Graphene oxide-decorated Fe2(MoO4)3 microflowers as a promising anode for lithium and sodium storage

Mixed transition metal oxides (MTMOs) have received intensive attention as promising anode materials for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). In this work, we demonstrate a facile one-step water-bath method for the preparation of graphene oxide (GO) decorated Fe-2(MoO4)(3) (FMO) microflower composite (FMO/GO), in which the FMO is constructed by numerous nanosheets. The resulting FMO/GO exhibits excellent electrochemical performances in both LIBs and SIBs. As the anode material for LIBs, the FMO/GO delivers a high capacity of 1,220 mAh.g(-1) at 200 mA.g(-1) after 50 cycles and a capacity of 685 mAh.g(-1) at a high current density of 10 A.g(-1). As the anode material for SIBs, the FMO/GO shows an initial discharge capacity of 571 mAh.g(-1) at 100 mA.g(-1), maintaining a discharge capacity of 307 mAh.g(-1) after 100 cycles. The promising performance is attributed to the good electrical transport from the intimate contact between FMO and graphene oxide. This work indicates that the FMO/GO composite is a promising anode for high-performance lithium and sodium storage.