石墨烯/聚乙烯醇“互啮”型交替层状材料的构筑及其电容性能的研究

项目名称： 石墨烯/聚乙烯醇“互啮”型交替层状材料的构筑及其电容性能的研究

项目编号： No.51303158

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 一般工业技术

项目作者： 范萍

作者单位： 浙江工业大学

项目金额： 25万元

中文摘要： 如何获得体积小，质量轻，储能密度高的大功率电容器是人们一直以来的追求。在同样体积下，尽可能的增加电极总表面积以提高储能密度是实现这一目标的主要手段之一。本研究拟采用旋涂-组装的方法制备与多层陶瓷电容器结构类似的石墨烯/聚乙烯醇"互啮"型交替层状材料，利用石墨烯层的高导电性和聚乙烯醇层的绝缘性构成若干微电容的并联，以获得具有高储能密度、低损耗，柔韧性好的薄膜电容。通过研究构筑过程中各种因素（如：溶液浓度、旋涂参数等）对材料结构、形态的影响规律及其作用机理，建立起形貌调控的有效手段；在此基础上，制备出具有不同微观结构的层状复合材料，深入研究其微观结构（如聚乙烯醇层结构、石墨烯层结构、界面层结构、组装层数等）对电容性能的影响规律及作用机理；探索设计、制备高储能密度、低损耗、柔韧性好的多层薄膜电容的新思路及其科学依据。这无论是从基础理论研究角度还是对推动新材料的研究与应用开发都具有重要的意义。

中文关键词： 石墨烯；交替层状结构；介电材料；微观结构调控；

英文摘要： Capacitors are important storge component in electronic equipment. It is a problem attacting wide attention that how to obtain capacitors with high energy storge density, small volume and light quanlity. Enlarging electrode area under same volum is one of main appoaches in solving this problem. Since graphenes has excellent electrical conductivity and a flake shape with high aspect ratio while polymers are insolent, the alternate-layered structure of graphene and ploymer could form a microcapacitor. The propose of this project is preparing a novel film capacitor consisting with intermeshing alternating layers of graphene and polymer through spinning coating & self-assembly technology. By controlling the dispersion of the graphene sheets in polymer matrix, a shunt capacitance will be built. This film capacitor,having similar structure with that of Multi-Layer Ceramic Capacitor, might have high energy density, low loss and good flexibility. The effect of spin-coating factors and self-assembly factors on microstructure of the composite will be studied and the mechanism will be analyzed. On this basis, an effective method in controlling micro-morphologies will be constructed. Then, alternated-layered composite with different microstructures (such as different polymer layer, different graphene layer, different interf

英文关键词： graphene；ulternate-layed composite；dielectric properties；morphology control；