Abstract CuBTC-Metal-Organic Framework (MOF) has been prepared by solvothermal synthesis method and ionic liquid (IL) 1-butyl-3 methylimidazolium tetrafluoroborate (BMIMBF4) has been incorporated at different wt% into the CuBTC-MOF. The composite nanofiller has been dispersed in poly (vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP) polymer electrolyte system. Shifting of FTIR vibrational modes of carboxylate group is due to metal-ligand bond elongation upon interaction of ions of IL with CuBTC-MOF. The binding energy of Cu spin-orbit peak increases with incorporation of IL as obtained from XPS spectra suggesting motion of BF4− anions of IL towards the Cu metal nodes of MOF. Periodic oscillation and coordination structure of Cu K-edge are observed in k-space and R-space scanning EXAFS data. Non-Debye dielectric relaxation dynamics is observed from dielectric permittivity and modulus spectra with ionic conductivity of 8.7 × 10−3 Scm−1at 50 wt% of IL incorporation in the composite polymer electrolyte at 380 K. The electrochemical stability profile increases with increasing IL concentration and attains 6.1 V at 50 wt% of IL.

中文翻译：

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探索离子液体中的离子传输动力学，并结合基于 CuBTC-金属-有机框架的 PVdF-HFP 纳米复合膜

摘要 通过溶剂热合成法制备了 CuBTC-金属有机骨架 (MOF)，并将离子液体 (IL) 1-丁基-3 甲基咪唑四氟硼酸盐 (BMIMBF4) 以不同重量百分比掺入 CuBTC-MOF 中。复合纳米填料已分散在聚（偏二氟乙烯-共-六氟丙烯）（PVdF-HFP）聚合物电解质体系中。羧酸盐基团的 FTIR 振动模式的转变是由于 IL 离子与 CuBTC-MOF 相互作用时金属-配体键的伸长所致。从 XPS 光谱获得的 Cu 自旋轨道峰的结合能随着 IL 的掺入而增加，这表明 IL 的 BF4− 阴离子向 MOF 的 Cu 金属节点移动。在 k 空间和 R 空间扫描 EXAFS 数据中观察到 Cu K 边缘的周期性振荡和配位结构。