Energy storage devices constitute one of the research areas in recent years. Capacitors are commonly used for the storage of electrical energy. The current research is focusing on not only the improvement in energy density but also the materials which are environment friendly. Polymer composites are known to be technically essential materials owing to their wide range of applications. Enormous research has been devoted to zinc oxide- (ZnO-) based polymer nanocomposites, due to their extraordinary dielectric properties. This review article presents a detailed study of the dielectric properties of ZnO-based nanocomposites. The dielectric constant study includes the effect of transition metals and rare earth metals as a dopant in ZnO. This review gives an insight into the mechanism responsible for the variation of dielectric constant in ZnO nanocomposites due to various factors like size of nanoparticles, thickness of the thin film, operating frequency, doping concentration, and atomic number. The observations have been summarized to convey the mechanism and structural changes involved in the ZnO nanocomposites to the researchers. The deployment of biodegradable nanocomposite materials is expected to open an innovative way for their outstanding electronic applications as storage materials.

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ZnO基纳米复合材料的介电性能及其潜在应用

储能装置是近年来的研究领域之一。电容器通常用于存储电能。目前的研究不仅关注能量密度的提高，还关注环境友好的材料。众所周知，聚合物复合材料是技术上必不可少的材料，因为它们的应用范围很广。由于其非凡的介电性能，大量研究一直致力于基于氧化锌 (ZnO-) 的聚合物纳米复合材料。这篇综述文章详细研究了 ZnO 基纳米复合材料的介电性能。介电常数研究包括过渡金属和稀土金属作为 ZnO 中的掺杂剂的影响。这篇综述深入了解了导致 ZnO 纳米复合材料介电常数变化的机制，原因是纳米颗粒的大小、薄膜的厚度、工作频率、掺杂浓度和原子序数等各种因素。对观察结果进行了总结，以向研究人员传达涉及 ZnO 纳米复合材料的机制和结构变化。可生物降解纳米复合材料的部署有望为其作为存储材料的出色电子应用开辟一条创新之路。