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Novel gel electrolyte and application thereof in all-solid-state electrochromic device

A gel electrolyte and all-solid-state technology, which is applied in the fields of instruments, nonlinear optics, optics, etc., can solve the problems of low electrochemical stability of the electrolyte, unfavorable environmental protection, etc., achieve good complexation ability, improve mechanical properties, high ion The effect of conductivity

Inactive Publication Date: 2020-09-04
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems existing in the prior art that the addition of organic solvents to polyoxyethylene-based polymer electrolytes is not conducive to environmental protection, the thermal curing process is cumbersome and energy-consuming, and the electrochemical stability of the electrolyte obtained by photocuring is not high. Ethylene Oxide Gel Electrolyte and Its Application in All-Solid Electrochromic Devices

Method used

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  • Novel gel electrolyte and application thereof in all-solid-state electrochromic device
  • Novel gel electrolyte and application thereof in all-solid-state electrochromic device
  • Novel gel electrolyte and application thereof in all-solid-state electrochromic device

Examples

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Embodiment 1

[0027] The polyethylene oxide-based gel electrolyte provided in Example 1 includes 90wt% polyethylene glycol methyl ether methacrylate, 3wt% lithium perchlorate and 7wt% 2-hydroxyl-2-methyl-1 - Phenylacetone.

[0028] Its preparation process is specifically:

[0029] Step 1. Weigh polyethylene glycol methyl ether methacrylate and lithium perchlorate, and grind them in a quartz mortar for 30 minutes to form a uniform and transparent solution A; then add 2-hydroxy-2-methanol to solution A Base-1-phenylacetone, stirred at room temperature for 15min to obtain a uniform and transparent solution B; wherein, the content of polyethylene glycol methyl ether methacrylate was 90wt%, and the content of lithium perchlorate was 3wt% , the content of 2-hydroxyl-2-methyl-1-phenylacetone is 7wt%;

[0030] Step 2. Select a smooth and flat quartz substrate that has been washed with ethanol and ultrasonic, and stick waterproof tape around it to form a groove area with a depth of 1.0mm; add the ...

Embodiment 2

[0042] The polyethylene oxide-based gel electrolyte provided in Example 2 includes 88 wt% polyethylene glycol diacrylate, 4 wt% lithium tetrafluoroborate and 8 wt% 1-hydroxycyclohexyl phenyl ketone. Its preparation process is identical with embodiment 1.

Embodiment 3

[0044] The polyethylene oxide-based gel electrolyte provided in Example 3 includes 90wt% acrylate polymer with polyethylene oxide as the main chain, 5wt% lithium salt and 5wt% photoinitiator. Wherein, the acrylate polymer with polyethylene oxide as the main chain is a mixed solution of polyethylene glycol methyl ether methacrylate and polyethylene glycol diacrylate with a mass ratio of 1:1, and the lithium salt is Bisoxalate lithium borate, the photoinitiator is 2,4,6-trimethylbenzoyl-diphenylphosphine oxide. Its preparation process is identical with embodiment 1.

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Abstract

The invention discloses a novel gel electrolyte and application thereof in an all-solid-state electrochromic device, and relates to the technical field of electrochromic devices. The gel electrolyte comprises 85 wt% to 92 wt% of an acrylate polymer with polyoxyethylene as a main chain, 2 wt% to 5 wt% of lithium salt and 3 wt% to 10 wt% of a photoinitiator. According to the invention, the acrylatepolymer taking polyoxyethylene as a main chain is used as a matrix material of the electrolyte, the terminal group of the polymer is an acrylate group which can be cross-linked and polymerized under ultraviolet light, and the polymer has good mechanical properties after being irradiated by ultraviolet light; meanwhile, the polymer takes polyoxyethylene as a main chain and has good complexing capability with lithium ions and dissociation capability with the lithium ions, so that the ionic conductivity of the electrolyte is effectively improved; and in addition, the polymer is kept in a transparent and clear state before and after ultraviolet curing, and the discoloration process of an electrochromic device is not interfered during application.

Description

technical field [0001] The invention relates to the technical field of electrochromic devices, in particular to a polyethylene oxide-based gel electrolyte and its application in all-solid-state electrochromic devices. Background technique [0002] Electrochromic materials since the discovery of amorphous WO by S.K.Deb in 1969 3 After the electrochromic performance of the thin film, it aroused great interest of the scientific research community, and also set off a wave of research on electrochromic materials at that time. After years of research on electrochromic materials, electrochromic technology is mainly used in electrochromic smart windows, electrochromic display devices, and aerospace thermal control systems. Electrochromic smart windows can change their own transmittance to achieve the effect of controlling indoor temperature, which has always been regarded as a promising research direction. [0003] Nowadays, the energy crisis has become an inevitable problem, and ...

Claims

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Application Information

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IPC IPC(8): G02F1/15
CPCG02F1/15G02F2001/164
Inventor 贾春阳王懋通
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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