High Energy Density Electrode Materials for Rechargeable Magnesium Batteries
Of the possible alternatives to lithium ion, rechargeable magnesium-ion batteries are an intriguing candidate, and research into the technology has accelerated in recent years. Magnesium ion technology is promising due to divalent nature of Mg ions, presenting a potential advantage in terms of high volumetric capacity, the high natural earth abundance of magnesium, and higher atmospheric and thermal stability for magnesium metal relative to lithium metal.
One critical issue impeding progress in this area has been development of a suitable electrolyte-anode interphase which will enable reversible release of Mg2+ ions and reversible charge of Mg based anodes. A second fundamental challenge is the strong polarization of the small divalent Mg2+, requiring mitigation of the inherently slow ion diffusion associated with magnesium-ion cathodes. Progress toward viable Mg-ion battery systems will be described in this presentation, including recent achievements in the development of anodes, cathodes, and electrolytes.