Preparation of lithium manganese oxides containing iron

Mitsuharu Tabuchi, Hikari Shigemura, Kazuaki Ado, Hironori Kobayashi, Hikari Sakaebe, Hiroyuki Kageyama, Ryoji Kanno

Research output: Contribution to journalConference articlepeer-review

60 Citations (Scopus)


Preparation of LiFeO2-Li2MnO3 solid solution has been attempted using hydrothermal and solid state reactions. Three 10% Fe-doped Li2MnO3 samples (Fe/(Fe + Mn) = 0.1) with different average particle sizes could be obtained by both methods. The initial charge capacities for these cathodes were sensitive to the preparation method; the capacity up to 4.3 V is 45 mAh/g for the hydrothermally-obtained sample, 24 mAh/g for the post-annealed sample after hydrothermal-treatment at 673 K, and 6 mAh/g for the sample obtained by solid state reaction at 1173 K. 57Fe Mössbauer spectra detect the oxidation of Fe3+ to Fe4+/reduction of Fe4+ to Fe3+ after initial charging/discharging for the hydrothermally obtained sample. The observed Fe3+/4+ redox voltage is between 4.0 and 4.5 V which is lower than that predicted (5 V) for Fe-doped LiMn2O4. This suggests that hydrothermally synthesized Fe-doped Li2MnO3 is an environmentally-friendly candidate as cathode material, involving a Fe3+/4+ redox reaction for rechargeable lithium batteries.

Original languageEnglish
Pages (from-to)415-419
Number of pages5
JournalJournal of Power Sources
Publication statusPublished - Jul 2001
Externally publishedYes
Event10th International Meeting on Lithium Batteries - Como, Italy
Duration: May 28 2001Jun 2 2001

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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