In-situ construction of Mn–Fe mixed oxides nanoparticles on reduced graphene oxide with superior lithium storage property

Abstract

In this paper, porous Mn3O4–Fe3O4 nanoparticles with highly uniform composition are in-situ anchored on reduced graphene oxide (rGO) nanosheets by a simple cyanometallic framework template method. Thanks to the synergistic effects between the porous Mn3O4–Fe3O4 nanoparticles and the well-conductive rGO nanosheets, the Mn3O4–Fe3O4/rGO composites present superior electrochemical lithium storage performances with a great reversible capacity of 1013 mAh g−1 after 100 cycles at 0.1 A g−1, satisfactory rate capability of 510 mAh g−1 at 3.0 A g−1, and eminent long-term cycle stability of 804 mAh g−1 after 500 cycles at 0.5 A g−1. It is demonstrated that the rGO can not only act as a conducting matrix, but also buffer the volume expansion and avoid the aggregation of the Mn3O4–Fe3O4 nanoparticles during charging-discharging. The work provides a simple strategy for designing and fabricating advanced multi-component metal oxide-based anodes for high-performance lithium-ion battery.