Polyvinylidene fluoride (PVDF) was used as a membrane matrix, and then many groups of experiments with different additives were carried out to investigate the factor that affects conductivity of the solid polymer electrolyte (SPE). Impedance measurements were performed using an electrochemical work station. Data obtained through alternating current (AC) impedance measurements revealed that the conductivity of the blending membrane was improved. The presence of hydroxyl end-groups and some electron-donating groups in the additives was helpful for increasing the conductivity. In particular, when PVP and EDTA were added, the conductivity of the polymer electrolyte could achieve a value of 7.19 × 10⁻⁴ S cm⁻¹ at 25 °C and a lithium ion transference number of 0.49. The electrochemical stability window was about 4.3 V (vs. Li⁺/Li).

中文翻译：

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PVDF基固体聚合物电解质中添加剂对电导率和锂离子电池性能的影响

以聚偏二氟乙烯（PVDF）为膜基质，然后进行了多组使用不同添加剂的实验，以研究影响固体高分子电解质（SPE）电导率的因素。使用电化学工作站进行阻抗测量。通过交流（AC）阻抗测量获得的数据表明，共混膜的电导率得到了改善。添加剂中存在羟基端基和一些供电子基团有助于提高电导率。特别地，当添加PVP和EDTA时，聚合物电解质的电导率可达到7.19×10 ^-4 S cm ^-1的值。在25°C和锂离子转移数为0.49的条件下。电化学稳定性窗口为约4.3V（相对于Li ⁺ / Li）。