▎ 摘　　要

Hierarchical urchin-like Fe3O4 porous particles with 3D graphene modification (U-Fe3O4@RGO) are synthesized via cationic surfactant induced self-assembly of gamma-FeOOH particles and graphene oxide (GO) sheets, followed by a calcination treatment. Fe3O4 porous particles are tightly encapsulated by 3D graphene frameworks, which greatly improves the overall electrical conductivity and structural stability of the hybrids. With the help of synergistic effects between U-Fe3O4 and graphene frameworks, UFe3O4@ RGO anode demonstrates high reversible capacity, excellent cycling stability (2292 mA h g(-1) specific capacity after 500 cycles at 0.5 A g(-1)) and outstanding rate capability (439 mA h g(-1) specific capacity at 10 A g(-1)). (C) 2017 Elsevier B.V. All rights reserved.