Issue 42, 2013

A metastable β-sulfur phase stabilized at room temperature during cycling of high efficiency carbon fibre–sulfur composites for Li–S batteries

Abstract

Due to the insulating behavior of sulfur particles, the development of a suitable conductive matrix becomes a real challenge. Here, we present new composites obtained by mixing sulfur with carbon fibres. These composites possess a specific charge higher than 1200 mA h g−1 of sulfur, and exhibit hardly any fading during cycling. We performed for the first time high resolution in situ X-ray diffraction to understand the role of the composite template. Surprisingly after 1 cycle the beta-sulfur phase was formed, stable normally only above 96 °C. A post-mortem analysis was also performed to show the impact of cycling as well as the storage of the powder.

Graphical abstract: A metastable β-sulfur phase stabilized at room temperature during cycling of high efficiency carbon fibre–sulfur composites for Li–S batteries

Article information

Article type
Paper
Submitted
05 Aug 2013
Accepted
30 Aug 2013
First published
30 Aug 2013

J. Mater. Chem. A, 2013,1, 13089-13092

A metastable β-sulfur phase stabilized at room temperature during cycling of high efficiency carbon fibre–sulfur composites for Li–S batteries

C. Villevieille and P. Novák, J. Mater. Chem. A, 2013, 1, 13089 DOI: 10.1039/C3TA13072J

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