Centre for Clean Energy Technology, School of Chemistry and Forensic Science, University of Technology Sydney, Sydney, NSW 2007, Australia.
Chem Asian J. 2012 Jun;7(7):1637-43. doi: 10.1002/asia.201200004. Epub 2012 Mar 27.
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 mA h g(-1) and a satisfactory cycling performance in lithium-sulfur 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 lithium-sulfur batteries.
硫/石墨烯纳米复合材料是通过熔融过程将硫掺入石墨烯骨架中制备的。场发射扫描电子显微镜分析表明，硫在石墨烯纳米片基体中均匀分布。硫/石墨烯纳米复合材料在锂硫电池中表现出超高的储锂容量 1580 mA h g(-1)和令人满意的循环性能。可逆容量和循环寿命的提高归因于柔性石墨烯纳米片基体，它充当导电介质和物理缓冲剂，以缓冲在锂化和脱锂过程中硫的体积变化。基于石墨烯的纳米复合材料可以显著提高锂硫电池的电化学性能。
