Method for preparing WO3 electrochromic film by potentiodynamic electrochemical deposition

An electrochromic and electrochemical technology, applied in coatings and other directions, can solve the problems of complex hydrothermal process, inability to prepare large-area thin films, and expensive magnetron sputtering equipment, and achieve good electrochromic and optical properties. High performance, high repeatability, uniform film formation and high repeatability

Inactive Publication Date: 2017-11-03
BEIJING UNIV OF TECH
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Problems solved by technology

[0004] Traditionally prepared WO 3 The main methods of thin films are sol-gel method, magnetron sputtering method, hydrothermal method, etc., but in the above methods, such as sol-gel method cannot prepare large-area thin films, the equipment cost of magnetron sputtering method is expensive, and hydrothermal method Complex process, etc.

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  • Method for preparing WO3 electrochromic film by potentiodynamic electrochemical deposition
  • Method for preparing WO3 electrochromic film by potentiodynamic electrochemical deposition
  • Method for preparing WO3 electrochromic film by potentiodynamic electrochemical deposition

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Embodiment 1

[0021] In the following examples, the Princeton Versa STAT 4 electrochemical workstation was used to carry out potentiodynamic electrochemical deposition of thin films and test the electrochemical properties of the thin films; Hitachi S-4800 field emission electron microscope was used to measure the microscopic morphology of the prepared thin films; SHIMADZU UV-3600 was used The optical transmittance of the prepared films was measured by UV-vis spectrophotometer.

[0022] 1. Add 10g of tungsten powder into 40ml of hydrogen peroxide one by one until the tungsten powder is completely dissolved. This process is an exothermic reaction. Then add 60ml of ethanol and 20ml of acetic acid to dilute evenly. The function of ethanol is to dilute the solution, and the function of acetic acid is to adjust the solution. pH, after fully reacting, a milky white solution was obtained, and finally centrifuged with a high-speed centrifuge for 20min at a speed of 12000r / min to finally obtain a ligh...

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Abstract

The invention discloses a method for preparing WO3 electrochromic film by potentiodynamic electrochemical deposition, and belongs to the technical field of functional materials. The method comprises the following steps: adding an appropriate amount of tungsten powder into hydrogen peroxide for completely dissolving to prepare a peroxotungstic acid solution; adding an appropriate amount of ethanol and acetic acid to be stirred fully to obtain a stable mixed solution. The peroxotungstic acid solution prepared in the invention is relatively stable and can be placed for one month at normal temperature for continuous use; the method for preparing the WO3 film by potentiodynamic electrochemical deposition is low in cost, simple in process, free from annealing, uniform in film formation, and high in repeatability; the prepared film has excellent electrochromic and optical properties, thereby providing a new idea for development and industrialized production of an energy-conversing and efficient low-cost WO3 film technology.

Description

technical field [0001] The invention relates to a kind of potentiodynamic electrochemical deposition to prepare WO 3 The method for an electrochromic thin film belongs to the technical field of functional materials. Background technique [0002] In recent years, with the aggravation of environmental pollution and the danger of energy shortage, human beings are facing more and more challenges. Therefore, how to effectively use renewable energy such as wind energy and solar energy to save energy and ensure the sustainable development of the human environment is imminent. . According to statistics, the energy consumption of building glass in my country accounts for most of the total energy consumption of the society, and people spend a lot of energy on temperature regulation of buildings every year. Therefore, people make various smart energy-saving windows and other measures to reduce energy consumption. As the main body of smart windows, this electrochromic material will be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/25
CPCC03C17/25C03C2217/219C03C2218/115
Inventor 汪浩郎凤培刘晶冰周开岭严辉
Owner BEIJING UNIV OF TECH
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