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Study on electrochemical performances of sulfur-containing graphene nanosheets electrodes for lithium-sulfur cells
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  • Journal title : Carbon letters
  • Volume 15, Issue 2,  2014, pp.113-116
  • Publisher : Korean Carbon Society
  • DOI : 10.5714/CL.2014.15.2.113
 Title & Authors
Study on electrochemical performances of sulfur-containing graphene nanosheets electrodes for lithium-sulfur cells
Son, Ki-Soo; Kim, Seok;
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 Abstract
Due to their morphology, electrochemical stability, and function as a conducting carbon matrix, graphene nanosheets (GNS) have been studied for their potential roles in improving the performance of sulfur cathodes. In this study, a GNS/sulfur (GNS/S) composite was prepared using the infiltration method with organic solvent. The structure, morphology and crystallinity of the composites were examined using scanning electron microscopy, transmission electron microscopy, and X-ray diffraction. The electrochemical properties were also characterized using cyclic voltammetry (CV). The CV data revealed that the GNS/S composites exhibited enhanced specific-current density and ~10% higher capacity, in comparison with the S-containing, activated-carbon samples. The composite electrode also showed better cycling performance for multiple charge/discharge cycles. The improvement in the capacity and cycling stability of the GNS/S composite electrode is probably related to the fact that the graphene in the composite improves conductivity and that the graphene is well dispersed in the composites.
 Keywords
lithium-sulfur;battery;sulfur;cathode materials;
 Language
English
 Cited by
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