▎ 摘　　要

Suppression of the shuttle effect of polysulfides is crucial to improving the cycling stability and S utility in Li-S batteries. Here, we report an efficient approach to firmly trapping S species by three dimensional (3D) sponge-like graphene cubes (SGCs). The SGCs have a uniform sponge-like structure in size of several microns, which results in a high resistance for the polysulfide diffusion from the central zone of SGCs to the free space in electrolyte. As the cathode in a Li-S battery, the composites of SGCs compounding with 60% elemental sulfur (SGC/0.6S) exhibit a reversible capacity up to 1185 mAh g(-1) at 1 C, superior rate capability (735 mAh g(-1) at 10 C) and an excellent cycling stability (capacity decay of 0.036% per cycle in 500 cycles). The excellent electrochemical performance is ascribed to the 3D large-size sponge-like structure with high conductivity, abundant pore volumes and stable cubic structures. Our results provide a novel SGC/S composite with great potential to be applied in advanced Li-S batteries. (C) 2019 Elsevier Ltd. All rights reserved.