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首页> 外文期刊>Journal of Applied Polymer Science >Ionic conductivity and dielectric behavior of novel poly(vinyl formal)-based single-ion-conductor polymer electrolytes
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Ionic conductivity and dielectric behavior of novel poly(vinyl formal)-based single-ion-conductor polymer electrolytes

机译：新型基于聚乙烯醇缩甲醛的单离子导体聚合物电解质的离子电导率和介电性能

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摘要

Novel single-ion-conductor polymer (SCP) electrolytes based on oxalate-chelated-borate-structure-grafted poly(vinyl formal) (PVFM) were synthesized via a solution casting technique. The influence of the molar ratio of OH and boron atoms in PVFM on the ionic conductivity (sigma) of the SCP electrolytes at different temperatures was investigated with alternating-current impedance spectroscopy in the frequency range of 0.01Hz to 1 MHz. The results show that sigma of the SCP electrolytes at 15-60 degrees C was about 10(-6)-10(-5) S/cm, and temperature dependence of the conductivity of the electrolytes followed the Vogel-Tamman-Fulcher relationship. The dielectric behaviors of the SCP electrolytes were analyzed in view of the dielectric permittivity and dielectric modulus of the electrolytes. Dielectric analysis revealed that the transport of Li+ ions in the PVFM-based SCP electrolytes mainly followed a hopping mechanism coupled with the segmental motion of the polymer chain. Additionally, a dielectric relaxation was found in the high-frequency region; this was a thermally activated result and also implied the appearance of carrier hopping. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43510.
机译：通过溶液流延技术合成了基于草酸酯-螯合-硼酸酯结构接枝的聚（乙烯基甲醛）（PVFM）的新型单离子导电聚合物（SCP）电解质。通过交流阻抗谱在0.01Hz至1 MHz的频率范围内研究了PVFM中OH和硼原子的摩尔比对SCP电解质在不同温度下的离子电导率（sigma）的影响。结果表明，SCP电解质在15-60摄氏度时的sigma约为10（-6）-10（-5）S / cm，并且电解质电导率的温度依赖性遵循Vogel-Tamman-Fulcher关系。鉴于电解质的介电常数和介电模量，分析了SCP电解质的介电行为。介电分析表明，Li +离子在基于PVFM的SCP电解质中的传输主要遵循跳跃机制以及聚合物链的分段运动。另外，在高频区域发现介电弛豫。这是热激活的结果，也暗示了载流子跳变的出现。 （c）2016 Wiley Periodicals，Inc. J. Appl。 Polym。科学2016，133，43510。

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