Dual-functional CF 3 SO 3 − /amine additives synergistically construct an MgF 2 /Mg 3 N 2 -rich interphase toward high-performance magnesium–sulfur batteries

Dual OTf − /M4 additives created a non-nucleophilic electrolyte featuring mononuclear [Mg(M4) 3 (OTf)] + active species, enabling in situ formation of MgF 2 /Mg 3 N 2 -rich interphase that facilitated rapid Mg 2+ transport and high-performance Mg/S batteries.