▎ 摘　　要

Fe3O4-graphene nanocomposites were prepared via a simple hydrothermal method. Ultrafine Fe3O4 nanoparticles were evenly anchored on graphene substrates. As anode material for Li-ion batteries (LIB), the nanocomposite showed high initial discharge and charge capacities of 1456 mAhg(-1) and 739.9 mAhg(-1) at high current density of 500 mAg(-1). Additionally, the charge capacity was also retained at 698.3 mAhg(-1) after 200 cycles, thereby indicating excellent cycling stability. The results suggested that the as-prepared Fe3O4-graphene nanocomposite is a promising candidate for practical application as a Li-ion battery anode material.