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高等学校化学研究 ›› 2004, Vol. 20 ›› Issue (5): 627-630.

• Articles • 上一篇    下一篇

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

MENG Qing-han, LIU Ling, SONG Huai-he   

  1. Key Laboratory of Science and Technology of Controllable Chemical Reactions BUCT, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, P. R. China
  • 收稿日期:2003-07-15 出版日期:2004-10-24 发布日期:2011-08-06
  • 基金资助:

    Supported by the Young Teacher Scientific Research Foundation of BUCT(No.QN0249) and National Natural Science Foundation(No.50272070).

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

MENG Qing-han, LIU Ling, SONG Huai-he   

  1. Key Laboratory of Science and Technology of Controllable Chemical Reactions BUCT, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, P. R. China
  • Received:2003-07-15 Online:2004-10-24 Published:2011-08-06
  • Supported by:

    Supported by the Young Teacher Scientific Research Foundation of BUCT(No.QN0249) and National Natural Science Foundation(No.50272070).

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摘要： A ctivated 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 polariz able 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 m2/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: Micropore activated carbon, Electric double layer capacitor, Specific capacitance

Abstract: A ctivated 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 polariz able 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 m2/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.

Key words: Micropore activated carbon, Electric double layer capacitor, Specific capacitance