能源化学(英文) ›› 2013, Vol. 22 ›› Issue (2): 341-346.

• Articles • 上一篇    下一篇

Hierarchical nanostructured composite cathode with carbon nanotubes as conductive scaffold for lithium-sulfur batteries

Xiaofei Liu, Qiang Zhang, Jiaqi Huang, Shumao Zhang, Hongjie Peng, Fei Wei   

  1. Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
  • 收稿日期:2012-11-20 修回日期:2013-01-07 出版日期:2013-03-20 发布日期:2013-04-04
  • 通讯作者: Qiang Zhang, Fei Wei
  • 基金资助:
    This work was supported by National Basic Research Program of China (973 Program, 2011CB932602), Research Fund for the Doctoral Program of Higher Education of China (20120002120047), and China Postdoctoral Science Foundation (2012M520293).

Hierarchical nanostructured composite cathode with carbon nanotubes as conductive scaffold for lithium-sulfur batteries

Xiaofei Liu, Qiang Zhang, Jiaqi Huang, Shumao Zhang, Hongjie Peng, Fei Wei   

  1. Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
  • Received:2012-11-20 Revised:2013-01-07 Online:2013-03-20 Published:2013-04-04
  • Supported by:
    This work was supported by National Basic Research Program of China (973 Program, 2011CB932602), Research Fund for the Doctoral Program of Higher Education of China (20120002120047), and China Postdoctoral Science Foundation (2012M520293).

摘要: Carbon nanotubes (CNTs) are excellent scaffolds for advanced electrode materials, resulting from their intrinsic sp2 carbon hybridization, interconnected electron pathway, large aspect ratio, hierarchical porous structures, and low cost at a large-scale production. How to make full utilization of the mass produced CNTs as building blocks for nanocomposite electrodes is not well understood yet. Herein, a composite cathode containing commercial agglomerated multi-walled CNTs and S for Li-S battery was fabricated by a facile melt-diffusion strategy. The hierarchical CNT@S coaxial nanocables exhibited a discharging capacity of 1020 and 740 mAh穏-1 at 0.5 and 2.0 C, respectively. A rapid capacity decay of 0.7% per cycle at the initial 10 cycles and a slow decay rate of 0.14% per cycle for the later 140 cycles were detected. Such hierarchical agglomerated CNT@S cathodes show advantages in easy fabrication, environmentally benign, low cost, excellent scalability, and good Li ion storage performance, which are extraordinary composites for high performance Li-S battery.

关键词: carbon nanotubes, lithium sulfur battery, hierarchical nanocomposite, cathode, energy storage

Abstract: Carbon nanotubes (CNTs) are excellent scaffolds for advanced electrode materials, resulting from their intrinsic sp2 carbon hybridization, interconnected electron pathway, large aspect ratio, hierarchical porous structures, and low cost at a large-scale production. How to make full utilization of the mass produced CNTs as building blocks for nanocomposite electrodes is not well understood yet. Herein, a composite cathode containing commercial agglomerated multi-walled CNTs and S for Li-S battery was fabricated by a facile melt-diffusion strategy. The hierarchical CNT@S coaxial nanocables exhibited a discharging capacity of 1020 and 740 mAh穏-1 at 0.5 and 2.0 C, respectively. A rapid capacity decay of 0.7% per cycle at the initial 10 cycles and a slow decay rate of 0.14% per cycle for the later 140 cycles were detected. Such hierarchical agglomerated CNT@S cathodes show advantages in easy fabrication, environmentally benign, low cost, excellent scalability, and good Li ion storage performance, which are extraordinary composites for high performance Li-S battery.

Key words: carbon nanotubes, lithium sulfur battery, hierarchical nanocomposite, cathode, energy storage