Synthesis and electrochemical investigations of Ni1-xO thin films and Ni1-xO on three-dimensional carbon substrates for electrochemical capacitors

Kyung Wan Nam, Eun Sung Lee, Jae Hong Kim, Young Ho Lee, Kwang Bum Kim

Research output: Contribution to journalArticle

93 Citations (Scopus)

Abstract

Nickel oxide/carbon nanotube (Ni1-xO/CNT) film nanocomposite electrodes for electrochemical capacitors were prepared by electrochemically precipitating nickel hydroxide onto a CNT film substrate and heating it in air at 300°C. For comparison, nickel oxide thin film and nickel oxide/carbon paper (Ni1-xO/C paper) electrodes were also prepared via electrochemical route. The nickel oxide layers (∼5 nm thickness) in the Ni1-xO/CNT film electrode were coated uniformly on the surface of the individual CNTs, constructing a 3D nanoporous network structure through the entire thickness of the film. In comparison to the thin film and Ni1-xO/C paper electrodes, the Ni1-xO/CNT film electrode showed a very high specific capacitance of ∼ 1000 F g-1with a high rate capability in 1 M KOH. The Ni1-xO/CNT film electrode also showed a good cycle life during 100 cycles in 1 M KOH. The high specific capacitance and good power characteristics of the Ni1-xO/CNT nanocomposite electrode can be attributed to the construction of an electrode with a very thin film of electroactive materials with a nanometer thickness on a CNT film substrate with a 3D nanoporous network structure.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume152
Issue number11
DOIs
Publication statusPublished - 2005 Jan 1

Fingerprint

Capacitors
Carbon
Thin films
Electrodes
Nickel oxide
Substrates
Capacitance
Carbon Nanotubes
Nanocomposite films
Nickel
Oxide films
Life cycle
Carbon nanotubes
Nanocomposites
Heating
nickel monoxide
Air

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

Cite this

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title = "Synthesis and electrochemical investigations of Ni1-xO thin films and Ni1-xO on three-dimensional carbon substrates for electrochemical capacitors",
abstract = "Nickel oxide/carbon nanotube (Ni1-xO/CNT) film nanocomposite electrodes for electrochemical capacitors were prepared by electrochemically precipitating nickel hydroxide onto a CNT film substrate and heating it in air at 300°C. For comparison, nickel oxide thin film and nickel oxide/carbon paper (Ni1-xO/C paper) electrodes were also prepared via electrochemical route. The nickel oxide layers (∼5 nm thickness) in the Ni1-xO/CNT film electrode were coated uniformly on the surface of the individual CNTs, constructing a 3D nanoporous network structure through the entire thickness of the film. In comparison to the thin film and Ni1-xO/C paper electrodes, the Ni1-xO/CNT film electrode showed a very high specific capacitance of ∼ 1000 F g-1with a high rate capability in 1 M KOH. The Ni1-xO/CNT film electrode also showed a good cycle life during 100 cycles in 1 M KOH. The high specific capacitance and good power characteristics of the Ni1-xO/CNT nanocomposite electrode can be attributed to the construction of an electrode with a very thin film of electroactive materials with a nanometer thickness on a CNT film substrate with a 3D nanoporous network structure.",
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Synthesis and electrochemical investigations of Ni1-xO thin films and Ni1-xO on three-dimensional carbon substrates for electrochemical capacitors. / Nam, Kyung Wan; Lee, Eun Sung; Kim, Jae Hong; Lee, Young Ho; Kim, Kwang Bum.

In: Journal of the Electrochemical Society, Vol. 152, No. 11, 01.01.2005.

Research output: Contribution to journalArticle

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