In the past few years, magnesium rechargeable batteries (MRBs) have attracted significant interest because of dendrite-free deposition and earth-abundant Mg resources. Despite the recent progress, the development of practical MRBs remains hindered largely due to the limited choices of Mg-intercalation electrodes. I will present our methods to overcome the large Mg²⁺ ion diffusion barrier to enhance the Mg diffusivity in two-dimensinoal materials. Theory, synthesis, electrochemical measurements, and kinetic analysis are combined to improve Mg diffusion behavior in MoS₂, which is a poor Mg transporting material in its pristine form. I will also report a MgCl⁺ storage mechanism based on activated two-dimensional materials which enables high reversible capacity and excellent cycling stability.