Self-standing positive electrodes of oxidized few-walled carbon nanotubes for light-weight and high-power lithium batteries

Seung Woo Lee, Betar M. Gallant, Youngmin Lee, Noboru Yoshida, Dong Young Kim, Yuki Yamada, Suguru Noda, Atsuo Yamada, Shao Horn Yang

Research output: Contribution to journalArticle

92 Citations (Scopus)

Abstract

Binder-free and self-standing carbon nanotube (CNT) electrodes of tens of microns in thickness have been assembled via a vacuum-filtration process of oxidized few-walled CNTs (FWNTs), with different amounts of oxygen functional groups on FWNTs. Sub-millimetre long FWNTs can provide high electrical conductivity and mechanical strength in self-standing porous networks by reducing the number of junctions among FWNTs. We show that the gravimetric capacity of FWNT electrodes in lithium cells can be enhanced by increasing oxygen functional groups on FWNTs, which results from Faradaic reactions between lithium ions and surface oxygen functional groups. These self-standing FWNT electrodes (free of binder/additive and current collector) can provide a high gravimetric energy of ∼200 W h kg -1 at a high power of ∼10 kW kg -1, showing promise as the positive electrode for light-weight, high-power lithium batteries.

Original languageEnglish
Pages (from-to)5437-5444
Number of pages8
JournalEnergy and Environmental Science
Volume5
Issue number1
DOIs
Publication statusPublished - 2012 Jan
Externally publishedYes

Fingerprint

Carbon Nanotubes
Lithium batteries
lithium
Carbon nanotubes
electrode
Functional groups
functional group
Electrodes
Oxygen
Lithium
oxygen
Binders
Strength of materials
electrical conductivity
Vacuum
Ions
carbon nanotube
battery
ion
energy

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Environmental Chemistry
  • Pollution
  • Nuclear Energy and Engineering

Cite this

Self-standing positive electrodes of oxidized few-walled carbon nanotubes for light-weight and high-power lithium batteries. / Lee, Seung Woo; Gallant, Betar M.; Lee, Youngmin; Yoshida, Noboru; Kim, Dong Young; Yamada, Yuki; Noda, Suguru; Yamada, Atsuo; Yang, Shao Horn.

In: Energy and Environmental Science, Vol. 5, No. 1, 01.2012, p. 5437-5444.

Research output: Contribution to journalArticle

Lee, Seung Woo ; Gallant, Betar M. ; Lee, Youngmin ; Yoshida, Noboru ; Kim, Dong Young ; Yamada, Yuki ; Noda, Suguru ; Yamada, Atsuo ; Yang, Shao Horn. / Self-standing positive electrodes of oxidized few-walled carbon nanotubes for light-weight and high-power lithium batteries. In: Energy and Environmental Science. 2012 ; Vol. 5, No. 1. pp. 5437-5444.
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AU - Noda, Suguru

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