Significant Capacitance Performance of Vertically Aligned Single-Walled Carbon Nanotube Supercapacitor by Varying Potassium Hydroxide Concentration

Mohd Abid, Mohd Asyadi Azam (2013) Significant Capacitance Performance of Vertically Aligned Single-Walled Carbon Nanotube Supercapacitor by Varying Potassium Hydroxide Concentration. International Journal of Electrochemical Science (IJES), 8 (3). pp. 3902-3911. ISSN 1452-3981

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Abstract

In this manuscript, the effect of potassium hydroxide (KOH) electrolyte concentrations (0.1 M, 1.0 M, and 6.0 M) to the specific gravimetric capacitance of vertically aligned single-walled carbon nanotube (VA-SWCNT) based supercapacitor will be reported. VA-SWCNT electrode was prepared using direct growth technique of alcohol catalytic chemical vapor deposition. It was found that specific gravimetric capacitance of the VA-SWCNT supercapacitors increased with increasing KOH electrolyte concentration. Besides, lower concentration (or viscosity) of the KOH electrolyte may give better stability in charge storage performance; suggesting difference of ion movement inside the VA-SWCNT double-layer system. The capacitance slope (as a function of cyclic voltammetry scan rate) can be improved by lower concentration of the electrolyte.

Item Type: Article
Subjects: T Technology > T Technology (General)
Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Faculty of Manufacturing Engineering > Department of Engineering Materials
Depositing User: Dr Mohd Asyadi 'Azam Bin Mohd Abid
Date Deposited: 05 Mar 2013 06:54
Last Modified: 28 May 2015 03:46
URI: http://eprints.utem.edu.my/id/eprint/6945
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