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Issue 33, 2011
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Controlled synthesis of SnO2@carbon core-shell nanochains as high-performance anodes for lithium-ion batteries

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Abstract

A new low-flow-rate inert atmosphere strategy has been demonstrated for the synthesis of perfect SnO2@carbon core-shell nanochains (SCNCs) by carbonization of an SnO2@carbonaceous polysaccharide (CPS) precursor at a relatively high temperature. This strategy results in the thorough carbonization of CPS whilst avoiding the carbothermal reduction of SnO2 at 700 °C. It has been investigated that a moderate carbon content contributes to the 1-D growth of SCNCs, and the thickness of the carbon shell can be easily manipulated by varying the hydrothermal treatment time in the precursor process. Such a unique nanochain architecture could afford a very high lithium storage capacity as well as resulting in a desirable cycling performance. SCNCs with about 8 nm carbon shell synthesized by optimized routes were demonstrated for optimal electrochemical performances. More than 760 mAh g¬1 of reversible discharge capacity was achieved at a current density of 300 mA g−1, and above 85% retention can be obtained after 100 charge-discharge cycles. TEM analysis of electrochemically-cycled electrodes indicates that the structural integrity of the SnO2@carbon core-shell nanostructure is retained during electrochemical cycling, contributing to the good cycleability demonstrated by the robust carbon shell.

Graphical abstract: Controlled synthesis of SnO2@carbon core-shell nanochains as high-performance anodes for lithium-ion batteries

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Publication details

The article was received on 01 Apr 2011, accepted on 26 May 2011 and first published on 20 Jul 2011


Article type: Paper
DOI: 10.1039/C1JM11364J
Citation: J. Mater. Chem., 2011,21, 12295-12302
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    Controlled synthesis of SnO2@carbon core-shell nanochains as high-performance anodes for lithium-ion batteries

    X. Yu, S. Yang, B. Zhang, D. Shao, X. Dong, Y. Fang, Z. Li and H. Wang, J. Mater. Chem., 2011, 21, 12295
    DOI: 10.1039/C1JM11364J

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