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Numerical Characterization for Electrical Conductivity of Two-Dimensional Nanocomposite Systems with Conducting Fiber Fillers

机译：含导电纤维填料的二维纳米复合材料电导率的数值表征

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Hybrid nanotube composite systems with two different types of fillers attract considerable attention in several applications. The incorporation of secondary fillers exhibits conflicting behaviors of the electrical conductivity, which either increases or decreases according to the dimension of secondary fillers. This paper addresses quantitative models to predict the electrical performance in the configuration of two dimensional systems with one-dimensional secondary fillers. To characterize these properties, Monte Carlo simulations are conducted for percolating networks with a realistic model with the consideration of the resistance of conducting NWs, which conventional computational approaches mostly lack from the common assumption of zero-resistance or perfect conducting NWs. The simulation results with nonperfect conductor NWs are compared with the previous results of perfect conductors. The variation of the electrical conductivity reduces with the consideration of the resistance as compared to the cases with perfect conducting fillers, where the overall electrical conductivity solely originates from the contact resistance caused by tunneling effects between NWs. In addition, it is observed that the resistance associated with the case of invariant conductivity with respect to the dimension of the secondary fillers increases, resulting in the need for secondary fillers with the increased scale to achieve the same electrical performance. The results offer useful design guidelines for the use of a two-dimensional percolation network for flexible conducting electrodes.
机译：具有两种不同类型的填料的混合纳米管复合材料系统在几种应用中引起了相当大的关注。辅助填料的掺入表现出电导率的冲突行为，其根据辅助填料的尺寸而增加或减小。本文提出了定量模型，以预测带有一维二次填料的二维系统配置中的电气性能。为了表征这些特性，在考虑导电NW的电阻的情况下，对带有实际模型的渗流网络进行了蒙特卡洛模拟，而传统的计算方法由于零电阻或理想导电NW的一般假设而普遍缺乏传统的计算方法。将非理想导体NW的仿真结果与理想导体的先前结果进行了比较。与具有完美导电填料的情况相比，考虑到电阻，电导率的变化降低了，在这种情况下，总电导率仅源于由NW之间的隧道效应引起的接触电阻。另外，观察到，与辅助填充剂的尺寸有关的电导率恒定的情况相关的电阻增加，导致需要具有增加的规模的辅助填充剂以实现相同的电性能。结果为将二维渗滤网络用于柔性导电电极提供了有用的设计指南。

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