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Electrochromic material and preparation method thereof

An electrochromic material and nickel oxide technology, applied in the field of electrochromic materials and their preparation, can solve the problems of single color change, slow electrochromic speed, etc., and achieve a large dimming range, increase contact area, and large activity The effect of reaction area

Inactive Publication Date: 2009-04-29
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are problems such as slow electrochromic speed and single color change in electrochromic materials.

Method used

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  • Electrochromic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh 6g of nickel sulfate and 2g of potassium persulfate into a beaker, then add 100mL of deionized water and stir until completely dissolved. Then put the clean ITO glass vertically on the wall of the beaker, its conductive surface faces the solution, and the non-conductive surface is sealed with insulating glue. Then add 6 g of ammonia water with a mass concentration of 20%, stir and react at 35° C. for 10 minutes, take out the sample, dry it naturally, and calcinate it under argon at 350° C. for 1 hour to prepare a porous nickel oxide film.

[0017] Weigh 1.6g of lithium perchlorate and dissolve it in 80g of acetonitrile solution, stir until completely dissolved. Then add 0.16 g of 3,4-ethylenedioxythiophene, stir and dissolve, and pass argon gas through the whole electrolyte for 30 minutes to remove oxygen. Then the electrolyte solution was transferred to an electrochemical three-electrode system, in which the porous nickel oxide film was used as the working elect...

Embodiment 2

[0019] Weigh 24g of nickel sulfate and 4g of potassium persulfate into a beaker, then add 250mL of deionized water and stir until completely dissolved. Put the clean ITO glass vertically on the wall of the beaker, with the conductive surface facing the solution, and the non-conductive surface sealed with insulating glue. Then add 36 g of ammonia water with a mass concentration of 20%, take out the sample after stirring and reacting at 35° C. for 20 minutes, dry it naturally, and calcinate it under argon at 350° C. for 1.5 hours to prepare a porous nickel oxide film.

[0020] Weigh 1.6g of lithium perchlorate and dissolve it in 80g of acetonitrile solution, stir until completely dissolved. Then add 0.16 g of 3,4-ethylenedioxythiophene, stir and dissolve, and pass argon gas through the whole electrolyte for 30 minutes to remove oxygen. Then the electrolyte solution was transferred to an electrochemical three-electrode system, in which the porous nickel oxide film was used as th...

Embodiment 3

[0022] Weigh 64g of nickel sulfate and 8g of potassium persulfate into a beaker, then add 400mL of deionized water and stir until completely dissolved. Put the clean ITO glass vertically on the wall of the beaker, with the conductive surface facing the solution, and the non-conductive surface sealed with insulating glue. Then add 192g of ammonia water with a mass concentration of 20%, take out the sample after stirring and reacting at 35°C for 30 minutes, dry it naturally, and calcinate it under argon at 300°C for 2 hours to prepare a porous nickel oxide film.

[0023] Weigh 3.2g of lithium perchlorate and dissolve in 160g of acetonitrile solution, stir until completely dissolved. Then add 0.32 g of 3,4-ethylenedioxythiophene, stir and dissolve, and pass argon gas through the whole electrolytic solution for 30 minutes to remove oxygen. Then the electrolyte solution was transferred to an electrochemical three-electrode system, in which the porous nickel oxide film was used as ...

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Abstract

The invention discloses an electrochromic material which is a porous film compounded through nickel oxide and 3, 4-ethylene dioxygen thiofuran, wherein the composite film has a random porous structure; the range of aperture is between 10 and 250 nm; and the thickness of the film is between 200 and 500 nm. The preparation method comprises the following steps: 3, 4- ethylene dioxygen thiofuran is used as a monomer; the porous nickel oxide is used as a conductive template; lithium perchlorate is added into an acetonitrile solution and is used as a supporting electrolyte to prepare the nickel oxide / poly3, 4-ethylene dioxygen thiofuran composite porous electrochromic film through an electrochemical cyclic voltammetry sedimentation method. The prepared electrochromic material has good mechanical performance and electrochromic performance, shows multiple electrochromism and rapid discoloring effect, can be assembled to a transmission-type or reflection-type full solid electrochromic device, and has wide application prospect in information storage recording, architectural glass smart window, large screen display, infrared stealth and other fields.

Description

technical field [0001] The invention relates to an electrochromic material and a preparation method thereof, in particular to a composite electrochromic thin film of an organic conductive polymer and a transition metal compound and a preparation method thereof. Background technique [0002] As a new type of functional material, electrochromic materials can reversibly and efficiently adjust the light and heat flux of the environment under the action of external voltage or current. and other fields have broad application prospects. However, there are problems such as slow electrochromic speed and single color change in electrochromic materials. The electrochromic process is essentially an electrochemical reaction process involving double injection / extraction of electrons and ions. The problem of slow electrochromic speed is mainly caused by the low diffusion rate of ions in the electrochemical reaction process. An effective way to increase the diffusion rate of ions is to pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K9/00C08L65/00C08K3/22C08G61/12
Inventor 涂江平夏新辉张俊相佳媛王秀丽
Owner ZHEJIANG UNIV
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