Abstract High performance electric double-layer capacitors (EDLCs) based on poly (vinyl alcohol) (PVA): ammonium thiocyanate (NH4SCN):Cu(II)-complex plasticized with glycerol (GLY) have been fabricated. The maximum DC ionic conductivity (σDC) of 2.25 × 10-3 S cm−1 is achieved at ambient temperature. The X-ray diffraction (XRD) patterns confirmed that the addition of both Cu(II)–complex and GLY enhanced the amorphous region within the samples. Through the Fourier transform infrared (FTIR) the interactions between the host polymer and other components of the prepared electrolyte are observed. The FESEM images reveal that the surface morphology of the samples showed a uniform smooth surface at high GLY concentration. This is in good agreement with the XRD and FTIR results. Transference numbers of ion (tion) and electron (tel) for the highest conducting composite polymer electrolyte (CPE) are recognized to be 0.971 and 0.029, respectively. The linear sweep voltammetry (LSV) revealed that the electrochemical stability window for the CPE is 2.15 V. These high values of tion and potential stability established the suitability of the synthesized systems for EDLC application. Cyclic voltammetry (CV) offered nearly rectangular shape with the lack of Faradaic peak. The specific capacitance and energy density of the EDLC are nearly constant within 1000 cycles at a current density of 0.5 mA/cm2 with average of 155.322F/g and 17.473 Wh/Kg, respectively. The energy density of the EDLC in the current work is in the range of battery specific energy. The EDLC performance was found to be stable over 1000 cycles. The low value of equivalent series resistance reveals that the EDLC has good electrolyte-electrode contact. The EDLC exhibited the initial high power density of 4.960 × 103 W/Kg.

中文翻译：

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金属骨架作为使用增塑聚（乙烯醇）制备高能量密度双电层电容器装置的新方法：硫氰酸铵基聚合物电解质

摘要 已经制备了基于聚乙烯醇 (PVA): 硫氰酸铵 (NH4SCN):Cu(II)-用甘油 (GLY) 增塑的复合物的高性能双电层电容器 (EDLC)。在环境温度下实现了 2.25 × 10-3 S cm-1 的最大直流离子电导率 (σDC)。X 射线衍射 (XRD) 图案证实，Cu(II)-络合物和 GLY 的添加增强了样品内的非晶区。通过傅里叶变换红外 (FTIR) 观察主体聚合物与制备的电解质的其他组分之间的相互作用。FESEM 图像显示样品的表面形态在高 GLY 浓度下显示出均匀的光滑表面。这与 XRD 和 FTIR 结果非常吻合。最高导电复合聚合物电解质 (CPE) 的离子 (tion) 和电子 (tel) 转移数分别为 0.971 和 0.029。线性扫描伏安法 (LSV) 显示 CPE 的电化学稳定性窗口为 2.15 V。这些高值和电位稳定性确定了合成系统适用于 EDLC 应用。循环伏安法 (CV) 提供近乎矩形的形状，没有法拉第峰。EDLC 的比电容和能量密度在 0.5 mA/cm2 的电流密度下在 1000 次循环内几乎恒定，平均分别为 155.322F/g 和 17.473 Wh/Kg。目前工作中EDLC的能量密度在电池比能量范围内。发现 EDLC 性能稳定超过 1000 次循环。等效串联电阻的低值表明 EDLC 具有良好的电解质 - 电极接触。EDLC 的初始高功率密度为 4.960 × 103 W/Kg。