低维多元钙钛矿型铌酸盐复合石墨烯制备及其3D打印柔性压电器件

With the development of the intelligent sensing, intelligent driving, intelligent robot, flexible energy conversion, unconstrained energy generation, wearable and so on, the requirements of piezoelectric materials increase. Among them, the flexible piezoelectric materials have been widely concerned by many researchers. Aimed at the flexible electronic device with practical value, such as flexible lead-free piezoelectric devices, it is important to develop the target structures (including morphology, size and surface) of the morphotropic phase boundary compositions of multiple perovskite niobate and graphene composite lead-free piezoelectric materials, and to realize the reasonable adjustment of fine materials with controllable chemical synthesis method. This project bases on the innovative research of nanomaterials, and the technical platform of 3D direct-writing printing. The influence of crystal dimension, anisotropy, microtexture and orientation arrangement on the flexibility and piezoelectric properties of materials is discussed. To further improve the piezoelectric properties of materials, the factors that influence the piezoelectric properties are analyzed from atomic, microscopic and mesoscopic level. It will guide the design of the new flexible lead-free piezoelectric materials with high industrial application value, will lay the foundation for the ultimate realization of the industrial application of high performance flexible lead-free piezoelectric materials.

随着智能传感、智能驱动、智能机器人、柔性换能、无约束能源发电、可穿戴等领域对压电材料性能要求的提高，柔性压电材料受到众多研究者的广泛关注。申请人拟围绕低维多元钙钛矿铌酸盐材料复合石墨烯制备及其3D打印柔性压电器件应用开展研究工作。旨在针对有实用价值的柔性电子器件，如柔性无铅压电器件，发展以结构确定（包括形貌、尺寸和晶面）的准同型相边界处成分的多元钙钛矿型铌酸盐与石墨烯复合的无铅压电材料，及以用可控化学合成方法实现纳米材料本身的精细合理调控制备的方法。将以纳米材料的创新研究为基础，以3D直写打印为技术平台。结合理论计算，探讨晶体维度、各向异性、微观织构、取向排布等，对材料的柔性和压电性能影响；力图从原子、微观和介观层面剖析影响压电性能的因素，进一步提高材料的压电性能。从而有指导性地设计制备具有应用价值的新型柔性无铅压电墨水，为最终实现高性能的柔性无铅压电材料的实际应用奠定基础。

随着智能传感、智能驱动、智能机器人、柔性换能、无约束能源发电、可穿戴等领域对压电材料性能要求的提高，柔性压电材料受到众多研究者的广泛关注。围绕低维多元钙钛矿铌酸盐材料复合物制备及其3D打印柔性压电器件应用开展研究工作。相关研究对指导性地设计制备具有应用价值的新型柔性无铅压电墨水，为最终实现高性能的柔性无铅压电材料的实际应用奠定基础。本课题的研究成果在Matter，Advanced Materials，Nano Research，Nano Energy，J. Mater. Chem. A等SCI 检索系统收录的国际学术期刊上发表或接收15篇（其中，12篇影响因子大于10），申请和授权发明专利6项，其中2项已授权。1）实现低维材料制备，包括低维多元无铅钙钛矿型铌酸盐压电材料的可控合成和系列类石墨烯基材料制备。相关工作发表在Nano Research, 2022, DOI: 10.1007/s12274-022-4667-x. 同时综述了贵金属MXene基异质材料的相关进展（Journal of Materials Chemistry A, 2022, 10, 14674)，为异质活性墨水的配置及异质材料性能、原子结构及稳定性能的深入科学问题和原理机制研究提供基础。2）打印高性能无铅柔性压电器件，包括低维无铅钙钛矿型铌酸盐压电复合物和柔性聚合物协同材料的设计制备和压电性能研究，及打印高精度柔性无铅柔性薄膜。相关工作发表在Matter, 2022, DOI: 10.1016/j.matt.2022.11.023上等期刊上。为柔性传感器件提供研究基础和应用演示。3）墨水溶剂相图建立及其他功能器件打印及构筑。相关工作发表在Advanced Materials, 2022, 34, 202207392，Advanced Materials, 2020, 32, 1908006，Nano Energy, 2019, 63, 103885等期刊上。为功能性墨水构建提供策略，为传感器件的进一步多场景应用提供基础。