Dipolar interaction-mediated molecular anchoring electrolyte enables wide-temperature sodium-ion batteries with enhanced safety and durability

O), a dynamic hierarchical solvation network is constructed and its unique interface stabilization mechanism is revealed by multiscale characterizations and theoretical insights. The electrolyte endows high-voltage phosphate positive electrodes with high electrochemical durability (for instance, 87.6% of capacity retention after 5000 cycles at 2 C) through constructing robust interphases containing fluorine and nitrogen elements. Good compatibility with commercial layered oxide positive electrodes further indicates its versatility. Strikingly, the electrolyte also makes it feasible to operate under wide temperature range (-60 ~ 70 °C). Our proposed dipolar interaction regulation mechanism provides an effective approach for designing safe and durable electrolytes, stimulating practical application of wide-temperature sodium-ion batteries in pursuit of sustainable energy storage.