Abstract

We have investigated the key factors determining the performance of supercapacitors constructed using single-walled carbon nanotube (SWNT) electrodes. Several parameters, such as composition of the binder, annealing temperature, type of current collector, charging time, and discharging current density have been optimized for the best performance of the supercapacitor with respect to energy density and power density. We find a maximum specific capacitance of 180 F/g and a measured power density of 20 kW/kg at energy densities 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-aqueous solvents).

Keywords

SupercapacitorMaterials sciencePower densityCarbon nanotubeCapacitanceCurrent densityElectrodeElectrochemistryAnnealing (glass)Energy densitySpecific energyNanotechnologyChemical engineeringPower (physics)Composite materialEngineering physicsThermodynamics

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Publication Info

Year
2001
Type
article
Volume
11
Issue
5
Pages
387-392
Citations
862
Access
Closed

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Kay-Hyeok An, W. S. Kim, Y. S. Park et al. (2001). Electrochemical Properties of High-Power Supercapacitors Using Single-Walled Carbon Nanotube Electrodes. Advanced Functional Materials , 11 (5) , 387-392. https://doi.org/10.1002/1616-3028(200110)11:5<387::aid-adfm387>3.0.co;2-g

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DOI
10.1002/1616-3028(200110)11:5<387::aid-adfm387>3.0.co;2-g