▎ 摘　　要

Lithium- sulfur ( Li- S) batteries have drawn extensive attentions due to their high energy density, environmental friendliness and low cost. In this study, three- dimensional ( 3D) graphene/ S hybrid ( G/ S) is prepared by a one- pot hydrothermal method together with redox reaction between S- based compound and graphene oxide ( GO). G/ S has a three dimensional porous structure, where graphene is interconnected with each other forming a 3D conductive network. It demonstrates that the pore structure of G/ S can be well controlled by optimizing the drying method of the 3D graphene- based materials. Freeze drying and evaporation-induced drying can induce different density and pore structure of G/ S. Electrochemical tests illustrate that the resulting hybrid can deliver a specific capacity of 891 mAh center dot g(-1) and 575 mAh center dot g(-1) for the 1st and 100th cycle at a current density of 500 mAh center dot g(-1).