MoO_3的水热法制备、表征及储锂性能  

Hydrothermal Preparation,Characterization and Its Lithium Storage Performance of MoO_3

作　　者：李叶华[1] 吴贤文[1] 陈上[1] 戴春辉[1] 于小林[1] 王素亮 梁琦颖 赵深勇 

机构地区：[1]吉首大学化学化工学院,吉首416000

出　　处：《人工晶体学报》2017年第8期1619-1624,共6页Journal of Synthetic Crystals

基　　金：湖南省教育厅优秀青年项目(15B190);湖南省研究生科研创新项目(CX2017B710);吉首大学研究生科研创新项目(Jdy16015)

摘　　要：以钼酸钠和水杨酸钠为原料,通过水热法合成了Mo O_3。借助X射线衍射(XRD)、扫描电子显微镜(SEM)等对材料的结构和形貌进行表征,采用电化学工作站和充放电仪对电池的电化学性能进行测试。研究结果表明:在180℃下水热反应12 h制备得到六方相MoO_3(h-Mo O_3)纳米块相较于在180℃下水热反应24 h制备得到正交相Mo O_3(α-Mo O_3)纳米片的电化学性能更佳。当h-MoO_3作为锂离子电池负极电极材料时,其首次放电比容量为2068.1 m Ah/g。在电流密度为50 m A/g下循环50次后,其放电比容量仍然高达946.4 m Ah/g,这归因于h-MoO_3较小的电化学转移阻抗。MoO3 was synthesized by hydrothermal method using sodium molybdate and sodium salicylate as raw material. The structure and morphology of the materials were characterized by X-ray diffraction（ XRD）,scanning electron microscopy（ SEM） and the electrochemical performances of MoO3 were conducted on an electrochemical workstation and a battery tester. The results show that the electrochemical properties of hexagonal MoO3（ h-MoO3） nanobocks prepared by hydrothermal treatment at 180 ℃ for 12 h are much better than the crossed MoO3（ α-MoO3） nanosheets synthesized by hydrothermal treatment at 180 ℃ for 24 h. When it is applied as anodes for lithium ion battery,the initial discharge capacity of h-MoO3 is 2068. 1 m Ah/g.After 50 cycles,its discharge capacity is 946. 4 m Ah/g at a current density of 50 m A/g. The outsanding electrochemical performance is attributed to the smaller electrochemical transfer impedance.

关 键 词：MOO3 水热法 锂离子电池 负极材料 

分 类 号：TM912.9[电气工程—电力电子与电力传动]