Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 12, Issue 3, Pages 382-385Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2009.12.040
Keywords
Lithium ion battery; Anode material; Hematite; Nanocapsules
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Funding
- Ministry of Education, Science Technology [R31-10013]
- Division of Advanced Batteries in the NGE (Next generation engine) Program
- Korea Science and Engineering Foundation (KOSEF)
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Uniform alpha-Fe2O3 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-Fe2O3 nanocapsules were investigated by cyclic voltammetry and charge/discharge measurements. The alpha-Fe2O3 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.
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