▎ 摘　　要

ZnCo2O4/N-doped three-dimensional graphene (N-3DG) composite is successfully prepared by a facile two-step method involving a solvothermal process and subsequent annealing treatment. SEM and TEM results reveal that ZnCo2O4 nanoparticles with a size of 20-40 nm are uniformly embedded within 3D graphene matrix. The ZnCo2O4/N-3DG composite as an anode material presents a high initial discharge capacity of 1654 mAh/g and maintains a reversible capacity of 1102 mAh/g after 150 cycles. After being cycled at various rates for 90 cycles, the capacity can recover to 721 mAh/g at 80 mA/g. The high reversible capacity, long cycling life and good rate performance can be attributed to the 3D interconnected architecture and the excellent properties of N-doped graphene. (C) 2015 Elsevier B.V. All rights reserved.