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A kind of composite electrochromic thin film and preparation method thereof

An electrochromic and composite thin film technology, applied in the direction of coating, etc., can solve the problems of slow discoloration, poor conductivity, poor electrochemical reaction kinetics, etc., and achieve the effect of overcoming electrochemical reaction ability and good application prospects

Active Publication Date: 2020-09-08
NANJING NANYOU INST OF INFORMATION TECHNOVATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the traditional NiO electrochromic film has many problems such as slow discoloration speed, low discoloration efficiency, and short cycle life, which limit its application in the field of electrochromism.
On the one hand, the porous structure in the NiO film is not conducive to the back-and-forth migration and transport of ions between the electrodes, resulting in the contact between NiO and the electrolyte being limited to the outer surface, the reaction area is limited, and the electrochemical reaction kinetics is poor.
On the other hand, due to the poor conductivity of NiO material, it is not conducive to the transfer of charges.

Method used

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  • A kind of composite electrochromic thin film and preparation method thereof
  • A kind of composite electrochromic thin film and preparation method thereof
  • A kind of composite electrochromic thin film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] ITO conductive glass (3×2.2cm 2 ) into acetone, absolute ethanol, and deionized water for ultrasonication, each process lasts 10 minutes, and after cleaning, use a vacuum drying oven for later use.

[0027] Step 1, wrap the non-conductive surface of the ITO conductive glass with polyimide tape. After adding 20g of nickel sulfate hexahydrate and 4g of potassium peroxodisulfate into 200mL of deionized water, hang the ITO conductive glass vertically in the above mixed liquid, stir magnetically until the nickel sulfate hexahydrate and potassium peroxodisulfate are completely dissolved, add 20mL of concentrated Ammonia water (mass fraction: 25-28%) was reacted at 20°C for 30 minutes. Take out the ITO conductive glass, tear off the polyimide tape, rinse it with deionized water several times, and dry it. Calcined in a muffle furnace at 300°C for 2h, cooled naturally to room temperature, and obtained ITO conductive glass with a NiO thin film on the surface.

[0028] Step 2, ...

Embodiment 2

[0033]ITO conductive glass (3×2.2cm 2 ) into acetone, absolute ethanol, and deionized water in turn for ultrasonication, each process lasted 10 minutes, and after cleaning, use a vacuum oven for use.

[0034] Step 1, wrap the non-conductive surface of the ITO conductive glass with polyimide tape. After adding 15g of nickel sulfate hexahydrate and 4g of potassium peroxodisulfate into 200mL of deionized water, hang the ITO conductive glass vertically in the above mixed liquid, stir magnetically until the nickel sulfate hexahydrate and potassium peroxodisulfate are completely dissolved, add 16mL of concentrated Ammonia water (mass fraction: 25-28%) was reacted at 50°C for 20 minutes. Take out the ITO conductive glass, tear off the polyimide tape, rinse it with deionized water several times, and dry it. Calcined at 250°C for 2h in a muffle furnace, cooled naturally to room temperature, and obtained ITO conductive glass with a NiO thin film on the surface.

[0035] Step 2: Add 9...

Embodiment 3

[0040] FTO conductive glass (3×2.2cm 2 ) into acetone, absolute ethanol, and deionized water in turn for ultrasonication, each process lasted 10 minutes, and after cleaning, use a vacuum oven for use.

[0041] Step 1, wrap the non-conductive surface of the FTO conductive glass with polyimide tape. After adding 18g of nickel sulfate hexahydrate and 4g of potassium peroxodisulfate into 200mL of deionized water, hang the FTO conductive glass vertically in the above mixed liquid, stir magnetically until the nickel sulfate hexahydrate and potassium peroxodisulfate are completely dissolved, add 18mL of concentrated Ammonia water (mass fraction: 25-28%) was reacted at 30°C for 30 minutes. Take out the FTO conductive glass, tear off the polyimide tape, rinse it with deionized water several times, and dry it. Calcined in a muffle furnace at 350°C for 2h, and cooled naturally to room temperature to obtain FTO conductive glass with a NiO thin film on the surface.

[0042] Step 2, add ...

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Abstract

The invention discloses a composite electrochromic film and a preparation method thereof. The composite electrochromic film is characterized in that ITO conductive glass of FTO conductive glass is used as a substrate, wherein the glass surface is covered with a composite film which is a ternary composite material; the ternary composite material is loose and porous, and the diameter of the ternarycomposite material is at nanometer level; Co3O4 / rGO is uniformly modified on a hole channel of a NiO film; the Co3O4 particles are consistent in size, and the diameter is at the nanometer level. Thepreparation method comprises the following steps: preparing the NiO film on the substrate, preparing the Co3O4 / rGO suspension, and modifying the Co3O4 / rGO to the NiO film. According to the compositeelectrochromic film and the preparation method thereof, the specific surface area of the NiO film is improved, and a conducting agent is added to the NiO film, so that the electrochromic performancessuch as the color change rate, the coloring efficiency and the circulating stability of the NiO film can be effectively improved.

Description

technical field [0001] The invention belongs to the field of composite film materials, and in particular relates to a composite electrochromic film and a preparation method thereof. Background technique [0002] Electrochromism refers to the phenomenon that the optical properties of materials (absorption rate, transmittance or reflectance, etc.) undergo stable and reversible changes under the action of an external electric field, and the appearance shows reversible changes in color and transparency. Materials that can undergo electrochromic phenomena are called electrochromic materials. The term electrochromic was first proposed by Platt in 1961. Since then, researchers have successively discovered various electrochromic materials, such as nickel oxide (NiO), titanium dioxide (TiO 2 ), molybdenum trioxide (MoO 3 ) and other transition metal oxides and organic polymer materials such as polyaniline and polypyrrole. [0003] At present, the traditional NiO electrochromic fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/34
CPCC03C17/3411C03C2217/217C03C2217/231C03C2217/241C03C2217/29C03C2217/70C03C2218/111
Inventor 魏昂王荣位威
Owner NANJING NANYOU INST OF INFORMATION TECHNOVATION CO LTD