▎ 摘　　要

Sandwich-like mesoporous GS@Fe3O4@C nanosheets with a 2D nanoarchitecture have been successfully synthesized by one-step solvothermal treatment. Such type of 2D nanoarchitecture is made up of a number of Fe3O4 nanoparticles uniformly grown on a graphene sheet and an even amorphous carbon layer covering on their surface. The Li-cycling properties of GS@Fe3O4@C nanosheets have been evaluated by galvanostatic discharge-charge cycling and impedance spectroscopy. Results indicate that the GS@Fe3O4@C nanosheets with about 5 wt % of graphene content provides a very high discharge capacity of 913.2 mAh g(-1) at a current densities of 200 mA g(-1) after 100 cycles and reveals a stable discharge capacity of 483.2 mAh g(-1) at a rate of 1600 mA g(-1). (C) 2016 Elsevier Masson SAS. All rights reserved.