超级电容器用高比能量超级活性炭的结构与电化学性能  

STRUCTURES AND ELECTROCHEMICAL CHARACTERISTICS OF SUPER-ACTIVATED CARBON WITH HIGH-SPECIFIC CAPACITANCE FOR SUPERCAPACITORS

作　　者：成果[1] 金双玲[1] 张传祥[1] 凌立成[1] 

机构地区：[1]华东理工大学化学工程联合国家重点实验室,上海200237

出　　处：《炭素技术》2009年第4期16-20,共5页Carbon Techniques

基　　金：国家自然科学基金重点项目(50730003;50672025)

摘　　要：以沥青焦为原料,采用KOH活化法制备了具有高比表面积的超级活性炭(SAC),采用N2吸附、X射线衍射(XRD)和X射线光电子能谱(XPS)对其孔结构、微晶结构以及表面官能团进行了表征,研究了其作为超级电容器电极材料在1mol/L的Et4NBF4/碳酸丙烯酯电解液体系中的电化学特性。结果表明,所制活性炭的比表面积(SBET)达2893m2/g,孔径主要分布在1～4nm范围,其质量比电容(Cm)和能量密度分别达到190F/g和59W·h/kg。A super-activated carbon（SAC） with high specific area has been prepared from raw pitch coke using KOH as activation agent. The pore structure, graphite- like crystallite structure and surface functional groups of SAC were studied respectively with N2 adsorption/desorption isotherms, X-ray diffraction（XRD） and X-ray photoelectron spectroseopy（XPS）. The specific capacitance of SAC was measured in lmol/L Et4NBF4/propylene carbonate electrolyte. Results indicated that SAC has higher specific surface area （2893 m^2/g） and the pore size is mainly distributed in the range of 1 to 4 nm. The weight specific capacitance and energy density are 190 F/g and 59 Wh/kg respectively.

关 键 词：化学活化 超级电容器 能量密度 功率密度 

分 类 号：TQ424.1[化学工程]