Electrodeposition of Ni5Sb2 nanowires array and its application as a high-performance anode material for lithium ion batteries

Single crystal Ni5Sb2 nanowires array is synthesized by direct-current electrodeposition technique. The initial specific discharge and charge capacity of the as-produced Ni5Sb2 nanowires array electrode as an anode material for lithium–ion batteries presents 290.6 mAh g−1 and 225 mAh g−1 respectively at a current density of 60 mA g−1. Its charge–discharge curve displays an excellent platform. Initial coulombic efficiency of the electrode is above 77%, and it becomes greater than 95% after several charge/discharge cycles.

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► We prepare single crystal Ni5Sb2 nanowire array with highly preferential orientation using DC electrodeposition technique.
► The initial discharge and charge capacity of Ni5Sb2 nanowires array electrode are 290 mAh g−1 and 225 mAh g−1 respectively.
► The initial coulombic efficiency of the electrode is about 73% even greater than 95% after several charge/discharge cycles.
► The unique array structure of the Ni5Sb2 results in the superior performance as an anode material for lithium–ion batterie.