Superior high rate capability of MgMn 2 O 4 /rGO nanocomposites as cathode materials for aqueous rechargeable magnesium ion batteries.

Incorporation of reduced graphene oxide (rGO) optimizes the interfacial properties of MgMn2O4 and improves the Mg2+ diffusion in the electrode. This results in enhanced specific capacity and rate capability. MgMn2O4/rGO nanocomposites show a large discharge specific capacity of 140.1 mA h g-1 at a current density of 1000 mA g-1.