Mechanochemical synthesis of α-Fe₂O₃ nanoparticles and their application to all-solid-state lithium batteries

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• 作者：Hirokazu Kitaura ; Kenji Takahashi ; Fuminori Mizuno ; Akitoshi Hayashi ; Kiyoharu Tadanaga ; Masahiro Tatsumisago
• 关键词：Lithium ; Fe₂O₃ ; All-solid-state ; Batteries ; Mechanochemical ; Nanoparticles
• 刊名：Journal of Power Sources
• 出版年：2008
• 出版时间：15 August 2008
• 年：2008
• 卷：183
• 期：1
• 页码：418-421
• 全文大小：731 K

文摘

α-Fe₂O₃ fine particles have been prepared by a mechanochemical process and a solution process. α-Fe₂O₃ nanoparticles with aggregates composed of the several tens nm primary particles were produced by the mechanochemical process. The nanoparticles were applied to the electrode as an active material for all-solid-state lithium batteries and the electrochemical properties of the cell were investigated. Typical charge–discharge curves, as seen in the liquid type cell using the α-Fe₂O₃ nanoparticles as an electrode were observed in the all-solid-state cell. The first discharge capacity of the cell of about 780 mAh g⁻¹ was, however, smaller than the capacity of a cell using α-Fe₂O₃ particles prepared by the solution process, which were monodispersed particles of 250 nm without aggregates. In order to develop electrochemical performance of all-solid-state batteries, it is important to use the electrode particles without aggregation which lead to the formation of good solid–solid interface between active material and solid electrolyte particles.C