The electrochemical stability window of the electrolyte solution limits the energy content of non-aqueous lithium metal batteries. In particular, although electrolytes comprising fluorinated solvents show good oxidation stability against high-voltage positive electrode active materials such as LiNi_0.8Co_0.1Mn_0.1O₂ (NCM811), the ionic conductivity is adversely affected and, thus, the battery cycling performance at high current rates and low temperatures. To address these issues, here we report the design and synthesis of a monofluoride ether as an electrolyte solvent with Li-F and Li-O tridentate coordination chemistries. The monofluoro substituent (-CH₂F) in the solvent molecule, differently from the difluoro (-CHF₂) and trifluoro (-CF₃) counterparts, improves the electrolyte ionic conductivity without narrowing the oxidation stability. Indeed, the electrolyte solution with the monofluoride ether solvent demonstrates good compatibility with positive and negative electrodes in a wide range of temperatures (i.e., from −60 °C to +60 °C) and at high charge/discharge rates (e.g., at 17.5 mA cm⁻²). Using this electrolyte solution, we assemble and test a 320 mAh Li||NCM811 multi-layer pouch cell, which delivers a specific energy of 426 Wh kg⁻¹ (based on the weight of the entire cell) and capacity retention of 80% after 200 cycles at 0.8/8 mA cm⁻² charge/discharge rate and 30 °C.

电解质溶液的电化学稳定性窗口限制了非水锂金属电池的能量含量。特别地，尽管包含氟化溶剂的电解质对高电压正极活性材料如LiNi _0.8 Co _0.1 Mn _0.1 O ₂ (NCM811)表现出良好的氧化稳定性，但离子电导率受到不利影响，因此，电池在高电压下的循环性能受到不利影响。当前的利率和低温。为了解决这些问题，我们在这里报告了一种具有 Li-F 和 Li-O 三齿配位化学的一氟化物醚作为电解质溶剂的设计和合成。溶剂分子中的单氟取代基（-CH ₂ F）与二氟（-CHF ₂）和三氟（-CF ₃）对应物不同，可提高电解质离子电导率，而不会降低氧化稳定性。事实上，具有一氟化物醚溶剂的电解质溶液在较宽的温度范围（即-60℃至+60℃）和高充电/放电速率（例如，17.5℃）下表现出与正极和负极良好的相容性。 mA cm ^-2 )。使用这种电解质溶液，我们组装并测试了320 mAh Li||NCM811多层软包电池，其比能量为426 Wh kg -1 （^基于整个电池的重量），并且在放电后容量保持率为80%在0.8/8 mA cm ^-2充电/放电速率和30℃下进行200个循环。