面向超构电容器的负介电材料设计及正-负介电协同增强机理

“中国制造2025” 对电子工业中新型电容器的研发提出了小型化、高频化和高容量的迫切需求，传统电容器材料在高频下介电常数大幅下降，已成为制约该领域发展的瓶颈。针对该问题本项目提出，将负介电材料与正介电材料以叠层形式构建超构电容，利用正-负介电协同效应实现高频下的介电增强。研究金属功能体组分、形貌、分布状态与负介电频散特性之间的关联，探明负介电常数的调控机制；探索正、负介电材料的厚度比、频散特性等因素对超构叠层材料性能的影响规律，结合电磁仿真，阐明超构叠层材料中等效电子的界面输运特性及正-负介电协同增强效应的机理。通过本项目的实施，推进负介电材料实用化进程，为新型电容器的研发提供理论基础与技术支持。

With the policy of intelligent manufacturing technology, miniaturization, capacitors of high frequency and high capacity are in the urgent need in microelectronics industry. However, it has been a bottleneck that the dielectric constant of the capacitor material drops significantly at high frequencies. In view of this problem, the meta-stacked structure is constructed by combining the negative permittivity material with the positive permittivity material, and it is by the positive and negative synergistic effect that the permittivity is enhanced at high frequency. The relationship between the composition, morphology, distribution of the metal functional component and the negative permittivity is studied in order to elucidate the mechanism of the negative permittivity; The influence of the dielectric value, dispersion and thickness ratio of positive and negative permittivity material on the properties of the meta-stacked structure is systematically studied; Combined with the simulation results, the mechanism of microscopic transport behavior is explored in the interface of meta-stacked structure, and the microscopic mechanism of positive and negative synergistic effects is also studied. The project will promote the practical application of negative permittivity materials, and also provide a solid theoretical basis and technical support for the development of novel capacitors.