The Study of the Degree of Crystallinity, Electrical Equivalent Circuit, and Dielectric Properties of Polyvinyl Alcohol (PVA)-Based Biopolymer Electrolytes.
The Study of the Degree of Crystallinity, Electrical Equivalent Circuit, and Dielectric Properties of Polyvinyl Alcohol (PVA)-Based Biopolymer Electrolytes.
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聚乙烯醇（PVA）基生物聚合物电解质结晶度、等效电路和介电性能的研究。
DOI：
10.3390/polym12102184
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发表时间：
2020-09-24
期刊：
影响因子：
5
通讯作者：
Abdullah RM
中科院分区：
文献类型：
--
作者：
B Aziz S;S Marf A;Dannoun EMA;Brza MA;Abdullah RM
本报告提出了一种简单有效的方法，用于制造塑化聚乙烯醇（PVA）：壳聚糖（CS）聚合物电解质使用的溶液浇铸技术。对于电性能和结构行为的表征，分别使用电化学阻抗谱（EIS）和X射线衍射（XRD）。结晶峰出现在PVA：CS：NH 4 I的XRD图中，而在增塑体系的XRD图中看不到峰。从结晶相和非晶相的去卷积面积计算所有样品的结晶度。考虑到EIS测量，最导电的增塑体系显示出相对较高的电导率（1.37 × 10−4）S/cm，这符合储能装置的应用条件。EIS谱的分析揭示了体电阻的降低，这表明自由离子载流子的增加。在EIS图的分析中使用了电气等效电路（EEC）模型。介电性能通过添加甘油作为增塑剂而改变。证明了甘油作为增塑剂的加入降低了离子缔合。它还示出，在低频区域，与电极极化（EP）相关的介电常数的大值。弛豫时间的分布与导电离子有关。
This report presents a facile and efficient methodology for the fabrication of plasticized polyvinyl alcohol (PVA):chitosan (CS) polymer electrolytes using a solution cast technique. Regarding characterizations of electrical properties and structural behavior, the electrochemical impedance spectroscopy (EIS) and X-ray diffraction (XRD) are used, respectively. Crystalline peaks appear in the XRD pattern of the PVA:CS:NH4I while no peaks can be seen in the XRD pattern of plasticized systems. The degree of crystallinity is calculated for all the samples from the deconvoluted area of crystalline and amorphous phases. Considering the EIS measurements, the most conductive plasticized system shows a relatively high conductivity of (1.37 × 10−4) S/cm, which is eligible for applications in energy storage devices. The analysis of the EIS spectra reveals a decrease in bulk resistance which indicates an increase in free ion carriers. The electrical equivalent circuit (EEC) model is used in the analysis of EIS plots. Dielectric properties are modified with the addition of glycerol as a plasticizer. It is proved that the addition of glycerol as a plasticizer lowers ion association. It also shows, at the low-frequency region, a large value of a dielectric constant which is correlated with electrode polarization (EP). The distribution of relaxation times is associated with conducting ions.
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影响因子：
4.6
作者：
Aziz, Shujahadeen B.;Hamsan, M. H.;Kadir, M. F. Z.
通讯作者：
Kadir, M. F. Z.
影响因子：
5
作者：
Aziz, Shujahadeen B.;Hamsan, Muhamad H.;Al-Zangana, Shakhawan
通讯作者：
Al-Zangana, Shakhawan
影响因子：
5
作者：
Aziz, Shujahadeen B.;Hamsan, Muhamad H.;Kadir, Mohd F. Z.
通讯作者：
Kadir, Mohd F. Z.
影响因子：
--
作者：
Aziz, Shujahadeen B.
通讯作者：
Aziz, Shujahadeen B.
DOI：
10.1016/j.jmrt.2020.02.097
发表时间：
2020-05-01
影响因子：
6.4
作者：
Aziz, Shujahadeen B.;Karim, Wrya O.;Ghareeb, Hewa O.
通讯作者：
Ghareeb, Hewa O.