Vertically aligned double-walled carbon nanotube electrode prepared by transfer methodology for electric double layer capacitor

Honda, Yuichi; Takeshige, Masayuki; Shiozaki, Hideki; Kitamura, Takaharu; Yoshikawa, Kenji; Chakrabarti, Supriya; Suekane, Osamu; Pan, Lujun; Nakayama, Yoshikazu; Yamagata, Masaki; Ishikawa, Masashi

doi:10.1016/j.jpowsour.2008.09.020

Cited by 32 publications

(10 citation statements)

References 23 publications

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“…An effective improvement in capacitive performance by aligning was also reported on MWCNTs [113] and DWCNTs [114]: the CNTs were synthesized by catalytic CVD and then transferred to an aluminum current collector using a small amount of conductive cement to make them vertically aligned. The rate performance of DWCNTs and MWCNTs was quite excellent even at a high current density as 20 A g −1 , but the capacitance value of DWCNTs was larger than MWCNTs.…”

Section: Double-walled and Multi-walled Carbon Nanotubesmentioning

confidence: 90%

Carbon materials for electrochemical capacitors

Inagaki

Konno

Tanaike

2010

Journal of Power Sources

1,322

651

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Section: Double-walled and Multi-walled Carbon Nanotubesmentioning

confidence: 90%

Carbon materials for electrochemical capacitors

Inagaki

Konno

Tanaike

2010

Journal of Power Sources

1,322

651

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“…For these materials, counterions can only reside on the outer surfaces, leading to exohedral supercapacitors. 19 Recently, several experiments have been performed on carbon onions, [20][21][22] and vertically aligned CNT arrays, 23,24 providing results that show superior rate capabilities of exohedral supercapacitors. In particular, those electrodes can be charged at a high rate, approaching electrolytic capacitors.…”

Section: Introductionmentioning

confidence: 99%

Curvature effects in carbon nanomaterials: Exohedral versus endohedral supercapacitors

et al. 2010

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Capacitive energy storage mechanisms in nanoporous carbon supercapacitors hinge on endohedral interactions in carbon materials with macro-, meso-, and micropores that have negative surface curvature. In this article, we show that because of the positive curvature found in zero-dimensional carbon onions or one-dimensional carbon nanotube arrays, exohedral interactions cause the normalized capacitance to increase with decreasing particle size or tube diameter, in sharp contrast to the behavior of nanoporous carbon materials. This finding is in good agreement with the trend of recent experimental data. Our analysis suggests that electrical energy storage can be improved by exploiting the highly curved surfaces of carbon nanotube arrays with diameters on the order of 1 nm.

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“…10(a), which agrees with the CV curve reported for other CNT electrode. 27,28 A CV curve at a potential scan rate of 100 mV s ¹1 in a 0.5 M LiCl solution for the manganese-cobalt-zinc oxide/CNT [grown at 750°C in 50 cm 3 min ¹1 NH 3 as well as in H 2 and treated with nitrogen-plasma (Co pretreated with H 2 plasma)] electrode is show in Fig. 10(b), which shows redox peaks due to a Faradic process occurring in manganese-cobalt-zinc oxide.…”

Section: Resultsmentioning

confidence: 99%

Effects of Parameters for Preparing Carbon Nanotubes on the Capacitances of Manganese-Cobalt-Zinc Oxide/Carbon Nanotube Electrodes

Lin

2013

Electrochemistry

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A Co (catalyst)-Ti-coated silicon foil on which carbon nanotubes (CNTs) are directly grown by thermal chemical vapor deposition (CVD) with/without H 2 and using different temperatures/volume flow rates of NH 3 is optionally pretreated with hydrogen-plasma. Thereafter the CNTs are treated with nitrogen-plasma, and a manganese-cobaltzinc oxide film is deposited on the CNTs by radio frequency sputtering. For the CNT electrode, at the 100th cycle of potential cycling, its specific capacitance at a CNT growing temperature of 750°C is higher than those at 700 or 800°C and the higher the NH 3 flow rate while growing CNTs, the higher the specific capacitance. Furthermore, the specific capacitance of the manganese-cobalt-zinc oxide/CNT electrode for the CNTs grown in 50 cm 3 min −1 NH 3 is higher than that without NH 3 .

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Vertically aligned double-walled carbon nanotube electrode prepared by transfer methodology for electric double layer capacitor

Cited by 32 publications

References 23 publications

Carbon materials for electrochemical capacitors

Carbon materials for electrochemical capacitors

Curvature effects in carbon nanomaterials: Exohedral versus endohedral supercapacitors

Effects of Parameters for Preparing Carbon Nanotubes on the Capacitances of Manganese-Cobalt-Zinc Oxide/Carbon Nanotube Electrodes

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