石墨类负极在非对称电化学电容器中的应用  

Application of the graphite negative electrodes in asymmetric electrochemical capacitors

作　　者：包丽颖[1] 吴锋[1] 苏岳锋[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：《电子元件与材料》2007年第3期20-23,共4页Electronic Components And Materials

基　　金：国家基础研究重大项目前期研究专项资助项目(2001CCA05000);国家重点基础研究发展计划资助项目(2002CB211800)

摘　　要：以天然石墨(G)、中间相碳微球(MCMB)、中间相碳纤维(MCF)等石墨类电极与活性炭电极构成非对称体系,电化学测试表明,电容器的充放电性能与石墨类电极的快速嵌脱锂性能直接相关,其中C/MCMB非对称电容体系表现出良好的高倍率充放电性能,电流密度从20mA/g增至200mA/g,其容量保持率在62%以上;在80mA/g时,C/MCMB非对称电容器的能量密度可为C/C双电层电容器的13.8倍。The asymmetric capacitors using nature graphite （G）, meso-carbon microbeads （MCMB）, meso-carbon fibre （MCF） as the anode and activated carbon as the cathode were assembled. Electrochemical tests show that the charge/discharge performance of these asymmetric systems is correlated with the lithium intercalation behavior of the graphite materials straightway. The C/MCMB asymmetric system shows a satisfactory high rate performance that its capacitance holding could reach to 62 % when the current density increasing from 20 mA/g to 200 mA/g, and its energy density is 13.8 times that of the electric double layer capacitor at a current density 80 mA/g.

关 键 词：电子技术 石墨类负极 非对称电化学电容器 双电层电容器 比能量 

分 类 号：TM53[电气工程—电器]