Li metal is considered as an ideal anode for Li-O₂ batteries because of its unbeatably theoretical specific capacity and low electrode potential. Unfortunately, the growth of Li dendritic and the sensitivity to electrolyte and O₂ hinder the practical applications of Li anode. Herein, AlF₃ as an electrolyte additive is firstly employed in a Li-O₂ battery, which can boost the formation of LiF@Al-Li@Al₂O₃-rich SEI film via in-situ spontaneous reactions of AlF₃ with Li anode in O₂ atmosphere. The generated SEI film contributes to inducing the homogeneous nucleation of Li and reducing the disgusting side reactions, which can suppress the growth of Li dendrite and improve the cyclability of Li anode. Benefiting from the rational design, both the Li-O₂ and the Li|Li symmetric batteries with AlF₃ electrolyte exhibit low overpotential and good cycling stability. We hope this work could provide a facile way to in-situ construct a stable SEI film to alleviate the uneven Li nucleation for Li-O₂ batteries.

由于其无与伦比的理论比容量和低电极电位，锂金属被认为是 Li-O ₂电池的理想负极。_{不幸的是，锂枝晶的生长以及对电解质和O 2}的敏感性阻碍了锂负极的实际应用。在此，AlF ₃作为电解液添加剂首次应用于Li-O _{2电池中，通过AlF 3}与Li的原位自发反应促进富含LiF@Al-Li@Al ₂ O _3的SEI膜的形成阳极在 O ₂气氛。生成的SEI膜有助于诱导锂的均匀成核，减少令人厌恶的副反应，从而抑制锂枝晶的生长，提高锂负极的循环性能。得益于合理的设计，采用AlF _{3电解质的Li-O 2}和Li|Li对称电池均表现出较低的过电位和良好的循环稳定性。我们希望这项工作可以提供一种简便的方法来原位构建稳定的 SEI 膜，以缓解 Li-O ₂电池的不均匀 Li 成核。