The Li–O₂ battery based on the polymer electrolyte has been considered as the feasible solution to the safety issue derived from the liquid electrolyte. However, the practical application of the polymer electrolyte-based Li–O₂ battery is impeded by the poor cyclability and unsatisfactory energy efficiency caused by the structure of the porous cathode. Herein, an architecture of a composite cathode with improved oxidation kinetics of discharge products was designed by an in situ method through the polymerization of the electrolyte precursor for the polymer-based Li–O₂ battery. The composite cathode can provide sufficient gas diffusion channels, abundant reaction active sites, and continuous pathways for ion diffusion and electron transport. Furthermore, the oxidation kinetics of nanosized discharge products formed in the composite cathode can be improved by hexamethylphosphoramide during the recharge process. The polymer-based Li–O₂ batteries with the composite cathode demonstrate highly reversible capacity when fully charged and a long cycle lifetime under a fixed capacity with low overpotentials. Moreover, the interface contact between hexamethylphosphoramide and the Li metal can be stabilized simultaneously. Therefore, the composite cathode architecture designed in this work shows a promising application in high-performance polymer-based Li–O₂ batteries.

中文翻译：

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聚合物基Li-O2电池中具有改进的氧化动力学的复合阴极体系结构。

基于聚合物电解质的Li–O ₂电池已被视为解决源自液体电解质的安全问题的可行解决方案。然而，由于多孔阴极的结构引起的循环性差和能量效率不佳，阻碍了聚合物电解质基Li-O ₂电池的实际应用。本文中，通过电解质前驱体的聚合制备了基于聚合物的Li–O _2的原位方法，设计了具有改善的放电产物氧化动力学的复合阴极体系电池。复合阴极可提供足够的气体扩散通道，丰富的反应活性位点以及用于离子扩散和电子传输的连续路径。此外，在再充电过程中，六甲基磷酰胺可改善复合阴极中形成的纳米级放电产物的氧化动力学。带有复合阴极的聚合物基Li–O ₂电池在充满电时表现出高度可逆的容量，在固定容量和低过电势下具有长循环寿命。而且，可以同时稳定六甲基磷酰胺和Li金属之间的界面接触。因此，这项工作中设计的复合阴极体系结构在高性能聚合物基Li–O _2中显示出有希望的应用 电池。