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

Research output: Contribution to journalArticlepeer-review

12 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 languageEnglish
Pages (from-to)4042-4048
Number of pages7
JournalJournal of Materials Chemistry A
Volume3
Issue number7
DOIs
Publication statusPublished - 2015 Feb 21

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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