This Electrode is Best Served Colda Reversible Electrochemical Lithiation of a Gray Cubic Tin
Journal of solid state electrochemistry(2018)
摘要
The behavior of a cubic allotropic modification of tin (α-Sn) towards lithium electrochemical alloying/de-alloying is reported for the first time. The cycling stability of the α-Sn electrode is superior compared with the cycling stability of the tetragonal white tin (β-Sn). Scanning electron microscopy studies reveal that unlike β-Sn, the α-Sn crystal grains preserve their integrity during the lithiation/delithiation cycles. The shift in the charge/discharge potential stages in the α-Sn electrode with reference to the β-Sn electrode is demonstrated. The potential shift is discussed in terms of differences in the elastic stress—the related component of Gibbs energy of β- and α-Sn lithiation/delithiation processes.
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关键词
Li-ion,Batteries,Anodes,Microstructures
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