Dual-Defect Engineering Strategy Enables High-Durability Rechargeable Magnesium-Metal Batteries

MVOH/rGO cathode with dual defect of Mg2+pre-intercalation defect (P-Mgd) and surface oxygen defect (Od) is prepared.The dual defect of Odand P-Mgdin MVOH/rGO lamellar structure effectively enhances Mg2+migration kinetics, structural stability, and electronic conductivity.The Mg foil//MVOH/rGO full cell achieves an ultralong lifespan of 850 cycles at 0.1 A g−1and powers an orange light-emitting diode.