Secondary batteries have shaped our modern life significantly, and high-energy-density rechargeable batteries are strongly required nowadays. However, practical Li-metal batteries have been hindered by short lifespan and safety concerns induced by Li dendrites during repeated cycles. The formation and growth of Li dendrites are mainly caused by unstable solid-electrolyte interphase (SEI) on Li-metal anode. Therefore, stable SEI on Li-metal anode is highly anticipated to promote practical applications of Li-metal batteries. The fluorinated SEI emerges as a promising SEI to regulate the behaviors of Li deposition and then enhance the stability and safety of Li-metal batteries. In this perspective, we concisely review the current fundamental understanding and key progresses of fluorinated SEI in high-voltage Li-metal batteries. Finally, we suggest the challenges and possible research directions for further development of fluorinated SEI in practical Li-metal batteries.

二次电池极大地改变了我们的现代生活，并且当今强烈需要高能量密度的可充电电池。然而，实用的锂金属电池由于寿命短以及在重复循环期间锂枝晶引起的安全隐患而受到阻碍。锂枝晶的形成和生长主要是由于锂金属阳极上不稳定的固体电解质间相（SEI）引起的。因此，高度期望在锂金属阳极上稳定的SEI可以促进锂金属电池的实际应用。氟化SEI有望成为一种有前景的SEI，它可以调节Li的沉积行为，进而增强Li-金属电池的稳定性和安全性。从这个角度出发，我们简要回顾了高压锂金属电池中氟化SEI的当前基本理解和关键进展。最后，