Co(OH)2-combined carbon-nanotube array electrodes for high-performance micro-electrochemical capacitors

Hyo Jin Ahn; Won Bae Kim; Tae Yeon Seong

doi:10.1016/j.elecom.2008.06.018

Co(OH)₂-combined carbon-nanotube array electrodes for high-performance micro-electrochemical capacitors

Hyo Jin Ahn, Won Bae Kim, Tae Yeon Seong

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

47 Citations (Scopus)

Abstract

We have investigated binder-free Co(OH)₂-combined carbon-nanotube (CNT) array electrodes using anodized aluminum oxide (AAO) templates for micro-electrochemical capacitors. It is shown that compared to the capacitors fabricated with CNT only electrodes (6.3 F/cm³ at 100 mV/s), those with the Co(OH)₂-combined CNT array electrodes produce much higher capacitance (12.74 F/cm³ at 100 mV/s) together with superior high-rate capacitance. The improved electrochemical behavior is explained in terms of high capacitance of amorphous Co(OH)₂ electrode and the use of CNT arrays as effective current collector.

Original language	English
Pages (from-to)	1284-1287
Number of pages	4
Journal	Electrochemistry Communications
Volume	10
Issue number	9
DOIs	https://doi.org/10.1016/j.elecom.2008.06.018
Publication status	Published - 2008 Sept

Keywords

AAO
CNT array
Capacitance
Co(OH)
Micro-electrochemical capacitors

ASJC Scopus subject areas

Electrochemistry

Access to Document

10.1016/j.elecom.2008.06.018

Cite this

@article{4430e91731114341a518a4c06bdfe4cc,

title = "Co(OH)2-combined carbon-nanotube array electrodes for high-performance micro-electrochemical capacitors",

abstract = "We have investigated binder-free Co(OH)2-combined carbon-nanotube (CNT) array electrodes using anodized aluminum oxide (AAO) templates for micro-electrochemical capacitors. It is shown that compared to the capacitors fabricated with CNT only electrodes (6.3 F/cm3 at 100 mV/s), those with the Co(OH)2-combined CNT array electrodes produce much higher capacitance (12.74 F/cm3 at 100 mV/s) together with superior high-rate capacitance. The improved electrochemical behavior is explained in terms of high capacitance of amorphous Co(OH)2 electrode and the use of CNT arrays as effective current collector.",

keywords = "AAO, CNT array, Capacitance, Co(OH), Micro-electrochemical capacitors",

author = "Ahn, {Hyo Jin} and Kim, {Won Bae} and Seong, {Tae Yeon}",

year = "2008",

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T1 - Co(OH)2-combined carbon-nanotube array electrodes for high-performance micro-electrochemical capacitors

AU - Ahn, Hyo Jin

AU - Kim, Won Bae

AU - Seong, Tae Yeon

PY - 2008/9

Y1 - 2008/9

N2 - We have investigated binder-free Co(OH)2-combined carbon-nanotube (CNT) array electrodes using anodized aluminum oxide (AAO) templates for micro-electrochemical capacitors. It is shown that compared to the capacitors fabricated with CNT only electrodes (6.3 F/cm3 at 100 mV/s), those with the Co(OH)2-combined CNT array electrodes produce much higher capacitance (12.74 F/cm3 at 100 mV/s) together with superior high-rate capacitance. The improved electrochemical behavior is explained in terms of high capacitance of amorphous Co(OH)2 electrode and the use of CNT arrays as effective current collector.

AB - We have investigated binder-free Co(OH)2-combined carbon-nanotube (CNT) array electrodes using anodized aluminum oxide (AAO) templates for micro-electrochemical capacitors. It is shown that compared to the capacitors fabricated with CNT only electrodes (6.3 F/cm3 at 100 mV/s), those with the Co(OH)2-combined CNT array electrodes produce much higher capacitance (12.74 F/cm3 at 100 mV/s) together with superior high-rate capacitance. The improved electrochemical behavior is explained in terms of high capacitance of amorphous Co(OH)2 electrode and the use of CNT arrays as effective current collector.

KW - AAO

KW - CNT array

KW - Capacitance

KW - Co(OH)

KW - Micro-electrochemical capacitors

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