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Issue 18, 2013
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Graphene encapsulated and SiC reinforced silicon nanowires as an anode material for lithium ion batteries

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Abstract

Anode materials play a key role in the performance, in particular the capacity and lifetime, of lithium ion batteries (LIBs). Silicon has been demonstrated to be a promising anode material due to its high specific capacity, but pulverization during cycling and formation of an unstable solid-electrolyte interphase limit its cycle life. Herein, we show that anodes consisting of an active silicon nanowire (Si NW), which is surrounded by a uniform graphene shell and comprises silicon carbide nanocrystals, are capable of serving over 500 cycles in half cells at a high lithium storage capacity of 1650 mA h g−1. In the anodes, the graphene shell provides a highly-conductive path and prevents direct exposure of Si NWs to electrolytes while the SiC nanocrystals may act as a rigid backbone to retain the integrity of the Si NW in its great deformation process caused by repetitive charging–discharging reactions, resulting in a stable cyclability.

Graphical abstract: Graphene encapsulated and SiC reinforced silicon nanowires as an anode material for lithium ion batteries

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Publication details

The article was received on 29 May 2013, accepted on 09 Jul 2013 and first published on 12 Jul 2013


Article type: Paper
DOI: 10.1039/C3NR02788K
Citation: Nanoscale, 2013,5, 8689-8694
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    Graphene encapsulated and SiC reinforced silicon nanowires as an anode material for lithium ion batteries

    Y. Yang, J. Ren, X. Wang, Y. Chui, Q. Wu, X. Chen and W. Zhang, Nanoscale, 2013, 5, 8689
    DOI: 10.1039/C3NR02788K

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