Issue 43, 2014

Improving the performance of PEDOT-PSS coated sulfur@activated porous graphene composite cathodes for lithium–sulfur batteries

Abstract

A novel PEDOT-PSS coated sulfur@activated porous graphene composite (PEDOT/S@aPG) is prepared by the impregnation of sulfur with aPG and encapsulation with PEDOT-PSS as the cathode material for lithium–sulfur batteries. The abundant nanopores and large surface area of aPG can provide an intimate contact and strong interaction with S species. Furthermore, the conductive PEDOT-PSS layer can facilitate the charge transportation and prevent the dissolution of polysulfides. As a result, the as-prepared PEDOT/S@aPG composite cathode with a sulfur content of about 60.1% shows a higher specific discharge capacity (1198 mA h g−1 at 0.1 C) in the first cycle and good cycling stability, retaining a reversible capacity of 845 mA h g−1 after 200 cycles. Moreover, the PEDOT/S@aPG cathode also exhibits excellent rate capability, showing a high reversible capacity of 718 mA h g−1 at 2 C.

Graphical abstract: Improving the performance of PEDOT-PSS coated sulfur@activated porous graphene composite cathodes for lithium–sulfur batteries

Supplementary files

Article information

Article type
Paper
Submitted
01 Jul 2014
Accepted
04 Sep 2014
First published
04 Sep 2014

J. Mater. Chem. A, 2014,2, 18345-18352

Author version available

Improving the performance of PEDOT-PSS coated sulfur@activated porous graphene composite cathodes for lithium–sulfur batteries

H. Li, M. Sun, T. Zhang, Y. Fang and G. Wang, J. Mater. Chem. A, 2014, 2, 18345 DOI: 10.1039/C4TA03366C

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