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

研究成果: Article

102 引用 (Scopus)

抜粋

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.

元の言語English
ページ(範囲)5437-5444
ページ数8
ジャーナルEnergy and Environmental Science
5
発行部数1
DOI
出版物ステータスPublished - 2012 1 1
外部発表Yes

ASJC Scopus subject areas

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

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