The “shuttle effect” of polysulfides is a serious issue, resulting in a decrease in the life-cycle of lithium-sulfur (Li-S) batteries. To inhibit the shuttle effect, a combination of graphene oxide and silica has been adopted in this work. Here, two different ratios of sulfur/silicon dioxide/partially reduced graphene oxide (S/SiO₂/prGO - 70:20:10 and 70:10:20) composite materials were prepared via a melt diffusion method and were used as a cathode for a Li-S battery. The wrinkled sheets of partially reduced graphene oxide not only provide a conductive network for electron transport, but also ease the volume changes of active material during cycling. The 20 wt% of prGO present in the S/SiO₂/prGO cathode delivers initial discharge capacity of 783 mAh g⁻¹ at 0.2 C and remains at 491 mAh g⁻¹ over 300 cycles, with low capacity decay rate of 0.12% per cycle. The better electrochemical performance indicates that the electrode containing 20 wt% of prGO with silica effectively suppresses the “shuttle effect” of polysulfide dissolution.

多硫化物的“穿梭效应”是一个严重的问题，导致锂硫（Li-S）电池寿命缩短。为了抑制穿梭效应，在这项工作中采用了氧化石墨烯和二氧化硅的组合。在此，通过熔融扩散法制备了两种不同比例的硫/二氧化硅/部分还原的氧化石墨烯（S / SiO ₂ / prGO-70:20:10和70:10:20）复合材料，并将其用作阴极用于锂电池。部分还原的氧化石墨烯的褶皱片材不仅为电子传输提供了导电网络，而且还减轻了循环过程中活性物质的体积变化。存在于S / SiO ₂ / prGO阴极中的20 wt％prGO的初始放电容量为783 mAh g ^-1在0.2 C的温度下，在300个循环中保持在491 mAh g ^-1，每个循环的低容量衰减率为0.12％。更好的电化学性能表明，含有20 wt％的prGO和二氧化硅的电极可有效抑制多硫化物溶解的“穿梭效应”。