Issue 4, 2015

Vulcanization accelerator enabled sulfurized carbon materials for high capacity and high stability of lithium–sulfur batteries

Abstract

Sulfurized carbon is a promising candidate for cathode materials in practical lithium–sulfur batteries due to its high and stable capacity retention, extremely low self-discharge, and excellent safety. The main disadvantage is the relatively low sulfur content in sulfurized carbon materials. Borrowing the idea from rubber crosslinking chemistry, here we report the use of a vulcanization accelerator in carbon sulfurization. Vulcanization accelerators significantly improve sulfur content by ∼8 wt%, which results in a remarkable increase in the discharge capacity of corresponding Li–S batteries by ∼120 mA h g−1 while maintaining the outstanding cycling stability and low self-discharge. The effectiveness of this approach and the wide variety of vulcanization accelerator chemistry will pave the way for sulfurized carbon materials towards practical applications in Li–S batteries.

Graphical abstract: Vulcanization accelerator enabled sulfurized carbon materials for high capacity and high stability of lithium–sulfur batteries

Supplementary files

Article information

Article type
Communication
Submitted
04 nov 2014
Accepted
25 nov 2014
First published
11 dec 2014

J. Mater. Chem. A, 2015,3, 1392-1395

Author version available

Vulcanization accelerator enabled sulfurized carbon materials for high capacity and high stability of lithium–sulfur batteries

H. Chen, C. Wang, C. Hu, J. Zhang, S. Gao, W. Lu and L. Chen, J. Mater. Chem. A, 2015, 3, 1392 DOI: 10.1039/C4TA05938G

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