Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/11603
Title: Thickness-dependent fracture of amorphous carbon coating on SnO2 nanowire electrodes
Authors: Li, Q
Li, W
Feng, Q
Wang, P
Mao, M
Liu, J
Zhou, L 
Wang, H
Yao, H 
Issue Date: 2014
Publisher: Elsevier Ltd
Source: Carbon, 2014, v. 80, no. 1, p. 793-798 How to cite?
Journal: Carbon 
Abstract: Carbon-coated SnO2 nanowires (NWs) were fabricated and applied as electrode to study the lithiation process using in situ transmission electron microscopy. A critical coating thickness (9 nm) was found, above which the carbon coating is able to constrain the lithiation- induced expansion of SnO2 core without failure. Theoretical modeling and numerical simulation were performed and revealed that such thickness-dependent fracture can be attributed to the thickness-dependent maximum stress developed in the carbon coating during the lithiation of SnO2 core. Our work provides direct evidence of the mechanical robustness of thick carbon coating and offers a minimum thickness of carbon coating for constraining the deformation of anode materials with large lithiation-induced volume change.
URI: http://hdl.handle.net/10397/11603
ISSN: 0008-6223
DOI: 10.1016/j.carbon.2014.09.035
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