Abstract

Carbon nanotube sheet electrodes have been prepared from catalytically grown carbon nanotubes of high purity and narrow diameter distribution, centered around 80 Å. Our study shows that the electrodes are free-standing mats of entangled nanotubes with an open porous structure almost impossible to obtain with activated carbon or carbon fiber. These properties are highly desirable for high power and long cycle life electrochemical capacitors. Specific capacitances of 102 and 49 F/g were measured at 1 and 100 Hz, respectively, on a single cell device with 38 wt % H2SO4 as the electrolyte. The same cell had a power density of >8000 W/kg.

Keywords

Carbon nanotubeMaterials scienceElectrochemistryElectrodeCapacitorElectrolyteElectrolytic capacitorPower densityNanotechnologyCarbon fibersSupercapacitorChemical engineeringNanotubeComposite materialChemistryPower (physics)Electrical engineeringVoltage

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Publication Info

Year
1997
Type
article
Volume
70
Issue
11
Pages
1480-1482
Citations
1385
Access
Closed

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Cite This

Chunming Niu, E. K. Sichel, Robert Hoch et al. (1997). High power electrochemical capacitors based on carbon nanotube electrodes. Applied Physics Letters , 70 (11) , 1480-1482. https://doi.org/10.1063/1.118568

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DOI
10.1063/1.118568