【摘要】 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。更多还原

【Abstract】 Organic-modified rectorite/poly (methyl methacrylate)(OREC/PMMA) gel polymer electrolyte, which is a nanocomposite gel polymer electrolyte (NGPE), was synthesized through in situ polymerization with free radical initiator in a solution with an or- ganic plasticizer propylene carbonate (PC) as solvent. The electrical property of the NGPE was determined by the AC impedance. The interaction between the constituents in the NGPE was investigated by infrared spectroscopy. The thermal stability of the gel system was studied by differential scanning calorimetry and thermo-gravimetric analysis. The results show that the bulk impedance of the OREC/PMMA gel electrolyte decreases first and then increases with the increase of the OREC content. There is a maximum value of ionic conductivity for OREC/PMMA with 5% in mass OREC under different temperatures. There are reactions between OREC and PC, PMMA and LiClO4. The mechanism of the increase of conductivity of the OREC/PMMA gel electrolyte by adding OREC is dis- cussed. The addition of OREC can enhance the thermal stability of the gel electrolyte.更多还原