In situ Raman spectroscopic study of thin-film Li1-xMn2O4 electrodes

Naomi Anzue, Takashi Itoh, Mohamed Mohamedi, Minoru Umeda, Isamu Uchida

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

In order to investigate structural changes in lithium manganese oxide during the insertion and extraction of lithium ions, Raman spectra of thin films of Li1-xMn2O4 produced by electrostatic spray deposition (ESD) were recorded in situ during a voltammetric scan in 1 M LiClO4 in propylene carbonate (PD)/ethylene carbonate (EC) solutions. Five Raman-active bands, as predicted by the theory, were observed for the Li1-xMn2O4 compound. The λ-MnO2 phase has a distinct band at 592 cm-1 and therefore can be clearly recognized from Raman spectra. The changes observed in Raman lines of Li1-xMn2O4 were ascribed to the occurrence of the phase transition of Li1-xMn2O4 electrodes. From the energy-dependence of Raman spectra, it is suggested that each value of x in Li1-xMn2O4 possesses its own electronic band structure.

Original languageEnglish
Pages (from-to)301-307
Number of pages7
JournalSolid State Ionics
Volume156
Issue number3-4
DOIs
Publication statusPublished - 2003 Jan

Keywords

  • Cyclic voltammetry
  • In situ Raman
  • LiMnO
  • Thin-film electrodes

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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