Nanosheets Self-Assembled 3D LiFeO4/Graphene as Cathode Material for Lithium-Ion Batteries

Abstract

In order to understand the feasibility of using graphene as cathode materials for lithium-ion batteries, this paper uses graphene as an additive to prepare graphene-coated three-dimensional flower-shaped FeO4 nanostructures by one-step hydrothermal method. The obtained composite nano-material is composed of FeO4 nano flower-balls assembled by graphene and dozens of nanosheets. The crystal structure and morphology of the material were characterized by XRD and SEM, and their electrochemical properties were also studied. After cycling 50 times at a current density of 1000 m Ah/g, the reversible capacity of the FeO4/graphene composite still reaches 503.1 m Ah/g and the capacity retention rate is as high as 82%.