Li–O₂ batteries have attracted wide attention on account of the ever-increasing demand of high energy density systems. However, their practical application is still facing many critical problems, especially the slurry reaction rate/serious side reactions on cathodes and the fast growth of Li dendrites/passivating layers on anodes. Therefore, we design an in-situ formed coating layer on Li metal anode by introducing thionyl chloride (SOCl₂) additives into the Li–O₂ system with a redox mediator (RM), LiI. The robust and uniform SOCl₂-derived layer can effectively prevent the attack of O₂/O₂^–, which inhibits the surface passivation of Li metal anode and greatly supresses the infinite dendrite growth. Additionally, the SOCl₂ additive also contributes to a certain specific capacity of the Li–O₂ cells at full discharge/charge conditions. Moreover, the SOCl₂-derived coating layer can almost completely stop the diffusion of the soluble I-based RM on Li metal anode to eliminate contiunous side reactions between them. The symmetrical batteries containing SOCl₂ display lower overpotentials and longer cycling life than those of cells without SOCl₂. More importantly, the SOCl₂ based Li–O₂ batteries with LiI exhibit the extra-high capacity (31000 mAh g⁻¹), ultra-small voltage polarization (∼1.4 V), and extended operation life (190 cycles).

由于对高能量密度系统的需求不断增长， Li-O _{2电池引起了广泛关注。}然而，它们的实际应用仍面临许多关键问题，尤其是正极上的浆料反应速率/严重的副反应以及负极上锂枝晶/钝化层的快速生长。因此，我们通过将亚硫酰氯 (SOCl ₂ ) 添加剂引入具有氧化还原介体 (RM) LiI 的Li-O _{2体系，在锂金属负极上设计了一个}原位形成的涂层。坚固而均匀的 SOCl ₂衍生层可有效防止 O ₂ /O ₂ ^–，抑制了锂金属负极的表面钝化，极大地抑制了无限枝晶的生长。此外，SOCl _{2添加剂还有助于 Li-O 2}电池在完全放电/充电条件下的特定比容量。此外，SOCl ₂衍生涂层几乎可以完全阻止可溶性 I 基 RM 在锂金属负极上的扩散，从而消除它们之间的连续副反应。_{含有SOCl 2 的}对称电池比不含SOCl ₂的电池表现出更低的过电位和更长的循环寿命。更重要的是，含有 LiI 的基于 SOCl ₂的 Li-O ₂电池表现出超高容量（31000 mAh g⁻¹）、超小电压极化（~1.4 V）和延长的使用寿命（190 次循环）。