分子导线桥连的石墨烯/聚苯胺超级电容器电极材料的制备及性能

项目名称： 分子导线桥连的石墨烯/聚苯胺超级电容器电极材料的制备及性能

项目编号： No.21073092

项目类型： 面上项目

立项/批准年度： 2011

项目学科： 金属学与金属工艺

项目作者： 郝青丽

作者单位： 南京理工大学

项目金额： 12万元

中文摘要： 为提高电极材料的导电性，本项目采用原位生长-还原的方法,合成了各组份空间生长取向可控、并用分子导线桥连的石墨烯/聚苯胺高性能超级电容器电极材料。利用石墨烯单片层分子结构可功能化修饰的特点，聚苯胺在石墨烯上可选择性地原位生长，通过控制其生长取向，阻挡石墨烯因π#960;堆积的石墨化，并在石墨烯片层间形成"分子导线"，石墨烯优异的力学性能有助于克服聚苯胺循环不稳定的缺点。复合产生的协同效应可以弥补单一电极材料的不足，使电化学储电性能得到增强。本项目探讨石墨烯与聚苯胺的复合方式对材料的结构、形貌和性能的影响；研究功能化石墨烯的活性基团对复合材料各组份的空间取向、分子导线的形成、材料微结构和储电性能的影响；确定复合材料的微观结构与电化学性质的关系；揭示石墨烯和聚苯胺之间的协同效应。为获得性能优异、使用寿命长、成本低的新型超级电容器用复合电极材料提供重要的实验和理论依据。

中文关键词： 石墨烯；聚苯胺；电极材料；分子导线；复合物

英文摘要： In order to improve the conductance of supercapacitor electrode materials, high performance graphene/polyaniline (GE/PANI)composites with controlled growth-orientation of each component, bridged by molecular wires, were fabricated via in-situ growth-reduction. On the basis of the easy functionalization of single graphene, PANI selectively grew on graphene sheets. By the controllation of its growth orientation, the graphitization of graphene due toπ#960; stacking could be blocked, and at the same time, PANI molecular wires formed between graphene sheets. The excellent mechanical property of graphene might improve the poor cycle stability of PANI. The synergetic effect from combination of both components could overcome the disadvantage of individual material, and enhance the electrochemical performance of electrical storage. Here, the effect of the combination mode of both components on the microstructure, morphology and properties of the composites have been investigated. The effects of the functional groups of graphene on the growth orientation, molecular wire formation, microstructure and electrochemical performance of the composites were explored. The relationship between performance and microstructure of the composites was studied. The synergestic effect of the combination of both graphene and PANI was studied too. All these results offer the valuable experimental and theoritical data for the development of new electrode material for high-performances, long -lifetime and low-cost supercapacitors.

英文关键词： graphene;polyaniline;electrode materials; molecular wire; composite