▎ 摘　　要

Novel hybrid materials of well-dispersed Co3O4 nanoparticles with high density anchored on nitrogen-doped graphene (CNGs) are reported. The prepared CNGs show high performance as anode materials for lithium-ion batteries (LIBs), such as high initial discharge capacity (1080.9 mA h g(-1) at 50 mA g(-1)), long cycling stability (a high reversible capacity of 867.9 mA h g(-1) after 350 cycles), and high rate capability (155.6 mA h g(-1) at 2 A g(-1)). The high performance arises from the synergetic effect of conductive nitrogen-doped graphene sheets and ultra-small Co3O4 nanoparticles, which highlights the importance of the anchoring of the small sized nanoparticles on the doped graphene sheets for applications in LIBs.