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Electrochromic nonmetallic salt electrolyte composite material, preparation method and application

An electrochromic and composite material technology, applied in nonlinear optics, optics, instruments, etc., can solve the problems of complex structure, poor performance and poor stability of electrochromic devices, and achieve rich color types, simple structure, and safety. high sex effect

Inactive Publication Date: 2020-06-05
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide an electrochromic non-metal salt electrolyte composite material in order to solve the problems of poor stability, unsafe, complex structure, high cost and poor performance of electrochromic devices in the prior art , preparation method and application

Method used

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  • Electrochromic nonmetallic salt electrolyte composite material, preparation method and application
  • Electrochromic nonmetallic salt electrolyte composite material, preparation method and application
  • Electrochromic nonmetallic salt electrolyte composite material, preparation method and application

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preparation example Construction

[0025] A preparation method of an electrochromic non-metal salt electrolyte composite material, comprising the following steps:

[0026] Step i, preparing tungsten oxide sol;

[0027] According to the present invention, the preparation of the tungsten oxide sol is not particularly limited, it can be prepared by a known preparation method in the art, preferably by ion exchange, and the specific method is preferably:

[0028] Activate the ion exchange resin before use, specifically: put the resin into a chromatography column, pass through the resin layer with hydrochloric acid with a concentration of 3.0M at a flow rate of 3M / h, and then use a volume of 1.5-2.5% of the resin volume. times, concentration of 2.0-2.5M sulfuric acid soaked for more than 3 hours, and then 0.5M concentration of Na 2 WO 4 The aqueous solution flows through the ion exchange resin to obtain tungsten oxide sol.

[0029] Step ii, preparing amino or substituted amino-modified carbon nanodots;

[0030] A...

Embodiment 1

[0038] (1) Tungsten oxide sol is prepared by ion exchange. The main materials and reagents are: ion exchange resin, sodium tungstate hydrate (Na 2 WO 4 ·2H2O), deionized water (resistivity 18.2MΩ·cm), absolute ethanol (C2H5OH).

[0039] Activate the ion exchange resin before use, specifically: put the resin into a chromatographic column, pass through the resin layer with hydrochloric acid with a concentration of 3.0M at a flow rate of 3M / h, and then use a volume of 1.5-2.5% of the resin volume. times, concentration of 2.0-2.5M sulfuric acid soaked for more than 3 hours, and then 0.5M concentration of Na 2 WO 4 The aqueous solution flows through the ion exchange resin to obtain tungsten oxide sol.

[0040] (2) Carbon nanodots are synthesized by microwave method, and the materials used include: citric acid (C 6 h 8 o 7 ·H 2 O), urea (CH 4 N 2 O), deionized water (resistivity 18.2MΩ·cm).

[0041] Specific preparation method: put 3g of citric acid and 3g of urea in 10mL ...

Embodiment 2

[0049] Prepare the electrochromic non-metallic salt electrolyte composite material in the same manner as in Example 1, the difference is that in WO 3 The volume ratio of sol and ethanol is 5:1, which is recorded as device-2.

[0050] After characterization, the optical contrast ratio of the electrochromic device obtained in the present embodiment 2 is slightly lower than that in embodiment 1, which is 38%, and the coloring and fading response times are shortened, which are respectively 15s and 78s. The transmittance curve is as figure 1 shown.

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Abstract

The invention provides an electrochromic nonmetallic salt electrolyte composite material, a preparation method and application, and belongs to the field of electrochromic electrolyte material synthesis. The method comprises the following steps: preparing tungsten oxide sol; then preparing amino or substituted amino modified carbon nanodots; and mixing the amino or substituted amino modified carbonnanodots with tungsten oxide sol, and adding a stabilizer to obtain the electrochromic nonmetallic salt electrolyte composite material. The invention also provides the electrochromic nonmetallic saltelectrolyte composite material obtained by the preparation method. The invention also provides an application of the electrochromic nonmetal salt electrolyte composite material in an electrochromic device. The electrochromic device provided by the invention can realize reversible conversion between yellow and green, and enriches the color types of inorganic electrochromic materials.

Description

technical field [0001] The invention belongs to the field of synthesis of electrochromic electrolyte materials, and in particular relates to an electrochromic non-metallic salt electrolyte composite material, a preparation method and an application. Background technique [0002] Electrochromism refers to the phenomenon that the optical properties of materials (absorption rate, transmittance or reflectance, etc.) undergo stable and reversible changes under the action of an external electric field, and the appearance shows reversible changes in color and transparency. In recent years, the development of electrochromic devices (Electrochromic devices, ECDs) has been extremely rapid, and great progress has been made in the fields of smart windows, displays, anti-counterfeiting, military camouflage, etc., and some products such as smart windows, anti-glare rearview mirrors, etc. It has been industrialized, but its high price limits the further promotion of electrochromic products...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1524G02F1/1523G02F1/15C01G41/02C01B32/15
CPCC01B32/15C01G41/02G02F1/15G02F1/1524G02F1/1525
Inventor 吕营刘星元郭晓阳范翊胡永生林杰李颜涛
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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