Acta Phys. -Chim. Sin. ›› 2013, Vol. 29 ›› Issue (03): 546-552.doi: 10.3866/PKU.WHXB201301081

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Preparation and Electrochemical Performance of Carbon Nanotubes/ Graphene Oxide/Sulfur Complex Cathode Material

XU Gui-Yin, DING Bing, NIE Ping, LUO Hong-Jun, ZHANG Xiao-Gang   

  1. College of Material Science & Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P.R. China
  • Received:2012-10-08 Revised:2013-01-07 Published:2013-02-25
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21173120), Natural Science Foundation of Jiangsu Province, China (BK2011030), and Funding of Graduate Innovation Center in Nanjing University of Aeronautics and Astronautics, China (kfjj120209).

Abstract:

Three-dimensional (3D) hierarchical CNTs/GO/S ternary composites were prepared by solution-based reaction-deposition, using graphene oxide (GO) and carbon nanotubes (CNTs) as precursors. Scanning electron microscopy (SEM) and transmission electron microscope (TEM) indicated a uniform S coating on CNTs/GO which arose because of the large GO specific surface area. CNTs interspersed between the GO layers to form a 3D porous structure. Constant current charge-discharge tests showed that CNTs/GO/S composites had a high discharge capacity and excellent cycling stability, and delivered a high initial discharge capacity of 904 mAh·g-1 at 1C rate. After 50 cycles at the same rate, the reversible capacity remained at 578 mAh·g-1.

Key words: Lithium-sulfur battery, Graphene oxide, Carbon nanotube, Composite, Cycling performance

MSC2000: 

  • O646