▎ 摘　　要

A sandwich-structured nanosulfur@polyaniline/graphene (nanoS@PANI/G) composite was synthesized through a facile method: polyaniline is polymerized in-situ on graphene sheets and sulfur nanoparticles are deposited into polyaniline layer simultaneously. Such a hierarchical framework combines multiple advantageous features, including a continuous electrically conducting polyaniline@graphene network binding with sulfur nanoparticles, high flexibility accommodating volume expansion and porous space for adsorbing the polysulfides. The resulting composite delivers a high initial capacity of 1625 mA h g(-1), remaining a reversible capacity of similar to 600 mA h g(-1) after 100 cycles, making it a promising cathode material for rechargeable lithium batteries with high energy density. (C) 2014 Elsevier B.V. All rights reserved.