蠕虫状介孔SnO_2的合成与电化学性能研究

Synthesis and Electrochemical Property of Worm-hole Like Mesoporous SnO_2

以十六烷基三甲基溴化铵(CTAB)为软模板,采用水热法制备蠕虫状介孔金红石型SnO2,采用X射线衍射仪、透射电子显微镜、拉曼光谱、氮气吸附-脱附法对合成产物进行表征。结果表明:合成产物具有介孔结构,平均孔径为5.8nm。以介孔SnO2作为锂离子电池负极材料进行电化学性能测试,第1次放、充电比容量分别为1 011.8mAh/g和529.18mAh/g,在恒电流下进行20次充放电后,其放电比容量为326.73mAh/g。

Worm-hole like mesoporous SnO2 was synthesized via a hydrothermal route assisting by the soft template of CTAB.The products were characterized by X-ray diffraction（XRD）,transmission electron microscopy（TEM）,Raman spectrum and nitrogen absorption-desorption.The results showed that the products exhibited mesoporous structure with an average pore diameter of 5.8 nm.Electrochemical performance was carried out on the Li ion battery using mesoporous SnO2as anode material.The first discharge and charge capacities were 1 011.8 mAh/g and 529.18 mAh/g respectively,and the discharge capacity was 326.73 mAh/g after 20 cycles.