A purely inorganic multicolor electrochromic film based on polyacids

An electrochromic and inorganic technology, applied in the field of pure inorganic multi-color electrochromic film, can solve the problems of long-term stability limited by the stability of organic components, single component, poor stability, etc., and achieve good multi-color discoloration performance, production Low cost and responsive effect

Active Publication Date: 2017-02-22
LIAONING UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of these two types of electrochromic materials is poor stability
At present, a class of electrochromic materials with better stability is inorganic electrochromic materials. Inorganic electrochromic materials have a single component and good color changing performance. The only disadvantage is that the color change is single.
In order to break the status quo of single discoloration, an effective method is to make a composite film of organic small molecules or high molecular polymers and inorganic oxides. Although the composite film has a multi-color display, its long-term stability is still limited. Stability of organic components
Therefore, it is a challenge to develop purely inorganic multi-color electrochromic materials.

Method used

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  • A purely inorganic multicolor electrochromic film based on polyacids
  • A purely inorganic multicolor electrochromic film based on polyacids
  • A purely inorganic multicolor electrochromic film based on polyacids

Examples

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Embodiment 1

[0030] Example 1 Preparation of a pure inorganic multi-color electrochromic film based on polyacid

[0031] The specific steps are:

[0032] 1) Dissolve potassium trivanadium pentatungstate in water to prepare 0.015mol / L aqueous solution A, and adjust the pH of the solution to 2 with hydrochloric acid.

[0033] 2) Commercial P25 powder TiO2 was formulated into paste B which can be used for screen printing.

[0034] 3) Conductive glass FTO is screen-printed with paste B, so that a 5 micron thick TiO2 thin layer is printed on its surface.

[0035] 4) Place the conductive glass FTO printed with a TiO2 thin layer in aqueous solution A for electrodeposition, use the conductive glass FTO printed with a TiO2 thin layer as a working electrode, a saturated calomel electrode as a reference electrode, and a Pt sheet as a counter electrode, Electrodeposition was performed by cyclic voltammetry, the voltage range was set at 0.5V-1.0V, the scan rate was 75mV / s, and the number of cycles wa...

Embodiment 2

[0042] Example 2 Preparation of a pure inorganic multi-color electrochromic film based on polyacid

[0043]The preparation method is the same as that in Example 1, except that the number of cycles is changed 20 times to obtain a pure inorganic multi-color electrochromic film based on polyacid.

[0044] Such as figure 2 Shown, the SEM characterization figure of the pure inorganic multi-color electrochromic film based on polyacid prepared in embodiment 2, by figure 2 It can be seen that the particle size of TiO2 particles coated with polyacid in the film is about 20nm, and the coating of polyacid on TiO2 particles is uniform without aggregation. Such as Figure 4 Shown embodiment 2 prepares the AFM figure based on the pure inorganic multi-color electrochromic film of polyacid, by Figure 4 It can be seen that the surface of the film is smooth and the roughness is small, which is extremely beneficial to the permeability of the faded state.

[0045] The pure inorganic multi-...

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Abstract

The invention provides a polyacid-based pure inorganic multi-color electrochromic film. A preparing method of the electrochromic film includes the steps that (1) polyoxometallate is prepared into an aqueous solution A, the pH value of the solution is adjusted to be 2 through hydrochloric acid; (2) the commercial P25 powder TiO2 is prepared into sizing agents B capable of being used for silk-screen printing; (3) silk-screen printing is conducted on a conductive substrate through the sizing agents B so that a TiO2 thin layer can be printed on the surface of the conductive substrate; (4) the conductive substrate with the TiO2 thin layer is placed into the aqueous solution A, and electro-deposition is conducted; (5) the conductive substrate generated after the electro-deposition is conducted is taken out, cleaned through deionized water and ethyl alcohol, and dried through hot air. The hydrosolvent is adopted during the whole preparation process, and the method is environmentally friendly, free of harm to the environment and easy and convenient to operate. The prepared electrochromic film has good optical contrast and multi-color electrochromic performance, and a system for making an electrochromic display is provided.

Description

technical field [0001] The invention relates to an inorganic multi-color electrochromic film, in particular to a polyacid-based pure inorganic multi-color electrochromic film. Background technique [0002] Electrochromic devices can produce coloring and fading under a small applied voltage. Electrochromic devices are used in a wide range of applications, such as: anti-glare rearview mirrors, invisible helmets, and especially displays. Color display is an important prerequisite for electrochromic displays to be widely used. At present, there are certain reports on the production of multi-color electrochromic devices, and the methods can be divided into two categories: 1. Use small organic molecules as electrochromic materials; 2. Use high molecular polymers as electrochromic materials. However, the disadvantage of these two types of electrochromic materials is poor stability. At present, a class of electrochromic materials with better stability is inorganic electrochromic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/15G02F1/153C03C17/34
CPCC03C17/3411G02F1/1523G02F1/155
Inventor 王诗铭刘琳李超马春蕾卢俊
Owner LIAONING UNIVERSITY
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