▎ 摘　　要

Inverse spinel SnFe2O4 as an anode material for lithium-ion batteries (LIBs) suffers from poor cycling stability due to its lower conductivity and excess volume change during charge/discharge process. In order to overcome the obstacles, a series of SnFe2O4@reduced graphene oxide (rGO) composites with different amount of Sn(Fe)-C bonds between SnFe2O4 and rGO interface are synthesized through a simple one-pot solvothermal method and subsequent sintering at different temperatures. The composite with higher Sn(Fe)-C bonds content exhibits higher charge/discharge capacities of 1010/1020 mAh g(-1) at 0.5 A g(-1) for 300 cycles, and a better rate capability of 620 mAh g(-1) at 2.0 A g(-1). The synergistic effect of larger content of Sn(Fe)-C bonds and the formed flower-like networks between the pulverized SnFe2O4 and the rGO interface during charge/discharge is favor to improve the kinetics of SnFe2O4, because the networks are acted as the transport highway for electronics and lithium-ions. Moreover, the higher content and strong action of Sn(Fe)-C bonds can prevent the SnFe2O4 nanoparticles suffer from excessively volume change and pulverize during cycling. Designing chemically bonded metal oxides with graphene composite could provide a simple way to improve the cycle stability and rate capability of the LIBs. (C) 2020 Elsevier B.V. All rights reserved.