Local structure of LiCoO 2 nanoparticles studied by Co K-edge x-ray absorption spectroscopy

L. Maugeri, A. Iadecola, B. Joseph, L. Simonelli, L. Olivi, M. Okubo, I. Honma, H. Wadati, T. Mizokawa, N. L. Saini

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8 Citations (Scopus)

Abstract

We have studied the local structure of LiCoO 2 nanoparticles by Co K-edge x-ray absorption spectroscopy as a function of particle size. Extended x-ray absorption fine structure data reveal substantial changes in the near neighbor distances and the associated mean square relative displacements with decreasing particle size. X-ray absorption near edge structure spectra show clear local geometrical changes with decreasing particle size, similar to those that appear in the charging (delithiation) process. The results suggest that the LiCoO 2 nanoparticles are characterized by a large atomic disorder confined to the Co-O octahedra, similar to the distortions generated during the delithiation, and this disorder should be the primary limiting factor for a reversible diffusion of Li ions when nanoparticles of LiCoO 2 are used as cathode material in rechargeable Li ion batteries.

Original languageEnglish
Article number335305
JournalJournal of Physics Condensed Matter
Volume24
Issue number33
DOIs
Publication statusPublished - 2012 Aug 22

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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    Maugeri, L., Iadecola, A., Joseph, B., Simonelli, L., Olivi, L., Okubo, M., Honma, I., Wadati, H., Mizokawa, T., & Saini, N. L. (2012). Local structure of LiCoO 2 nanoparticles studied by Co K-edge x-ray absorption spectroscopy. Journal of Physics Condensed Matter, 24(33), [335305]. https://doi.org/10.1088/0953-8984/24/33/335305