The structural analysis of PVA/PAM blend polymer electrolytes made in the different ratio of 70: 30, 50: 50 and 30: 70 by ultrasound-assisted solution casting technique shows a good miscibility between the polymers. The different weight percentage of ammonium thiocyanate (NH₄SCN) salt as an ionic dopant was added to the PVA/PAM (50: 50) blend film and tested for the structural changes, electrical and electrochemical properties. The 50 wt% PVA-50 wt% PAM-20 wt% NH₄SCN (UN20) blend film prepared in the presence of ultrasound exhibits a high conductivity value of 1.66 × 10⁻⁴ S cm⁻¹, whereas the above blend membrane prepared in the absence of ultrasound (WN20) exhibits a conductivity value of 3.98 × 10⁻⁵ S cm⁻¹. The electric double–layer capacitor (EDLC) fabricated using the activated carbon as the electrode and the film UN20 as the polymer electrolyte exhibited a specific capacitance value of 1230 mF g⁻¹ as observed by the cyclic voltammetry studies, whereas the EDLC made with the film WN20 exhibited a poor specific capacitance value of 293 mF g⁻¹. The charge-discharge studies of the device made using the film UN20 was found to exhibit a first cycle discharge capacitance of 2562 mF g⁻¹ for a current load of 1 mA in the voltage range of 0–1 V. The reasons for the changes in the properties of the films prepared in presence and in absence of the ultrasound and its effect in performance of EDLC were discussed.

中文翻译：

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超声辅助溶液流延法制备PVA / PAM / NH 4 SCN聚合物薄膜及其在双电层电容器中的应用

通过超声辅助溶液流延技术以70：30、50：50和30:70的不同比例制备的PVA / PAM共混聚合物电解质的结构分析表明，聚合物之间具有良好的混溶性。将不同重量百分比的硫氰酸铵（NH ₄ SCN）盐作为离子掺杂剂添加到PVA / PAM（50：50）共混膜中，并测试其结构变化，电和电化学性能。在超声波存在下制备的50 wt％PVA-50 wt％PAM-20 wt％NH ₄ SCN（UN20）共混膜表现出1.66×10 ^-4  S cm ^-1的高电导率值，而上述共混膜在没有超声波（WN20）的情况下显示的电导值为3.98×10 ^-5  S cm^-1。循环伏安法研究发现，以活性炭为电极，以薄膜UN20为聚合物电解质制成的双电层电容器（EDLC）的比电容值为1230 mF g ^-1。膜WN20表现出差的293mF g ^-1的比电容值。研究发现，使用膜UN20制成的器件的充放电研究表明，在0–1 V的电压范围内，电流为1 mA时，其第一循环放电电容为2562 mF g ^-1。讨论了在有和没有超声波的情况下制备的薄膜的性能及其对EDLC性能的影响。