作　　者： (李叶华）; (吴贤文）; (陈上）; (戴春辉）; (于小林）; (王素亮）; (梁琦颖）; (赵深勇）;

机构地区： 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

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： 水热法 锂离子电池 负极材料