Electrochemical lithium insertion of heat treated and chemically modified multi-wall carbon nanotubes

H. Touhara, I. Mukhopadhyay, F. Okino, S. Kawasaki, T. Kyotani, A. Tomita, W. K. Hsu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Highly aligned multi-wall carbon nanotubes (MWNTs), in the form of membrane (CNM) and powder (MWNTP) were examined for Li ion insertion host in aprotic medium. Effects of heat treatment and surface modification by elemental fluorine on the structure and electrochemical properties of the nanotubes were investigated. The surface structure and properties were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and N2 adsorption isotherm. The BET surface area of the nanotubes was very large compared to graphitic carbon. Heat treatment at 3000°C induced better crystallinity with a decrease in surface area. Fluorination at 50°C removed the disorder carbon from the surface of pristine sample. The reversible capacity in the first cycle was 516 mAh/g with a very high irreversible capacity. The reversible capacity increased from 22% to 80% after the second cycle.

Original languageEnglish
Title of host publicationNanonetwork Materials
Subtitle of host publicationFullerenes, Nanotubes, and Related Systems
EditorsTsuneya Ando, Yoshihiro Iwasawa, Koichi Kikuchi, Yahachi Saito, Susumu Saito, Mototada Kobayashi
PublisherAmerican Institute of Physics Inc.
Pages249-252
Number of pages4
ISBN (Electronic)0735400326, 9780735400320
DOIs
Publication statusPublished - 2001 Oct 16
EventInternational Symposium on Nanonetwork Materials: Fullerenes, Nanotubes, and Related Systems 2001 - Kamakura, Japan
Duration: 2001 Jan 152001 Jan 18

Publication series

NameAIP Conference Proceedings
Volume590
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherInternational Symposium on Nanonetwork Materials: Fullerenes, Nanotubes, and Related Systems 2001
Country/TerritoryJapan
CityKamakura
Period01/1/1501/1/18

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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