Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance upgrade on Thursday 4th of May 2017 from 8.00am to 9.00am (BST).

During this time our websites will be offline temporarily. If you have any questions please use the feedback button on this page. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 12, 2017
Previous Article Next Article

Enhanced Li–S battery performance based on solution-impregnation-assisted sulfur/mesoporous carbon cathodes and a carbon-coated separator

Author affiliations

Abstract

The widespread use of lithium–sulfur (Li–S) batteries is still hindered by the low electrochemical activity of sulfur-species, and a short cycle life owing to anode instability coupled with polysulfide shuttle effects. As a first measure to counteract these issues, a new and simple sulfur-loading method consisting of solution impregnation and subsequent melt-diffusion (IM) is demonstrated and compared to the conventional method of physical mixing followed by melt-diffusion (PM). Using the IM method, sulfur is well encapsulated and highly dispersed in conducting mesoporous carbons (MCs) that possess an ideal pore diameter (around 10 nm) and a large pore volume (∼2.8 cm3 g−1). S/MC cathodes prepared by the IM method deliver much higher capacities, better rate responses and cycling stabilities up to 300 cycles (the fading rate was as low as −0.037% per cycle) with less concerns in lithium polysulfide (LPS) shuttling and impedance build up than S/MC cathodes prepared by the PM method. The S/MC cathodes prepared by the IM method has a pseudo-optimum sulfur content of 65 wt%, and when coupled with a new type of carbon-coated separator (CCS), a high areal capacity of >2.5 mA h cm−2 is successfully achieved, combined with excellent cycling stability and rate capability.

Graphical abstract: Enhanced Li–S battery performance based on solution-impregnation-assisted sulfur/mesoporous carbon cathodes and a carbon-coated separator

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 07 Feb 2017, accepted on 26 Feb 2017 and first published on 27 Feb 2017


Article type: Paper
DOI: 10.1039/C7TA01161J
Citation: J. Mater. Chem. A, 2017,5, 5750-5760
  •   Request permissions

    Enhanced Li–S battery performance based on solution-impregnation-assisted sulfur/mesoporous carbon cathodes and a carbon-coated separator

    C. Oh, N. Yoon, J. Choi, Y. Choi, S. Ahn and J. K. Lee, J. Mater. Chem. A, 2017, 5, 5750
    DOI: 10.1039/C7TA01161J

Search articles by author