Extremely Stable Polypyrrole Achieved via Molecular Ordering for Highly Flexible Supercapacitors

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Yan Huang
  • Yang Huang
  • Huiyuan Geng

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)2435-2440
Journal / PublicationACS Applied Materials and Interfaces
Volume8
Issue number3
Publication statusPublished - 27 Jan 2016

Abstract

The cycling stability of flexible supercapacitors with conducting polymers as electrodes is limited by the structural breakdown arising from repetitive counterion flow during charging/discharging. Supercapacitors made of facilely electropolymerized polypyrrole (e-PPy) have ultrahigh capacitance retentions of more than 97, 91, and 86% after 15000, 50000, and 100000 charging/discharging cycles, respectively, and can sustain more than 230000 charging/discharging cycles with still approximately half of the initial capacitance retained. To the best of our knowledge, such excellent long-term cycling stability was never reported. The fully controllable electropolymerization shows superiority in molecular ordering, favoring uniform stress distribution and charge transfer. Being left at ambient conditions for even 8 months, e-PPy supercapacitors completely retain the good electrochemical performance. The extremely stable supercapacitors with excellent flexibility and scalability hold considerable promise for the commerical application of flexible and wearable electronics.

Research Area(s)

  • cycling stability, electropolymerization, flexible supercapacitors, molecular ordering, polypyrrole

Citation Format(s)