• Branch chain-rich diisopropyl ether (DIPE) was selected as co-solvent of low-temperature electrolyte for lithium metal battery.

• The introduction of DIPE improved the disorder of electrolyte and the branch chains from DIPE exclude other solvents from the Li⁺ solvent sheath, thereby achieving a rapid desolvation process.

• The electrolyte guaranteed a uniform Li stripping and deposition during cycling at both room temperature and low temperature and ensured stable cycling performance for Li||LFP cells over 650 cycles at − 20 °C.

中文翻译：

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具有空间位阻的富含支链的二异丙醚有利于锂电池在−20°C下稳定循环

• 选择富含支链的二异丙醚（DIPE）作为锂金属电池低温电解液的共溶剂。

• DIPE的引入改善了电解质的无序性，并且DIPE的支链将其他溶剂排除在Li ⁺溶剂鞘之外，从而实现了快速去溶剂化过程。

• 该电解液保证了室温和低温循环过程中锂的均匀剥离和沉积，并确保Li||LFP电池在− 20 °C下超过650个循环的稳定循环性能。