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An Efficient Electrochromic Supercapacitor Based on Solution-Processable Nanoporous

Yaokang Lv1,2, Xing Yang1, Weishi Du1

  • 1International Sci. & Tech. Cooperation Base of Energy Materials and Application, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P.R. China.

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|May 16, 2020
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Summary

A new green synthesis of tris[4-(3,4-ethylenedioxythiophene)phenyl]amine (TEPA) monomer and its polymer (PTEPA) enables solution-processable nanoporous materials for energy storage and electrochromic devices.

Keywords:
dendrimerselectrochemistryenergy conversionpolymersstructure elucidation

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Chemistry

Background:

  • Developing novel materials for energy storage and smart devices is crucial.
  • Polymeric materials offer tunable properties for advanced applications.

Purpose of the Study:

  • To develop a green synthetic route for tris[4-(3,4-ethylenedioxythiophene)phenyl]amine (TEPA) monomer.
  • To synthesize and characterize solution-processable nanoporous poly{tris[4-(3,4-ethylenedioxythiophene)phenyl]amine} (PTEPA).
  • To evaluate PTEPA as a cathode material and in electrochromic supercapacitors.

Main Methods:

  • Single-crystal X-ray diffraction (XRD) for TEPA structure determination.
  • Chemical oxidative polymerization in a microemulsion to synthesize PTEPA.
  • Electrochemical testing for discharge capacity and cycling performance.
  • Assembly of all-solid-state electrochromic supercapacitors (ECSC).

Main Results:

  • TEPA monomer synthesized via a green route; its structure determined by XRD.
  • Nanoporous PTEPA exhibits a distorted 3D conformation with hierarchical pore structure.
  • PTEPA shows a discharge capacity of 89.5 mAh g⁻¹ as a cathode material.
  • An efficient all-solid-state ECSC assembled using PTEPA and nanoporous graphene films achieved 13.3 mF cm⁻².

Conclusions:

  • The developed PTEPA is a promising material for energy storage and electrochromic applications.
  • The ECSC demonstrates color changes correlating with energy storage levels.
  • The fabricated ECSC holds potential for applications like self-powered electrochromic smart windows.