The electronic structure of the electrochemically Li-ion deintercalated Li1-xMn2O4 system has been investigated for various Li compositions using soft X-ray absorption spectroscopy (XAS) for oxygen K-edge and Mn LII,III-edge. To get reasonably good XAS spectra for the electrochemically Li-ion deintercalated Li1-xMn2O4 system, we made a binder free LiMn2O4 film electrode using electrostatic spray deposition (ESD) technique. From the Mn LII,III-edge XAS, it is found that the peak shifts to higher energy with the Li-ion deintercalation and this is due to the increase of the average oxidation state of the Mn ion. From the oxygen K-edge XAS, the Li-ion deintercalation gives rise to a gradual increase in pre-edge peak intensity but mostly does not effect its peak shape.
|Number of pages||4|
|Journal||Journal of Power Sources|
|Publication status||Published - 2003 Jun 1|
|Event||Selected Papers Presented at the 11th IMLB - Monterey, CA, United States|
Duration: 2002 Jun 22 → 2002 Jun 28
Bibliographical noteFunding Information:
This work was supported by the Brain Korea 21. The authors are grateful to authorities at the PLS for X-ray absorption spectroscopic measurements. This work was also supported in part by the Ministry of Information & Communication of Korea (“Support Project of University Information Technology Research Center” supervised by KIPA).
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