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

In this paper, porous Mn 3 O 4 –Fe 3 O 4 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 Mn 3 O 4 –Fe 3 O 4 nanoparticles and the well-conductive rGO nanosheets, the Mn 3 O 4 –Fe 3 O 4 /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 Mn 3 O 4 –Fe 3 O 4 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.