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.
|Number of pages||7|
|Journal||Journal of Power Sources|
|Publication status||Published - 1999 Sep|
|Event||Proceedings of the 1998 Ninth International Meeting on Lithium Batteries - Edingburgh, United Kingdom|
Duration: 1998 Jul 12 → 1998 Jul 17
Bibliographical noteFunding Information:
This study was supported by Korea Science and Engineering Foundation (No. 96-0300-17-01-03). Experiments at PLS were supported in part by MOST and POSCO.
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