Yaokang Lv, Xing Yang, Weishi Du
May 15, 2020
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0
Influential Citations
8
Citations
Journal
ChemSusChem
Abstract
A new green-synthetic route to the tris[4-(3,4-ethylenedioxythiophene)phenyl]amine (TEPA) monomer has been developed and the molecular structure of TEPA determined by a single-crystal X-ray study for the first time. Solution-processable nanoporous poly(tris[4-(3,4-ethylenedioxythiophene)phenyl]amine) (PTEPA) was prepared via chemical-oxidative polymerization in a microemulsion. Based on the distorted structure of TEPA found in the solid-state, we speculate that dendritic PTEPA has a distorted three-dimensional conformation with multiple twisted channels and pores which are narrowed and blocked by the bifurcation and distortion of PTEPA, which is consistent with the observed hierarchical pore structure . As a cathode material, PTEPA exhibits a discharge capacity of 89.5 mAh/g in the initial cycle with a very sloping two-stage discharge curve and relatively stable cycling performance. Beyond excellent energy storage properties, PTEPA also shows relatively good electrochromic performance. On this basis, an efficient all-solid-state electrochromic supercapacitor (ECSC) with good electrochromic performance and high energy storage capacity (13.3 mF cm -2 ) was assembled based on PTEPA and nanoporous graphene films. During the charging and discharging processes, the color of the ECSC changes between yellow-green and steel-blue. Thus, the energy storage level of the ECSC can be monitored by the corresponding color changes. The fabricated ECSC may have practical applications, for example, in self-powered electrochromic smart windows.