Weakly‐Solvated and Co‐Intercalation‐Free Ether‐Based Electrolytes Enhance the Low‐ Temperature and Fast‐Charging Performance of LiFePO 4 ||Graphite Batteries

O-rich solid electrolyte interphase (SEI) on the Gr anode, thereby enhancing low-temperature interfacial transport. Consequently, the Gr||Li half-cell and the LFP||Gr full cell with this WSE demonstrates excellent rate performance, stable cycling stability, and a high specific capacity at -30 °C while also delivering reliable power even at -60 °C. These results underscore the electrolyte's efficient desolvation process, stable SEI layer, and excellent compatibility with graphite, rendering it ideal for extreme-temperature applications.