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通过溶液浇注法制备了一种polymer in salt型PVA KOH H2O聚合物电解质.对该电解质进行了X射线衍射、热性质及电化学性质测试与分析.X射线衍射显示PVA和KOH在聚合物电解质中均以非晶态存在.随着KOH含量的增加,聚合物的玻璃转化点温度逐渐上升,而电解质电导率也随之增加.该电解质的电化学窗口可达1.4V,阻抗测试显示当电解质组成PVA/KOH为1/3(质量比)时,室温电导率可达0.15S/cm,电导率与温度关系符合Arrhenius方程.该电解质热力学稳定性好,机械强度高、电化学性质优越.
A polymer in salt type PVA KOH H2O polymer electrolyte was prepared by solution casting.The XRD, thermal and electrochemical properties of the electrolyte were tested and analyzed.X-ray diffraction showed that PVA and KOH were in the polymer electrolyte With the KOH content increased, the polymer glass transition point temperature gradually increased, while the electrolyte conductivity also increased.The electrolyte electrochemical window up to 1.4V, the impedance test showed that when the electrolyte composition When PVA / KOH is 1/3 (mass ratio), the conductivity at room temperature can reach 0.15S / cm, and the conductivity is in accordance with the Arrhenius equation with temperature.The electrolyte has good thermodynamic stability, high mechanical strength and excellent electrochemical properties.