一维棒状ZnO的制备及电化学嵌锂性能研究  

Synthesis and Electrochemical Lithium Insertion of the Rod-like ZnO

作　　者：郑占丰[1] 高学平[1] 潘桂玲[1] 鲍建莉[1] 曲金秋[1] 吴锋[1,2] 宋德瑛[1] 

机构地区：[1]南开大学新能源材料化学研究所 [2]北京理工大学化工与环境学院,北京100081

出　　处：《无机化学学报》2004年第4期488-492,共5页Chinese Journal of Inorganic Chemistry

基　　金：国家重点基础研究发展规划(No.2002CB211800);国家基础研究重大项目前期研究专项(No.2001CCA05000);国家自然科学基金(No.90206043)资助项目。

摘　　要：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.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.

关 键 词：一维棒状氧化锌 制备 电化学嵌锂性能 锂离子电池 负极材料 水热法 

分 类 号：TM911.14[电气工程—电力电子与电力传动]