▎ 摘　　要

The solid-state method is a mainly adopted large-scale preparation of LiFePO4 cathode materials for Li-ion batteries but suffers from a challenge of irregular morphology and particle agglomeration. Herein, a graphene-supported LiFePO4/C@G composite with uniform morphology and electronic conducting network was synthesized via a freeze-drying assisted solid-state method without ball milling using the integrated LiFePO4(OH) as precursor. The integrated LiFePO4(OH) as precursor may avoid segregation of element caused by inhomogeneous mixing of raw materials in the process of solid-state preparation. The as-prepared graphene-coated LiFePO4/C@G shows excellent electrochemical properties with a specific capacity of 156, 154, 150, 145, 139, 132 mA h g(-1) at 0.1, 0.2, 0.5, 1, 2, 5 C and a capacity retention of around 97.0% for 200 cycles at 2 C. This can be attributed to uniform element distribution and continuous electronic conducting network. The freeze-drying assisted solid-phase method using LiFePO4(OH) precursor and graphene is a promising route for production of LiFePO4/C materials with excellent performances.