Highly Stretchable Supercapacitors Enabled by Interwoven CNTs Partially Embedded in PDMS

Runzhi Zhang, Junjun Ding, Chao Liu, Eui-Hyeok Yang

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We present flexible and stretchable supercapacitors composed of interwoven carbon nanotubes (CNTs) embedded in polydimethylsiloxane (PDMS) substrates. CNTs are grown using atmospheric-pressure chemical vapor deposition (APCVD) on a Si/SiO 2 substrate and then partially embedded into PDMS. This unique process permits a rapid and facile integration of the interwoven CNT-PDMS structure as a flexible and stretchable supercapacitor electrode with a high level of integrity under various strains. The electrochemical properties of the supercapacitors are measured in 30% KOH solution and with a poly(vinyl alcohol) (PVA)-KOH gel electrolyte (i.e., all-solid-state flexible supercapacitor). The measured capacitance of the supercapacitor is 0.6 mF/cm 2 in 30% KOH solution and is 0.3 mF/cm 2 with a PVA-KOH gel electrolyte at a scan rate of 100 mV/s, showing a consistent performance under stretching from 0% to 200% and bending/twisting angles from 0° to 180°. The stretching test is performed for 200 cycles from 0% to 100%, after which its capacitance is attenuated by 25%. The all-solid-state stretchable supercapacitors show a stable galvanostatic performance during and after 10 000 charge/discharge cycles with its capacitance maintained.

Original languageEnglish (US)
Pages (from-to)2048-2055
Number of pages8
JournalACS Applied Energy Materials
Volume1
Issue number5
DOIs
StatePublished - May 29 2018

Fingerprint

Carbon Nanotubes
Capacitance
Electrolytes
Stretching
Gels
Substrates
Electrochemical properties
Atmospheric pressure
Supercapacitor
baysilon
Chemical vapor deposition
Alcohols
Electrodes

All Science Journal Classification (ASJC) codes

  • Chemical Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Materials Chemistry
  • Electrical and Electronic Engineering
  • Electrochemistry

Cite this

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title = "Highly Stretchable Supercapacitors Enabled by Interwoven CNTs Partially Embedded in PDMS",
abstract = "We present flexible and stretchable supercapacitors composed of interwoven carbon nanotubes (CNTs) embedded in polydimethylsiloxane (PDMS) substrates. CNTs are grown using atmospheric-pressure chemical vapor deposition (APCVD) on a Si/SiO 2 substrate and then partially embedded into PDMS. This unique process permits a rapid and facile integration of the interwoven CNT-PDMS structure as a flexible and stretchable supercapacitor electrode with a high level of integrity under various strains. The electrochemical properties of the supercapacitors are measured in 30{\%} KOH solution and with a poly(vinyl alcohol) (PVA)-KOH gel electrolyte (i.e., all-solid-state flexible supercapacitor). The measured capacitance of the supercapacitor is 0.6 mF/cm 2 in 30{\%} KOH solution and is 0.3 mF/cm 2 with a PVA-KOH gel electrolyte at a scan rate of 100 mV/s, showing a consistent performance under stretching from 0{\%} to 200{\%} and bending/twisting angles from 0° to 180°. The stretching test is performed for 200 cycles from 0{\%} to 100{\%}, after which its capacitance is attenuated by 25{\%}. The all-solid-state stretchable supercapacitors show a stable galvanostatic performance during and after 10 000 charge/discharge cycles with its capacitance maintained.",
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Highly Stretchable Supercapacitors Enabled by Interwoven CNTs Partially Embedded in PDMS. / Zhang, Runzhi; Ding, Junjun; Liu, Chao; Yang, Eui-Hyeok.

In: ACS Applied Energy Materials, Vol. 1, No. 5, 29.05.2018, p. 2048-2055.

Research output: Contribution to journalArticle

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AB - We present flexible and stretchable supercapacitors composed of interwoven carbon nanotubes (CNTs) embedded in polydimethylsiloxane (PDMS) substrates. CNTs are grown using atmospheric-pressure chemical vapor deposition (APCVD) on a Si/SiO 2 substrate and then partially embedded into PDMS. This unique process permits a rapid and facile integration of the interwoven CNT-PDMS structure as a flexible and stretchable supercapacitor electrode with a high level of integrity under various strains. The electrochemical properties of the supercapacitors are measured in 30% KOH solution and with a poly(vinyl alcohol) (PVA)-KOH gel electrolyte (i.e., all-solid-state flexible supercapacitor). The measured capacitance of the supercapacitor is 0.6 mF/cm 2 in 30% KOH solution and is 0.3 mF/cm 2 with a PVA-KOH gel electrolyte at a scan rate of 100 mV/s, showing a consistent performance under stretching from 0% to 200% and bending/twisting angles from 0° to 180°. The stretching test is performed for 200 cycles from 0% to 100%, after which its capacitance is attenuated by 25%. The all-solid-state stretchable supercapacitors show a stable galvanostatic performance during and after 10 000 charge/discharge cycles with its capacitance maintained.

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