Raman study on electrochemical lithium insertion into multiwalled carbon nanotubes

Ahm Kim Yoong, Masashito Kojima, Hiroyuki Muramatsu, Daisuke Shimamoto, Takuya Hayashi, Morinobu Endo, Mauricio Terrones, Mildred S. Dresselhaus

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

We have carried out in situ Raman studies during the electrochemical insertion of lithium ions (Li+) into pristine and thermally treated multiwalled carbon nanotubes (MWNTs). We found an improved structural integrity as well as the removal of defects in the thermally treated tubes. The different Li+ insertion behaviors above 0.5 V in as-grown and thermally treated tubes could be explained by the presence of defects on the outer surface of the tubes. No change of Raman spectra from 2.8 to 0.8 V is characterized by the coverage of Li+ on the outer surface of tubes, whereas the upshift of G band and the absence of a separated G band below 0.75 V indicate the formation of diluted graphite intercalation below the stage-2 phase (LiC 12).

Original languageEnglish (US)
Pages (from-to)1183-1188
Number of pages6
JournalJournal of Raman Spectroscopy
Volume39
Issue number9
DOIs
StatePublished - Sep 2008

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Spectroscopy

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