物理化学学报 >> 2013, Vol. 29 >> Issue (03): 546-552.doi: 10.3866/PKU.WHXB201301081

电化学和新能源 上一篇    下一篇

碳纳米管/氧化石墨烯/硫复合正极材料的制备及其电化学性能

徐桂银, 丁兵, 聂平, 骆宏钧, 张校刚   

  1. 南京航空航天大学材料科学与技术学院, 南京 210016
  • 收稿日期:2012-10-08 修回日期:2013-01-07 发布日期:2013-02-25
  • 通讯作者: 张校刚 E-mail:azhangxg@163.com
  • 基金资助:

    国家自然科学基金(21173120); 江苏省自然科学基金重点专项(BK2011030)及南京航空航天大学研究生创新基地(实验室)开放基金(kfjj120209)资助

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).

摘要:

以碳纳米管和氧化石墨烯(CNTs/GO)为主体材料, 通过化学还原法制备了CNTs/GO 负载硫的复合正极材料CNTs/GO/S. 扫描电子显微镜(SEM)及透射电子显微镜(TEM)测试表明, CNTs 均匀插层在GO片间, 从而形成三维多孔结构, 有利于电解液的浸润; 活性物质硫均匀地负载在CNTs/GO 表面. 电化学测试表明,CNTs/GO/S复合材料具有高的比容量和良好的循环稳定性: 在1C倍率电流密度下, 复合材料首次放电比容量高达904 mAh·g-1, 经过50圈循环之后, 复合材料的比容量仍保持在578 mAh·g-1.

关键词: 锂-硫电池, 氧化石墨烯, 碳纳米管, 复合材料, 循环性能

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