新型复合电化学电容器的研究  

Study on a new hybrid electrochemical capacitor

作　　者：苏岳锋[1] 吴锋[1] 赵淑红[1] 毛立彩[1] 

机构地区：[1]北京理工大学化工与环境学院国家高技术绿色材料发展中心,北京100081

出　　处：《电源技术》2004年第4期223-226,共4页Chinese Journal of Power Sources

基　　金：国家科技部基础研究重大项目前期研究专项项目(2001 CCA 05000);国家重点基础研究发展规划项目(2002 CB 211800)

摘　　要：在单体碳/碳型双电层电容器的电极中分别添加一定量具有高容量性质的活性物质,构成正、负复合电极,活性物质经激活后即可在两极存储电能。该新型复合电容器与原碳/碳型双电层电容器相比,具有更高的稳定工作电压以及较高的单电极比容量,可有效改善双电层电容器的比能量及安全性能。根据所加活性物质比例及所选工作电压之不同,比能量可增加45%～70%。经不同电流密度恒流充放电试验,复合电容器的功率密度、充放电效率及循环寿命等性能良好,高容量活性物质的添加对双电层电容器较高的自放电现象具有一定的抑制作用。Electric double-layer capacitor (EDLC) which use aqueous electrolyte usually has low energy density because it has low working voltage.The energy density and the safety of the capacitor are the most important factors that determine the feasibility of EDLC's use in a particular high power application. Some active materials were added in EDLC's two carbon electrodes in order to get a higher cell voltage. Thus 45%-70% energy density raise of the hybrid capacitor can be obtained, and the using of the capacitor will be more safe. In addition, the hybrid capacitor has the advantages like as high power density, high charge-discharge efficiency, long cycle life and slow self-discharge.

关 键 词：复合电化学电容器 电极 活性物质 电化学特性 自放电现象 

分 类 号：TM53[电气工程—电器]