Details

Autor(en) / Beteiligte

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

Titel

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

Ist Teil von

• Energy & environmental science, 2012-01, Vol.5 (1), p.5437-5444

Erscheinungsjahr

2012

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Binder-free and self-standing carbon nanotube (CNT) electrodes of tens of microns in thickness have been assembled viaa 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 similar to 200 W h kg super(-1) at a high power of similar to 10 kW kg super(-1), showing promise as the positive electrode for light-weight, high-power lithium batteries.