Delocalized Electron System Enables Stable NASICON Cathode for Sodium-Ion Batteries

at 40 C), long-term cycling (88.3% after 10,000 cycles at 40 C), and operation over a temperature range of -40 to 50 °C. Importantly, the pouch-type full cell demonstrates its practical feasibility by achieving 85.2% capacity retention after 500 cycles. This study sheds new light on delocalized electron-driven reaction dynamics and the modulation of phase transitions to realize a high-performance NASICON cathode for sodium-ion batteries.