炭前驱体对活性炭孔结构和电化学性能的影响  

The influence of carbon precursor on pore structure and electrochemical performance of activated carbon

作　　者：夏笑虹[1] 张东升[2] 刘洪波[1] 何月德[1] 

机构地区：[1]湖南大学材料科学与工程学院,湖南长沙410082 [2]国家林业局林产工业规划设计院,北京100010

出　　处：《功能材料》2010年第7期1253-1256,1260,共5页Journal of Functional Materials

基　　金：国家十一五科技支撑计划资助课题(2006BAD19B06)

摘　　要：分别以毛竹和石油焦为炭前驱体,采用KOH活化法制备超级电容器用高比表面积活性炭材料,考察了碱/炭比对不同炭前驱体所制得的活性炭的孔结构、吸附性能和电容性能的影响。结果表明,在相同的碱/炭比下,竹基活性炭孔径<2nm的微孔较发达,而石油焦基活性炭孔径在2～50nm的中孔率较高。在适宜的工艺条件下,以毛竹为炭前驱体可制得比表面积为2610.7m2/g,比电容为206F/g的活性炭材料;以石油焦为炭前驱体可制得比表面积为2597.9m2/g,比电容为213F/g的活性炭材料。High specific surface area activated carbons used for supercapacitors were prepared from bamboo char and petroleum coke by activation with KOH.The influences of the ratio of KOH to carbon on pore structure,adsorption behavior and capacity performance were investigated.Particular pore structure was showed in activated carbon when different carbon precurcor was used.Abundant micropores （2nm） were discovered in bamboo char-based AC,whereas a relative high mesoporosity was exhibited in petroleum coke based AC when at the same ratio of KOH to carbon.The KOH-activated bamboo char and petroleum coke carbons presented high BET surface area up to 2610.7 and 2597.9m2/g,respectively.When used for the electrodes of supercapacitors,they exhibited excellent capacitance characteristics in 30wt% H2SO4 aqueous electrolytes and showed high specific capacitances of 206 and 213F/g,respectively.

关 键 词：活性炭 炭前驱体 KOH活化 孔结构 电化学性能 

分 类 号：TM912.9[电气工程—电力电子与电力传动]