The cyclophosphazene-based self-healing polymer electrolytes (CPSHPE) is designed and fabricated via the copolymerization of hexa(4-ethyl acrylate phenoxy) cyclotriphosphazene (HCP), (2-(3-(6-methyl-4-oxo-1,4-dihydropyrimidin-2-yl)ureido)ethyl methacrylate) (UPyMA), and poly(ethylene glycol) methyl ether methacrylate (PEGMA) under UV irradiation. The cross-linking structure formed by HCP could effectively enhance the mechanical strength of the polymer electrolyte, and the cyclotriphosphazene as the core is able to improve the flame-retardant properties. Benefiting from the phenyl groups in HCP and the cross-linking structure, the CPSHPE shows high thermal stability (up to 300 °C). On the other hand, the supramolecular network fabricated by the dynamic ureido-pyrimidinone (UPy) dimers endows the polymer electrolyte with good self-healing capability and is expected to improve the reliability of polymer lithium batteries. Moreover, the cells were fabricated with LiFePO₄ (LFP), CPSHPE, and Li anodes show good reversible specific capacity. The CPSHPE could be a promising candidate as the multifunctional polymer electrolyte to improve the safety performance of lithium metal batteries.

中文翻译：

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用于全固态锂金属电池的通过光聚合制备的柔性、自愈和耐火聚合物电解质

基于环磷腈的自修复聚合物电解质（CPSHPE）是通过六（丙烯酸4-乙酯苯氧基）环三磷腈（HCP），（2-（3-（6-methyl-4-oxo-1， 4-二氢嘧啶-2-基）脲基）甲基丙烯酸乙酯）（UPyMA）和聚（乙二醇）甲基醚甲基丙烯酸酯（PEGMA）在紫外线照射下。HCP形成的交联结构可以有效提高聚合物电解质的机械强度，以环三磷腈为核心可以提高阻燃性能。得益于 HCP 中的苯基和交联结构，CPSHPE 显示出高热稳定性（高达 300 °C）。另一方面，由动态脲基嘧啶酮（UPy）二聚体制备的超分子网络赋予聚合物电解质良好的自愈能力，有望提高聚合物锂电池的可靠性。此外，这些电池是用 LiFePO 制造的₄（LFP）、CPSHPE和Li负极显示出良好的可逆比容量。CPSHPE 作为多功能聚合物电解质有望成为提高锂金属电池安全性能的候选材料。