电致变色
三苯胺
材料科学
超级电容器
电容
假电容器
电容感应
电化学
聚合物
普鲁士蓝
共轭体系
电极
纳米技术
光电子学
化学
电气工程
复合材料
物理化学
工程类
作者
Yunfei Xie,Yingchao Zhang,Meihua Zhu,Ruonan Huang,Danming Chao
标识
DOI:10.1016/j.dyepig.2022.110889
摘要
Despite the rapid advancement of electrochromic capacitive energy storage, there are still challenges in simultaneously improving electrochemical kinetics and cycling stability. Here we synthesize a new conjugated polymer bearing twisted EDOT-triphenylamine (TPA) dual-redox centers through facile electropolymerization. Benefiting from the multiple electroactive segments, the resultant polymer electrode reveals remarkable multicolor electrochromism (from yellow to green and blue) and concurrently good capacitive energy storage (high capacitance of 39 mF cm−2). The twisted alignment of the TPA structure facilitates ions diffusion and electrochemical reaction kinetics. Coupled with vanadium pentoxide ion-storage material, an assembled asymmetric electrochromic supercapacitor device (AESD) displays a high optical contrast of 71.37%, a wide voltage window of 2 V, the desirable energy density of 20.2 μWh cm−2, and outstanding cycling durability (87% capacitance after 6000 cycles at 0.2 mA cm−2). This method and knowledge offered by density functional theory (DFT) provide another path toward improving electrochromic and capacitive performance in a synergetic manner.
科研通智能强力驱动
Strongly Powered by AbleSci AI