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Safe, environment-friendly and high-performance electrochromic film and preparation method thereof

An electrochromic, safe and environmentally friendly technology, applied in nonlinear optics, instruments, optics, etc., can solve the problems of limited application of aqueous electrolytes, small pore size, unsuitable for multivalent cation deintercalation, etc., to increase reactive sites. , Prevent agglomeration, reduce the effect of static electricity

Active Publication Date: 2021-01-22
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, most of the reported electrochromic materials are based on monovalent cations (such as H + , Li + etc.) ions with smaller diameters are used as deintercalation ions, and their structures are mostly dense and the pore size is small, which is not suitable for deintercalation of multivalent cations with strong electrostatic interaction with the frame, which limits the application of aqueous electrolytes

Method used

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  • Safe, environment-friendly and high-performance electrochromic film and preparation method thereof
  • Safe, environment-friendly and high-performance electrochromic film and preparation method thereof

Examples

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Effect test

Embodiment 1

[0028] A method for preparing a safe, environment-friendly and high-performance electrochromic material, the specific steps are as follows:

[0029] Step 1 Prepare the precursor solution at room temperature: Take 0.083g of terephthalic acid (0.5mmol) and 0.119g of nickel chloride hexahydrate (0.5mmol) and dissolve them in 20ml of N,N-dimethylformamide under stirring at room temperature. 1 mL of ultrapure water was slowly added to the solution during stirring.

[0030] Step 2 Transfer the precursor solution obtained in step 1 to a stainless steel autoclave, soak and fix 2*2.5 ITO conductive glass vertically in the precursor solution for 3 hours at 120°C, and cool to room temperature after the reaction. After washing, the sample was heated to 450°C in an argon atmosphere, and kept at 450°C for 120 minutes, then replaced with air for argon, and continued to heat for 30 minutes, the film changed from light green to light brown, and the performance of the test was obtained. NiO el...

Embodiment 2

[0033] Step 1 Prepare the precursor solution at room temperature: Take 0.083g of terephthalic acid (0.5mmol) and 0.119g of nickel chloride hexahydrate (0.5mmol) and dissolve them in 20ml of N,N-dimethylformamide under stirring at room temperature. 1 mL of ultrapure water was slowly added to the solution during stirring.

[0034] Step 2 Transfer the precursor solution obtained in step 1 to a stainless steel autoclave, soak and fix 2*2.5 ITO conductive glass vertically in the precursor solution for 3 hours at 120°C, and cool to room temperature after the reaction. After washing, the sample was heated to 450°C in an argon atmosphere, and kept at 450°C for 120 minutes, then replaced with air for argon, and continued to heat for 30 minutes, the film changed from light green to light brown, and the performance of the test was obtained. NiO electrochromic film.

[0035] In step 3, the thin film obtained in step 2 is used as the working electrode, the platinum wire is used as the cou...

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Abstract

The invention discloses a method for preparing and testing a safe, environment-friendly and high-performance electrochromic film capable of being applied to an aqueous electrolyte, and belongs to thefield of electrochromic materials. The electrochromic film is a NiO thin film based on Ni-MOF and is of a spherical structure formed by stacking porous nanosheets, a material can be deposited on an ITO substrate through a simple hydrothermal method and vertically grows on the ITO substrate, and the diameter of the electrochromic film is about 2-10 micrometers. An MOF derivative is used as an electrochromic material, the porous structure of the MOF derivative enables the MOF derivative to be applied to an aqueous electrolyte system, the requirement for equipment is low, raw materials are simpleand easy to obtain, and the manufacturing cost is low. The possibility is provided for preparing the water system electrochromic device with excellent performance, no toxicity, no pollution and low cost.

Description

technical field [0001] The invention belongs to the field of electrochromic thin films, and in particular relates to a safe, environment-friendly and high-performance electrochromic material suitable for water-based electrolytes and a preparation method thereof. Background technique [0002] Electrochromism refers to the stable and reversible color change of materials under the action of an external electric field, changing the optical properties of materials, such as reflectivity, absorptivity, etc., so as to realize the active adjustment of solar radiation transmittance. The excellent characteristics of electrochromic glass for light regulation and low energy consumption make it widely used not only in architectural smart glass, but also in aerospace, automotive rearview mirrors, wearable devices, etc. Advantage. [0003] Traditional electrochromic electrolytes are mainly organic electrolytes, but organic electrolytes have a big disadvantage, they are usually highly toxic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1524G02F1/1523
CPCG02F1/1525G02F1/1524
Inventor 贾希来巨小倩
Owner UNIV OF SCI & TECH BEIJING
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