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Issue 10, 2012
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A flexible nanostructured sulphur–carbon nanotube cathode with high rate performance for Li-S batteries

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Abstract

We report the template-directed synthesis of sulphur–carbon nanotubes and their use to form a membrane that is binder-free, highly conductive and flexible. This nanostructured membrane is used as a self-supporting cathode without metal current-collectors for Li-S batteries. The membrane cathode has a high electrical conductivity and renders a long life of sulphur of over 100 charge–discharge cycles. High discharge capacity of sulphur was attained at 712 mA h gsulphur−1 (23 wt% S) and 520 mA h gsulphur−1 (50 wt% S) at a high current density (6 A gsulphur−1). The overall capacity of the flexible cathode correspondingly reaches 163 mA h g−1 (23 wt% S) and 260 mA h g−1 (50 wt% S). These results demonstrate the great potential of this nanostructured flexible membrane as a cathode for Li-S batteries with fast charge–discharge performance and long life.

Graphical abstract: A flexible nanostructured sulphur–carbon nanotube cathode with high rate performance for Li-S batteries

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Article information


Submitted
21 May 2012
Accepted
27 Jul 2012
First published
27 Jul 2012

Energy Environ. Sci., 2012,5, 8901-8906
Article type
Communication

A flexible nanostructured sulphur–carbon nanotube cathode with high rate performance for Li-S batteries

G. Zhou, D. Wang, F. Li, P. Hou, L. Yin, C. Liu, G. Q. (. Lu, I. R. Gentle and H. Cheng, Energy Environ. Sci., 2012, 5, 8901
DOI: 10.1039/C2EE22294A

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