▎ 摘　　要

Three-dimensional (3D) TiO2-graphene frameworks (TGFs) with macroporous architecture were fabricated through the in situ synthesis of TiO2 with the participation of graphene oxide followed by hydrothermal assembly. TGFs exhibited a 3D hierarchical porous architecture with mesopores (2.4 nm), macropores (10-30 mu m) and a large specific surface area (196 m(2) g(-1)), which not only provided contacts between the electrode material and the electrolyte but also increased the mass transport of Li-ions in the charge/discharge process. When it was used as a cathode material in Li-ion batteries, TGFs presented an excellent reversible specific capacity of 210 mA h g(-1) at 100 mA g(-1) and an outstanding reversible cycling stability (111 mA h g(-1) after 500 cycles); even at the current density of 500 mA g(-1), TGF also performed very well. This excellent electrochemical performance was attributed to the unique 3D hierarchical porous architecture and the synergistic effects of TiO2 and graphene in Li-ion storage and transport.