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One-pot synthesis of core–shell structured Sn/carbon nanotube by chemical vapor deposition and its Li-storage properties

  • Yunxiao Zheng (a1), Jian Xie (a1), Wentao Song (a1), Shuangyu Liu (a1), Gaoshao Cao (a1) and Xinbing Zhao (a1)...

Abstract

Core–shell structured Sn/carbon nanotube (CNT) was prepared by one-pot chemical vapor deposition (CVD) method in N2/C2H2 (10% C2H2) using nanosized SnO2 as the starting material. The obtained one-dimensional material is composed of a disordered carbon shell and a single-crystalline Sn nanorod core. The diameter of the Sn nanorod and the thickness of the carbon shell are around 40–50 and 4–5 nm, respectively, when the CVD reaction was carried out at 650 °C for 2 h. The core–shell structured Sn/CNT exhibits improved electrochemical performance compared with bare Sn with a diameter of around 100 nm. A reversible capacity of around 350 mAh/g can be retained after 20 cycles at 50 mA/g for Sn/CNT, while for bare Sn, the capacity drops rapidly to 100 mAh/g after the same cycles.

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a)Address all correspondence to this author. e-mail: xiejian1977@zju.edu.cn

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One-pot synthesis of core–shell structured Sn/carbon nanotube by chemical vapor deposition and its Li-storage properties

  • Yunxiao Zheng (a1), Jian Xie (a1), Wentao Song (a1), Shuangyu Liu (a1), Gaoshao Cao (a1) and Xinbing Zhao (a1)...

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