Multifunctional Additives Improve the Electrolyte Properties of Magnesium Borohydride Toward Magnesium–Sulfur Batteries

Highly reductive magnesium borohydride [Mg(BH4)2] is compatible with metallic Mg, making it a promising Mg-ion electrolyte for rechargeable Mg batteries. However, pure Mg(BH4)2 in ether-based solutions displays very limited solubility (0.01 M), low oxidative stability ( 99%). The newly-generated active cation and anion species revealed by Raman, N...