Improvement of electrochemical behavior of Sn₂Fe/C nanocomposite anode with Al₂O₃ addition for lithium-ion batteries

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• 作者：Jae-Myung Lee ; Heechul Jung ; Yoon Hwa ; Hansu Kim ; Dongmin Im ; Seok-Gwang Doo ; Hun-Joon Sohn
• 关键词：Anode ; Tin-based nanocomposite ; Lithium-ion battery ; Alumina ; Cycle performance capacity
• 刊名：Journal of Power Sources
• 出版年：2010
• 出版时间：1 August 2010
• 年：2010
• 卷：195
• 期：15
• 页码：5044-5048
• 全文大小：1263 K

文摘

Sn₂Fe/Al₂O₃/C nanocomposites are synthesized using a high-energy, mechanical milling method with thermally synthesized Sn₂Fe, Al₂O₃ and carbon (Super P) powders. The effect of Al₂O₃ addition on the microstructure of the Sn₂Fe/Al₂O₃/C nanocomposites is examined. The electrochemical characteristics of the material as an anode in lithium-ion batteries are also evaluated. High-resolution transmission electron microscopy shows that the crystallite size of active Sn₂Fe in the Sn₂Fe/Al₂O₃/C nanocomposite is smaller than that of the Sn₂Fe/C nanocomposite without Al₂O₃. A decrease in the initial irreversible capacity and enhanced cycle performance of the Sn₂Fe/Al₂O₃/C nanocomposite electrode are observed.