![]() The discharge capacity of Mg-OMS-1 // FeVO4/C aqueous battery can be obtained 58.9 mAh g−1 at the current density of 100 mA g−1 by calculating the total mass of two electrodes and the capacity retention rate of this device is 97.7% after 100 cycles with the nearly 100% coulombic efficiency, which indicates that the system owns a good electrochemical reversibility. Therefore, the aqueous rechargeable magnesium ion full battery is successfully constructed by FeVO4/C as anode, Mg-OMS-1 as cathode and in 1.0 mol L−1 MgSO4 as electrolyte. And the FeVO4/C material can not only improve the electrical conductivity by coating a carbon layer but also increase the specific surface area by hierarchical pore structure, which is more beneficial for magnesium ion insertion/deinsertion. ![]() The porous FeVO4 is prepared by hydrothermal method and further modified by coating carbon to obtain the FeVO4/C with hierarchical pore structure, which are used as anodic electrodes in aqueous rechargeable magnesium ion battery.
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