Electrochemical properties of high-power supercapacitors using single-walled carbon nanotube electrodes

Citation
Kh. An et al., Electrochemical properties of high-power supercapacitors using single-walled carbon nanotube electrodes, ADV FUNCT M, 11(5), 2001, pp. 387-392
Citations number
21
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
ADVANCED FUNCTIONAL MATERIALS
ISSN journal
1616-301X → ACNP
Volume
11
Issue
5
Year of publication
2001
Pages
387 - 392
Database
ISI
SICI code
1616-301X(200110)11:5<387:EPOHSU>2.0.ZU;2-L
Abstract
We have investigated the key factors determining the performance of superca pacitors constructed using single walled carbon nanotube (SWNT) electrodes. Several parameters, such as composition of the binder, annealing temperatu re, type of current collector, charging time, and discharging current densi ty have been optimized for the best performance of the supercapacitor with respect to energy density and power density. We find a maximum specific cap acitance of 180 F/g and a measured power density of 20 kW/kg at energy dens ities in the range from 7 to 6.5 Wh/kg at 0.9 V in a solution of 7.5 N KOH (the currently available supercapacitors have energy densities in the range 6-7 Wh/kg and power density in the range 0.2-5 kW/kg at 2.3 V in non-aqueo us solvents).