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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Ultrasonic-electrodeposited Sn-CNTs composite used as
 anode material for lithium ion battery
LI Chang-ming(李昌明)1, 2, 3, ZHANG Ren-yuan(张仁元)2, LI Wei-shan(李伟善)1
ZHAO Ling-zhi(赵灵智)1, 2, HU She-jun(胡社军)1, 3, RAO Mu-min(

1. School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China;
2. Faculty of Material and Energy, Guangdong University of Technology, Guangzhou 510090, China;
3. Department of Mathematics and Physics, Wuyi University, Jiangmen 529020, China

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.

 

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

ISSN 1672-7029
CN 43-1423/U

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