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Issue 1, 2017
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Carbon onion–sulfur hybrid cathodes for lithium–sulfur batteries

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Abstract

In this study, we explore carbon onions (diameter below 10 nm), for the first time, as a substrate material for lithium sulfur cathodes. We introduce several scalable synthesis routes to fabricate carbon onion–sulfur hybrids by adopting in situ and melt diffusion strategies with sulfur fractions up to 68 mass%. The conducting skeleton of agglomerated carbon onions proved to be responsible for keeping active sulfur always in close vicinity to the conducting matrix. Therefore, the hybrids are found to be efficient cathodes for Li–S batteries, yielding 97–98% Coulombic efficiency over 150 cycles with a slow fading of the specific capacity (ca. 660 mA h g−1 after 150 cycles) in long term cycle test and rate capability experiments.

Graphical abstract: Carbon onion–sulfur hybrid cathodes for lithium–sulfur batteries

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Supplementary files

Article information


Submitted
02 Nov 2016
Accepted
03 Jan 2017
First published
03 Jan 2017

This article is Open Access

Sustainable Energy Fuels, 2017,1, 84-94
Article type
Paper

Carbon onion–sulfur hybrid cathodes for lithium–sulfur batteries

S. Choudhury, M. Zeiger, P. Massuti-Ballester, S. Fleischmann, P. Formanek, L. Borchardt and V. Presser, Sustainable Energy Fuels, 2017, 1, 84
DOI: 10.1039/C6SE00034G

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