▎ 摘　　要

Aqueous rechargeable magnesium ion batteries are a dramatic safe, low-cost, and green energy storage system but are trapped in low-capacity cathode and enormously limited anode materials. Therefore, based on previous research foundations, the Mg-OMS-1/graphene composite as a cathode is obtained by combining the todorokite-type Mg-OMS-1 with nanowire morphology and flaky graphene, exhibiting higher electrochemical properties. The discharged capacities of single and composite electrodes in the Mg(NO3)(2) electrolyte are 150.4 and 194.1 mAh g(-1) at a current density of 20 mAg(-1), respectively. Additionally, the self-made carbon molecular sieve (CMS) material is explored as an anode material in this aqueous energy storage system, displaying a discharged capacity of 64.8 mAh g(-1) at 100 mA(-1). Furthermore, an aqueous rechargeable magnesium ion battery capacitor device is assembled using composite electrode material as a cathode and CMS material as an anode. This system displays an excellent cycling lifespan with 98.6% capacity retained after 800 cycles at a current density of 100 mAg(-1).