A novel all-solid-state hybrid polymer electrolyte (HPE) with mechanical robustness was fabricated via initiator-free thiol–ene photopolymerization triggered by UV irradiation. The thiolated polyhedral oligomeric silsesquioxane (POSS-SH) prepared by the hydrolysis of (3-mercaptopropyl) trimethoxysilane offers a reactive thiol group and endows high mechanical strength resulting from the POSS core. The HPE was fabricated via thiol–ene photopolymerization of POSS-SH and polyethylene glycol dimethylacrylate (PEGDMA) to form a cross-linked network, and the ionic conductivity of HPE was enhanced through the continuous migration of lithium ion via the PEG chain. The formed HPE was mechanically robust and flexible due to the hybrid POSS core and the cross-linked structure. It exhibits good thermal stability up to 285 °C with 5% decomposition of the polymer matrix and the interfacial stability with lithium foil. The POSS-based hybrid polymer electrolyte (PHPE) shows better stretchability and excellent ionic conductivity up to 2.1 × 10⁻⁴ S cm⁻¹ at 30 °C than the polymer electrolyte prepared by photopolymerization of PEGDMA in the absence of POSS-SH. Furthermore, assembled with LiFePO₄ and lithium foil, the resulting coin cell has good reversible specific capacity and considerable rate capability.

中文翻译：

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通过无引发剂的硫醇-烯光聚合反应轻松制备杂化聚合物电解质，用于高性能全固态锂金属电池

与机械强度的新型的全固态杂化聚合物电解质（HPE）制作通过由UV照射引发自由引发剂，硫醇-烯光聚合。通过（3-巯基丙基）三甲氧基硅烷的水解制备的硫醇化多面体低聚倍半硅氧烷（POSS-SH）提供了一个活性硫醇基团，并由于POSS核而具有较高的机械强度。HPE是通过POSS-SH与聚乙二醇二甲基丙烯酸二甲酯（PEGDMA）的硫醇-烯光聚合反应形成交联网络而制造的，而HPE的离子电导率则通过锂离子的连续迁移而得以增强。PEG链。由于混合的POSS核心和交联的结构，形成的HPE具有机械强度和灵活性。它在高达285°C的温度下表现出良好的热稳定性，其中聚合物基体的5％分解以及与锂箔的界面稳定性。与在没有POSS-SH的情况下通过PEGDMA光聚合制备的聚合物电解质相比，基于POSS的杂化聚合物电解质（PHPE）在30°C时具有高达2.1×10 ^-4 S cm ^-1的拉伸性和优异的离子电导率。此外，将其与LiFePO ₄和锂箔组装在一起，具有良好的可逆比容量和相当大的倍率容量。