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A solid-state electrochromic device and its preparation method and application

An electrochromic device and electrochromic technology, applied in the direction of instruments, nonlinear optics, optics, etc., can solve the problems of unfavorable large-scale production of electrochromic devices, poor corrosion resistance and chemical stability, and cumbersome preparation process, etc. Achieve the effects of reduced coloring and fading efficiency, good stability, and easy preparation process

Active Publication Date: 2019-05-14
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Liquid electrolytes can provide good electrochromic response and high ionic conductivity, but their corrosion resistance and chemical stability are poor and packaging is difficult; solid electrolytes are generally inorganic fast ion conductors and organic polyelectrolytes, but their ionic conductivity is low, The processing technology is complex, which is greatly limited in practical application, and is not conducive to the large-scale production of electrochromic devices
In addition, the existing electrochromic devices still have disadvantages such as complex structure, cumbersome preparation process, short service life and high cost.

Method used

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  • A solid-state electrochromic device and its preparation method and application
  • A solid-state electrochromic device and its preparation method and application
  • A solid-state electrochromic device and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Such as figure 1 The preparation method of a solid-state electrochromic device shown is as follows:

[0044] (1) Configuration of low-phase eutectic solvent

[0045] Choline chloride and ethylene glycol were mixed according to a certain molar ratio, and 11.2 g of choline chloride and 10 g of ethylene glycol were respectively taken in a 50 ml round bottom flask. Then heated and stirred at a constant temperature at 50° C. for 2 h to obtain a colorless transparent liquid, which was then cooled to room temperature. Finally, the obtained colorless transparent liquid was dried in a vacuum oven at 70° C. for 24 hours to obtain a choline chloride-ethylene glycol solvent, which was a low-phase eutectic solvent.

[0046] (2) Fabrication of electrochromic gel 1 and device

[0047] Take 0.5ml choline chloride-ethylene glycol solvent, add 2×10 respectively under nitrogen condition -5mol / ml of ethyl viologen and potassium ferrocyanide, ultrasonic 10min to dissolve them all. Add ...

Embodiment 2

[0055] The solid-state electrochromic device of this embodiment includes two transparent electrodes disposed opposite to each other and an electrochromic gel 1 disposed between the two transparent electrodes. The electrochromic gel 1 includes a low-phase eutectic solvent gel electrolyte , an electrochromic material uniformly dispersed in a low-phase eutectic solvent gel electrolyte and an electron donor, and two transparent electrodes are connected through a circuit. There is also a space for a silica gel pad for fixing the shape of the electrochromic gel 1 between the two transparent electrodes.

[0056] Wherein, the transparent electrode is FTO glass 2 . The low-phase eutectic solvent gel electrolyte includes a low-phase eutectic solvent and a thickener, and the mass percent content of the thickener in the low-phase eutectic solvent gel electrolyte is 8%. The low-phase eutectic solvent is formed by mixing choline chloride and urea at a molar ratio of 1:1, and the thickener ...

Embodiment 3

[0068] The solid-state electrochromic device of this embodiment includes two transparent electrodes disposed opposite to each other and an electrochromic gel 1 disposed between the two transparent electrodes. The electrochromic gel 1 includes a low-phase eutectic solvent gel electrolyte , an electrochromic material uniformly dispersed in a low-phase eutectic solvent gel electrolyte and an electron donor, and two transparent electrodes are connected through a circuit. There is also a space for a silica gel pad for fixing the shape of the electrochromic gel 1 between the two transparent electrodes.

[0069] Wherein, the transparent electrode is FTO glass 2 . The low-phase eutectic solvent gel electrolyte includes a low-phase eutectic solvent and a thickener, and the mass percentage of the thickener in the low-phase eutectic solvent gel electrolyte is 15%. The low-phase eutectic solvent is a mixture of choline chloride and ethylene glycol at a molar ratio of 1:3, and the thicken...

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Abstract

The invention relates to a solid-state electrochromic device and a preparation method and application thereof. The solid-state electrochromic device comprises two transparent electrodes arranged oppositely and electrochromic gel arranged between the two transparent electrodes, wherein the electrochromic gel contains low-phase eutectic solvent gel electrolyte, an electrochromic material evenly dispersed in the low-phase eutectic solvent gel electrolyte and an electron donor, and the two transparent electrodes are connected through a circuit. The preparation method comprises the steps of preparing a low-phase eutectic solvent, preparing the electrochromic gel and manufacturing the solid-state electrochromic device. The solid-state electrochromic device is used for manufacturing an electrochromic displayer, an electrochromic rearview mirror, electrochromic glass or electrochromic glasses. Compared with the prior art, the solid-state electrochromic device is simple in structure, low in energy consumption, good in stability, long in service life and has a very good application prospect, and the coloring and fading efficiency is reduced by only about 20% after continuous work for 24 hours (more than 1000 cycles).

Description

technical field [0001] The invention belongs to the technical field of electrochromism, and relates to a solid-state electrochromic device, a preparation method and application thereof. Background technique [0002] An electrochromic device refers to a device in which the color of an electrochromic material and its reflection or transmission intensity to incident light change reversibly as the polarity and strength of an applied electric field change, thereby controlling the intensity of solar radiation . Because electrochromic devices use only a low DC voltage (typically no more than ±5V) to change color, the device consumes very little energy. If this device is applied to the exterior wall of a building, people can actively control the intensity of the transmitted solar radiation according to changes in seasons and time, greatly saving the energy consumption of the building. Other applications include: sun glasses, car sunroofs and side windows, anti-glare rearview mirro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1516G02F1/155G02F1/1503
CPCG02F1/1503
Inventor 王荣张盛夏苏云刘俊霞郭善良
Owner SHANGHAI NORMAL UNIVERSITY