Electronic structures of partially fluorinated lithium manganese spinel oxides and their electrochemical properties

Keisuke Matsumoto, Tomokazu Fukutsuka, Toyoki Okumura, Yoshiharu Uchimoto, Koji Amezawa, Minoru Inaba, Akimasa Tasaka

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Partially fluorinated lithium manganese spinel oxides (LiMn1.8Li0.1Ni0.1O4-xFx) were prepared by solid-state reaction. Relationship between the electronic structures of LiMn1.8Li0.1Ni0.1O4-xFx and their electrochemical properties were investigated. X-ray absorption near-edge structure (XANES) of Mn K-edge showed that the absorption edge shifted to lower energy with increasing F- content, which indicated decrease of the Mn average oxidation state. Discharge capacity at first cycle was increased by decrease of the Mn average oxidation state with increasing F- content.

Original languageEnglish
Pages (from-to)599-601
Number of pages3
JournalJournal of Power Sources
Volume189
Issue number1
DOIs
Publication statusPublished - 2009 Apr 1

Keywords

  • Electronic structure
  • Fluorination
  • LiMnO
  • X-ray absorption spectroscopy (XAS)

ASJC Scopus subject areas

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

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