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Sandwich-like CNTs/Si/C nanotubes as high performance anode materials for lithium-ion batteries

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Abstract

Co-axial silicon-coated carbon nanotubes (CNTs/Si) were successfully synthesized via a hydrothermal method. Sandwich-like carbon-coated CNTs/Si were obtained by an additional carbon coating. The as-prepared materials show superior cycling performance as anode materials in lithium ion batteries with a current density as high as 500 mA g−1 with no observable structural changes during the charge/discharge process. In addition, stable reversible discharge capacities as high as 1508.5 mA h g−1 after 1000 cycles were obtained. At higher current densities of 1 A g−1 and 2 A g−1, the CNTs/Si/C nanotubes also showed ideal cycling performance with reversible discharge capacities of 1216.6 mA h g−1 and 932.2 mA h g−1, respectively. The sandwich-like hollow tube structure of CNTs/Si/C not only alleviates the volume change during cycling, but also facilitates Li-ion and electron transport, and stabilizes the SEI layer. These results suggest that sandwich-like CNTs/Si/C nanotubes are a promising anode material for lithium ion batteries.

Graphical abstract: Sandwich-like CNTs/Si/C nanotubes as high performance anode materials for lithium-ion batteries

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Publication details

The article was received on 20 May 2018, accepted on 04 Jul 2018 and first published on 05 Jul 2018


Article type: Paper
DOI: 10.1039/C8TA04686G
Citation: J. Mater. Chem. A, 2018, Advance Article
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    Sandwich-like CNTs/Si/C nanotubes as high performance anode materials for lithium-ion batteries

    R. Liu, C. Shen, Y. Dong, J. Qin, Q. Wang, J. Iocozzia, S. Zhao, K. Yuan, C. Han, B. Li and Z. Lin, J. Mater. Chem. A, 2018, Advance Article , DOI: 10.1039/C8TA04686G

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