Mössbauer spectrometry as a powerful tool to study lithium reactivity mechanisms for battery electrode materials

L. Aldon, P. Kubiak, A. Picard, P. E. Lippens, J. Olivier-Fourcade, J. C. Jumas

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10 Citations (Scopus)

Abstract

The use of 57Fe as a local Mössbauer probe is of high interest for studying mechanisms induced by lithium insertion. In this way the substitutions Ti/Fe and Li/Fe have been carried out for Li4Ti5O12 to obtain Fe substituted spinel and Li2Ti3O7 ramsdellite. In the case of Li4Ti5O12 iron ions are reduced (FeIII →FeII), then migrate from tetrahedral to octahedral sites allowing us to establish the spinel ↔rocksalt phase transition. Such phase transition definitively explains the welldefined plateau observed in the electrochemical potential curves. In the case of Li2Ti3O7 ramsdellite, all the iron ions are located on octahedral sites and the quadrupole splittings are related to the number of lithium in the neighbourhood of probed atoms.

Original languageEnglish
Pages (from-to)497-503
Number of pages7
JournalHyperfine Interactions
Volume156-157
Issue number1-4
Publication statusPublished - 1 Mar 2004

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Keywords

  • Electrode materials
  • Fe Mössbauer data
  • Lithium insertion mechanism
  • Titanium-based oxides

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

Aldon, L., Kubiak, P., Picard, A., Lippens, P. E., Olivier-Fourcade, J., & Jumas, J. C. (2004). Mössbauer spectrometry as a powerful tool to study lithium reactivity mechanisms for battery electrode materials. Hyperfine Interactions, 156-157(1-4), 497-503.