Sulfite-Based Electrolyte Chemistry with Ion–Dipole Interactions and Robust Interphase Achieves Wide-Temperature Sodium-Ion Batteries

Currently, ether- and carbonate-based electrolytes have been extensively studied for applications in harsh conditions; however, it is difficult to develop a suitable electrolyte system that is compatible with both high and low temperatures. Herein, for the first time, a cyclic sulfite-based electrolyte is formulated to successfully achieve the wide-temperature operation of sodium-ion batteries (SIBs) from −60 to 60 °C. By precisely modulating ion–dipole interactions, the dominant ion coordination states are screened directionally to accelerate the desolvation process and simultaneously maintain sufficient electrostatic constraints, laying the foundation for high- and low-temperature compatibility. And the…

• NS
  Natural Science Foundation of Jilin Province

  Award: 20250101013JJ
• JP
  Jilin Province Development and Reform Commission

  Award: 2024C018-4
• HE
  Higher Education Discipline Innovation Project

  Award: B13013