Abstract
Abstract In this study, highly dispersible unzipped multi-walled carbon nanotubes were successfully synthesized by chemical etching, and these nanotubes were used in the fabrication of binder-free electrodes by electrostatic spray deposition for supercapacitor applications. The chemical etching introduces oxygen-containing functional groups and the unzipping or exfoliation process of the multi-walled carbon nanotube sidewalls produces a form of graphene sheets, making them highly dispersible in a polar solvent and providing rich electrochemically active sites accessible to electrolyte ions under electrode state. The binder-free unzipped multi-walled carbon nanotube electrode delivered a specific capacitance as high as 133 F/g at a scan rate of 10 mV/s in a 1 M H2SO4 aqueous electrolyte. When the scan rate was increased to 500 mV/s, the specific capacitance of this binder-free electrode decreased slightly to 103 F/g, which is a 77% retention of the initial value at 10 mV/s. This highlights the competitive rate capability of this carbon-based electrode.
| Original language | English |
|---|---|
| Article number | 3873 |
| Pages (from-to) | S21-S26 |
| Journal | Current Applied Physics |
| Volume | 15 |
| Issue number | S1 |
| DOIs | |
| Publication status | Published - 2015 Aug 3 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Physics and Astronomy(all)
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Highly dispersible surface-unzipped multi-walled carbon nanotubes as binder-free electrodes for supercapacitor applications. / Youn, Hee Chang; Park, Sang Hoon; Roh, Kwang Chul; Kim, Kwang Bum.
In: Current Applied Physics, Vol. 15, No. S1, 3873, 03.08.2015, p. S21-S26.Research output: Contribution to journal › Article
TY - JOUR
T1 - Highly dispersible surface-unzipped multi-walled carbon nanotubes as binder-free electrodes for supercapacitor applications
AU - Youn, Hee Chang
AU - Park, Sang Hoon
AU - Roh, Kwang Chul
AU - Kim, Kwang Bum
PY - 2015/8/3
Y1 - 2015/8/3
N2 - Abstract In this study, highly dispersible unzipped multi-walled carbon nanotubes were successfully synthesized by chemical etching, and these nanotubes were used in the fabrication of binder-free electrodes by electrostatic spray deposition for supercapacitor applications. The chemical etching introduces oxygen-containing functional groups and the unzipping or exfoliation process of the multi-walled carbon nanotube sidewalls produces a form of graphene sheets, making them highly dispersible in a polar solvent and providing rich electrochemically active sites accessible to electrolyte ions under electrode state. The binder-free unzipped multi-walled carbon nanotube electrode delivered a specific capacitance as high as 133 F/g at a scan rate of 10 mV/s in a 1 M H2SO4 aqueous electrolyte. When the scan rate was increased to 500 mV/s, the specific capacitance of this binder-free electrode decreased slightly to 103 F/g, which is a 77% retention of the initial value at 10 mV/s. This highlights the competitive rate capability of this carbon-based electrode.
AB - Abstract In this study, highly dispersible unzipped multi-walled carbon nanotubes were successfully synthesized by chemical etching, and these nanotubes were used in the fabrication of binder-free electrodes by electrostatic spray deposition for supercapacitor applications. The chemical etching introduces oxygen-containing functional groups and the unzipping or exfoliation process of the multi-walled carbon nanotube sidewalls produces a form of graphene sheets, making them highly dispersible in a polar solvent and providing rich electrochemically active sites accessible to electrolyte ions under electrode state. The binder-free unzipped multi-walled carbon nanotube electrode delivered a specific capacitance as high as 133 F/g at a scan rate of 10 mV/s in a 1 M H2SO4 aqueous electrolyte. When the scan rate was increased to 500 mV/s, the specific capacitance of this binder-free electrode decreased slightly to 103 F/g, which is a 77% retention of the initial value at 10 mV/s. This highlights the competitive rate capability of this carbon-based electrode.
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U2 - 10.1016/j.cap.2015.01.031
DO - 10.1016/j.cap.2015.01.031
M3 - Article
AN - SCOPUS:84938290833
VL - 15
SP - S21-S26
JO - Current Applied Physics
JF - Current Applied Physics
SN - 1567-1739
IS - S1
M1 - 3873
ER -