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Uniform hematite nanocapsules based on an anode material for lithium ion batteries

Cited 111 time in Web of Science Cited 113 time in Scopus
Authors
Kim, Hyun Sik; Piao, Yuanzhe; Kang, Soon Hyung; Hyeon, Taeghwan; Sung, Yung-Eun
Issue Date
2010-03
Citation
Electrochemistry Communications, Vol.12 No.3, pp.382-385
Keywords
Lithium ion batteryAnode materialHematiteNanocapsules
Abstract
Uniform alpha-Fe(2)O(3) nanocapsules with a high surface area were synthesized by a novel wrap-bake-peel approach consisting of silica coating, heat treatment and finally the removal of the silica coating layer. The length, diameter and shell thickness of the hematite nanocapsules were about 65, 15 and 5 nm, respectively. The electrochemical properties of the alpha-Fe(2)O(3) nanocapsules were investigated by cyclic voltammetry and charge/discharge measurements. The alpha-Fe(2)O(3) nanocapsules showed a high reversible capacity of 888 mAh/g in the initial cycle and 740 mAh/g after 30 cycles as well as good capacity retention. This excellent electrochemical performance was attributed to the high surface area, thin shell and volume space of the hollow structure. (C) 2010 Elsevier B.V. All rights reserved.
ISSN
1388-2481
URI
http://hdl.handle.net/10371/166244
DOI
https://doi.org/10.1016/j.elecom.2009.12.040
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Chemical Convergence for Energy and Environment (에너지환경 화학융합기술전공)Journal Papers (저널논문_에너지환경 화학융합기술전공)
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