聚苯胺电致变色薄膜在不同颜色区间的电化学循环稳定性研究

doi:10.13208/j.electrochem.180516

电化学（中英文） ›› 2019, Vol. 25 ›› Issue (6): 690-698. doi: 10.13208/j.electrochem.180516

聚苯胺电致变色薄膜在不同颜色区间的电化学循环稳定性研究

徐坤，周开岭，汪浩^*，刘晶冰，严辉

北京工业大学材料科学与工程学院，北京 100124

收稿日期:2018-05-17 修回日期:2018-06-26 出版日期:2019-12-28 发布日期:2019-12-28
通讯作者: 汪浩 E-mail:haowang@bjut.edu.cn
基金资助:
北京市自然科学基金项目（No. 2161001）资助

Electrochemical Cycling Stability of Polyaniline Films in Different Color Ranges

XU Kun, ZHOU Kai-ling, WANG Hao^*, LIU Jing-bing, YAN Hui

The College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124

Received:2018-05-17 Revised:2018-06-26 Published:2019-12-28 Online:2019-12-28
Contact: WANG Hao E-mail:haowang@bjut.edu.cn
Supported by:
Natural Science Foundation of Beijing (No. 2161001)

摘要/Abstract

摘要： 本文采用电位阶跃和循环伏安法结合紫外可见光光度法研究了聚苯胺薄膜的电致变色性质. 聚苯胺薄膜颜色多变，颜色在浅黄色到绿色再到蓝色之间变化，本文研究在不同的颜色变化区间内聚苯胺薄膜的电化学循环稳定性. 研究结果表明，薄膜在黄色到蓝色(0.4 V ~ 1.2 V)以及绿色到蓝色(0.8 V ~ 1.2 V)区间变化时，电致变色循环性能较差，而在黄色和绿色(0.4 V ~ 0.8 V)之间变化时循环稳定性能良好，着色时间为4.5 s，着色效率高达159.48 cm²·C^-1.

关键词: 聚苯胺, 电致变色, 光电性能, 循环性能

Abstract: The electrochromic behaviors of polyaniline films were investigated by potential step and cyclic voltammetry coupled with UV viscosity photometer. The polyaniline films show colorful changes from pale yellow to green and then to blue. Electrochromic stability, electrochemical behavior, coloring performance, optical properties and surface formations of the produced films were studied in detail. The working electrode was the flexible PANI electrode, and the counter electrode and the reference electrode were a platinum sheet and Ag/AgCl, respectively. The in situ optical transmittance of the PANI film at 650 nm was measured using an ultraviolet-visible-near-infrared spectrophotometer (Shimadzu UV-3101PC) combining with a square quartz tank during all electrochemical cycling. The electrochemical tests were performed on a Princeton Versa STAT 4 electrochemical workstation. The electrochromic performance of polyaniline films has been studied using cyclic voltammetry and chronoamperometry over the potential window of -0.2 to 1.2 V in 1 mol·L^-1 LiClO₄⁺ propylene carbonate. The polyaniline films exhibited electrochromism with color that changed from pale yellow (Leucoemeraldine base at 0.4 V) to dark green (Emeraldine salt at 0.8 V) to dark blue (Emeraldine base at 1.2 V) in their oxidized states. This work reports the electrochemical cycling stability of polyaniline films in different color change intervals. It was found that the chronoamperometric current did not change significantly in the interval from yellow to green. In addition, the charge amount changed steadily and the electrochromic performance of the film was good. The electrochromic cycle performance was poor when the film changed from yellow to blue as well as green to blue. While in the interval from yellow to green on switching between 0.4 and 0.8 V, the electrochemical cycling stability was good; the response time of the film for the coloring was found to be 4.5 s and the coloring efficiency of the polyaniline film was observed to be 159.48 cm²·C^-1.

Key words: polyaniline, electrochromism, optoelectronic performance, cyclic performance

中图分类号:

O646
TQ174

徐坤, 周开岭, 汪浩, 刘晶冰, 严辉. 聚苯胺电致变色薄膜在不同颜色区间的电化学循环稳定性研究[J]. 电化学（中英文）, 2019, 25(6): 690-698.

XU Kun, ZHOU Kai-ling, WANG Hao, LIU Jing-bing, YAN Hui. Electrochemical Cycling Stability of Polyaniline Films in Different Color Ranges[J]. Journal of Electrochemistry, 2019, 25(6): 690-698.

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链接本文: https://electrochem.xmu.edu.cn/CN/10.13208/j.electrochem.180516

https://electrochem.xmu.edu.cn/CN/Y2019/V25/I6/690

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聚苯胺电致变色薄膜在不同颜色区间的电化学循环稳定性研究

Electrochemical Cycling Stability of Polyaniline Films in Different Color Ranges

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