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采用溶胶凝胶法,结合相转移法和碱液活化法制备了PVA/SiO2碱性微孔聚合物电解质,通过SEM、XRD、交流阻抗法和循环伏安法表征了电解质的结构与电化学性能.研究表明,PVA/5ωSiO2(ω为质量分数)共混膜上的微孔大小合适,聚合物电解质的离子电导率最大可达1.62×10-2 S cm-1,电化学稳定窗口2 V以上;将PVA/SiO2碱性微孔电解质组装成聚合物镁基镍氢电池,与传统镍氢电池相比,循环稳定性大大增加.
PVA / SiO2 basic microporous polymer electrolytes were prepared by sol-gel method, combined with phase-transfer method and alkaline activation method. The structure and electrochemical properties of the electrolytes were characterized by SEM, XRD, AC impedance and cyclic voltammetry The results show that the pore size of PVA / 5ωSiO2 (ω) is the best, the ionic conductivity of polymer electrolyte is up to 1.62 × 10-2 S cm-1 and the electrochemical stability window is above 2 V ; The PVA / SiO2 basic microporous electrolyte assembled into a polymer magnesium-based nickel-metal hydride batteries, compared with the traditional nickel-metal hydride batteries, the cycle stability greatly increased.