当今物联网时代柔性电子技术的兴起，对高性能柔性电子材料的需求日益迫切。无机介电储能电容器作为一类重要的能量存储器件，在高能脉冲功率技术领域具有不可替代的作用。针对目前无铅Na0.5Bi0.5TiO3(简称NBT)基介电薄膜无法实现柔性可弯曲、储能密度偏低的问题，本项目采用柔性耐高温云母衬底，沉积具有良好导电性的底电极材料，优化NBT基薄膜的制备工艺参数，获得高质量的柔性薄膜电容器；利用组成设计增强离子分布的无序性，通过添加SrTiO3等固溶物增强弛豫性，提高有效储能密度和储能效率，并研究组成-微观畴结构-储能性能之间的本质联系，明确储能性能的微观调控机制；通过研究不同形变状态下NBT基薄膜微观结构和储能性能的变化规律，揭示机械弯曲对薄膜储能性能的影响机制，并通过对弯曲应变的调控维持良好的储能性能。该项目为设计高性能NBT基储能原型器件提供理论基础和技术指导，推进柔性储能器件的快速发展。

In the present era of “Internet-of-Things”, with the arising of flexible electronic technology, there is an increasingly urgent demand for the high-performance flexible electronic materials. As an important energy-stored device, the inorganic dielectric capacitor plays an irreplaceable role in high-energy pulse power technology area. Propelled by the challenge of overcoming the bottlenecks of inflexibility and inferior energy storage density of the lead-free Na0.5Bi0.5TiO3 (abbreviated as NBT)-based dielectric thin films, the mica with high bendability and thermal stability is adopted for depositing bottom electrode with high conductivity in this project. Through the optimization of preparation processing parameters for NBT-based thin films, the high-performance bendable thin film capacitors can be obtained. The ion distribution disorder is expected to be enhanced in NBT thin film via composition design, where the modifiers, such as SrTiO3, are employed to form solid solutions with NBT to achieve strong relaxor behaviors, thereby improving the recoverable energy storage density and efficiency. The intrinsic correlation between the system composition, microscopic domain configuration and the energy storage property will be studied, and the regulation mechanism is expected to be well clarified for enhancing the energy storage performance. The changes in the microstructure and energy storage property of the flexible NBT-based films will be investigated under various deformation conditions, from which the influence mechanism of mechanical flexing to the energy storage property will be revealed. The regulation of bending strain will be conducted to maintain the favorable energy storage property. This project is promising to provide theoretical basis and technological guidance for the design of high-performance NBT-based prototype device for energy storage applications, and further to stimulate the fast development of the flexible energy storage electronics.