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Preparation method of multi-color electrochromic thin film with tin dioxide/vanadium pentoxide core-shell structure

A technology of vanadium pentoxide and tin dioxide, which is applied in the field of preparation of multi-color electrochromic thin films, can solve the problems of low conductivity and ion diffusion coefficient, low coloring efficiency, poor cycle reversibility and stability, and achieve good Implementability, improved stability, and accelerated reaction kinetics

Active Publication Date: 2019-06-14
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, vanadium pentoxide thin films also have some disadvantages in electrochromic devices, such as poor cycle reversibility and stability, low conductivity and ion diffusion coefficient, low coloring efficiency, etc.

Method used

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  • Preparation method of multi-color electrochromic thin film with tin dioxide/vanadium pentoxide core-shell structure
  • Preparation method of multi-color electrochromic thin film with tin dioxide/vanadium pentoxide core-shell structure
  • Preparation method of multi-color electrochromic thin film with tin dioxide/vanadium pentoxide core-shell structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation of multicolor electrochromic film with tin dioxide / vanadium pentoxide core-shell structure:

[0040] (1) FTO conductive glass (produced by Shenzhen Huanan Xiangcheng Technology Co., Ltd.) was ultrasonically cleaned in deionized water for 20 minutes, then dried in an oven at 60°C, and treated in a plasma cleaning machine for 5 minutes before use;

[0041] (2) Dissolve 1g urea, 1mL (37wt%) hydrochloric acid, and 20μL thioglycolic acid in 80mL deionized water successively, stir for 5 minutes, then add 0.2g of stannous chloride dihydrate to it, and stir for 10 minutes to form a uniform The precursor solution;

[0042] (3) The precursor solution in step (2) is added to the autoclave, and the conductive substrate is placed obliquely and immersed in the precursor solution with the FTO conductive surface facing down. Hydrothermal reaction was carried out in an oven at 120℃ for 6h. After the reaction was completed, the water was cooled to room temperature 25℃. The sample w...

Embodiment 2

[0047] Preparation of multicolor electrochromic film with tin dioxide / vanadium pentoxide core-shell structure:

[0048] (1) FTO conductive glass (produced by Shenzhen Huanan Xiangcheng Technology Co., Ltd.) was ultrasonically cleaned in deionized water for 20 minutes, then dried in an oven at 60°C, and treated in a plasma cleaner for 5 minutes before use:

[0049] (2) Dissolve 1g urea, 1mL (37wt%) hydrochloric acid, and 20μL thioglycolic acid in 80mL deionized water successively, stir for 5 minutes, then add 0.2g of stannous chloride dihydrate to it, and stir for 10 minutes to form a uniform The precursor solution;

[0050] (3) The precursor solution in step (2) is added to the autoclave, and the conductive substrate is placed obliquely and immersed in the precursor solution with the FTO conductive surface facing down. Hydrothermal reaction was carried out in an oven at 120℃ for 6h. After the reaction was completed, the water was cooled to room temperature 25℃. The sample was taken ...

Embodiment 3

[0055] Preparation of multicolor electrochromic film with tin dioxide / vanadium pentoxide core-shell structure:

[0056] (1) The conductive carbon cloth film was ultrasonically cleaned in deionized water for 20 minutes, then dried in an oven at 60°C, and treated in a plasma cleaner for 5 minutes before use:

[0057] (2) Dissolve 1g urea, 1mL (37wt%) hydrochloric acid, and 20μL thioglycolic acid in 80mL deionized water successively, stir for 5 minutes, then add 0.2g of stannous chloride dihydrate to it, and stir for 10 minutes to form a uniform The precursor solution;

[0058] (3) The precursor solution in step (2) is added to the autoclave, and the conductive substrate is placed obliquely and immersed in the precursor solution with the FTO conductive surface facing down. Hydrothermal reaction was carried out in an oven at 120℃ for 6h. After the reaction was completed, the water was cooled to room temperature 25℃. The sample was taken out, rinsed and dried overnight, and heat treated ...

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Abstract

The invention provides a preparation method of a multi-color electrochromic thin film with a tin dioxide / vanadium pentoxide core-shell structure. The preparation method comprises the following steps that a stannous chloride dihydrate compound is dissolved into an aqueous solution of hydrochloric acid and mercaptoacetic acid, then the mixture is added into a reaction kettle with a conductive substrate, and after hydrothermal reaction, high-temperature heat treatment is carried out to obtain a uniformly-grown tin dioxide nanosheet array; and vanadyl sulfate hydrate is treated as a vanadium source, vanadium pentoxide is deposited on the tin dioxide nanosheet array by using a constant potential method, and finally heat treatment is carried out in the air to obtain the multi-color electrochromic thin film with the core-shell structure. According to the preparation method, tin dioxide nanosheets are perpendicular to the substrate, grow uniformly and are distributed uniformly, and the vanadium pentoxide uniformly fills gaps of the nanosheets and is coated on the surfaces of the nanosheets. The composite thin film has excellent cycling stability and electrochromic performance, the rapid reversible transformation can be realized among blue, green and yellow, and the thin film is expected to be applied to the field of self-adaptive camouflage of marine, oasis and desert environments.

Description

Technical field [0001] The invention relates to the technical field of electrochromic films, in particular to a preparation method of a multicolor electrochromic film with a tin dioxide / vanadium pentoxide core-shell structure. Background technique [0002] Electrochromism is defined as a phenomenon in which the optical properties of materials change reversibly under the action of different applied voltages. This phenomenon is caused by the redox reaction of ions or electrons in the process of inserting and extracting from the material. In the past few decades, the pace of research on electrochromic materials has never stopped, and great developments have been made in theory and practice. Now, electrochromic materials are used in many fields due to their special optical modulation function, such as smart windows, color-changing glasses, energy-saving information displays and adaptive camouflage. The application of electrochromic materials to the field of camouflage is a huge chal...

Claims

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Application Information

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IPC IPC(8): C23C28/04C23C18/12C25D9/04C03C17/00C03C17/25C03C17/34
Inventor 涂江平赵根锋王伟齐王秀丽夏新辉谷长栋
Owner ZHEJIANG UNIV
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