Graphene/Sulfur Nanocomposite for High Performance Lithium-Sulfur Batteries

Abstract:

The graphene/sulfur nanocomposite has been synthesized by heating a mixture of graphene sheets and elemental sulfur. The morphology, structure and electrochemical performance of graphene/sulfur nanocomposite as cathode material for lithium-sulfur batteries were systematically investigated by field-emission scanning electron microscope, X-ray diffraction and a variety of electrochemical testing techniques. The graphene/sulfur nanocomposite cathodes display a high reversible capacity of 800-1200 mAh g^-1, and stable cycling for more than 100 deep cycles at 0.1 C. The graphene sheets have good conductivity and an extremely high surface area, and provide a robust electron transport network. The graphene network also accommodates the volume change of the electrode during the Li-S electrochemical reaction.

• Periodical: Advanced Materials Research (Volume 936)
• Pages: 369-373
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.936.369
• Online since: June 2014
• Authors: Shao Wu Ma*, Dong Lin Zhao, Ning Na Yao, Li Xu
• Keywords: Graphene, Lithium-Sulfur Batteries, Nanocomposite, Sulfur

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