A method for testing and analyzing the cycle stability of electrochromic materials based on multi-cycle double-step timing analysis technology

A technology for electrochromic materials and cycle stability, which is used in the analysis of materials, electrochemical variables of materials, and material analysis by electromagnetic means.

Active Publication Date: 2018-12-25
BEIJING UNIV OF TECH
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Problems solved by technology

However, in the literature, the amount of charge obtained by CV is usually attributed to the amount of charge consumed by the discoloration process, which creates an error in the mechanism of the electrochromic reaction process, and the source of the error comes from the limitation of testing technology

Method used

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  • A method for testing and analyzing the cycle stability of electrochromic materials based on multi-cycle double-step timing analysis technology
  • A method for testing and analyzing the cycle stability of electrochromic materials based on multi-cycle double-step timing analysis technology
  • A method for testing and analyzing the cycle stability of electrochromic materials based on multi-cycle double-step timing analysis technology

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Experimental program
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Embodiment 1

[0035] Application of multi-cycle double-saving technology in NiO electrochromic thin film

[0036] 1). Preparation NiO electrochromic film was prepared on ITO conductive glass substrate by sol-gel method, and then combined with KOH electrolyte, Ag / AgCl reference electrode, and platinum sheet electrode as counter electrode to form electrochromic electrochemical reaction system.

[0037] 2). Using an electrochemical workstation to perform multi-cycle measurements on the film by double-step chronocoulometry, such as figure 2 As shown, the Q-t data of the whole stage from the initial stage to the complete decay during the 1500 cycles of the NiO electrochromic film were recorded.

[0038] 3). Analyze the Q in the Q-t data b with Q c The value of the film cycle reversibility R value (R = Q ex / Q in )Such as image 3 shown. It can be found that the R value of the film decreases continuously with the cycle, indicating that the film has poor cycle performance.

[0039] 4). Se...

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Abstract

The invention relates to a cycle stability test and analysis method of an electrochromic material based on a multi-cycle double-step timing analysis technology, which belongs to the field of functional material test analysis technology. The electrochromic film is tested by the multi-cycle double-step technology. After analysis, the extracted charge Qex and the injected charge Qin are respectively obtained. The reversibility of the film cycle can be directly obtained by the ratio Qex / Qin of the two. R=Qex / The Qin value can meet the researchers' needs for evaluating the cycle performance of electrochromic materials. This technology can also divide the total response charge Q into three parts from a theoretical level, namely, the Radian charge Qf, the adsorption charge Qads, and the electric double layer charge Qdl. By comparing the changes of Qf and Qdl+nFAГ under multiple cycles, the transmission characteristics of ions and electrons in the reaction system and the factors affecting the cycle stability of the film are determined, which is convenient for the research and modification of the electrochromic performance and cycle life of the film.

Description

technical field [0001] The invention relates to a test method for testing and analyzing the discoloration mechanism of an electrochromic material by using a double-step timing analysis technique, and belongs to the field of functional material test and analysis techniques. Background technique [0002] With the rapid development of industry, energy shortage and environmental pollution have become key problems that human society urgently needs to solve. Developed countries use a large amount of energy to regulate the temperature of buildings, among which the energy consumption of air conditioning occupies the first place. Therefore, it has gradually become a consensus to take various measures to reduce energy consumption. For example, smart windows that adjust the solar spectrum to meet energy-saving and comfort requirements have broad application prospects in future buildings and have attracted widespread attention. When many substances are exposed to external effects such ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/416G02F1/15
CPCG01N27/4161G02F2203/69G01N27/42G02F1/15G02F1/1309
Inventor 严辉周开岭汪浩张永哲
Owner BEIJING UNIV OF TECH
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