柔性阶层多孔石墨烯复合膜的制备及电容性能研究

项目名称： 柔性阶层多孔石墨烯复合膜的制备及电容性能研究

项目编号： No.21501113

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 常云珍

作者单位： 山西大学

项目金额： 20万元

中文摘要： 柔性阶层多孔石墨烯复合膜在电化学电容器储能领域中有重要的应用价值。本项目以氧化石墨烯为原料，邻苯二胺、间苯二胺、乙二胺等多胺分子为凝固剂，尿素为多孔模板，通过组装法制备柔性阶层多孔石墨烯膜。采用化学或电化学方法将电活性过渡金属氧化物沉积到石墨烯膜，制备柔性阶层多孔石墨烯复合膜，实现电活性物质和石墨烯微结构的多尺度复合。利用石墨烯导电性高和比表面积大的特点，增加对电活性物质的有效利用。阶层多孔结构解决电解质离子扩散距离和传递电阻大，电解质离子易接触比表面积小的问题，改善柔性复合膜的速率性能。通过研究各组分的组成、比例、复合膜孔隙结构对电容性能的影响，阐明柔性阶层多孔石墨烯复合膜微观结构与其电容性能的关系。该项目的设立将为设计与合成柔性复合电极材料奠定一定的基础。

中文关键词： 石墨烯；阶层多孔；过渡金属氧化物；柔性电容器

英文摘要： The hierarchical porous flexible graphene composite film exhibits an important application value in the field of electrochemical capacitor. In this project, we are going to realize this task as the following steps: firstly, the hierarchical porous flexible graphene composite films will be prepared through self assembly method by taking graphene oxide as a sourece, polyamine compounds including o-phenylendiamine, m-phenylenediamine, ethylenediamine, etc. as curing agent and urea for porous templates. And then electroactive transition metal oxides were deposited on the assembly through chemical or electrochemical deposition methods，in which the electrically active material and the porous flexible graphene will be assembled well in the microstructure and the multi scale. Graphene，with high conductivity and lager specific surface area, can increase the effective usage of electroactive material. The hierarchical structure of composite film resolve those problems such as too large diffusion distanceand transfer resistance, too small easy-contact surface in electrolyte ions, and thus improve the rate performance of flexible materials. Our research should be very hopeful expound the relationship between microstructure and capacitance performance through investigating the ratio of composition, pore structure and size distribution of composites. The present project will set a foundation for design and synthesis of flexible electrode materials.

英文关键词： graphene;hierarchical porous;transition metal oxides;flexible capacitor