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首页> 外文期刊>Physica Status Solidi. C, Conferences and critical reviews >Thermal and transport properties of the polymer electrolyte based on poly(vinyl alcohol)-LiOH-H_2O
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Thermal and transport properties of the polymer electrolyte based on poly(vinyl alcohol)-LiOH-H_2O

机译：基于聚乙烯醇-LiOH-H_2O的高分子电解质的热输运性质

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摘要

Solid polymer electrolytes consisting of poly(ethylene oxide) PEO and lithium trifluroacetate (CF_3COOLi) with various salt mass fractions were prepared by the solvent casting method using acetonitrile. Temperature and concentration dependent impedance spectroscopy, as well as thermal analysis suggest the existence of a complex in the blends with an EO/Li ratio corresponding roughly to 4:1. The dc conductivity (σ_0) of the blends were very sensitive to the temperature (T) and their salt mass fraction (x), showing values in the range of 10-5 to 10-2 (S cm~(-1)) at 330 K as the salt concentration was increased. The enhancement of conductivity with increasing temperature (5 orders of magnitude when the temperature changes from 300 to 353 K) was attributed to the high mobility of the Li~+ ions as a consequence of the chain polymer flexibility and the increase of the free volume for ionic migration.
机译：通过使用乙腈的溶剂流延法制备由聚（环氧乙烷）PEO和具有不同盐质量分数的三氟乙酸锂（CF_3COOLi）组成的固体聚合物电解质。与温度和浓度有关的阻抗谱以及热分析表明，共混物中存在一种复合物，其EO / Li比大致相当于4：1。共混物的直流电导率（σ_0）对温度（T）及其盐质量分数（x）非常敏感，显示在10-5至10-2（S cm〜（-1））范围内的值随着盐浓度的增加330K。电导率随温度升高而增加（当温度从300变为353 K时，升高了5个数量级），这归因于链型聚合物的柔性和锂离子自由体积的增加，Li〜+离子迁移率高。离子迁移。

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