α-NaFeO<sub>2</sub>型リチウムマンガン酸化物の水熱合成

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  • Hydrothermal Synthesis of Lithium Manganese Oxide with .ALPHA.-NaFeO2 Structure.
  • Hydrothermal Synthesis of Lithium Manganese Oxide with α-NaFeO2 Structure
  • Hydrothermal Synthesis of Lithium Manganese Oxide with アルファ NaFeO2 Structure

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Hydrothermal synthesis of lithium manganese oxide with α-NaFeO2 structure has been studied. A LixMnO2nH2O, (Li-birnessite), with rhombohedral symmetry was used as a starting material. When the molar ratio of Mn/Al was smaller than 0.9/0.1, spinel type lithium manganese oxides were obtained. On the other hand, when the molar ratio of Mn/Al was larger than 0.85/0.15, metastable lithium manganese oxides with α-NaFeO2 structure formed at 80°C, and the capacity fade of the Li-ion cell with cathodes made of these oxides was very small in comparison with that of cathodes made of layered Li-manganese oxides, as previously reported.

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