Single-Crystal Intermetallic M−Sn (M = Fe, Cu, Co, Ni) Nanospheres as Negative Electrodes for Lithium-Ion Batteries

FeSn2, Cu6Sn5, CoSn3, and Ni3Sn4 single-crystalline nanospheres with a characteristic uniform particle size of ∼40 nm have been synthesized via a modified polyol process, aiming at determining and understanding their intrinsic cycling performance as negative electrode materials for lithium-ion batte...

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Bibliographic Details
Published in:ACS applied materials & interfaces 2010-05, Vol.2 (5), p.1548-1551
Main Authors: Wang, Xiao-Liang, Han, Wei-Qiang, Chen, Jiajun, Graetz, Jason
Format: Article
Language:English
Subjects:
Anions
Crystallization - methods
Electric Power Supplies
Electrodes
Equipment Design
Equipment Failure Analysis
Lithium - chemistry
Metals - chemistry
Nanospheres - chemistry
Nanospheres - ultrastructure
Nanotechnology - instrumentation
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Summary:FeSn2, Cu6Sn5, CoSn3, and Ni3Sn4 single-crystalline nanospheres with a characteristic uniform particle size of ∼40 nm have been synthesized via a modified polyol process, aiming at determining and understanding their intrinsic cycling performance as negative electrode materials for lithium-ion batteries. We find that, in this morphologically controlled condition, the reversible capacities follow FeSn2 > Cu6Sn5 ≈ CoSn3 > Ni3Sn4, which is not directly decided by their theoretical capacities or lithium-driven volume changes. FeSn2 exhibits the best electrochemical activity among these intermetallic nanospheres and an effective solid electrolyte interface, which explains its superior cycling performance. The small particle dimension also improves cycling stability and Li+ diffusion.
ISSN:1944-8244
1944-8252
DOI:10.1021/am100218v