Hierarchical Fe3O4 microsphere/reduced graphene oxide composites as a capable anode for lithium-ion batteries with remarkable cycling performance

A facile one-pot solvothermal method has been used to synthesize hierarchical Fe3O4 microsphere and reduced graphene oxide (rGO) composite. The Fe3O4 microspheres are assembled with nanoparticles as primary building blocks and covered by the rGO sheets. When used as an anode material for lithium-ion batteries, the composite displays a high specific capacity, good cycle stability, remarkable rate capability. The synergetic effect of the unique nano/micro hierarchical structure and high conductivity rGO modification promise a good soakage of electrolyte, high structure stability and enhanced electronic transition, leading to an excellent electrochemical performance. This work would open a new doorway for designing the electrode materials of lithium-ion batteries with superior performance. (C) 2016 Elsevier B.V. All rights reserved.