Multiple Electron Reaction of Li<sub>2</sub>RuO<sub>3</sub> Electrode for Lithium Batteries

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  • TAMINATO Sou
    Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology
  • HIRAYAMA Masaaki
    Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology
  • YAMAMOTO Kunimitsu
    Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology
  • ZHENG Yueming
    Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology
  • KANNO Ryoji
    Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology

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Other Title
  • リチウム電池電極材料Li<sub>2</sub>RuO<sub>3 </sub>の多電子反応
  • リチウム デンチ デンキョク ザイリョウ Li ₂ RuO ₃ ノ タデンシ ハンノウ

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Abstract

Lithium excess layered rocksalt material Li2RuO3 was synthesized by a solid-state reaction, and intercalation properties were characterized by electrochemical and structural investigations. The first discharge capacities of the Li2RuO3 electrode operated in charge/discharge ranges of 3.0−4.5 V, 1.0−4.5 V and 0.5−4.5 V were 165 mAh g−1, 450 mAh g−1, and 845 mAh g−1, respectively. X-ray absorption near edge structure spectra indicated that the valence states of Ru ions reversibly changed between 5+ and 0 at the range of 1.0−4.5 V. The Li2RuO3 electrode reversibly delivered a five-electron reaction in the charge/discharge ranges of 1.0−4.5 V.

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