Solid polymer electrolyte (SPE) based on poly(vinyl alcohol) (PVA) as a host polymer, sodium trifluoromethanesulfonate (NaTf) salt, and 1-butyl-3-methylimidazolium bromide (BmImBr) ionic liquid is fabricated using solution casting technique. The ionic conductivity, crystallinity, composition and thermal stability were characterized by electrochemical impedance spectroscopy (EIS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA), respectively. The optimum ratio between PVA and NaTf salt to obtain highest ionic conductivity was found to be as 60:40. The inclusion of BmImBr ionic liquid into the optimized PVA-based SPE significantly enhanced the ionic conductivity. XRD pattern indicated the successful dissolution of NaTf salt and complexation of BmImBr ionic liquid in the host polymer which has also been confirmed by FTIR spectra. The thermally stable SPE is suitable for electrical double layer capacitor (EDLC) application. The electrochemical studies of GPE for EDLC showed promising performance producing specific capacitance of 16.32 F g⁻¹.

使用溶液流延技术制备了以聚乙烯醇（PVA）为主体聚合物的固体聚合物电解质（SPE），三氟甲磺酸钠（NaTf）盐和1-丁基-3-甲基咪唑鎓溴化物（BmImBr）离子液体。分别通过电化学阻抗谱（EIS），X射线衍射（XRD），傅里叶变换红外光谱（FTIR）和热重分析（TGA）表征了离子电导率，结晶度，组成和热稳定性。为了获得最高的离子电导率，PVA和NaTf盐之间的最佳比例为60:40。在优化的基于PVA的SPE中加入BmImBr离子液体会显着增强离子电导率。XRD图谱表明NaTf盐的成功溶解和BmImBr离子液体在主体聚合物中的络合，这也已通过FTIR光谱证实。热稳定的SPE适用于双电层电容器（EDLC）应用。用于EDLC的GPE的电化学研究表明，其有希望的性能产生16.32 F g的比电容^-1。