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Park, Soojin
Nano-Functional Materials Lab
Research Interests
  • Block Copolymers, nanostructured materials for Lithium-Ion batteries, wearable and stretchable energy storage applications

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Helical Silicon/Silicon Oxide Core-Shell Anodes Grown onto the Surface of Bulk Silicon

Cited 29 times inthomson ciCited 25 times inthomson ci
Title
Helical Silicon/Silicon Oxide Core-Shell Anodes Grown onto the Surface of Bulk Silicon
Author
Yoo, HanaLee, Jung-InKim, HyunjungLee, Jung-PilCho, JaephilPark, Soojin
Keywords
Anode material; Bulk silicon; Core-shell; Cycling performance; Electrochemical performance; High specific capacity; High-temperature annealing; Lithiation; Lithium ion batteries; Nanocoils; Nanostructured composites; Urchin-like; Volumetric capacity
Issue Date
201110
Publisher
AMER CHEMICAL SOC
Citation
NANO LETTERS, v.11, no.10, pp.4324 - 4328
Abstract
We demonstrate a simple route for preparing Si/SiO(x) urchin-like structures in which Si/SiO(x) core-shell nanocoils protruded out from the surface of bulk Si, via high-temperature annealing of Pt-decorated Si powders. The carbon-coated urchin-like anodes with micro- and nanostructured composite exhibit a significantly improved electrochemical performance with a high specific capacity of 1600 mAh/g and a superior cycling performance of 70 cycles at a rate of 0.2 C due to the nanocoil conformation and SiO(x) buffer layer. More importantly, the composite results in a significantly enhanced the volumetric capacity with similar to 3780 mAh/cc, compared to bulk Si (similar to 2720 mAh/cc) after fully lithiation to 0 V.
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DOI
http://dx.doi.org/10.1021/nl202417c
ISSN
1530-6984
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