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