A study on the effect of lithium insertion-extraction on the local structure of lithium manganese oxides using X-ray absorption spectroscopy

Oh Sung Kwon, Min Seuk Kim, Kwang Bum Kim

Research output: Contribution to journalConference article

11 Citations (Scopus)

Abstract

Electronic and structural aspects of LixMn2O4 electrodes obtained from electrochemical oxidation-reduction process have been investigated by Mn K-edge X-ray absorption fine spectroscopy (XAFS). Charging of LixMn2O4 gave rise to an increase in the intensity of the peak at ca. 6543 eV and a shift of the overall peak positions towards higher energies in normalized X-ray absorption near-edge structure (XANES) spectra. Mean Mn-O bond length was at minimum in the charged state and it increased progressively with lithium insertion. Moreover, the extended X-ray absorption fine structure (EXAFS) spectrum of a second-charged LixMn2O4 electrode was somewhat different from that of the first one partly due to some disorder rendering different site energy.

Original languageEnglish
Pages (from-to)510-516
Number of pages7
JournalJournal of Power Sources
Volume81-82
DOIs
Publication statusPublished - 1999 Jan 1
EventProceedings of the 1998 Ninth International Meeting on Lithium Batteries - Edingburgh, United Kingdom
Duration: 1998 Jul 121998 Jul 17

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All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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