Bottom-up in situ formation of Fe(3)O(4) nanocrystals in a porous carbon foam for lithium-ion battery anodes

Title
Bottom-up in situ formation of Fe(3)O(4) nanocrystals in a porous carbon foam for lithium-ion battery anodes
Author
선양국
Issue Date
2011-11
Publisher
Royal SOC Chemistry
Citation
Journal of Materials Chemistry 2011, 21 43, P17325-17330
Abstract
A facile and scalable process for the in situ formation of Fe3O4 nanocrystals in a pre-formed carbon foam (CF) (Fe3O4/CF) was developed, which involved impregnation of an aqueous iron nitrate solution onto CF followed by controlled thermal treatment in an inert atmosphere. N-2 adsorption/desorption and BET measurements showed that the CF was a mesoporous carbon with a high pore volume and specific surface area. Transmission electron microscopy, scanning electron microscopy, X-ray diffraction measurement, thermogravimetric analysis, and X-ray photoelectron spectroscopy (XPS) revealed that 5-50 nm Fe3O4 nanocrystals at a high loading of 78.7 wt% were formed preferentially in the confined pores of CF. When tested for anode material in a Li ion half-cell, the Fe3O4/CF composite was far superior to unsupported Fe3O4 nanocrystals, exhibiting significantly improved Coulombic efficiencies and cycling stability and achieving >780 mA h g(-1) after 50 deep charge-discharge cycles with >95% cycling efficiency.
URI
http://pubs.rsc.org/en/content/articlehtml/2011/jm/c1jm13450ghttp://hdl.handle.net/20.500.11754/37408
ISSN
0959-9428
DOI
10.1039/c1jm13450g
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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