Oxidation treatment of carbon nanotubes:: An essential process in nanocomposite with RuO2 for supercapacitor electrode materials

被引：17

作者：

Kim, Yong-Tae

Mitani, Tadaoki

机构：

[1] MIT, Dept Engn Mech, Cambridge, MA 02139 USA

[2] Japan Adv Inst Sci & Technol, Sch Mat Sci, Nomi, Ishikawa 9231292, Japan

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 03期

关键词：

D O I：

10.1063/1.2221872

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In the nanocomposite of multiwalled carbon nanotubes (MWNTs) and RuO2 for supercapacitor electrode materials, upon immersion of the purified MWNT into a RuCl3 solution, Ru metal having no contribution to pseudocapacitance was unexpectedly formed on the MWNT surface by spontaneous reduction, because of the higher Fermi level of MWNT than the absolute energy level of Ru/RuCl3 pair. In contrast, no such phenomenon was observed for oxidized MWNT, because of lowered Fermi level and the surface carboxyl groups as protector against charge transfer. The oxidation treatment of MWNT is therefore not optional but rather is an essential process in nanocomposite. (c) 2006 American Institute of Physics.

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页数：3

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