic device based on the polyvinyl alcohol-polyacrylic acid hydrogel electrolyte is of a layered structure, and the layered structure sequentially comprises a transparent conductive electrode 1, an electrochromic layer, an electrolyte layer, an ion storage layer and a transparent conductive electrode 2 from top to bottom. The invention also provides a preparation method of the electrochromic device based on the polyvinyl alcohol-polyacrylic acid hydrogel electrolyte, and the preparation method comprises the steps of preparing the polyvinyl alcohol-polyacrylic acid hydrogel electrolyte with high transmittance, high ionic conductivity and excellent electrochemical and thermal stability, and assembling the electrochromic device by using the polyvinyl alcohol-polyacrylic acid hydrogel electrolyte as the electrolyte. The device disclosed by the invention is simple in preparation process, energy-saving and environment-friendly, can realize great change of color and transmittance under an external electric field, is excellent in comprehensive performance, and has a huge application prospect in the fields of intelligent windows, energy-saving glass and the like.

Description

technical field [0001] The invention relates to an electrochromic device based on polyvinyl alcohol-polyacrylic acid hydrogel electrolyte, its preparation method and application. Background technique [0002] Electrochromism means that when a certain voltage is applied, a material undergoes a redox reaction, resulting in a change in its optical absorption rate, transmittance or reflectance, and the appearance is reflected in a reversible change in color and transmittance. Therefore, electrochromic materials and devices have broad application prospects in displays, electronic paper, smart windows, and military camouflage. [0003] A typical electrochromic device is composed of five layers: transparent conductive electrode-electrochromic layer-electrolyte layer-ion storage layer-transparent conductive electrode. Among them, the electrolyte layer, as an important part of the electrochromic device, plays the role of ion conduction and electronic insulation, forms a built-in ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/15
CPCG02F1/15G02F2001/164
Inventor 吕晓静许志怡张诚
Owner ZHEJIANG UNIV OF TECH