Abstract Gel polymer electrolyte (GPE) is promising to accomplish high energy density and high safe lithium-sulfur (Li-S) batteries owing to their higher ionic conductivity than solid electrolyte and lower mobility than liquid electrolyte. Herein, a novel polyethylene (PE) separator supported GPE rich in ester groups was synthesized via in-situ polymerized pentaerythritol tetraacrylate (PETEA) with divinyladipate (Ester) on PE separator. This novel PE supported GPE (PEGPE) achieved a decent ionic conductivity of 2.8 × 10−4 S cm−1 at room temperature and exhibited a wide electrochemical window up to 4.75 V vs Li/Li+. The assembled Li-S battery using this novel PEGPE delivered better rate capability and cycling stability than liquid electrolyte. Our work presents a reliable and efficient GPE enabling high energy density and high safe Li-S batteries, which would boost the practical application of Li-S batteries.

中文翻译：

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由富含酯基的可靠凝胶聚合物电解质实现锂硫电池的稳定循环

摘要 凝胶聚合物电解质（GPE）具有比固态电解质更高的离子电导率和比液态电解质更低的迁移率，有望实现高能量密度和高安全性的锂硫（Li-S）电池。在此，通过原位聚合季戊四醇四丙烯酸酯 (PETEA) 与己二酸二乙烯酯 (Ester) 在 PE 隔膜上合成了一种新型的聚乙烯 (PE) 隔膜负载富含酯基的 GPE。这种新型 PE 支持的 GPE (PEGPE) 在室温下实现了 2.8 × 10−4 S cm−1 的良好离子电导率，并表现出高达 4.75 V vs Li/Li+ 的宽电化学窗口。使用这种新型 PEGPE 组装的锂硫电池比液体电解质具有更好的倍率性能和循环稳定性。我们的工作提供了一种可靠且高效的 GPE，可实现高能量密度和高安全性的锂硫电池，