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Energies 2013, 6(7), 3466-3480; doi:10.3390/en6073466

Acetylene Black/Sulfur Composites Synthesized by a Solution Evaporation Concentration Crystallization Method and Their Electrochemical Properties for Li/S Batteries

Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, China
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Received: 8 May 2013 / Revised: 20 June 2013 / Accepted: 9 July 2013 / Published: 15 July 2013
(This article belongs to the Special Issue Li-ion Batteries and Energy Storage Devices)
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Abstract

A novel technique to prepare carbon/sulfur composites as cathode materials for Li/S batteries is proposed, which we call the ‘solution evaporation concentration crystallization’ method. Three composites with different S loadings were prepared, subject to two different solvent evaporation rates from acetylene black (AB)/sulfur in carbon disulfide solutions. X-ray diffraction, environmental scanning electron microscopy, transmission electron microscopy, and Brunauer-Emmett-Teller measurements all show that the porous AB structure is well-filled with S. Composites prepared at a lower solvent evaporation rate with 50 wt % S content, had good electrochemical properties, with 1609.67 mAh g−1 after 100 cycles. Composites with better dispersibility at a low solvent evaporation rate can effectively prevent polysulfide from dissolving in the electrolyte, and serve to stabilize the structure of the S cathode during the charge-discharge process. View Full-Text
Keywords: sulfur/carbon composites; solution evaporation concentration crystallization method; lithium sulfur batteries sulfur/carbon composites; solution evaporation concentration crystallization method; lithium sulfur batteries
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Tan, H.; Wang, S.; Tao, D.; Yang, Z. Acetylene Black/Sulfur Composites Synthesized by a Solution Evaporation Concentration Crystallization Method and Their Electrochemical Properties for Li/S Batteries. Energies 2013, 6, 3466-3480.

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