椰壳活性炭基超级电容器的研制与开发  

The development of supercapacitors from coconut-shell activated carbon

作　　者：周鹏伟[1] 李宝华[1] 康飞宇[2] 曾毓群 

机构地区：[1]清华大学深圳研究生院新材料研究所,广东深圳518055 [2]清华大学材料科学与工程系,北京100084 [3]东莞新能源电子科技有限公司,广东东莞523080

出　　处：《新型炭材料》2006年第2期125-131,共7页New Carbon Materials

基　　金：国家自然基金项目(50272033);中国博士后科学基金(2003034118);粤港关键领域重点突破招标项目(2004A11008001);深圳市科技三项经费(041200001和JH200504270111A)~~

摘　　要：为了开发体积小巧、大功率放电性能优良的超级电容器,选用比表面积1 660m2/g的椰壳活性炭,采用扣式电池结构,通过恒电流充放电、电化学阻抗谱、扫描电子显微镜等方法对其用于超级电容器的性能进行了考察。结果表明,选用椰壳活性炭的最大比容量为79F/g,大功率放电性能优良。继而采用该种椰壳活性炭为电极活性物质,以6m o l/L KOH为电解液,外包装采用涂覆防腐蚀尼龙层的铝箔袋软包装组装了1V、70F的超级电容器,外形尺寸为35mm×43mm×6mm。测试结果表明其比功率密度为170W/kg或330W/L,比能量密度1W h/kg,大功率放电特性较好。In an attempt to develop small high-power supercapacitors a 1 V-70 F, 9 cm^3, coin-shaped supercapacitor was fabricated using coconut-shell activated carbon with a surface area of 1660 m^2/g and 6 mol/L KOH as the electrolyte. The outer package was made from laminated aluminum foil covered with a nylon insulating layer. The electrochemical behavior was measured by constant current charge/discharge and electrochemical impedance spectroscopy. A specific capacitance of 79 F/g was obtained. Results show that a specific power density of 170 W/kg or 330W/L, and a specific energy density of 1 Wh/kg can be reached with an excellent discharge performance under high current density.

关 键 词：活性炭 超级电容器 双电层电容器 

分 类 号：TM53[电气工程—电器]