Lithium insertion鈥揹einsertion mechanism in NbSn<sub>2sub> anode studied by <sup>119sup>Sn M枚ssbauer spectroscopy

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• 作者：S. Naille ; M. Mouyane ; M. El Amraoui ; P.-E. Lippens ; J.-C. Jumas and J. Olivier-Fourcade
• 关键词：NbSn2 ; Lithium ; ion batteries ; Negative electrode ; 119Sn M枚ssbauer spectroscopy
• 刊名：Hyperfine Interactions
• 出版时间：November, 2008
• 出版年：2008
• 期刊代码：18_03043843
• 类别：cp
• 卷：187
• 期：1-3
• 页码：19-26
• 数据来源：sp

摘要

This article deals with the study of the electrochemical performances and the lithium insertion-deinsertion mechanism by mean of 119Sn M枚ssbauer spectroscopy of NbSn<sub>2sub>. The first discharge shows a plateau at 0.05 V vs. Li + /Li0 corresponding to a displacement reaction with the formation of Li<sub>7sub>Sn<sub>2sub>. A specific capacity of 487 mAh/g can be reached during this first discharge.