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 journalArticle

4 Citations (Scopus)

Abstract

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 ∼90% 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
JournalACS Nano
DOIs
Publication statusAccepted/In press - 2019 Jan 1

Fingerprint

Carbon Nanotubes
electrochemical capacitors
mixed oxides
Oxides
Electrolytes
Carbon nanotubes
Skin
carbon nanotubes
electrolytes
Electrodes
electrodes
air
Air
Stretching
molybdenum oxides
Molybdenum
Multiwalled carbon nanotubes (MWCN)
Manganese
manganese
Capacitance

Keywords

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

ASJC Scopus subject areas

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

Cite this

Skin-Like, Dynamically Stretchable, Planar Supercapacitors with Buckled Carbon Nanotube/Mn-Mo Mixed Oxide Electrodes and Air-Stable Organic Electrolyte. / Lee, Geumbee; Kim, Jung Wook; Park, Heun; Lee, Jae Yoon; Lee, Hanchan; Song, Changhoon; Jin, Sang Woo; Keum, Kayeon; Lee, Chul-Ho; Ha, Jeong Sook.

In: ACS Nano, 01.01.2019.

Research output: Contribution to journalArticle

Lee, Geumbee ; Kim, Jung Wook ; Park, Heun ; Lee, Jae Yoon ; Lee, Hanchan ; Song, Changhoon ; Jin, Sang Woo ; Keum, Kayeon ; Lee, Chul-Ho ; Ha, Jeong Sook. / Skin-Like, Dynamically Stretchable, Planar Supercapacitors with Buckled Carbon Nanotube/Mn-Mo Mixed Oxide Electrodes and Air-Stable Organic Electrolyte. In: ACS Nano. 2019.
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