A novel poly(acrylamide-co-acrylic acid) (P(AM-co-AA)) coating layer is facilely introduced on the top of sulfur composite cathode. The polymer membrane owns abundant and well-distributed microporous framework, favoring large electrolyte uptake and high ionic conductivity. Upon activation with the liquid electrolyte, the porous matrix immediately swells, forming a gel polymer electrolyte coating (GPEC) cathode. Not only does the unique coating design greatly restrain the out-diffusion of polysulfides from the cathode, but also improves ion transport at the cathode/electrolyte interface and provides flexible surface protection for the electrode structure. The GPEC cathode exhibits relatively low polarization, high sulfur utilization and superior cycle stability, as compared to the conventional sulfur cathode.

中文翻译：

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通过在硫阴极上涂覆凝胶聚合物电解质进行界面改性和多硫化物限制的有效策略

一种新型的聚（丙烯酰胺-共聚-丙烯酸）（P（AM-co-AA））涂层被轻松地引入硫复合阴极的顶部。聚合物膜具有丰富且分布均匀的微孔骨架，有利于大量的电解质吸收和高离子电导率。用液体电解质激活后，多孔基质立即膨胀，形成凝胶聚合物电解质涂层 (GPEC) 阴极。独特的涂层设计不仅极大地抑制了多硫化物从阴极向外扩散，而且改善了阴极/电解质界面处的离子传输，并为电极结构提供了灵活的表面保护。与传统的硫阴极相比，GPEC 阴极表现出相对较低的极化、高硫利用率和优异的循环稳定性。