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首页> 外文期刊>International Journal of Electrochemical Science >Conductivity and Electrical Properties of Chitosan - Methylcellulose Blend Biopolymer Electrolyte Incorporated with Lithium Tetrafluoroborate
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Conductivity and Electrical Properties of Chitosan - Methylcellulose Blend Biopolymer Electrolyte Incorporated with Lithium Tetrafluoroborate

机译：四氟硼酸锂与壳聚糖-甲基纤维素共混生物聚合物电解质的电导率和电性能

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摘要

This work focuses on the structural and electrical properties of solid biopolymer blend electrolytes based on chitosan and methylcellulose incorporated with lithium tetrafluoroborate (LiBF4). The polymer electrolyte films were prepared by solution casting technique. The polymer blend comprised of 75 wt.% chitosan and 25 wt.% methylcellulose, the most amorphous blend composition are used as the host matrix. Fourier transform infrared (FT-IR) spectroscopy analysis demonstrated the interactions between biopolymer blend and LiBF4. The highest value of electrical conductivity at ?6 ?1 ambient temperature 3.74×10 S cm was obtained for the sample containing 40 wt.% LiBF4. All electrolyte samples were found to obey the Arrhenius rule. The magnitude of activation energy decreases with increasing electrical conductivity and vice-versa. Rice and Roth model was applied to analyze the electrical conductivity enhancement. The temperature dependence of the frequency exponent (s) shows that the conduction mechanism depends on the salt concentration, the appropriate model for low concentration was found to be correlated barrier hopping (CBH) model, while for high salt concentration samples follow the non-overlapping small polaron tunneling (NSPT) model.
机译：这项工作的重点是基于壳聚糖和甲基纤维素与四氟硼酸锂（LiBF4）结合的固体生物聚合物共混电解质的结构和电性能。通过溶液流延技术制备聚合物电解质膜。由75重量％的壳聚糖和25重量％的甲基纤维素组成的聚合物共混物，最无定形的共混物组合物用作主体基质。傅里叶变换红外（FT-IR）光谱分析表明生物聚合物共混物和LiBF4之间的相互作用。对于含有40重量％的LiBF 4的样品，在〜6×1个环境温度下获得了3.74×10 S cm的最高电导率。发现所有电解质样品均符合阿累尼乌斯规则。活化能的大小随电导率的增加而减小，反之亦然。采用Rice and Roth模型分析电导率的提高。频率指数与温度的关系表明，传导机制取决于盐浓度，发现低浓度的适当模型是相关的壁垒跳跃（CBH）模型，而高盐浓度的样本遵循非重叠小极化子隧穿（NSPT）模型。

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