Characterization of Microporous Activated Carbon Electrodes for Electric Double-layer Capacitors

查看全文 作　　者：MENGQing-han LIULing SONGHuai-[1]he

机构地区：[1]KeyLaboratoryofScienceandTechnologyofControllableChemicalReactionsBUCT,MinistryofEducation,BeijingUniversityofChemicalTechnology,Beijing100029,P.R.China

出　　处：《Chemical Research in Chinese Universities》索引2004年第20卷第5期,共4页

基　　金：Supported by the Young Teacher Scientific Research Foundation of BU CT(No.QN0 2 4 9) and National Natural ScienceFoundation(No.5 0 2 72 0 70 ) 摘　　要：Activated carbons(ACs) with a wide range of surface areas were made from petroleum coke by means of KOH activation. The electrochemical characterization was carried out for several activated carbons used as polarizable electrodes of electric double-layer capacitors(EDLCs) in an aqueous electrolytic solution. The porous structures and electrochemical double-layer capacitance of the activated carbons were investigated by virtue of nitrogen gas adsorption and constant current cycling(CCC) methods. The relationship among the surface area, pore volume of the activated carbons and specific double-layer capacitance was discussed. It was found that the specific capacitance of ACs increased linearly with the increase of surface area. The presence of mesopores in the activated carbons with very high surface area(>2000 m\+2/g) was not very effective for them to be used as EDLCs. The influence of chemical characteristics of the activated carbons on the double layer formation could be considered to be negligible. 关键词：多孔活性炭电极电偶层电容器比电容电化学特征氢氧化钾

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Characterization of Microporous Activated Carbon Electrodes for Electric Double-layer Capacitors

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