A new class of electrolytes based on magnesium bis(diisopropyl)amide for magnesium–sulfur batteries

Abstract

We present a new class of electrolytes, which has relatively high anodic stability on stainless steel (2.65 V, vs. Mg RE), low over-potential for Mg plating/stripping and close to 100% coulombic efficiency, for Mg–S batteries prepared by a facile in situ reaction of commercial magnesium bis(diisopropyl)amide (MBA) with AlCl₃, The resulting Mg–S battery shows a highly stable discharge capacity of approximately 540 mA h g⁻¹ for 30 cycles and one well-defined voltage plateau of about 1.1 V vs. Mg.