TY - JOUR
T1 - Highly Stretchable Supercapacitors Enabled by Interwoven CNTs Partially Embedded in PDMS
AU - Zhang, Runzhi
AU - Ding, Junjun
AU - Liu, Chao
AU - Yang, Eui Hyeok
N1 - Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/5/29
Y1 - 2018/5/29
N2 - 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/SiO2 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/cm2 in 30% KOH solution and is 0.3 mF/cm2 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.
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/SiO2 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/cm2 in 30% KOH solution and is 0.3 mF/cm2 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.
KW - electronics
KW - flexible
KW - stretchable
KW - supercapacitors
KW - vertically aligned carbon nanotubes
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U2 - 10.1021/acsaem.8b00156
DO - 10.1021/acsaem.8b00156
M3 - Article
AN - SCOPUS:85052785288
VL - 1
SP - 2048
EP - 2055
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
IS - 5
ER -