▎ 摘　　要

Hierarchical ZnCo2O4 particles hosted by 3D graphene network were synthesized through a one-pot hydrothermal synthesis approach. The as-synthesized ZnCo2O4-graphene composites showed an outstanding overall electrochemical performance as an anode of lithium ion batteries with high specific capacity and excellent cycling stability, i.e., a reversible capacity of 1920 mAh g(-1 )at a current density of 1000 mA g(-1) after 300 cycles. In particular, at an elevated current density of 4000 mA g(-1), a high capacity of 1100 mAh g(-1) could still be achieved, and it dropped by only 34% to 730 mAh g(-1) after 2000 cycles. The synergistic roles of the hierarchically nanostructured ZnCo2O4 and highly-conductive 3D graphene networks in improving the specific capacity, rate performance, and cycling stability were discussed. (C) 2018 Elsevier Ltd. All rights reserved.