石墨烯基超级电容器研究进展  

Progress in graphene based supercapacitors

作　　者：杨德志[1] 沈佳妮[1] 杨晓伟[1,2] 马紫峰[1] 

机构地区：[1]上海交通大学电化学与能源技术研究所,上海200240 [2]Department of Materials Engineering,Monash University

出　　处：《储能科学与技术》2014年第1期1-8,共8页Energy Storage Science and Technology

基　　金：国家973计划(2014CB239700);国家自然科学重点基金(21336003)项目

摘　　要：超级电容器是最具应用前景的电化学储能技术之一。目前,超级电容器的研究重点是提高能量密度和功率密度,发展具有高比表面积、电导率和结构稳定性的电极材料是关键。石墨烯因具有比表面积大、电子导电性高、力学性能好的特点而成为理想的电容材料,但石墨烯的理论容量不高,在石墨烯基电极制备过程中容易发生堆叠现象,导致材料比表面积和离子电导率下降。因此,发展合适的制备方法,对石墨烯进行修饰或与其他材料形成复合电极材料是一种有效解决途径。本文对石墨烯基电极及其在双电层电容器、法拉第准电容器和混合型超级电容器中的应用的研究进展进行归纳,重点介绍了石墨烯凝胶薄膜电极的制备过程,以促进石墨烯基电极在超级电容器构筑中应用。As one of the most promising type of energy storage devices, supercapacitors have attracted a great attention in recent years. Current focuses of research lie in the development of approaches to increase energy density and power density through increasing specific surface area, electrical conductivity and structural stability of capacitor materials. Graphene provides an ideal candidate capacitor material due toits large surface area, outstanding electrical conductivity and mechanical properties.However, restacking of graphene particles often occurs during fabrication processes, which reduces the actual specific surface area and ion conductivity. Keys to resolve this issue include the development of an appropriate fabrication method of graphene, modification of graphene surface with functional groups and formulation of graphene-based composite materials. This paper reports our recent work on graphene-based electrodes and their applications in electric double layer capacitors, pseudo- capacitors and asymmetric supercapacitors. Specific attention is paid to the fabrication of graphene gel film electrodes.

关 键 词：石墨烯 超级电容器 导电聚合物 金属氧化物 能量密度 功率密度 

分 类 号：TM53[电气工程—电器]