▎ 摘　　要

Fe3O4/Cu@ graphene (Fe3O4/Cu@G) nanocomposite is prepared through a facile fabrication of Fe3O4/Cu precursor by dealloying FeCuAl alloy followed by the reduction of coassembled aggregates of Fe3O4/Cu and graphene oxide. The obtained Fe3O4 octahedra are well enwrapped in nanoporous Cu network and graphene nanosheets. Benefitting from the bimodal conductive network of Cu and graphene, the Fe3O4/Cu@G composite exhibits much higher specific capacity and dramatically enhanced cycling stability compared with the pure Fe3O4 octahedra, Fe3O4/Cu, and Fe3O4@G composite. Moreover, the Fe3O4/Cu@G electrode shows satisfactory cycling reversibility even at a current rate up to 2000 mA g(-1) for 800 cycles. Owing to the superiorities of high electrochemical performances and easy preparation, the Fe3O4/Cu@G composite shows encouraging application potential to be an advanced anode material for lithium storage. (C) 2017 Elsevier B.V. All rights reserved.