Monodisperse Sn Nanocrystals as a Platform for the Study of Mechanical Damage during Electrochemical Reactions with Li

Monodisperse Sn spherical nanocrystals of 10.0 ± 0.2 nm were prepared in dispersible colloidal form. They were used as a model platform to study the impact of size on the accommodation of colossal volume changes during electrochemical lithiation using ex situ transmission electron microscopy (TEM)....

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Veröffentlicht in:	Nano letters 2013-04, Vol.13 (4), p.1800-1805
Hauptverfasser:	Xu, Linping, Kim, Chunjoong, Shukla, Alpesh K, Dong, Angang, Mattox, Tracy M, Milliron, Delia J, Cabana, Jordi
Format:	Artikel
Sprache:	eng
Schlagworte:	Accommodation Colloids - chemistry Cross-disciplinary physics: materials science rheology Crystals Damage Electrochemical Techniques - methods Electrodes Exact sciences and technology Lithium - chemistry Materials science Microscopy, Electron, Transmission Nanocrystalline materials Nanocrystals Nanoparticles - chemistry Nanoscale materials and structures: fabrication and characterization Particle Size Physics Platforms Silicon - chemistry Surface Properties Tin Tin - chemistry Transmission electron microscopy
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Beschreibung
Zusammenfassung:	Monodisperse Sn spherical nanocrystals of 10.0 ± 0.2 nm were prepared in dispersible colloidal form. They were used as a model platform to study the impact of size on the accommodation of colossal volume changes during electrochemical lithiation using ex situ transmission electron microscopy (TEM). Significant mechanical damage was observed after full lithiation, indicating that even crystals at these very small dimensions are not sufficient to prevent particle pulverization that compromises electrode durability.
ISSN:	1530-6984 1530-6992
DOI:	10.1021/nl400418c