Electronic structure of chemically-delithiated LiCoO2 studied by electron energy-loss spectrometry

J. Graetz, A. Hightower, C. C. Ahn, R. Yazami, Peter Rez, B. Fultz

Research output: Contribution to journalArticle

72 Scopus citations

Abstract

The electronic structure of chemically delithiated Li1-xCoO2 (x = -0.02, 0.09, 0.12, 0.20, and 0.28) was investigated by electron energy-loss spectrometry (EELS). The O K edge and Co L2,3 edge were used to probe the density Of unoccupied states around the O and Co ions at different states of lithiation. The O ions accommodate the incoming charge during Li intercalation. The net electron density surrounding the Co ions is less affected. This is in substantial agreement with prior electronic structure calculations of Van der Ven, et al., whose atomic structure data were used in the present calculations of EELS cross-sections. Calculations of the O 2p partial densities of state curves confirm the increase in unoccupied states that accompany Li extraction.

Original languageEnglish (US)
Pages (from-to)1286-1289
Number of pages4
JournalJournal of Physical Chemistry B
Volume106
Issue number6
DOIs
StatePublished - Feb 14 2002

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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