Stretchable all-solid-state supercapacitor with wavy shaped polyaniline/graphene electrode

Yizhu Xie, Yan Liu, Yuda Zhao, Yuen Hong Tsang, Shu Ping Lau, Haitao Huang, Yang Chai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

237 Citations (Scopus)

Abstract

A stretchable electronic device can retain its functionalities during high-level mechanical deformation, and stimulates the applications in the field of wearable and bio-implantable electronics. Efficient energy storage devices are an indispensable component in stretchable electronic systems. To integrate power supplies together with electronic devices that are mechanically flexible and stretchable, we demonstrate a new kind of stretchable all-solid-state supercapacitor, which consists of two slightly separated polyaniline/graphene electrodes in a wavy shape, with a phosphoric acid/polyvinyl alcohol gel as the solid-state electrolyte and separator. The as-fabricated wavy shaped supercapacitor was encapsulated in an elastomeric substrate which can be stretched to a large extent without mechanical degradation. The supercapacitor exhibited a maximum specific capacitance of 261 F g-1. Electrochemical cycling testing with the supercapacitor showed 89% capacitance retention over 1000 charge-discharge cycles at a current density of 1 mA cm-2. The bending and stretching tests showed that the supercapacitor maintained high mechanical strength and high capacitance simultaneously, even under a strain of 30%. This stretchable all-solid-state supercapacitor shows great potential as an energy storage device for stretchable electronic systems.
Original languageEnglish
Pages (from-to)9142-9149
Number of pages8
JournalJournal of Materials Chemistry A
Volume2
Issue number24
DOIs
Publication statusPublished - 28 Jun 2014

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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