Abstract

In this work, we studied polymer electrolytes (PEs) that had the natural polymer chitosan as their matrix host. Different quantities of an ionic liquid that contains the lanthanide dysprosium as part of the anion, were incorporated in the chitosan matrix through the solvent casting method. The thermal, morphological and electrochemical properties of the membranes were accessed. The results, obtained by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM), force microscopy (AFM), and complex impedance spectroscopy, revealed a minimum thermal stability of about 139 °C; a predominantly amorphous morphology combined with the presence of small crystalline domains and a satisfactory ionic conductivity. The sample with the highest ionic conductivity was the chitosan₁[C₂mim][Dy(SCN)₄], (where 1 corresponds to the quotient between the mass of the polymer and the mass of the IL) which attained 6.76 × 10⁻⁶ S^.cm⁻¹ at 30 °C and 5.62 × 10⁻⁴ S^.cm⁻¹ at 100 °C. The results presented here suggest that these materials are promising and may find application in practical electrochemical devices.

中文翻译：

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with离子液体掺杂的壳聚糖聚合物电解质

摘要

在这项工作中，我们研究了以天然聚合物壳聚糖为基质基质的聚合物电解质（PE）。通过溶剂浇铸法将不同量的包含镧系作为阴离子一部分的离子液体掺入壳聚糖基质中。获得了膜的热，形态和电化学性质。通过热重分析（TGA），差示扫描量热法（DSC），X射线衍射（XRD），扫描电子显微镜（SEM），力显微镜（AFM）和复数阻抗谱获得的结果表明，热稳定性最低。约139°C; 主要为无定形形态，并伴有小晶域和令人满意的离子电导率。离子电导率最高的样品是壳聚糖₁ [C ₂ MIM] [镝（SCN）₄ ]（其中1个对应于聚合物的质量和IL的质量之间的商），其达到6.76×10 ^-6 小号^。cm ^-1在30°C和5.62×10 ^-4  S下^。在100°C下为^-1厘米。此处给出的结果表明这些材料是有前途的，并且可以在实际的电化学装置中找到应用。