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以有机增塑剂聚碳酸丙烯酯(propylene carbonate,PC)为聚合反应溶剂,通过自由基引发原位聚合法制备了有机累托石/聚甲基丙烯酸甲酯(organic-modified rectorite /polymethyl methacrylate,OREC/PMMA)纳米复合凝胶聚合物电解质(nanocomposite gel polymer electrolyte, NGPE)。用交流阻抗法分析了凝胶电解质的电性能,并研究了温度对电性能的影响。通过红外光谱分析其组分间的相互作用。用差示扫描量热分析和热失重分析分析凝胶电解质的热稳定性。结果表明:OREC/PMMA 组成的 NGPE 的本体阻抗值随 OREC 添加量的增加呈现出先减小后增大的趋势,当 OREC 的添加质量为 5%时,NGPE 在不同温度下均具有最大的离子电导率(σ)。OREC 与 PC,PMMA 及锂盐之间存在一定的相互作用,从结构的角度解释了 OREC添加提高体系σ的机理。添加 OREC 能在一定程度上改善体系的凝胶热稳定性。
Organic-modified rectorite / polymethyl methacrylate (PMMA) was prepared by free radical initiated in-situ polymerization using organic carbonate plasticizer (PC) as polymerization solvent. OREC / PMMA) nanocomposite gel polymer electrolyte (NGPE). The electrical properties of the gel electrolyte were analyzed by AC impedance method and the effect of temperature on the electrical properties was also studied. Analysis of the interaction between its components by infrared spectroscopy. The thermal stability of the gel electrolyte was analyzed by differential scanning calorimetry and thermogravimetric analysis. The results showed that the bulk impedance of NGPE composed of OREC / PMMA decreased first and then increased with the increase of OREC content. When the addition mass of OREC was 5%, NGPE had the highest ionic conductivity at different temperatures Rate (σ). There is a certain interaction between OREC and PC, PMMA and lithium salts, and the mechanism of OREC addition and improvement of system σ is explained from the structural point of view. Adding OREC can improve the gel thermal stability of the system to a certain extent.