Skin-Like, Dynamically Stretchable, Planar Supercapacitors with Buckled Carbon Nanotube/Mn-Mo Mixed Oxide Electrodes and Air-Stable Organic Electrolyte

Geumbee Lee, Jung Wook Kim, Heun Park, Jae Yoon Lee, Hanchan Lee, Changhoon Song, Sang Woo Jin, Kayeon Keum, Chul Ho Lee, Jeong Sook Ha

Research output: Contribution to journalArticlepeer-review

83 Citations (Scopus)


For practical applications of high-performance supercapacitors as wearable energy storage devices attached to skin or clothes, the supercapacitors are recommended to have stable mechanical and electrochemical performances during dynamic deformations, including stretching, due to real-time movements of the human body. In this work, we demonstrate a skin-like, dynamically stretchable, planar supercapacitor (SPS). The SPS consists of buckled manganese/molybdenum (Mn/Mo) mixed oxide@multiwalled carbon nanotube (MWCNT) electrodes; organic gel polymer electrolyte of adiponitrile, succinonitrile, lithium bis(trifluoromethanesulfonyl)imide, and poly(methyl methacrylate); and a porous, elastomeric substrate. The addition of an Mn/Mo mixed oxide to the MWCNT film produces an 8-fold increase in the areal capacitance. The use of an organic solvent-based electrolyte enhances the operation cell voltage to 2 V and air stability to one month under ambient air conditions. The fabricated planar supercapacitors are biaxially stretchable up to 50% strain and maintain â90% of their initial capacitance after 1000 repetitive stretching/releasing cycles. Furthermore, the SPS exhibits stable electrochemical performance under dynamic stretching in real time regardless of the strain rate and performs reliably during repetitive bending/spreading motions of an index finger while attached to skin.

Original languageEnglish
Pages (from-to)855-866
Number of pages12
JournalACS nano
Issue number1
Publication statusPublished - 2019 Jan 22

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (Grant No. NRF-2016R1A2A1A05004935). The authors also thank the KU-KIST graduate school program of the Korea University.

Publisher Copyright:
© 2018 American Chemical Society.


  • organic electrolyte
  • planar supercapacitors
  • pseudocapacitors
  • skin-attachable electronics
  • stretchable supercapacitors

ASJC Scopus subject areas

  • General Materials Science
  • General Engineering
  • General Physics and Astronomy


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