Zinc ion driven titanium dioxide electrochromic device and preparation method thereof

An electrochromic device, titanium dioxide technology, applied in the direction of instruments, nonlinear optics, optics, etc., to achieve the effect of excellent device performance

Active Publication Date: 2021-01-22
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, there have been no reports on Zn ion driven titanium dioxide electrochromic and its devices. The development of Zn ion driven titanium dioxide electrochromic materials and the construction of safe and low-cost electrochromic devices have significant scientific significance and huge applications. value

Method used

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  • Zinc ion driven titanium dioxide electrochromic device and preparation method thereof
  • Zinc ion driven titanium dioxide electrochromic device and preparation method thereof
  • Zinc ion driven titanium dioxide electrochromic device and preparation method thereof

Examples

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preparation example Construction

[0050] The above-mentioned preparation method of zinc ion-driven titanium dioxide electrochromic device comprises the following steps:

[0051] S1. Preparation of tungsten-doped titanium dioxide solution; the tungsten-doped titanium dioxide solution prepared in this step is in a stable colloidal solution state, which is suitable for solution processing.

[0052] Specifically, the step S1 includes:

[0053] S1-1. Preparation of Ti precursor solution: mix titanium compound and octadecene and heat in an inert gas atmosphere to form a Ti precursor solution; the volume ratio of the amount of titanium compound to octadecene is 0.5- 3mol / L (specifically, the volume ratio of the amount of titanium compound and octadecene can be 0.5 or 1 or 2 or 3mol / L, etc.); the titanium compound is tetraethyl titanate or titanium tetrachloride or One or a combination of tetrabutyl titanate or isopropyl titanate; the inert gas is one or a combination of argon, nitrogen or helium; the heating tempera...

Embodiment 1

[0067] A preparation method of a zinc ion-driven titanium dioxide electrochromic device, comprising the steps of:

[0068] S1. Preparation of tungsten-doped titanium dioxide solution; including:

[0069] S1-1. Preparation of Ti precursor solution: Mix 30mmol tetraethyl titanate and 30mL octadecene, heat at 120°C for 1 hour under an inert gas atmosphere, and form a light yellow transparent oil phase solution, namely Ti precursor solution ;

[0070] S1-2. Mix 0mmol tungsten chloride, 0.5mL oleic acid, 0.5mL oleylamine, 8mL octadecene, 15mg ammonium fluoride, 2.7g stearyl alcohol and 1mL Ti precursor solution formed in step S1-1 and add to In the three-neck flask, stir magnetically under vacuum atmosphere and heat to 120°C, keep for 20 minutes to form a transparent solution; then raise the temperature to 280°C, keep for 1 hour to form a dark blue solution;

[0071] S1-3. Naturally cool the solution obtained in step S2 to 60°C, then add n-hexane and acetone until flocs appear; c...

Embodiment 2

[0077] The difference between the preparation method of this example and the example is that the amount of tungsten chloride in step S1-2 is 0.05 mmol, and other steps are the same.

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Abstract

The invention relates to the technical field of electrochromic devices, in particular to a zinc ion driven titanium dioxide electrochromic device and a preparation method thereof. The device is of a sandwich structure with a tungsten-doped titanium dioxide nanocrystalline film/zinc sheet/tungsten-doped titanium dioxide nanocrystalline film, a zinc-based electrochromic device is constructed, and the performance of the device is excellent. The preparation method comprises the following steps: preparing a tungsten-doped titanium dioxide solution; forming a tungsten-doped titanium dioxide film (6), and performing packaging; and injecting zinc sulfate electrolyte into the accommodating space. Zinc ions in the zinc sulfate electrolyte are embedded into/separated from the tungsten-doped titaniumdioxide film under the driving of an electric field, so that the color changing function of the device is realized, and the process is simple.

Description

technical field [0001] The invention relates to the technical field of electrochromic devices, in particular to a zinc ion driven titanium dioxide electrochromic device and a preparation method thereof. [0002] technical background [0003] Electrochromism refers to the material passing through electrolyte ions (such as Li + , H + , Al 3+ etc.) intercalation / extraction of materials so that redox reactions change their color or optical properties. Using the reversible change characteristics of electrochromic color and transparency, electrochromic devices have begun to show important application prospects in the fields of electronic displays, anti-glare rearview mirrors, and energy-saving smart windows. [0004] In the prior art, electrochromism is usually based on Li + / H + Electrolyte is used as the main electrolyte, but the processing of lithium-based electrochromic devices requires very strict environmental conditions, these substances are usually toxic, the preparati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1524
CPCG02F1/1524
Inventor 曹盛梁艺邹炳锁赵家龙
Owner GUANGXI UNIV
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