GO@S/C composite with a multilayered sandwich structure was prepared by a moderate sol-gel method, which was based on porous acetylene black (C) loading sulfur and insertion into multilayered graphene oxide (GO). When evaluated as a cathode for lithium-sulfur batteries (LSBs), it shows an improved capacity of 1433 mAh/g at 0.1 C and 433 mAh/g at 5 C with almost 100% coulombic efficiency for comparison with pure sulfur electrode. It also effectively hinders the expansion of sulfur, the dissolution of polysulfides, and the shuttle effect due to the adsorption and local confinement of polysulfide by porous C and GO.

中文翻译：

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氧化石墨烯包裹的硫/乙炔黑，用于高性能锂硫电池

通过适度的溶胶-凝胶法制备了具有多层夹心结构的GO @ S / C复合材料，该方法基于负载硫的多孔乙炔黑（C）并插入到多层氧化石墨烯（GO）中。当评估为锂硫电池（LSBs）的正极时，与纯硫电极相比，它在0.1 C时的容量提高了1433 mAh / g，在5 C时的容量提高了433 mAh / g，库仑效率几乎为100％。由于多孔C和GO对多硫化物的吸附和局部限制，它还有效地阻止了硫的膨胀，多硫化物的溶解以及穿梭效应。