Jump to main content
Jump to site search

Issue 2, 2014
Previous Article Next Article

Sulfur-infiltrated porous carbon microspheres with controllable multi-modal pore size distribution for high energy lithium–sulfur batteries

Author affiliations

Abstract

Sulfur has received increasing attention as a cathode material for lithium–sulfur (Li–S) batteries due to its high theoretical specific capacity. However, the commercialization of Li–S batteries is limited by the challenges of poor electrical conductivity of sulfur, dissolution of the polysulfide intermediates into the electrolyte, and volume expansion of sulfur during cycling. Herein, we report the fabrication of novel-structured porous carbon microspheres with a controllable multi-modal pore size distribution, i.e., a combination of interconnected micropores, mesopores and macropores. Cathodes made of sulfur infiltrated in such a hierarchical carbon framework provide several advantages: (1) a continuous and high surface area carbon network for enhanced electrical conductivity and high sulfur loading; (2) macropores and large mesopores bridged by small mesopores to provide good electrolyte accessibility and fast Li ion transport and to accommodate volume expansion of sulfur; and (3) small mesopores and micropores to improve carbon/sulfur interaction and to help trap polysulfides. An initial discharge capacity at 1278 mA h g−1 and capacity retention at 70.7% (904 mA h g−1) after 100 cycles at a high rate (1 C) were achieved. The material fabrication process is relatively simple and easily scalable.

Graphical abstract: Sulfur-infiltrated porous carbon microspheres with controllable multi-modal pore size distribution for high energy lithium–sulfur batteries

Back to tab navigation

Supplementary files

Publication details

The article was received on 25 Aug 2013, accepted on 27 Oct 2013 and first published on 30 Oct 2013


Article type: Paper
DOI: 10.1039/C3NR04532C
Citation: Nanoscale, 2014,6, 882-888
  •   Request permissions

    Sulfur-infiltrated porous carbon microspheres with controllable multi-modal pore size distribution for high energy lithium–sulfur batteries

    C. Zhao, L. Liu, H. Zhao, A. Krall, Z. Wen, J. Chen, P. Hurley, J. Jiang and Y. Li, Nanoscale, 2014, 6, 882
    DOI: 10.1039/C3NR04532C

Search articles by author

Spotlight

Advertisements