Studies on the Influence of Titania Content on the Properties of Poly(vinyl chloride) - Poly (acrylonitrile)-Based Polymer Electrolytes
Studies on the Influence of Titania Content on the Properties of Poly(vinyl chloride) - Poly (acrylonitrile)-Based Polymer Electrolytes
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二氧化钛含量对聚氯乙烯-聚丙烯腈基聚合物电解质性能影响的研究
DOI：
10.1080/03602559.2013.820745
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发表时间：
2013
影响因子：
--
通讯作者：
K. Ramesh
中科院分区：
文献类型：
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作者：
S. Ramesh;H. Ng;R. Shanti;K. Ramesh
以聚氯乙烯（PVC）、聚丙烯腈（PAN）、双（三氟甲磺酰）亚胺锂（LiTFSI）和二氧化钛（TiO2）为基体，通过溶液流延法研制出纳米复合固体聚合物电解质。在基体中适当添加 TiO2 含量可显着提高离子电导率，可以看出，添加 3 wt.% 的 TiO2 时，离子电导率最高为 6.48 × 10−4 S cm−1。 3 wt.% TiO2 的存在调整了共混 PVC-PAN 的绝缘性能，并大大增加了基体无定形结构，允许更大的离子传输，从而改善了导电性质。 PVC-PAN: LiTFSI 和 TiO2 之间相互作用增强时，结构无序度会增加。离子电导率-温度图表明，电导率增强是通过阳离子频繁跳跃到邻近的空位来热辅助的，这遵循阿累尼乌斯行为。通过介电常数研究和所有测试样品中正切损耗峰的出现，可以了解材料电极界面极化过程的发生和偶极子的存在。还进行了电模量研究，以研究复合材料中电导率弛豫时间方面的离子弛豫过程。
Nanocomposite solid polymer electrolytes were developed from the matrix of poly (vinyl chloride) (PVC), poly (acrylonitrile) (PAN), lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) and titania (TiO2) by solution-casting method. An appropriate addition of TiO2 content in the matrix enhances the ionic conductivity significantly, as being viewed, the highest ionic conductivity of 6.48 × 10−4 S cm−1 was achieved upon addition of 3 wt.% of TiO2. The presence of 3 wt.% TiO2 tailors the insulating properties of the blended PVC-PAN and greatly increases the matrix amorphous structure, permitting greater ionic transport and hence improves the conducting nature. The increase in the structural disorderliness occurs upon greater interaction between PVC-PAN: LiTFSI and TiO2. The ionic conductivity-temperature plots show that the conductivity enhancement is thermally assisted through the frequent hopping of cations to the neighboring vacant site, which follows Arrhenius behavior. The occurrence of material electrode interface polarization process and presence of dipoles were understood from the permittivity study and through the appearance of tangent loss peaks in all the tested samples respectively. The electrical modulus studies were also done to investigate the ionic relaxation processes in the composites in term of conductivity relaxation time.