Tin microparticles for a lithium ion battery anode with enhanced cycling stability and efficiency derived from Se-doping

In a 100 cycle test at 0.5 C-rate a negative electrode formed of micro-sized Sn 0.9 Se 0.1 particles retains a specific capacity of 500 mA h g −1 with a coulombic efficiency of 99.6%. In contrast, a control electrode made with pure Sn retains only a 200 mA h g −1 capacity with a 98.7% efficiency. Th...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2015-01, Vol.3 (25), p.13500-13506
Main Authors: Dang, Hoang X., Klavetter, Kyle C., Meyerson, Melissa L., Heller, Adam, Mullins, C. Buddie
Format: Article
Language:English
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Summary:In a 100 cycle test at 0.5 C-rate a negative electrode formed of micro-sized Sn 0.9 Se 0.1 particles retains a specific capacity of 500 mA h g −1 with a coulombic efficiency of 99.6%. In contrast, a control electrode made with pure Sn retains only a 200 mA h g −1 capacity with a 98.7% efficiency. The improvement in electrochemical performance of the Sn/Se alloy is attributed to the reduced inactive Se-phase preventing agglomeration of Sn to a size susceptible to particle fracture. The Sn/Se alloy particles are manufacturable, being made by melting the 9 : 1 atomic ratio mixture of Sn and Se, quenching and jet-milling.
ISSN:2050-7488
2050-7496
DOI:10.1039/C5TA02131F