Characterizations on the structural and electronic properties of thermal lithiated Li0.33MnO2

Y. J. Wei, H. Ehrenberg, K. B. Kim, C. W. Park, Z. F. Huang, C. Baehtz

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

A 3 V cathode material for lithium ion batteries, Li0.33MnO2, was synthesized by solid-state reaction. Two Mn crystallographic positions, Mn(1) and Mn(2), were determined by X-ray diffraction analysis. The [Mn(2)O6] octahedron had a lower symmetrical degree than that of [Mn(1)O6], which was attributed to the geometrical effects of the non-symmetrical environment around Mn(2). Li0.33MnO2 delivered a reversible discharge capacity ∼140 mA h g-1. In situ synchrotron diffraction clearly showed a reversible phase transition of Li0.33MnO2 during electrochemical process. The analysis of X-ray absorption near edge spectroscopy observed the conversion of Mn4+ to Mn3+ with Li+ intercalation into Li0.33MnO2, accompanied by the formation of more severely distorted [MnO6] octahedron.

Original languageEnglish
Pages (from-to)273-277
Number of pages5
JournalJournal of Alloys and Compounds
Volume470
Issue number1-2
DOIs
Publication statusPublished - 2009 Feb 20

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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