A Facile Surface Passivation Method to Stabilized Lithium Metal Anodes Facilitate the Practical Application of Quasi-Solid-State Batteries

Lithium metal anode matching solid electrolyte is an effective way to achieve high safety and high specific energy batteries, while the active interface of lithium metal has become a bottleneck problem that limits its application. Here, the challenges by forming an artificial solid electrolyte interphase (F-, B-containing) on lithium metal surface are surmounted. It demonstrates an extended cycling life over 2000 h of continuous plating/stripping at a high current density of 1.5 mA cm −2 . Nuclear magnetic resonance spectra prove the effectiveness of anion receptors for decoupling Li + -F − . The distribution and morphological features of the LiF/B artificial hybrid interphase can be observed from energy-dispersive spectroscopy and scanning electron microscopy. Specifically, the treated metal lithium anode is also stable in the quasi-solid-state pouch cell (polyvinylidene fluoride-hexafluoro propylene-LLZTO) system, which can make the rotor of the small aircraft rotate quickly and stably for 9.2 min.