三苯胺
电致变色
超级电容器
材料科学
电致变色装置
聚合物
假电容器
咔唑
光电子学
纳米技术
电容
光化学
化学
电极
物理化学
复合材料
作者
Mingfa Shao,Xiaojing Lv,Changjiang Zhou,Mi Ouyang,Xuchen Zhu,Haofei Xu,Zhenshuai Feng,Dominic S. Wright,Cheng Zhang
标识
DOI:10.1016/j.solmat.2022.112134
摘要
Electrochromic supercapacitors (ECSCs) that combine electrochromism and energy storage characters enable visual monitoring of the energy storage state of the device. In this work, two triphenylamine-based polymers pTPACB and pTTPACB were prepared by electrochemical polymerization. Both polymers exhibit multi-step redox behavior due to the presence of multiple triphenylamine and carbazole units. Correspondingly, pTPACB and pTTPACB can be switched from neutral colorless state to multicolored changes at different potentials. Compared with pTPACB, pTTPACB presents faster switching time and higher optical contrast. It is more intriguing that pTTPACB shows much more outstanding pseudocapacitive behavior with ultrahigh areal specific capacitance (6.64 mF‧cm-2) at a current density of 0.05 mA‧cm-2 due to the smaller nanoparticles size and loose aggregated structure. In addition, the asymmetric electrochromic supercapacitor devices based on pTTPACB can light a display panel or blue LED for 30 s accompanied with color changes from blue-green to colorless in the process of power supply. Hence, this work achieves a novel triphenylamine-based polymer for high-performance electrochromic supercapacitors, which shows great potential in electronic tags and display devices.
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