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首页> 外文期刊>Journal of Applied Polymer Science >Ion-transport study in nanocomposite solid polymer electrolytes based on chitosan: Electrical and dielectric analysis
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Ion-transport study in nanocomposite solid polymer electrolytes based on chitosan: Electrical and dielectric analysis

机译：基于壳聚糖的纳米复合固体聚合物电解质的离子迁移研究：电学和介电分析

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In this study, (1.1111 - x)(0.9CS-0.1NaTf)-xAl(2)O(3)(0.02 <= x <= 0.1) [where CS is chitosan, NaTf is sodium triflate (NaCF3SO3), and Al2O3 is aluminum oxide] nanocomposite solid polymer electrolyte (SPE) films based on CS were prepared by a solution casting technique. X-ray diffraction and scanning electron microscopy analysis revealed that the alumina nanoparticles had a great effect on the structural and morphological behavior of the CS-NaTf (90:10) polymer electrolyte. An investigation of the electrical and dielectric parameters of the nanocomposite SPE films was conducted. Electrical impedance spectroscopy was carried out for this purpose. The relationships between the electrical and dielectric parameters were used to interpret and understand the ion-conduction mechanism. We observed that the direct-current conductivity (sigma(dc)) and dielectric constant followed the same trend with salt concentration. sigma(dc) versus temperature showed the Arrhenius and Vogel-Fulcher-Tammann (VTF) regions. The drops of sigma(dc) at high temperatures were observed for all of the samples. The ion relaxation dynamics were studied from Argand plots. For the first time, we confirmed the existence of a strong experimental relationship between the high-frequency semicircle of the impedance plots and the high-frequency dispersion regions of the alternating-current conductivity (sigma(ac)). The dispersion regions of sigma(ac) were used to study the ion-conduction mechanism. The behavior of the frequency exponent as a function of the temperature was used to interpret sigma(dc) versus the temperature. (C) 2014 Wiley Periodicals, Inc.
机译：在这项研究中，（1.1111-x）（0.9CS-0.1NaTf）-xAl（2）O（3）（0.02 <= x <= 0.1）[其中CS是壳聚糖，NaTf是三氟甲磺酸钠（NaCF3SO3），Al2O3通过溶液流延技术制备了基于CS的氧化铝]纳米复合固体聚合物电解质（SPE）薄膜。 X射线衍射和扫描电子显微镜分析表明，氧化铝纳米粒子对CS-NaTf（90:10）聚合物电解质的结构和形态行为有很大影响。对纳米复合材料固相萃取膜的电和介电参数进行了研究。为此目的进行了电阻抗光谱法。电和介电参数之间的关系用于解释和理解离子传导机理。我们观察到直流电导率（sigma（dc））和介电常数在盐浓度下遵循相同的趋势。 sigma（dc）与温度的关系曲线显示了Arrhenius和Vogel-Fulcher-Tammann（VTF）区域。对于所有样品，在高温下都观察到σ（dc）的下降。从Argand图研究了离子弛豫动力学。我们首次确认阻抗图的高频半圆与交流电导率的高频色散区域（sigma（ac））之间存在很强的实验关系。 σ（ac）的分散区域用于研究离子传导机理。频率指数随温度变化的行为被用来解释sigma（dc）与温度的关系。 （C）2014威利期刊公司

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