基于“电荷传输高速网络的微纳三维电极结构的柔性超级电容的制备与性能研究

项目名称： 基于“电荷传输高速网络的微纳三维电极结构的柔性超级电容的制备与性能研究

项目编号： No.11474135

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 潘孝军

作者单位： 兰州大学

项目金额： 90万元

中文摘要： 柔性超级电容器因其便携式和多功能化等优点成为柔性储能器件领域的研究热点。其中兼具柔性与优异电化学性能的电极作为核心部件，是柔性超级电容器电极研究的重点与难点。而电极的结构是提高其电化学性能的关键，原因是电化学反应中离子扩散距离和电子传输速率强烈依赖于电极结构。目前，基于石墨烯和碳纳米管的柔性超级电容电极材料，存在比表面积小、导电率低、多孔率低及柔性差等缺点，严重影响了柔性超级电容的性能。鉴于此，本项目提出基于电荷高速传输网络的电极即三级三维复合结构（三维石墨烯（100 μm）/碳纳米管阵列（1 μm）/电活性物质（10 nm）），这种结构可有效地减小电子积累和增加离子扩散距离，同时具有良好的柔性。将此结构用于制备柔性超级电容的电极以期获得优异的电化学性能。本项目为高性能柔性超级电容电极材料的研究提供了一种新思路，为电容器在储能方面的研究与实际应用提供科学依据。

中文关键词： 三维电极；电荷传输高速网络；三级；柔性；超级电容器

英文摘要： The flexible supercapacitors have being become a research hotspot in the flexible energy storage devices field owing to their attractive characteristics such as portable, multi-functional and so on. As a core component of supercapacitor, the flexible and high electrochemical performance electrode plays an important role in flexible supercapacitor. Moreover, the electrode structure is a key factor to improve its electrochemical performance. The mainly reason of which is that the ion diffusion distance and electron transfer rate is strongly dependent on the electrode structure in the electrochemical reaction. Now, the electrode materials of flexible supercapacitors which based on Graphene or CNTs present small specific surface area,poor conductivity,low porous rate,poor flexible and so on.For such reasons, we propose a electrode structure of the highway networks for electron transfer and easy access for electrolyte ions and design three-dimensional and ternary graphene (100 μm)/carbon nanotube array (1 μm)/active materials (10 nm) structure on the basis of our existing experiments. And, this structure can effectively reduce the electron accumulation and increase ion diffusion distance, resulting in an excellent electrochemical performance. This project provides a new idea for high-performance flexible supercapacitor electrode, and has important scientific significance and application prospects for flexible supercapacitor in flexible energy storage devices field.

英文关键词： Three-Dimensional Electrodes;Charge Transfer High Networks;Ternary;Flexible;Supercapacitors