Sb:SnO2@TiO2 Heteroepitaxial Branched Nanoarchitectures for Li Ion Battery Electrodes

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• 作者：Sangbaek Park ; Seung-Deok Seo ; Sangwook Lee ; Se Won Seo ; Kyung-Soo Park ; Chan Woo Lee ; Dong-Wan Kim ; Kug Sun Hong
• 刊名：The Journal of Physical Chemistry C
• 出版年：2012
• 出版时间：October 18, 2012
• 年：2012
• 卷：116
• 期：41
• 页码：21717-21726
• 全文大小：732K
• 年卷期：v.116,no.41(October 18, 2012)
• ISSN：1932-7455

文摘

High-quality, single-crystalline Sb-doped SnO₂ (ATO) nanobelts (NBs) surrounded by very thin and short TiO₂ rutile nanorods were synthesized by thermal evaporation followed by chemical bath deposition. An epitaxial relationship between ATO NBs and rutile-phase TiO₂ nanorods was clearly demonstrated on the basis of a crystallographic approach through high-resolution transmission electron microscopy analysis. Furthermore, the ATO@TiO₂ heteronanostructures as anodes for Li ion batteries showed enhanced cycling stability and superior rate capabilities. These improved electrochemical performances were attributed to beneficial geometrical, structural, and doping effects such as alleviation of volume expansion, epitaxial growth, and high electronic conductivity.