A Magnesium Tetraphenylaluminate Battery Electrolyte Exhibits A Wide Electrochemical Potential Window And Reduces Stainless Steel Corrosion

Using Al(OPh)(3) rather than the typical AlCl3 with Grignard reagents affords a Mg-ion electrolyte with a reduced chloride content. A1 : 4 Al(OPh)(3)-PhMgCl mixture gives a magnesium tetraphenylaluminate salt that exhibits anodic stability up to 5 V vs. Mg2+/0 on both platinum and stainless steel working electrodes, and shows much reduced corrosion (pitting) of stainless steel after extended electrolysis at 4.5 V.