Development of novel mesoporous C-TiO2-SnO2 nanocomposites and their application to anode materials in lithium ion secondary batteries

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Herein, we employed the tetra-constituent co-assembly method based on the acid-base pair of Sn and Ti precursors. Using this method, novel mesoporous carbon-TiO2-SnO2 nanocomposite materials were prepared and their structural change with an increase of SnO2 amount was investigated. In low amount of SnO2, an ordered mesoporous structure was observed but it became collapsed at 64 wt.% SnO2, while crystal size of anatase TiO2 embedded within amorphous SnO2 and carbon matrix became larger. When applied to anode materials in lithium ion batteries, an increase of the reaction peaks of Li+ in SnO2 was observed and peak associated with discharging in TiO2 nano-crystal increased in spite of lower amount of TiO2. This indicated that TiO2 was highly utilized for lithium storage (275 mAh g(-1) in 19.9 wt.% TiO2 case). In the nanocomposite electrode with 28.8% TiO2, however, a high rate performance and a very stable cycle performance (95.3% retention at 40th cycles) were observed, which was attributed to the stable nanostructure. (c) 2011 Elsevier Inc. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2012-03
Language
English
Article Type
Article
Keywords

NEGATIVE-ELECTRODE MATERIAL; TIO2-B NANOWIRES; RUTILE TIO2; CARBON; INTERCALATION; PERFORMANCE; COMPOSITES; INSERTION; XPS

Citation

MICROPOROUS AND MESOPOROUS MATERIALS, v.151, pp.172 - 179

ISSN
1387-1811
DOI
10.1016/j.micromeso.2011.10.040
URI
http://hdl.handle.net/10203/245083
Appears in Collection
CBE-Journal Papers(저널논문)
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