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首页> 外文期刊>RSC Advances >Deformable and flexible electrospun nanofiber-supported cross-linked gel polymer electrolyte membranes for high safety lithium-ion batteries
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Deformable and flexible electrospun nanofiber-supported cross-linked gel polymer electrolyte membranes for high safety lithium-ion batteries

机译：高安全性锂离子电池用可变形且柔软的静电纺丝纳米纤维支撑的交联凝胶聚合物电解质膜

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A deformable and flexible cross-linked composite gel polymer electrolyte (CGPE) membrane, blended with an ionic liquid (IL) diluent, was successfully prepared for lithium-ion batteries. Herein, a cross-linked composite gel polymer electrolyte membrane in the presence of an IL resulted in the formation of a solid-like, elastic gel directly within the poly(vinylidene fluoride-co-hexafluoropropylene) electrospun skeleton via in situ UV-induced cross-linking of poly(ethylene glycol)methyl ether methacrylate (PEGMA), pentaerythritol tetraacrylate, and PEGMA monomers. The CGPE membrane exhibited significantly improved film flexibility and prevented liquid leakage while maintaining some advantageous features such as good liquid retention, high ionic conductivity, and good thermal stability. Moreover, the CGPE-3 exhibited the best performance, with a wide electrochemical potential window of up to 5.0?V vs. Li+/Li and a high ionic conductivity of 1.7 × 10?3 S cm?1. The Li/CGPE/LiFePO4 cells with CGPE-3 exhibited stable electrochemical performance and yielded specific capacities of 160, 150, 136, 122, and 91 mA h g?1 at 0.1, 0.2, 0.5, 1.0, and 2.0C rates, respectively; moreover, they retained their properties well after 100 cycles for each rate. These solid-like gel polymer electrolyte membranes with excellent properties represent a very promising material for high-performance lithium-ion batteries with improved safety and reliability.
机译：已成功制备出可变形且柔性的交联复合凝胶聚合物电解质（CGPE）膜，与离子液体（IL）稀释剂共混，可用于锂离子电池。在此，在IL存在下的交联的复合凝胶聚合物电解质膜导致直接在聚偏二氟乙烯- co <​​/ em>-六氟丙烯）电纺丝骨架内形成固体状的弹性凝胶。通过紫外线原位诱导聚甲基丙烯酸乙二醇酯（PEGMA），季戊四醇四丙烯酸酯和PEGMA单体的交联。 CGPE膜表现出显着改善的膜柔韧性并防止了液体泄漏，同时保持了一些有利的功能，例如良好的保液性，高离子电导率和良好的热稳定性。此外，CGPE-3表现出最好的性能，电化学电势窗口宽达5.0？V vs。 Li + / Li离子电导率为1.7×10 ？3 S cm ？1 。具有CGPE-3的Li / CGPE / LiFePO 4 电池表现出稳定的电化学性能，并产生160、150、136、122和91 mA hg 的比容量。 ？1 分别以0.1、0.2、0.5、1.0和2.0C的速率进行;此外，每种速率经过100个循环后，它们仍能很好地保持其性能。这些具有优异性能的固体状凝胶聚合物电解质膜代表了一种具有改善的安全性和可靠性的高性能锂离子电池非常有前途的材料。

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