From days to hours: accelerated synthesis of Nb₂CT_X MXene with enhanced lithium storage capability

To overcome limitations of lithium-ion batteries, MXenes have emerged as promising candidates, yet conventional synthesis is hazardous and inefficient. Herein, an ultra-fast ammonium bifluoride strategy enables rapid Nb₂CT_X synthesis within 6 hours, improving conductivity, interlayer structure, and ion transport, thus delivering enhanced lithium storage performance and excellent cycling stability.