Aprotic lithium-oxygen (Li–O₂) batteries hardly cycle at the condition of high area capacity for realizing their high energy density, because the unconducive lithium peroxide (Li₂O₂) discharge product limits the electron transfer between electrode and O₂/Li₂O₂. Here, it is demonstrated that one of redox mediator (RM), triethylene glycol bis-2,2,6,6-tetramethylpiperidin-1-oxyl radical (D-TEMPO), can be effectively used to promote the electron transfer between electrode and Li₂O₂, which the shuttle effect of RM can be cooperatively inhibited by regulating the size of RM and the thickness of ion-selective membrane. As a result, the Li–O₂ battery coupled with double cathodes, D-TEMPO, and ion-selective membrane can be stably operated for 46 days at a capacity of 5 mAh cm⁻². The concept in this work provides the cooperative design of a stable solution-mediated pathway for high-capacity Li–O₂ battery with long cycle stability.

中文翻译：

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氧化还原介体与离子选择膜协同抑制大循环容量锂氧电池的穿梭效应

非质子锂氧（Li–O ₂）电池很难在高面积容量条件下循环以实现其高能量密度，因为不导电的过氧化锂（Li ₂ O _{2 ）放电产物限制了电极和O 2} /之间的电子转移。Li ₂ O ₂。在这里，证明了氧化还原介体（RM）之一，三甘醇双-2,2,6,6-四甲基哌啶-1-氧基自由基（D-TEMPO）可以有效地促进电极和电极之间的电子转移。 Li ₂ O ₂，​​通过调节RM的尺寸和离子选择性膜的厚度可以协同抑制RM的穿梭效应。结果，与双正极、D-TEMPO和离子选择膜耦合的Li-O ₂电池可以在5mAh cm ^-2的容量下稳定运行46天。_{这项工作的概念为具有长循环稳定性的高容量Li-O 2}电池提供了稳定溶液介导途径的协同设计。