In the present study, a magnesium ion conducting polymer electrolyte membrane system based on polyethylene oxide (PEO) containing magnesium triflate Mg(CF₃SO₃)₂ salt and 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIM-BF₄) ionic liquid is prepared using standard solution casting technique. X-ray diffraction and differential scanning calorimetry studies reveal change in crystalline character with variation in Mg(CF₃SO₃)₂ concentration within PEMs. Fourier transform infrared spectroscopy technique reflects ion-polymer interactions within the prepared polymer electrolyte system. Dielectric and modulus properties of prepared electrolyte membranes show significant changes in dielectric constant and relaxation behavior respectively on varying Mg(CF₃SO₃)₂ concentration. The optimized polymer electrolyte membrane with 6 wt% of magnesium triflate salt shows maximum ionic conductivity of ~ 9.4 × 10⁻⁵ S cm⁻¹ at room temperature. The ionic conductivity variation with temperature shows Arrhenius behavior for PEMs. The Mg²⁺ conduction within the PEMs is established using CV study and electrochemical stability window of ~ 4.0 V is determined using linear sweep voltammetry. The PEMs are dominantly ionic conducting with Mg²⁺ transport number ~ 0.22 for the optimized PEM.

在本研究中，基于含三氟甲磺酸镁Mg（CF ₃ SO ₃）₂盐和1-乙基-3-甲基咪唑四氟硼酸（EMIM-BF ₄）离子液体的聚环氧乙烷（PEO）制成的镁离子导电聚合物电解质膜系统是使用标准溶液浇铸技术制备。X射线衍射和差示扫描量热法研究表明，随着Mg（CF ₃ SO ₃）_2的变化，晶体特性发生变化。PEM中的浓度。傅里叶变换红外光谱技术反映了制备的聚合物电解质体系中离子-聚合物的相互作用。制备的电解质膜的介电常数和模量性质分别显示出在改变Mg（CF ₃ SO ₃）₂浓度时介电常数和弛豫行为的显着变化。具有6 wt％的三氟甲磺酸镁盐的优化聚合物电解质膜在室温下显示约9.4×10 ^-5  S cm ^-1的最大离子电导率。离子电导率随温度的变化显示PEM的Arrhenius行为。镁²⁺通过CV研究确定PEM内部的导电性，并使用线性扫描伏安法确定〜4.0 V的电化学稳定性窗口。对于优化的PEM ，PEM占主导地位的离子导电性为Mg ²⁺传输数〜0.22。