| NaOH活化法中碱炭比对孔结构和电化学性能的影响 |
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| 引用本文： | 谢应波,张维燕,张睿,成果,张传祥,乔文明,凌立成.NaOH活化法中碱炭比对孔结构和电化学性能的影响[J].材料科学与工艺,2009(5):732-737. |
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| 作者姓名： | 谢应波 张维燕 张睿 成果 张传祥 乔文明 凌立成 |
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| 作者单位： | 化学工程联合国家重点实验室;联合化学反应工程研究所;华东理工大学; |
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| 基金项目： | 国家自然科学基金资助项目(50672025) |
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| 摘 要： | 采用沥青焦为原料,以NaOH化学活化法制备出不同碱炭比(R)系列活性炭.用氮气吸附和脱附等温线计算出BET比表面积、DFT孔径分布及孔容,并且通过直流循环充放电、循环伏安等表征方法研究了其电化学性能.实验结果表明,R值对活性炭的BET比表面积、DFT孔径分布及孔容有良好的调控作用:当R=5时,其最大BET比表面积为1089m2/g,孔容达0.53cm3/g,当R=3时,其孔径分布在1.0-2.0nm百分比达36.2%;其直流循环充放电曲线较好,循环伏安曲线也近似矩形,表明具有良好双电子层电容器电极材料特性,在3mol/L的KOH电解液体系中,最大质量比电容、体积比电容、单位面积比电容分别达202F/g、143F/cm3、32.9μF/cm2;在1mol/L(C2H5)4NBF4/Propylene Carbonate(PC)电解液体系中,最大质量比电容、体积比电容、单位面积比电容分别达149F/g、107.3F/cm3、20μF/cm2.对KOH和(C2H5)4NBF4/PC电解质吸附的最佳孔径分别为1.3nm,1.5nm左右.
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| 关 键 词： | 活性炭 化学活化 比表面积 超级电容器 |
NaOH activation of petroleum coke:effect of hydroxide content on pore structure and electrochemical performances |
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| XIE Ying-bo,ZHANG Wei-yan,ZHANG Rui,CHENG Guo,ZHANG Chuan-xiang,QIAO Wen-ming,LING Li-cheng.NaOH activation of petroleum coke:effect of hydroxide content on pore structure and electrochemical performances[J].Materials Science and Technology,2009(5):732-737. |
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| Authors: | XIE Ying-bo ZHANG Wei-yan ZHANG Rui CHENG Guo ZHANG Chuan-xiang QIAO Wen-ming LING Li-cheng |
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| Affiliation: | XIE Ying-bo,ZHANG Wei-yan,ZHANG Rui,CHENG Guo,ZHANG Chuan-xiang,QIAO Wen-ming,LING Li-cheng(UNILAB,State Key Laboratory of Chemical Engineering,East China University of Science , Technology,Shanghai 200237,China) |
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| Abstract: | A series of petroleum coke-based activated carbons(ACs) were prepared by chemical activation method in different NaOH/petroleum coke ratios(R) .Pore properties of these activated carbons including the BET specific surface area,pore diameter,pore size distribution and pore volume were characterized by DFT method based on N2 adsorption/desorption isotherm.Electrochemical performances were characterized by chronopotentiograms,cyclic voltammetry,ad so on It is found that the NaOH/petroleum coke ratio(R) can con... |
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| Keywords: | activated carbon chemical activation specific surface area supercapacitors |
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