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Flexible, Self-Healing, and Fire-Resistant Polymer Electrolytes Fabricated via Photopolymerization for All-Solid-State Lithium Metal Batteries
journal contribution
posted on 2020-03-23, 12:40 authored by Binghua Zhou, Mengling Yang, Cai Zuo, Gong Chen, Dan He, Xingping Zhou, Chengmei Liu, Xiaolin Xie, Zhigang XueThe
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.
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PEGMALi anodes showpolymer electrolyteAll-Solid-State Lithium Metal Batteriescross-linking structureHCPCPSHPEmultifunctional polymer electrolytecyclophosphazene-based self-healing polymer electrolytescyclotriphosphazeneUVpolymer lithium batterieslithium metal batteriesLFPFire-Resistant Polymer Electrolytes Fabricatedmethyl ether methacrylate
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