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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Yang Yang
  • Jian-Guo Ren
  • Xin Wang
  • Ying-San Chui
  • Qi-Hui Wu
  • Xianfeng Chen

Detail(s)

Original languageEnglish
Pages (from-to)8689-8694
Journal / PublicationNanoscale
Volume5
Issue number18
Publication statusPublished - 21 Sep 2013

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. © 2013 The Royal Society of Chemistry.

Citation Format(s)

Graphene encapsulated and SiC reinforced silicon nanowires as an anode material for lithium ion batteries. / Yang, Yang; Ren, Jian-Guo; Wang, Xin; Chui, Ying-San; Wu, Qi-Hui; Chen, Xianfeng; Zhang, Wenjun.

In: Nanoscale, Vol. 5, No. 18, 21.09.2013, p. 8689-8694.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review