有机-无机复合电介质的电场分布特性及介电强度的有限元分析

Finite Element Analysis of Electric Field Distribution and Dielectric Strength of Organic-Inorganic Composite Dielectrics

有机聚合物介质材料由于其具有柔性、易加工、轻量化以及耐高压的特性而在电介质储能领域中具有广泛的应用前景。然而,受限于有机材料较低的介电常数,通过添加具有高介电常数纳米颗粒制备有机-无机复合电介质材料成为储能领域的研究热点。利用有限元分析方法,系统研究无机纳米颗粒介电常数及分布特征对复合电介质内部电势及电场强度的影响规律,探究影响材料介电强度的主要因素。在此基础上,总结提高复合电介质储能密度的有效途径,以期对高储能密度电介质材料的设计提供理论预测和指导。

Organic polymer dielectric material has a wide application prospect in the field of dielectric energy storage owing to its characteristics of flexibility,easy machining,lightweight and high voltage resistance.However,due to the low dielectric constant of organic materials,the fabrications of organic-inorganic composite dielectrics via adding nanoparticles with high dielectric constant have become research hotspots in the field of energy storage materials.In this work,the effects of dielectric constant and distribution characteristics of inorganic nanoparticles on the distribution of electric potential and electric field strength in composite dielectric are systematically studied by using finite element analysis method.Meanwhile,the main factors affecting the dielectric strength of composite materials are revealed as well.On this basis,the effective ways to improve the energy storage density of composite dielectric are summarized,which provide theoretical prediction and guidance for the design of dielectric materials with high energy storage density.