The electrochemical stability window of the electrolyte solution limits the energy content of non-aqueous lithium metal batteries. This paper reports the design and synthesis of a monofluoride ether as an electrolyte solvent with Li-F and Li-O tridentate coordination chemistries. The monofluoro substituent improves ionic conductivity without narrowing oxidation stability. The electrolyte solution demonstrates good compatibility with positive and negative electrodes across a wide temperature range (-60 °C to +60 °C) and at high charge/discharge rates. A 320 mAh Li||NCM811 multi-layer pouch cell delivers a specific energy of 426 Wh kg⁻¹ and 80% capacity retention after 200 cycles.

Guangzhao Zhang, Jian Chang, Liguang Wang, Jiawei Li, Chaoyang Wang, Ruo Wang, Guoli Shi, Kai Yu, Wei Huang, Honghe Zheng, Tianpin Wu, Yonghong Deng, Jun Lu