Electrochemical Intercalation of Mg2+ in Magnesium Manganese Silicate and Its Application as High-Energy Rechargeable Magnesium Battery Cathode

A study oil electrochemical intercalation of bivalent cation Mg2+ in magnesium manganese silicate is reported. Reversible Mg2+ intercalation can be demonstrated and the process is enhanced by use of nanoscopic particles, resulted from a lower interfacial charge transfer resistance and a shorter solid-state diffusion distance of MC2+ in the host. As a step toward novel rechargeable magnesium battery system, we have demonstrated the feasibility of the electrochemical oxidation, reduction, and cycling of magnesium manganese silicate. The results show that the silicate compound could be a good host for Mg2+ intercalation and a potential cathode material for high-energy rechargeable magnesium batteries.