期刊
CHEMISTRY-AN ASIAN JOURNAL
卷 7, 期 7, 页码 1637-1643出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.201200004
关键词
electrochemistry; energy conversion; graphene; lithium; sulfur
资金
- Australian Research Council (ARC) [DP1093855]
- National Research Foundation of Korea through WCU [R32-2008-000-20093-0]
- National Research Foundation of Korea [R32-2012-000-20093-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Sulfur/graphene nanocomposite material has been prepared by incorporating sulfur into the graphene frameworks through a melting process. Field-emission scanning electron microscope analysis shows a homogeneous distribution of sulfur in the graphene nanosheet matrix. The sulfur/graphene nanocomposite exhibits a super-high lithium-storage capacity of 1580 mAh?g-1 and a satisfactory cycling performance in lithiumsulfur cells. The enhancement of the reversible capacity and cycle life could be attributed to the flexible graphene nanosheet matrix, which acts as a conducting medium and a physical buffer to cushion the volume change of sulfur during the lithiation and delithiation process. Graphene-based nanocomposites can significantly improve the electrochemical performance of lithiumsulfur batteries.
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