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首页> 外文期刊>Journal of Polymers and the Environment >Conductivity of PEO/PLA Doped Liquid Crystal lonomer Solid Polymer Electrolyte in Mesomorphic Range
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Conductivity of PEO/PLA Doped Liquid Crystal lonomer Solid Polymer Electrolyte in Mesomorphic Range

机译：PEO / PLA掺杂液晶离聚物固体聚合物电解质的介晶范围

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摘要

A novel polyethylene oxide (PEO)/polylactic acid (PLA) solid polymer electrolyte (SPE) doped with Liquid crystal ionomer (LCI) was prepared by automatic scraping membrane technology and the liquid crystal property of LCI was proposed as an effective strategy to improve the conductivity. The highest conductivity of the SPE with 0.5 wt% LCI achieve a value of 2.19x10(-4) S/cm at 17 degrees C which is approximately four orders of magnitude higher than that of the original PEO solid polymer electrolyte, conductivity at room temperature is 10(-7)-10(-8) S/cm. This is because the crystallinity is reduced by 25.3% compared to the pure PEO host. Differential Scanning Calorimetry (DSC) and polarizing microscope (POM) characterize the structure and properties of LCI. Electrochemical Impedance Spectroscopy (EIS) shows that the conductivity of the polymer electrolyte with 0.5 wt% LCI increased abruptly at 35 degrees C as the temperature is higher than T-g of LCI, reaching 6.37x10(-4) S/cm which is 191% higher than that at 17 degrees C. There ionic conductivity has been improved extremely by continuous channel for efficient ion transportation, especially at the microtherm. And this change is greater at the elevated temperature regions, in line with the VTF equation. In summary, LCI's liquid crystal performance can be used as an effective strategy to improve the low temperature conductivity of SPE.
机译：通过自动刮膜技术制备了掺杂液晶离聚物（LCI）的新型聚环氧乙烷（PEO）/聚乳酸（PLA）固体聚合物电解质（SPE），提出了改善LCI液晶性能的有效策略。电导率。含0.5 wt％LCI的SPE的最高电导率在17摄氏度时达到2.19x10（-4）S / cm的值，比原始PEO固体聚合物电解质的电导率高约四个数量级，室温下的电导率是10（-7）-10（-8）S / cm。这是因为与纯PEO基质相比，结晶度降低了25.3％。差示扫描量热法（DSC）和偏振显微镜（POM）表征了LCI的结构和性质。电化学阻抗谱（EIS）显示，当温度高于LCI的Tg时，含35 wt％LCI的聚合物电解质的电导率在35摄氏度时突然增加，达到6.37x10（-4）S / cm，较之高191％与在17摄氏度下相比，离子传导率得到了极大提高。通过连续通道可以有效地进行离子传输，尤其是在微温热条件下。根据VTF方程，这种变化在高温区域更大。总之，LCI的液晶性能可以用作提高SPE低温电导率的有效策略。

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