Changes in electronic structure of the electrochemically Li-ion deintercalated LiMn2O4 system investigated by soft X-ray absorption spectroscopy

Won Sub Yoon, Kyung Yoon Chung, Ki Hwan Oh, Kwang Bum Kim

Research output: Contribution to journalConference article

31 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)706-709
Number of pages4
JournalJournal of Power Sources
Volume119-121
DOIs
Publication statusPublished - 2003 Jun 1
EventSelected Papers Presented at the 11th IMLB - Monterey, CA, United States
Duration: 2002 Jun 222002 Jun 28

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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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