共混聚合物单离子导体的导电性与传质机理研究

Conductivity and Ionic Transport Mechanism of Blends Single-ion Conductor

本文研究了聚甲基丙烯酸乙基磺酸锂/聚(甲基丙烯酸齐聚氧化乙烯醋一丙烯酰胺)/二甲基多缩乙二醇共混聚合物单离子导体导电性和传质机理。用极化反转法测定了共混物的离子淌度。在25℃,该共混物单离子导体电导率和锂离子淌度分别为5.2×10^(-6)s·cm^(-1)和3.0×10^(-8)cm^2·V^(-1)·s^(-1)。由离子淌度计算得到50℃时锂离子扩散系数和迁移数分别为4.2×10^(-9)cm^2·s^(-1)和0.994。实验结果证实该共混物是一种单阳离子导体,是通过热活化跳跃机制完成阳离子传质过程的.

The conductivity and ionic transport mechanism of poly (lithium sulfohexyl methacrylate) and poly(oligo(oxyethylene) methacrylate-co-acrylamide) blends were studied. The Li^+ ionic mobility of the singleion conductor was obtained by means of the bias polarization reverse method. The conductivity and Li^+ ionic mobility were 5.2× 10^(-6)s·cm^(-1) and 3.0×10^(-8) cm^2·V^(-1)·s^(-1)respectively at 25℃. The diffusion coefficient and Li^+ ionic transport number calculated from ionic mobility were 4.2×10^(-9)cm^2·s^(-1)and0.994 respectively at 50℃. The results confiomed that the blends is a single-cation conductor and cationic transport is realized with heatactivable jump mechanism.