Li-O₂ batteries require catalysts to solve the problem of sluggish oxygen-related reaction kinetics. However, the solid catalysts and redox mediators are intrinsically deficient due to poor solid contacts and shuttle problems, respectively. Here, we report lithium phthalimide-N-oxyl (LiPINO) as a phase transfer catalyst (PTC) for promoting Li₂O₂ formation and its reversible decomposition through the solution-phase reactions. The interaction between LiPINO and oxygen species in the electrolyte enables the high dissolution and stability of oxygen species, the fast charge transfer at liquid-solid interfaces and superior kinetics, and the suppressed side reactions. The efficient bidirectional catalytic activity and high stability of LiPINO capacitate batteries with a highly improved discharge capacity (11400 mAh g⁻¹), a largely lowered charge potential (3.14 V) and an extended cycle life (more than 200 cycles) both in O₂ and air. Our understanding of the phase-transfer catalysis towards the Li-O₂ electrochemistry and the discovery of the PTC with superior activity and stability provide deep insights into the design of the most reliable catalysts for Li-O₂ batteries.

Li-O ₂电池需要催化剂来解决与氧相关的反应动力学缓慢的问题。然而，由于固体接触不良和穿梭问题，固体催化剂和氧化还原介体本质上是有缺陷的。在这里，我们报道了邻苯二甲酰亚胺锂 (LiPINO) 作为促进 Li ₂ O _{2的相转移催化剂 (PTC)}通过溶液相反应形成及其可逆分解。LiPINO与电解质中氧物质之间的相互作用使氧物质具有高溶解性和稳定性，液固界面处的快速电荷转移和优异的动力学，以及抑制副反应。LiPINO电容电池的高效双向催化活性和高稳定性，在O _{2中均具有显着提高的放电容量（11400 mAh g} ^-1）、大大降低的充电电位（3.14 V）和延长的循环寿命（超过200次循环）和空气。我们对 Li-O _{2相转移催化的理解电化学和具有优异活性和稳定性的 PTC 的发现为设计最可靠的 Li-O 2}电池催化剂提供了深刻的见解。