Ultrasonic-electrodeposited Sn-CNTs composite used as anode material for lithium ion battery

来源期刊：中国有色金属学报(英文版)2007年增刊第1期(Part ⅡB)

论文作者：李昌明 张仁元 李伟善 赵灵智 胡社军 饶睦敏 徐建霞

文章页码：934 - 936

Key words：lithium ion battery; anode materials; electrodeposition; tin; carbon nanotube

Abstract: Tin carbon nanotube (Sn-CNTs) composite was prepared by ultrasonic-electrodepositing tin on the substrate of copper foil in a sulfate bath containing carbon nanotubes (CNTs). The composites were characterized by scanning electron microscopy (SEM), cyclic voltammetry(CV) and charge-discharge cycling test. The results show that Sn-CNTs have a better electrochemical performance than Sn. The capacity of Sn-CNTs is 843 mA·h/g during the first discharge and the efficiency of charge-discharge reaches 85%. After 50 cycles, the capacity of Sn-CNTs keeps at 380 mA·h/g. The CNTs in tin act as a structure supporter and play a role of an elastomer and conductive network, alleviating the electrode dilapidation resulted from volume change during the lithium insertion and deinsertion.

基金信息：the Key Project of Guangdong Province and Guangzhou City, China