A new flame-retardant polymer electrolyte with enhanced Li-ion conductivity for safe lithium-sulfur batteries

doi:10.1016/j.jechem.2021.06.036

Abstract

Abstract: Flame-retardant polymer electrolytes (FRSPEs) are attractive due to their potential for fundamentally settling the safety issues of liquid electrolytes. However, the current FRSPEs have introduced large quantity of flame-retardant composition which cannot conduct lithium ions, thus decreasing the Li-ion conductivity. Here, we synthesize a novel liquid monomer 2-((bis((2-oxo-1,3-dioxolan-4-yl) methoxy) phosphoryl) oxy) ethyl acrylate (BDPA) for preparing FRSPE by in-situ polymerization, in which PBDPA polymer can not only conduct lithium ions, but also prevent burning. The prepared FRSPE demonstrated outstanding flame-retardant property, favorable lithium-ion conductivity of 5.65 × 10^-4 S cm^-1 at ambient temperature, and a wide electrochemical window up to 4.5 V. Moreover, the Li/in-situ FRSPE/S@pPAN cell exhibited favorable electrochemical performances. We believe that this work provides an effective strategy for establishing high-performance fireproof quasi-solid-state battery system.

Key words: Polymer electrolyte, Flame-retardance, Lithium-ion conductivity, Lithium-sulfur battery

Hongping Li, Yixi Kuai, Jun Yang, Shin-ichi Hirano, Yanna Nuli, Jiulin Wang. A new flame-retardant polymer electrolyte with enhanced Li-ion conductivity for safe lithium-sulfur batteries[J]. Journal of Energy Chemistry, 2022, 65(2): 616-622.

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URL: https://www.jenergychem.com/EN/10.1016/j.jechem.2021.06.036

https://www.jenergychem.com/EN/Y2022/V65/I2/616

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