Abstract The chemical cross-linking of epoxy resin has been known as an imperative way to improve the mechanical strength and thermal stability of solid polymer electrolytes (SPEs). Herein, we prepare flexible epoxy-based SPEs with high ion conductivity for electrochemical devices via ring-opening polymerization. A diglycidyl ether of bisphenol-A (DGEBA) epoxy resin was selected as the mechanical supporting SPE matrix. The high flexibility of SPEs can be obtained by adding poly(ethylene glycol) diglycidyl ether (PEGDE) plasticizer to the epoxy resin. Furthermore, the incorporation of electrolyte mixture of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salts and 1-butyl-3 methylimidazolium bis(trifluorosulfonyl)imide (BMIM-TFSI) ionic liquids allows for boosting ionic conductivity of the epoxy-based SPEs. Consequently, the high room temperature ionic conductivity ∼2.4 × 10−3 S/cm was achieved in the SPE containing 30 wt% of the epoxy and 70 wt% of the electrolyte mixture.

中文翻译：

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开环聚合制备柔性高离子导电聚合物电解质

摘要 环氧树脂的化学交联被认为是提高固体聚合物电解质（SPEs）机械强度和热稳定性的必要途径。在此，我们通过开环聚合制备了用于电化学装置的具有高离子电导率的柔性环氧基 SPE。选择双酚 A (DGEBA) 环氧树脂的二缩水甘油醚作为机械支撑 SPE 基质。通过在环氧树脂中加入聚乙二醇二缩水甘油醚 (PEGDE) 增塑剂可以获得 SPE 的高柔韧性。此外，加入双（三氟甲磺酰基）亚胺锂（LiTFSI）盐和 1-丁基-3 甲基咪唑鎓双（三氟磺酰基）亚胺（BMIM-TFSI）离子液体的电解质混合物可以提高环氧基 SPE 的离子电导率。最后，