Structure and electrochemical characterization of Li1+xMn2-xO4 spinels for rechargeable lithium batteries

Toshimi Takada, Hiroshi Hayakawa, Hirotoshi Enoki, Etsuo Akiba, Helen Slegr, Isobel Davidson, John Murray

研究成果: ジャーナルへの寄稿会議記事査読

36 被引用数 (Scopus)

抄録

Neutron and X-ray powder diffraction and Rietveld refinements have been carried out for the well-crystallized samples with a homogeneous composition Li1+xMn2-xO4 (0 ≤ x ≤ 0.125). The lattice parameter of these spinels changes with both the composition and the synthesis temperature. SEM and TEM micrographs show that the crystallites appear as single crystals with a size of 0.1-2 μm. The phase transition from cubic Fd3m to orthorhombic Fddd around 280 K of samples Ei1+xMn2-xO4 (x ≤ 0.04) was observed using low temperature XRD and DSC. The orthorhombic phase further converts to a single tetragonal phase I41/amd around 65 K. The charge/discharge capacity, and cyclability of these samples were examined in both the 3 V and the 4 V regions. We found that the discharge capacity as well as the cyclability of the cell Li/Li1+xMn2-xO4 change largely with not only the value of x but also the crystal structure which depends on the synthesis conditions.

本文言語英語
ページ(範囲)505-509
ページ数5
ジャーナルJournal of Power Sources
81-82
DOI
出版ステータス出版済み - 1月 1 1999
外部発表はい
イベントProceedings of the 1998 Ninth International Meeting on Lithium Batteries - Edingburgh, 英国
継続期間: 7月 12 19987月 17 1998

All Science Journal Classification (ASJC) codes

  • 再生可能エネルギー、持続可能性、環境
  • エネルギー工学および電力技術
  • 物理化学および理論化学
  • 電子工学および電気工学

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