High-capacity and highly stable electrodes are crucial for advancing metal-ion battery (MIB) technologies.Bivalent-ion batteries have garnered attention as safer, higher-energy-d. alternatives to monovalent MIBs due to the abundance and bivalence of the metal atoms.The suitability of Sc2C and Sc2CF2 MXene monolayers as anodes for bivalent metal atoms (Mg, Ca, and Zn) have been evaluated.The adsorption properties, diffusion barriers, charge transfer behavior, theor. storage capacities, and voltage profiles of the bivalent metal atoms on these MXenes are analyzed to determine their feasibility for efficient intercalation.The results show that both Sc2C and Sc2CF2 monolayers exhibit strong binding energies with the bivalent metals and low diffusion barriers, enabling rapid metal-ion transport within the MXene structures.Specifically, magnesium (Mg)-ion diffusion displays the barrier of 0.13 eV on the Sc2C monolayer and appears nearly barrierless (0.09 eV) on the Sc2CF2 monolayer.The Mg-adsorbed MXene composites exhibit ultra-high theor. storage capacities of 3154.12 and 2298.00 mA h/g for the Sc2C and Sc2CF2 systems, resp.Voltage profile anal. indicates that Sc2C and Sc2CF2 provide suitable operating voltages for MIB anodes.These findings suggest that Sc2C and Sc2CF2 MXenes are superior anode materials, potentially enabling durable, high-capacity, and sustainable Mg-based energy storage systems.