Aziz Shujahadeen B, Nofal Muaffaq M, Kadir M F Z, Dannoun Elham M A, Brza Mohamad A, Hadi Jihad M, Abdullah Ranjdar M
Hameed Majid Advanced Polymeric Materials Research Lab., Physics Department, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Iraq.
Department of Civil Engineering, College of Engineering, Komar University of Science and Technology, Sulaimani 46001, Iraq.
Materials (Basel). 2021 Apr 16;14(8):1994. doi: 10.3390/ma14081994.
This report shows a simple solution cast methodology to prepare plasticized polyvinyl alcohol (PVA)/methylcellulose (MC)-ammonium iodide (NHI) electrolyte at room temperature. The maximum conducting membrane has a conductivity of 3.21 × 10 S/cm. It is shown that the number density, mobility and diffusion coefficient of ions are enhanced by increasing the glycerol. A number of electric and electrochemical properties of the electrolyte-impedance, dielectric properties, transference numbers, potential window, energy density, specific capacitance () and power density-were determined. From the determined electric and electrochemical properties, it is shown that PVA: MC-NHI proton conducting polymer electrolyte (PE) is adequate for utilization in energy storage device (ESD). The decrease of charge transfer resistance with increasing plasticizer was observed from Bode plot. The analysis of dielectric properties has indicated that the plasticizer is a novel approach to increase the number of charge carriers. The electron and ion transference numbers were found. From the linear sweep voltammetry (LSV) response, the breakdown voltage of the electrolyte is determined. From Galvanostatic charge-discharge (GCD) measurement, the calculated values are found to drop with increasing the number of cycles. The increment of internal resistance is shown by equivalent series resistance () plot. The energy and power density were studied over 250 cycles that results to the value of 5.38-3.59 Wh/kg and 757.58-347.22 W/kg, respectively.
本报告展示了一种在室温下制备增塑聚乙烯醇（PVA）/甲基纤维素（MC）-碘化铵（NHI）电解质的简单溶液浇铸方法。最大导电膜的电导率为3.21×10 S/cm。结果表明，通过增加甘油可提高离子的数密度、迁移率和扩散系数。测定了电解质的许多电学和电化学性质——阻抗、介电性质、迁移数、电位窗口、能量密度、比电容（）和功率密度。根据所测定的电学和电化学性质，表明PVA:MC-NHI质子传导聚合物电解质（PE）适用于储能装置（ESD）。从波特图观察到，随着增塑剂含量增加，电荷转移电阻降低。介电性质分析表明，增塑剂是增加载流子数量的一种新方法。确定了电子和离子迁移数。根据线性扫描伏安法（LSV）响应，测定了电解质的击穿电压。通过恒电流充放电（GCD）测量发现，计算得到的 值随着循环次数增加而下降。等效串联电阻（）图显示了内阻的增加。在250个循环中研究了能量和功率密度，结果分别得到5.38 - 3.59 Wh/kg和757.58 - 347.22 W/kg的值。
