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.
出处
《炭素技术》
CAS
CSCD
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)
关键词
化学活化
超级电容器
能量密度
功率密度
Chemical activation
supereapacitor
energy density
power density
