Emerging Ultralow‐Temperature Electrolytes for Lithium Batteries Operated Below −30 °C

Lithium batteries operated at ≤−30 °C have been attracted overwhelming attentions, while encountering severe challenges, especially charging at temperatures below −30 °C, one of which is how to design ideal low‐temperature electrolytes. In low‐temperature lithium batteries, electrolytes play a crucial role in the transport of Li + , maintaining the stability of the electrode‐electrolyte interface and enhancing the batteries’ kinetics. Herein, we comprehensively summarize recent strategies for designing low‐temperature electrolytes, elucidating how lithium salts, solvents, and additives regulate the solvation structure of Li + , stabilize the interface, and influence electrochemical performance at low‐temperature. Moreover, prospects are provided for the design and commercialization of low‐temperature electrolytes in this review. Different from previous reviews, we mainly focused on low‐temperature electrolytes for lithium batteries operated at ≤−30 °C, especially for those can still charge at ≤−30 °C.