Aziz Shujahadeen B, M Hadi Jihad, Dannoun Elham M A, Abdulwahid Rebar T, R Saeed Salah, Shahab Marf Ayub, Karim Wrya O, Kadir Mohd F Z
Hameed Majid Advanced Polymeric Materials Research Laboratory, Department of Physics, College of Science, University of Sulaimani, Qlyasan Street, Kurdistan Regional Government, Sulaimani 46001, Iraq.
Department of Civil Engineering, College of Engineering, Komar University of Science and Technology, Kurdistan Regional Government, Sulaimani 46001, Iraq.
Polymers (Basel). 2020 Aug 27;12(9):1938. doi: 10.3390/polym12091938.
In this study, plasticized films of polyvinyl alcohol (PVA): chitosan (CS) based electrolyte impregnated with ammonium thiocyanate (NHSCN) were successfully prepared using a solution-casting technique. The structural features of the electrolyte films were investigated through the X-ray diffraction (XRD) pattern. The enrichment of the amorphous phase with increasing glycerol concentration was confirmed by observing broad humps. The electrical impedance spectroscopy (EIS) portrays the improvement of ionic conductivity from 10 S/cm to 10 S/cm upon the addition of plasticizer. The electrolytes incorporated with 28 wt.% and 42 wt.% of glycerol were observed to be mainly ionic conductor as the ionic transference number measurement (TNM) was found to be 0.97 and 0.989, respectively. The linear sweep voltammetry (LSV) investigation indicates that the maximum conducting sample is stable up to 2 V. An electrolyte with the highest conductivity was used to make an energy storage electrical double-layer capacitor (EDLC) device. The cyclic voltammetry (CV) plot depicts no distinguishable peaks in the polarization curve, which means no redox reaction has occurred at the electrode/electrolyte interface. The fabricated EDLC displays the initial specific capacitance, equivalent series resistance, energy density, and power density of 35.5 F/g, 65 Ω, 4.9 Wh/kg, and 399 W/kg, respectively.
在本研究中，采用溶液浇铸技术成功制备了浸渍有硫氰酸铵（NHSCN）的聚乙烯醇（PVA）：壳聚糖（CS）基增塑电解质薄膜。通过X射线衍射（XRD）图谱研究了电解质薄膜的结构特征。通过观察宽峰证实了随着甘油浓度增加非晶相的富集。电化学阻抗谱（EIS）表明，添加增塑剂后离子电导率从10⁻⁶ S/cm提高到10⁻³ S/cm。当离子迁移数测量（TNM）分别为0.97和0.989时，观察到含有28 wt.%和42 wt.%甘油的电解质主要是离子导体。线性扫描伏安法（LSV）研究表明，导电性最高的样品在高达2 V时是稳定的。使用导电性最高的电解质制作了一个储能双电层电容器（EDLC）器件。循环伏安法（CV）曲线在极化曲线上没有明显的峰，这意味着在电极/电解质界面没有发生氧化还原反应。制备的EDLC的初始比电容、等效串联电阻、能量密度和功率密度分别为35.5 F/g、65 Ω、4.9 Wh/kg和399 W/kg。
