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首页> 外文期刊>Ionics >FTIR and rheological studies of PMMA-based nano-dispersed gel polymer electrolytes incorporated with LiBF4 and SiO2
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FTIR and rheological studies of PMMA-based nano-dispersed gel polymer electrolytes incorporated with LiBF4 and SiO2

机译：PMMA的基于PMMA的纳米分散凝胶聚合物电解质的FTIR和流变研究，其掺入LiBF4和SiO2

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Gel polymer electrolytes (GPEs) were prepared by dissolving lithium tetrafluoroborate (LiBF4) salt, poly(methylmethacrylate) (PMMA) polymer and distinct non-volatile solvents propylene carbonate (PC), and -N,N-dimethylformamide (DMF) in single as well as binary solvent mixtures. Ionic conductivities of 8.93mS/cm and 6.68mS/cm at 25 degrees C have been obtained for gel polymer electrolytes for 10wt% PMMA in the solution of LiBF4 in binary solvent mixture of PC:DMF in (1:1) and (2:1) volume ratios respectively. The dispersion of nano-sized silica in gel polymer electrolyte not only exhibits small change in ionic conductivity but also enhances the mechanical strength as well as viscosity of gel polymer electrolytes. At room temperature, the ionic conductivity has been found to be 8.00mS/cm for 6wt% nano-sized silica in GPEs. Fourier-transform infrared (FTIR) spectroscopic studies have been used to scrutinize the corroboration of the complexation between PMMA, LiBF4, PC, DMF, PC:DMF, and SiO2. The interactions between salt and solvents in liquid electrolytes have also been analyzed by FTIR spectroscopy illustrating the strong interaction between lithium salt and solvent molecules. The appearance/disappearance and shifting of some peaks confirm the interaction among the constituents of nano-dispersed gel polymer electrolytes. The mechanical strength was confirmed by dynamic mechanical analysis (DMA) and viscosity [(PC:DMF (2:1))>(PC:DMF (1:1))>(PC)] for nano-dispersed silica-based gel polymer electrolytes. The electrical and mechanical stability with high ionic conductivity for such gel polymer electrolytes makes these electrolytes suitable for many device applications like high energy density lithium-ion batteries, super-capacitors, electro-chromic devices etc.
机译：通过将锂四氟硼酸锂（Libf4）盐，聚（甲基丙烯酸甲酯）聚合物和不同的非挥发性溶剂丙烯碳酸亚碳酸亚碳酸酯（PC）和-N，N-二甲基甲酰胺（DMF）单独，制备凝胶聚合物电解质电解质（GPE）。以及二元溶剂混合物。已经在PC的二元溶剂混合物的二元溶剂混合物溶液中获得10wt％PMMA的10wt％PMMA的离子电导率为8.93ms / cm和6.68ms / cm。（1：1）和（2： 1）分别的体积比。纳米尺寸二氧化硅在凝胶聚合物电解质中的分散不仅表现出离子导电性的小变化，而且还提高了凝胶聚合物电解质的机械强度以及粘度。在室温下，已发现离子电导率为8.00ms / cm，对于GPE中的6wt％纳米尺寸二氧化硅。傅里叶变换红外（FTIR）光谱研究已被用于仔细审查PMMA，LibF4，PC，DMF，PC：DMF和SiO2之间的络合络合的腐蚀性。通过FTIR光谱法分析了液体电解质中盐和溶剂之间的相互作用，说明了锂盐和溶剂分子之间的强相互作用。一些峰的外观/消失和移位确认了纳米分散的凝胶聚合物电解质的成分之间的相互作用。通过动态机械分析（DMA）和粘度来确认机械强度[（PC：DMF（2：1））>（PC：DMF（1：1））>（PC）]用于纳米分散的二氧化硅基凝胶聚合物电解质。具有高离子电导率的这种凝胶聚合物电解质的电气和机械稳定性使得这些电解质适用于许多设备应用，如高能量密度锂离子电池，超级电容器，电铬装置等。

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