Nanocomposite polymer electrolytes based on poly(ethylene glycol) diacrylate and 1 M LiBF4 solution in γ-butyrolactone containing SiO2 nanoparticles were studied by FT IR spectroscopy. Quantum chemical modeling of five different solvate complexes of ions composed of LiBF4 with solvent molecules was carried out and their theoretical IR spectra were calculated. The compositions of the solvate complexes of LiBF4 in the nanocomposite gel electrolyte were studied by comparing the experimental and theoretical IR spectra. It was concluded that the conductivity peak observed upon adding 2 wt.% SiO2 is due to the appearance of mobile ions as a consequence of ionic dissociation on the surface of nanoparticles at their optimal configuration.

中文翻译：

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纳米复合聚合物凝胶电解质的电导率增加效应：在红外光谱中的表现

通过 FT IR 光谱研究了基于聚（乙二醇）二丙烯酸酯和 1 M LiBF4 溶液在含有 SiO2 纳米粒子的 γ-丁内酯中的纳米复合聚合物电解质。对由 LiBF4 与溶剂分子组成的五种不同的离子溶剂化物络合物进行了量子化学建模，并计算了它们的理论红外光谱。通过比较实验和理论红外光谱，研究了纳米复合凝胶电解质中 LiBF4 溶剂合物的组成。得出的结论是，在添加 2 wt.% SiO2 时观察到的电导率峰是由于在纳米粒子的最佳配置下表面离子解离导致移动离子的出现。