碳纳米管-锡复合电极材料的制备及性能研究  

Preparation and performance of Sn-CNTs composite electrode

作　　者：彭美玲[1] 雷维新[1] 潘勇[1] 马增胜[1] 成娟娟[1] 

机构地区：[1]湘潭大学材料科学与工程学院低维材料及其应用技术教育部重点实验室,湖南湘潭411105

出　　处：《电源技术》2016年第2期259-262,共4页Chinese Journal of Power Sources

基　　金：国家"863"项目(2013AA031001);国家自然科学基金项目(11372267)

摘　　要：为了改善锂离子电池锡负极的循环性能,将碳纳米管与锡负极复合,以铜片为基底,采用复合电沉积的方式制备了含有不同直径碳纳米管的Sn-CNTs复合电极,并对其表面形貌,成分与结构分别进行了扫描电子显微镜法（SEM）、X射线衍射光谱法（XRD）、能量散射光谱（EDS）分析。最后,组装模拟电池并测试其电化学性能。结果表明：制备的电极表面不规则,可明显观察到CNTs与Sn颗粒,且当CNTs直径为10~20 nm时,其在镀层内含量最高,制备的Sn-CNTs复合电极循环性能最佳,经过50次充放电循环后,其比容量仍能达到420 m Ah/g。To improve the cycle performance of tin anode used by lithium-ion battery, carbon nanotubes were composited with tin anode in this article. on the base of copper collector, Sn-CNTs composite electrodes were prepared by using carbon nanotubes of different diameters by the method of composite electrodeposition. The surface morphology, structure and composition of the sample were investigated by SEM, XRD, EDS. The last,simulated battery was assembled, and its electrochemical performance was tested. The results show that the electrode has irregular surface, CNTs and Sn particles can be clearly observed. And when the diameter of CNTs was 10~20 nm, the content of the CNTs was the highest in coating of the three sample, the Sn-CNTs composite electrode had the best cycle performance,its capacity could still keep 420 m Ah/g after 50 cycles.

关 键 词：锂离子电池 锡负极 碳纳米管 复合电沉积 

分 类 号：TM912[电气工程—电力电子与电力传动]