Method for preparing nickel oxide electrochromic film by hydrothermal method

An electrochromic and nickel oxide technology, which is applied in the direction of nickel oxide/nickel hydroxide, etc., can solve the problems of difficulty in preparing a large-area uniform NiO film, difficulty in meeting practical application requirements, and weak adhesion between the film and the substrate. Excellent cycle stability, beneficial to electron conduction, and the effect of improving electrochemical stability

Active Publication Date: 2013-06-26
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above methods rely on complex equipment and process technology, making it difficult to produce large-area uniform NiO films; or the prepared films have weak adhesion to the substrate and poor cycle stability, making it difficult to meet the needs of practical applications.

Method used

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  • Method for preparing nickel oxide electrochromic film by hydrothermal method
  • Method for preparing nickel oxide electrochromic film by hydrothermal method
  • Method for preparing nickel oxide electrochromic film by hydrothermal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The FTO conductive glass was sequentially immersed in deionized water, acetone and ethanol, respectively, ultrasonically washed and dried for later use. Weigh 0.45g of nickel acetate tetrahydrate and dissolve it in a mixed solution of 6mL of ethanol and 3mL of n-butanol. After the nickel acetate tetrahydrate is completely dissolved, add 0.12mL of concentrated ammonia water dropwise to obtain a transparent sol; then spin-coat the transparent sol on an ultrasonically cleaned The FTO conductive glass surface was vacuum-dried at 40° C. for 12 hours to obtain a nickel hydroxide seed layer. Prepare a reaction solution containing 0.6g of nickel acetate tetrahydrate, 0.6g of urea, and 56mL of water, then intrude the above-obtained FTO conductive glass with a seed layer into a hydrothermal kettle containing the reaction solution, and keep it warm at 180°C for 6 hours , and finally cooled naturally to room temperature, took out the FTO conductive glass, washed with water and etha...

Embodiment 2

[0034] The FTO conductive glass was sequentially immersed in deionized water, acetone and ethanol, respectively, ultrasonically washed and dried for later use. Weigh 0.9g of nickel acetate tetrahydrate and dissolve it in a mixed solution of 7.5mL of ethanol and 2.5mL of n-butanol. After nickel acetate tetrahydrate is completely dissolved, add 0.24mL of concentrated ammonia water dropwise to obtain a transparent sol; then spin coat the transparent sol on an ultrasonic The cleaned FTO conductive glass surface was vacuum-dried at 60° C. for 6 hours to obtain a nickel hydroxide seed layer. Prepare a reaction solution containing 0.6g of nickel acetate tetrahydrate, 0.3g of urea, and 56mL of water, then intrude the above-obtained FTO conductive glass with a seed layer into a hydrothermal kettle containing the reaction solution, and keep it warm at 160°C for 12 hours , and finally cooled naturally to room temperature, took out the FTO conductive glass, washed with water and ethanol i...

Embodiment 3

[0037] The FTO conductive glass was sequentially immersed in deionized water, acetone and ethanol, respectively, ultrasonically washed and dried for later use. Weigh 0.6g of nickel acetate tetrahydrate and dissolve it in a mixed solution of 7mL of ethanol and 2mL of n-butanol. After the nickel acetate tetrahydrate is completely dissolved, add 0.16mL of concentrated ammonia water dropwise to obtain a transparent sol; then spin-coat the transparent sol on an ultrasonically cleaned The FTO conductive glass surface was vacuum-dried at 50° C. for 8 hours to obtain a nickel hydroxide seed layer. Prepare a reaction solution containing 0.3g of nickel acetate tetrahydrate, 0.3g of urea, and 56mL of ethanol, then intrude the above-obtained FTO conductive glass with a seed layer into a hydrothermal kettle containing the reaction solution, and keep it warm at 170°C for 8 hours , and finally cooled naturally to room temperature, took out the FTO conductive glass, washed with water and etha...

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Abstract

The invention relates to a method for preparing a nickel oxide electrochromic film by a hydrothermal method. The method comprises the following steps of: dissolving nickel acetate tetrahydrate in a mixed solution of alcohol and n-butyl alcohol, dropwise adding ammonia water to the mixed solution after the nickel acetate tetrahydrate is dissolved to obtain sol; coating the sol to the surface of FTO (Fluorine-doped Tin Oxide) conductive glass in a rotary manner, drying the sol to obtain the FTO conductive glass with a crystal seed layer; mixing the nickel acetate tetrahydrate, urea and a solvent to obtain a reaction solution; immersing the FTO conductive glass with the crystal seed layer to the reaction solution for carrying out hydrothermal reaction; keeping the reaction solution for 6 hours to 12 hours under the condition of 160 DEG C to 180 DEG C, cooling the reaction solution to the room temperature, cleaning, drying and roasting to obtain the nickel oxide electrochromic film. The preparation method disclosed by the invention is simple, low in cost and likely applied to the glass surface film-making industry. The nanometer structure nickel oxide film directly grows on the surface of the FTO conductive glass by a hydrothermal method, so that the nickel oxide and the substrate have better binding force for being beneficial to electron conduction. Meanwhile, the electrochemical stability of the film is also improved.

Description

technical field [0001] The invention belongs to the field of preparation of electrochromic thin films, in particular to a method for preparing nickel oxide electrochromic thin films by a hydrothermal method. Background technique [0002] Electrochromism refers to the phenomenon that materials produce stable and reversible changes under the action of electric field. When the material is electrochemically injected and extracted with electrons and ions, its valence state and chemical composition change, so that the reflection and transmission properties of the material are changed, and the selective transmission or transmission of external thermal radiation and visible light is realized. Reflection can also prevent the diffusion of internal energy (such as heat), thereby keeping buildings, vehicles and other facilities cool in summer and warm in winter, reducing a large amount of energy consumption. Therefore, the electrochromic glass or device can be widely used in various as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/25C01G53/04
Inventor 王宏志马董云李耀刚张青红
Owner DONGHUA UNIV
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