NDLI: High-performance electric double-layer capacitors using mass-produced multi-walled carbon nanotubes

Content Provider	Springer Nature Link
Author	Endo, M. Kim, Y.J. Chi, T. Shinya, O. Matsuzawa, Y. Suezaki, H. Tantrakarn, K. Dresselhaus, M.S.
Copyright Year	2005
Abstract	Mass-produced multi-walled carbon nanotubes (MWNTs, which have the trademark VGNF®) have been investigated for their potential for use in electric double-layer capacitors (EDLCs). The variation aspects of these MWNTs by KOH activation showed quite interesting features. The gravimetric capacitance enhancement and specific surface area on KOH activation increased linearly. However, the capacitance per unit surface area has a maximum at 200 wt. % of KOH addition. The VGNF-KOH 500 sample exhibits a capacitance enhancement as much as 13 times greater (28.3 F/g) than that of the as-grown materials (2.2 F/g), under the conditions of charging up to 3.5 V and discharging at a current density of 10 mA/cm2. Interestingly, for this MWNT (VGNF®), selective attack on its amorphous carbon impurity has also been observed, as demonstrated from both scanning electron microscopy observations and Raman spectra. Consequently, the results of this study will provide insight into the potentiality of using MWNTs for EDLC electrodes, which would enable the cheapest production cost among the various types of carbon nanotubes.
Starting Page	559
Ending Page	565
Page Count	7
File Format	PDF
ISSN	09478396
Journal	Applied Physics A
Volume Number	82
Issue Number	4
e-ISSN	14320630
Language	English
Publisher	Springer-Verlag
Publisher Date	2005-11-18
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Operating Procedures, Materials Treatment Surfaces and Interfaces, Thin Films Characterization and Evaluation of Materials Nanotechnology Optical and Electronic Materials Condensed Matter
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Science

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