A stretchable vertically stacked microsupercapacitor with kirigami-bridged island structure: MnO2/graphene/Poly(3,4-ethylenedioxythiophene) nanocomposite electrode through pen lithography

Hee Uk Lee, Chulhwan Park, Joon Hyung Jin, Seung Wook Kim

Research output: Contribution to journalArticle

Abstract

Although portable and wearable devices have recently attracted considerable attention due to the increasing demands for stretchable power sources, their high fabrication costs as well as lack of mechanical strength and integration capability limit the utilization of these devices. Herein we developed an array of 3 × 3 microsupercapacitors (MSCs) that is mechanically stretchable by attaching MnO2/graphene/poly (3,4-ethylenedioxythiophene)-based nanocomposite on a kirigami-bridged island substrate; the electrodes were simply drawn using pen lithography without following any conventional complicated processing. The structure can dissipate an external stress involved in the deformation of the electrode and delocalize any unwanted excessive strain over the entire interconnected MSCs. The results show that such a stretchable MSC array exhibits an areal specific capacitance of 23.04 mF cm−2 and can be stretched by up to 200% at 3.6 V without showing any degradation in electrochemical performance. In addition, 94% of the initial capacitance is maintained after 5600 times of continuously stretching and releasing these MSCs by the application of a tensile strain. The output voltage and capacitance can be adjusted by using parallel or series arrangements of individual MSCs. Furthermore, these MSCs can be directly applied on the human skin and can maintain their electrochemical performance with repeated body movements.

Original languageEnglish
Article number227898
JournalJournal of Power Sources
Volume453
DOIs
Publication statusPublished - 2020 Mar 31

Keywords

  • Gel electrolyte
  • Graphene flake
  • Kirigami-bridged island
  • Micro-supercapacitor
  • PEDOT
  • Pen lithography

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'A stretchable vertically stacked microsupercapacitor with kirigami-bridged island structure: MnO<sub>2</sub>/graphene/Poly(3,4-ethylenedioxythiophene) nanocomposite electrode through pen lithography'. Together they form a unique fingerprint.

  • Cite this