| 化学活化和化学-物理联合活化制备石油焦基活性炭 |
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| 引用本文： | 孙晓峰,王新宇,赖延清,张治安,夏阳.化学活化和化学-物理联合活化制备石油焦基活性炭[J].中南大学学报(自然科学版),2010,41(1). |
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| 作者姓名： | 孙晓峰 王新宇 赖延清 张治安 夏阳 |
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| 作者单位： | 中南大学,冶金科学与工程学院,湖南,长沙,410083 |
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| 基金项目： | 国家科技支撑计划项目 |
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| 摘 要： | 以石油焦为原料,采用化学活化和化学-物理联合活化2种活化工艺分别制备超级电容器用活性炭材料CA和CB。采用N2吸附法表征活性炭材料的BET比表面积及孔隙结构;通过恒电流充放电、循环伏安、交流阻抗等电化学测试方法,对2种活性炭在有机电解液中的电化学特性进行研究。研究结果表明,CA具有较高的收率、振实密度以及BET比表面积,分别可达61.28%,0.35g/cm3和2760m2/g;CB具有较高的中孔率和平均孔径,分别为24.1%和2.3nm;在充放电电流密度为1A/g时,CA的质量比电容量为137.8F/g;而CB表现出较好的功率特性,在20A/g时,质量比容量仅比1A/g时的质量比容量衰减4.7%。
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| 关 键 词： | 石油焦 化学活化 化学-物理联合活化 活性炭 超级电容器 |
Petroleum coke based activated carbon prepared from chemical activation and chemical-physical activation |
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| SUN Xiao-feng,WANG Xin-yu,LAI Yan-qing,ZHANG Zhi-an,XIA Yang.Petroleum coke based activated carbon prepared from chemical activation and chemical-physical activation[J].Journal of Central South University:Science and Technology,2010,41(1). |
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| Authors: | SUN Xiao-feng WANG Xin-yu LAI Yan-qing ZHANG Zhi-an XIA Yang |
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| Institution: | SUN Xiao-feng,WANG Xin-yu,LAI Yan-qing,ZHANG Zhi-an,XIA Yang (School of Metallurgical Science , Engineering,Central South University,Changsha 410083,China) |
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| Abstract: | Taking petroleum cokes as raw material, activated carbons CA and CB were prepared by chemical activation and chemical-physical activation. The BET specific surface area and the pore structure of activated carbons were analyzed by N2 adsorption method. Electrochemical properties of both samples, such as constant-current charge-discharge measurement, cyclic voltammogram, and electrochemical impedance spectroscopy were investigated in non-aqueous electrolytes. It can be found that CA shows higher yield, tap de... |
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| Keywords: | petroleum coke chemical activation chemical-physical activation activated carbon supercapacitor |
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