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

Hyo Jin Ahn, Won Bae Kim, Tae Yeon Seong

Research output: Contribution to journalArticle

41 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 languageEnglish
Pages (from-to)1284-1287
Number of pages4
JournalElectrochemistry Communications
Volume10
Issue number9
DOIs
Publication statusPublished - 2008 Sep

Keywords

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

ASJC Scopus subject areas

  • Electrochemistry

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