Analysis of Disordered Dynamics in Polymer Nanocomposite Dielectrics for the Realization of Fractional-Order Capacitor
Analysis of Disordered Dynamics in Polymer Nanocomposite Dielectrics for the Realization of Fractional-Order Capacitor
复制标题
聚合物纳米复合电介质的无序动力学分析以实现分数阶电容器
DOI：
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发表时间：
2021
影响因子：
3.1
通讯作者：
F. A. Khanday
中科院分区：
文献类型：
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作者：
Zaid Mohammad Shah;F. A. Khanday
本文以部分导电石墨烯纳米片(GNS)/P(VDF)聚合物纳米复合材料为研究对象，对无序介电材料进行了分析。分析表明，具有最小电导率的聚合物复合材料可以用作分数阶电容器(FOC)的介质。在P(VDF)矩阵中，GNS重量百分比从3wt%变化到13wt%，以跟踪电导率的起始和饱和。在100赫兹到20兆赫的频率范围内对样品进行了阻抗谱测试，并进行了X射线衍射和拉曼光谱测试。阻抗的相角从−84°变化到−46°，在~30年的频率范围内，最大相位纹波为±5°。复阻抗的分数阶‘α’在0.93-0.51之间变化。利用Cole-Cole模型对所有样品的非理想介电响应进行了Nyquist图和Bode图的拟合，得到了基于Cole-Cole模型的电学等效电路。使用等效电路数据来监测与理想电容行为的偏差。
In this work, analysis of disordered dielectrics is performed in light of partially conductive graphene nanosheets (GNS)/P(VDF) polymer nanocomposites. The analysis shows that the polymer composites with minimal conductivity can be employed as dielectrics for fractional-order capacitor (FOC). GNS weight percentage is varied from 3 to 13 wt% in P(VDF) matrix to track the onset and saturation of conductivity. Impedance spectroscopy of the samples is carried out in the frequency range of 100 Hz to 20 MHz along with XRD and Raman spectroscopy. The phase angle of the impedance varies from −84° to −46° with a maximum phase ripple of ±5° over a frequency range of ~ 3 decades. The fractional-order ‘α’ of the complex impedance varies from 0.93 to 0.51. Nyquist and Bode plots for all the samples are fitted using Cole-Cole model for non-ideal dielectric response and the electrical equivalent circuit based on Cole-Cole model is obtained. The deviation from ideal capacitive behavior is monitored using the equivalent circuit data.
影响因子：
6.6
作者：
Bissett, Mark A.;Worrall, Stephen D.;Dryfe, Robert A. W.
通讯作者：
Dryfe, Robert A. W.