Robust lithium-ion diffusion kinetics enable superior battery performance even under harsher conditions, but the complex processes containing transport via liquid, interphase, and solid phases make it challenging. Herein, a dual halide-based electrode/electrolyte interphase (EEI) strategy is proposed to boost the Li⁺ ion diffusion kinetics through rational design of electrolyte. This dual-halide EEI not only accelerates interfacial Li⁺ diffusion but also protects electrodes from taking side reactions under high-voltage and harsh temperatures. Benefiting from these features, the Li/LiCoO₂ cells deliver an impressive performance at high-voltage window 4.5 V (209 mAh g^–1, 95.2% capacity retention after 100 cycles) and wide temperatures (98.1% capacity retention at 60 °C after 100 cycles; 87.7% capacity retention at −20 °C after 20 cycles). These results well demonstrate the efficiency of this dual halide EEI, which empowers lithium metal batteries toward practical applications.

中文翻译：

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双卤化物中间相实现宽温度范围内的高性能锂金属电池

即使在更恶劣的条件下，强大的锂离子扩散动力学也能实现卓越的电池性能，但包含通过液相、相间和固相传输的复杂过程使其具有挑战性。在此，提出了一种基于双卤化物的电极/电解质界面（EEI）策略，通过合理设计电解质来提高Li ⁺离子扩散动力学。这种双卤化物EEI不仅可以加速界面Li ⁺扩散，还可以保护电极在高电压和恶劣温度下不发生副反应。受益于这些特性，Li/LiCoO ₂电池在 4.5 V 高压窗口（209 mAh g ^–1，100次循环后容量保持率为 95.2%）和宽温度范围（60 °C 下容量保持率为 98.1%）下提供了令人印象深刻的性能。 100 个循环；20 个循环后，-20 °C 下容量保持率为 87.7%）。这些结果很好地证明了这种双卤化物EEI的效率，使锂金属电池能够走向实际应用。