Electrochemical and magnetic properties of lithium manganese oxide spinels prepared by oxidation at low temperature of hydrothermally obtained LiMnO2

Mitsuharu Tabuchi, Kazuaki Ado, Christian Masquelier, Ichiro Matsubara, Hikari Sakaebe, Hiroyuki Kageyama, Hironori Kobayashi, Ryoji Kanno, Osamu Nakamura

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32 Citations (Scopus)

Abstract

Cubic and tetragonally distorted lithium manganese oxide spinels (LiMnO2+x) were obtained by progressive oxidation of LiMnO2 between 300 and 400°C. Orthorhombic LiMnO2 was prepared by hydrothermal treatment of either γ-MnOOH or Mn(COOCH3)3 · 2H2O with LiOH · H2O in large excess. The reversible specific capacity for LiMnO2+x was found to be sensitive to average manganese valency changeable by the oxidizing condition. The LiMnO2+x exhibits the ferromagnetic behavior with Tc = 20-40 K and the occurrence of spontaneous magnetic moment is associated with the decrease in the development of ferromagnetic interaction accompanying the decrease in the average shortest Mn-Mn distance between Mn ions on octahedral 16d sites.

Original languageEnglish
Pages (from-to)53-63
Number of pages11
JournalSolid State Ionics
Volume89
Issue number1-2
DOIs
Publication statusPublished - Aug 1 1996
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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