All-solid-state flexible supercapacitors fabricated with bacterial nanocellulose papers, carbon nanotubes, and triblock-copolymer ion gels

Yu Jin Kang, Sang Jin Chun, Sung Suk Lee, Bo Yeong Kim, Jung Hyeun Kim, Haegeun Chung, Sun Young Lee, Woong Kim

Research output: Contribution to journalArticle

321 Citations (Scopus)

Abstract

We demonstrate all-solid-state flexible supercapacitors with high physical flexibility, desirable electrochemical properties, and excellent mechanical integrity, which were realized by rationally exploiting unique properties of bacterial nanocellulose, carbon nanotubes, and ionic liquid based polymer gel electrolytes. This deliberate choice and design of main components led to excellent supercapacitor performance such as high tolerance against bending cycles and high capacitance retention over charge/discharge cycles. More specifically, the performance of our supercapacitors was highly retained through 200 bending cycles to a radius of 3 mm. In addition, the supercapacitors showed excellent cyclability with C sp (∼20 mF/cm 2) reduction of only <0.5% over 5000 charge/discharge cycles at the current density of 10 A/g. Our demonstration could be an important basis for material design and development of flexible supercapacitors.

Original languageEnglish
Pages (from-to)6400-6406
Number of pages7
JournalACS Nano
Volume6
Issue number7
DOIs
Publication statusPublished - 2012 Jul 24

Keywords

  • bacterial nanocellulose
  • carbon nanotube
  • ion gel
  • supercapacitor
  • triblock copolymer

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)
  • Physics and Astronomy(all)

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