Magnesium Borohydride Ammonia Borane as a Magnesium Ionic Conductor

Magnesium borohydride ammonia borane, Mg­(BH4)2(NH3BH3)2, was electrochemically investigated. Impedance measurements of the mechanochemically synthesized Mg­(BH4)2(NH3BH3)2 exhibited an ionic conductivity of 1.3 × 10–5 S cm–1 at 30 °C. Electrochemical cells fabricated with Mg­(BH4)2(NH3BH3)2 as the solid electrolyte demonstrated reversible Mg migration through the material, indicating its potential for use as a Mg ionic conductor in all-solid-state Mg-ion batteries.