CuGeO₃ nanowires covered with graphene as anode materials of lithium ion batteries with enhanced reversible capacity and cyclic performance.

نویسندگان

  • Songping Wu
  • Rui Wang
  • Zhuolin Wang
  • Zhiqun Lin
چکیده

A facile one-step route was developed to synthesize crystalline CuGeO₃ nanowire/graphene composites (CGCs). Crystalline CuGeO₃ nanowires were tightly covered and anchored by graphene sheets, forming a layered structure. Subsequently, CGCs were exploited as electrode materials for lithium ion batteries (LIBs). The reversible formation of Li₂O buffer layer and elastic graphene sheets accommodated the volume change during the charge and discharge processes. CGC containing 37 wt% graphene exhibited a superior electrochemical performance, that is, a remarkable reversible capacity (1265 mA h g(-1) for the first cycle), an outstanding cyclic performance (853 mA h g(-1) after 50 cycles under a current density of 200 mA g(-1)), a high coulombic efficiency, and an excellent rate capability. Clearly, CGCs may stand out as a promising anode material for LIBs.

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عنوان ژورنال:
  • Nanoscale

دوره 6 14  شماره 

صفحات  -

تاریخ انتشار 2014