竹炭基超级电容器电极材料的制备和电化学性质  

PREPARATION AND ELECTROCHEMICAL PROPERTIES OF BAMBOO-BASED ELECTRODE MATERIALS FOR SUPERCAPACITOR

作　　者：白翔[1] 陈晓红[1] 张东升[2] 宋怀河[1] 岳永德[3] 

机构地区：[1]北京化工大学化工资源有效利用国家重点实验室,北京100029 [2]国家林业局林产工业规划设计院科技所,北京100010 [3]国际竹藤网络中心,北京100102

出　　处：《炭素技术》2009年第1期9-13,21,共6页Carbon Techniques

摘　　要：以生物质原材料竹材为原料,将炭化所得竹炭进一步进行物理(水蒸气)和化学(KOH)活化处理,制取竹炭基高比表面积活性炭。采用氮气吸脱附、扫描电镜等方法对竹炭基高比表面积活性炭孔结构、形态等进行表征;采用三电极体系,通过恒流充放电、循环伏安等方法,对竹炭基高比表面积活性炭作为超级电容器电极材料时的充放电特性及其比电容进行考察。结果表明:800℃KOH活化得到的竹基活性炭比表面积可以达到2365m2/g,孔径分布在1.8～3.5nm之间,比容量高达205F/g,并显示出很好的大电流充放电性能。In an attempt to develop high capability supercapacitors, activated carbons （AC） with high specific surface areas were fabricated from bamboo charcoal by pysieal （water steam） and chemical （KOH） ways, in which bamboo charcoal was made from bamboo as raw material through carbonization. The morphology and pore features of the activated carbons were characterized by nitrogen adsorption- desorption test and scanning electron microscopy. The capacitance performances of the activated carbons obtained as electrode for supercapacitor were discussed through the three-electrode system by galvanostatic charge-discharge test and cyclic vohammetry measurement. The results showed that the specific capacitance and the specific surface area of the AC treated by KOH at 800 ℃ could reach 205 F/g and 2 365 m^2/g, respectively, and the pore size was between 1.8 - 3.5 nm.

关 键 词：竹炭 超级电容器 物理和化学活化 

分 类 号：TQ424.1[化学工程] TM533[电气工程—电器]