▎ 摘　　要

The practical application of Co3O4 base anode material is severely limited by its extremely low electrical conductivity and large specific volume changes during lithium ion insertion/extraction. Herein, an effective strategy is being implemented to mitigate the capacity fading of Co3O4 at high-rate by embedding Co3O4 nanomaterial under the reduced graphene oxide (CGF). The CGF composite has been synthesized through a two-step process, involving a hydrothermal reaction of cobalt nitrate hexahydrate and CTAB in the presence of graphene oxide (GO) and a subsequent calcination. When tested as the anode in lithium ion batteries (LIBs), the CGF composite exhibits an obvious enhancement in electrochemical performance, especially in rate capability. Under current density of 1.0 Ag-1,the CGF composite could deliver reversible capacity as high as 1120.8 mAh g(-1) after 250 cycles. The superior performance of CGF composite may be ascribed to the unique hybrid microstructure, which can alleviate the stresses caused by volume variations, reduce charge transfer resistance, improve the accessibility of anode to electrolyte and increase the tapping density. The results clearly demonstrate that this unique electrode architecture is ideally suited for LIBs. (C) 2017 Elsevier B.V. All rights reserved.