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

Key Points

• To investigate how dual-functional CF3SO3−/amine additives affect interphase formation in magnesium-sulfur batteries.
• Synthesis of dual OTf−/M4 additives for the electrolyte
• Characterization of mononuclear [Mg(M4)3(OTf)]+ active species
• Evaluation of MgF2/Mg3N2-rich interphase formation and Mg2+ transport efficiency.
• Formation of a non-nucleophilic electrolyte featuring active species.
• In situ creation of MgF2/Mg3N2-rich interphase enhances Mg2+ transport.
• Improved performance metrics observed in magnesium-sulfur battery tests.