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Novel Size and Surface Oxide Effects in Silicon Nanowires as Lithium Battery Anodes

Cited 275 time in Web of Science Cited 278 time in Scopus
Authors

McDowell, Matthew T.; Lee, Seok Woo; Ryu, Ill; Wu, Hui; Nix, William D.; Choi, Jang Wook; Cui, Yi

Issue Date
2011-09
Publisher
American Chemical Society
Citation
Nano Letters, Vol.11 No.9, pp.4018-4025
Abstract
With its high specific capacity, silicon is a promising anode material for high-energy lithium-ion batteries, but volume expansion and fracture during lithium reaction have prevented implementation. Si nanostructures have shown resistance to fracture during cycling, but the critical effects of nanostructure size and native surface oxide on volume expansion and cycling performance are not understood. Here, we use an ex situ transmission electron microscopy technique to observe the same Si nanowires before and after lithiation and have discovered the impacts of size and surface oxide on volume expansion. For nanowires with native SiO2, the surface oxide can suppress the volume expansion during lithiation for nanowires with diameters
ISSN
1530-6984
URI
https://hdl.handle.net/10371/164572
DOI
https://doi.org/10.1021/nl202630n
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Ryu, Ill류일
조교수
  • College of Engineering
  • Department of Materials Science & Engineering
Research Area Fundamental deformation mechanisms, Optimal desing in nanostructures, Reliability Analysis in Nanostructures

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