In this work,we report the synthesis of ZnO ultrafine-rods with aspect ratio of about10via hydrothermal method.The as-prepared rod-like ZnO are characterized by X-ray diffraction(XRD),scanning electron mi-croscopy(SEM),transmission electron microscopy(TEM),and selected area electron diffraction(SAED).And the electrochemical performance of the ZnO material for Li-ion insertion and extraction is also investigated.It is found that the initial discharge capacity of1277mAh · g -1 and the high reversible capacity of766mAh · g -1 with low Li-ion insertion potential are obtained although the cyclic stability is relatively poor.The ZnO electrode after charging is characterized by X-ray diffraction,and only metallic Zn peaks with rod-like morphology are detected.The CV measurements prove the serial formation of Li-Zn alloys during discharging and charging process.
