▎ 摘　　要

Iron oxides and iron sulfides have attracted significant research concerns for lithium-ion batteries (LIBs) due to their higher theoretical capacity than the commercial electrode. However, they both suffer from large volume expansion during cycling and poor electrical conductivity. Iron sulfides have another problem of the dissolution of polysulfides into organic electrolytes. This work reports a sulfur-doped graphene aerogel (GA) supported FeS2@carbon composite with better lithium ion storage properties than its intermediate precursors (GA supported Fe-Fe3O4@C and Fe2O3). It exhibits a high reversible capacity of similar to 1000 mA h g(-1) at 0.1 C during cycling with good rate capability. These enhanced electrochemical properties are mainly attributed to the synergetic effect of the GA support, carbon coating and sulfur doping.