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

Haibo Tan, Shengping Wang, Du Tao and Zhigao Yang
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Haibo Tan: Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, China
Shengping Wang: Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, China
Du Tao: Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, China
Zhigao Yang: Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, China

Energies, 2013, vol. 6, issue 7, 1-15

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.

Keywords: sulfur/carbon composites; solution evaporation concentration crystallization method; lithium sulfur batteries (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2013
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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