Jump to main content
Jump to site search


A spheres-in-tube carbonaceous nanostructure for high-capacity and high-rate lithium–sulfur batteries

Author affiliations

Abstract

The uses of sulfur, which has a high theoretical specific capacity of 1675 mA h g−1, as a commercial cathode for lithium batteries have been substantially hindered by the insulating nature of sulfur and the dissolution of intermediate polysulfides (Li2Sx, 4 < x ≤ 8) into the electrolyte. In this work, a spheres-in-tube carbonaceous nanoarchitecture has been successfully engineered as an effective sulfur host, by encapsulating heteroatom-doped hollow carbon spheres into an intact carbonaceous nanotube (I-HCSs@CT). The structural features including hierarchical porosity and the intact nature of the CT wall and HCS framework have cooperatively endowed I-HCSs@CT with outstanding capability of host loading, good electrical conductivity, a high utilization rate and excellent stability of sulfur. As a result, our sulfur/carbon composites deliver a large discharge capacity of 1426 mA h g−1 at 0.1C with a high sulfur loading of 72.1 wt%. The obtained electrode demonstrates superior high-rate cycling performance, with a high specific capacity of 746 mA h g−1 at 0.5C being retained after 500 cycles.

Graphical abstract: A spheres-in-tube carbonaceous nanostructure for high-capacity and high-rate lithium–sulfur batteries

Back to tab navigation

Supplementary files

Publication details

The article was received on 30 May 2018, accepted on 08 Jul 2018 and first published on 10 Jul 2018


Article type: Paper
DOI: 10.1039/C8TA05041D
Citation: J. Mater. Chem. A, 2018, Advance Article
  •   Request permissions

    A spheres-in-tube carbonaceous nanostructure for high-capacity and high-rate lithium–sulfur batteries

    Y. Ge, Z. Chen, S. Ye, Z. Zhu, Y. Tu and X. Yang, J. Mater. Chem. A, 2018, Advance Article , DOI: 10.1039/C8TA05041D

Search articles by author

Spotlight

Advertisements