Issue 33, 2017

Poly(3,4-ethylenedioxythiophene)-coated sulfur for flexible and binder-free cathodes of lithium–sulfur batteries

Abstract

Flexible energy storage devices are becoming increasingly important for next-generation flexible electronic devices. However, the low energy density of conventional lithium-ion batteries cannot fulfill their high capacity requirement. Therefore, lithium–sulfur (Li–S) batteries with high theoretical capacity and energy density have attracted attention as new-generation energy storage devices. In this work, we designed a freestanding poly(3,4-ethylenedioxythiophene) (PEDOT)-coated diamond-shaped sulfur (D-sulfur)/single-walled carbon nanotube (SWCNT) composite cathode. The conductive PEDOT and SWCNTs effectively confined the dissolution of lithium polysulfides, and a flexible network was successfully fabricated. The D-sulfur/SWCNT composite cathode exhibited a high capacity and stable cycling performance. The initial discharge capacity reached 1520 mA h g−1 at 0.1C, and the capacity retention was 76% after 250 cycles at 0.5C. Furthermore, the D-sulfur/SWCNT was used as a flexible cathode to fabricate a prototype of a flexible Li–S battery, which shows its potential application in flexible integrated systems.

Graphical abstract: Poly(3,4-ethylenedioxythiophene)-coated sulfur for flexible and binder-free cathodes of lithium–sulfur batteries

Supplementary files

Article information

Article type
Paper
Submitted
17 Apr 2017
Accepted
22 Jul 2017
First published
24 Jul 2017

J. Mater. Chem. A, 2017,5, 17647-17652

Poly(3,4-ethylenedioxythiophene)-coated sulfur for flexible and binder-free cathodes of lithium–sulfur batteries

M. Zhang, Q. Meng, A. Ahmad, L. Mao, W. Yan and Z. Wei, J. Mater. Chem. A, 2017, 5, 17647 DOI: 10.1039/C7TA03314A

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