Low-temperature and template-free fabrication of cobalt oxide acicular nanotube arrays and their applications in supercapacitors

Chung Wei Kung; Yu Heng Cheng; Chuan Ming Tseng; Li Yao Chou; Kuo Chuan Ho

doi:10.1039/c4ta06811d

Low-temperature and template-free fabrication of cobalt oxide acicular nanotube arrays and their applications in supercapacitors

Chung Wei Kung, Yu Heng Cheng, Chuan Ming Tseng, Li Yao Chou, Kuo Chuan Ho

Department of Chemical Engineering

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

13 Citations (Scopus)

Abstract

Layered cobalt carbonate hydroxide (LCCH) acicular nanorod arrays (ANRAs) grown on a graphite substrate are converted to Co₃O₄ acicular nanotube arrays (ANTAs) via the anion-exchange reaction and Kirkendall effect at low temperature. The Co₃O₄ ANTAs exhibit an area capacitance of 369 mF cm^-2 and a specific capacitance of 979 F g^-1 at 2.5 mA cm^-2, which are much higher than those of the Co₃O₄ ANRAs prepared by calcining the LCCH ANRAs at 350 °C (64.5 mF cm^-2 and 191 F g^-1).

Original language	English
Pages (from-to)	4042-4048
Number of pages	7
Journal	Journal of Materials Chemistry A
Volume	3
Issue number	7
DOIs	https://doi.org/10.1039/c4ta06811d
Publication status	Published - 2015 Feb 21

All Science Journal Classification (ASJC) codes

General Chemistry
Renewable Energy, Sustainability and the Environment
General Materials Science

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10.1039/c4ta06811d

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title = "Low-temperature and template-free fabrication of cobalt oxide acicular nanotube arrays and their applications in supercapacitors",

abstract = "Layered cobalt carbonate hydroxide (LCCH) acicular nanorod arrays (ANRAs) grown on a graphite substrate are converted to Co3O4 acicular nanotube arrays (ANTAs) via the anion-exchange reaction and Kirkendall effect at low temperature. The Co3O4 ANTAs exhibit an area capacitance of 369 mF cm-2 and a specific capacitance of 979 F g-1 at 2.5 mA cm-2, which are much higher than those of the Co3O4 ANRAs prepared by calcining the LCCH ANRAs at 350 °C (64.5 mF cm-2 and 191 F g-1).",

author = "Kung, {Chung Wei} and Cheng, {Yu Heng} and Tseng, {Chuan Ming} and Chou, {Li Yao} and Ho, {Kuo Chuan}",

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doi = "10.1039/c4ta06811d",

language = "English",

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T1 - Low-temperature and template-free fabrication of cobalt oxide acicular nanotube arrays and their applications in supercapacitors

AU - Kung, Chung Wei

AU - Cheng, Yu Heng

AU - Tseng, Chuan Ming

AU - Chou, Li Yao

AU - Ho, Kuo Chuan

PY - 2015/2/21

Y1 - 2015/2/21

N2 - Layered cobalt carbonate hydroxide (LCCH) acicular nanorod arrays (ANRAs) grown on a graphite substrate are converted to Co3O4 acicular nanotube arrays (ANTAs) via the anion-exchange reaction and Kirkendall effect at low temperature. The Co3O4 ANTAs exhibit an area capacitance of 369 mF cm-2 and a specific capacitance of 979 F g-1 at 2.5 mA cm-2, which are much higher than those of the Co3O4 ANRAs prepared by calcining the LCCH ANRAs at 350 °C (64.5 mF cm-2 and 191 F g-1).

AB - Layered cobalt carbonate hydroxide (LCCH) acicular nanorod arrays (ANRAs) grown on a graphite substrate are converted to Co3O4 acicular nanotube arrays (ANTAs) via the anion-exchange reaction and Kirkendall effect at low temperature. The Co3O4 ANTAs exhibit an area capacitance of 369 mF cm-2 and a specific capacitance of 979 F g-1 at 2.5 mA cm-2, which are much higher than those of the Co3O4 ANRAs prepared by calcining the LCCH ANRAs at 350 °C (64.5 mF cm-2 and 191 F g-1).

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Low-temperature and template-free fabrication of cobalt oxide acicular nanotube arrays and their applications in supercapacitors

Abstract

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