Rechargeable Magnesium Batteries Using a Novel Polymeric Solid Electrolyte

Solid-state magnesium (Mg) batteries have been constructed with a novel polymeric electrolyte that conducts ion at ambient temperature. The polymeric electrolyte consisting of oligo(ethylene oxide)-grafted polymethacrylate and a linear polyether dissolving an Mg salt showed as high ionic conductivity as 0.4 mS cm −1 at 60°C. A test cell made of a cathode and an Mg metal anode with the -conducting polymeric electrolyte showed the first discharge capacity of about The discharge capacity and the rechargeability of the cell were improved when Mg metal was substituted by Li metal. The discharge and recharge profile of the cell using an Mg-doped anode proved that the present polymeric -ion conductor will help to develop an all-solid rechargeable Mg-ion battery.