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电化学(中英文) ›› 2007, Vol. 13 ›› Issue (1): 44-49.  doi: 10.61558/2993-074X.2769

• 研究论文 • 上一篇    下一篇

1-乙基-3-甲基咪唑三氟乙酸盐作为电化学双电层电容器电解液的电化学性能

孙国华;李开喜;李强;范慧;谷建宇;   

  1. 中国科学院山西煤炭化学研究所炭材料重点实验室,中国科学院山西煤炭化学研究所炭材料重点实验室,中国科学院山西煤炭化学研究所炭材料重点实验室,中国科学院山西煤炭化学研究所炭材料重点实验室,中国科学院山西煤炭化学研究所炭材料重点实验室 山西太原030001,中国科学院研究生院,北京100039,山西太原030001,山西太原030001,中国科学院研究生院,北京100039,山西太原030001,山西太原030001
  • 收稿日期:2007-02-28 修回日期:2007-02-28 出版日期:2007-02-28 发布日期:2007-02-28

Electrochemical Performance of 1-ethyl-3-methylimidazolium Trifluoroacetic to the Electrolyte of Electrochemical Double Layer Capacitor

SUN Guo-hua1,2,LI Kai-xi1*,LI Qiang1,2,FAN Hui1,GU Jian-yu1   

  1. (1.Key Laboratory for Carbon Materials,Shanxi Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,Shanxi,China, 2.Graduate School of the Chinese Academy of Sciences,Beijing 100039,China
  • Received:2007-02-28 Revised:2007-02-28 Published:2007-02-28 Online:2007-02-28

摘要: 应用循环伏安法和直流恒流充放电研究了以离子液体1-乙基-3-甲基咪唑三氟乙酸盐([EMIm]CF3COO)和高比表面活性炭电极构成的电化学双电层电容器的电化学性能.实验表明,[EMIm]CF3COO具有高的比电容、良好的循环特性以及高的充放电效率.在离子液体稳定的电化学窗口内,比电容随电化学窗口的增加而增大.能量密度随电流和电化学窗口的增加逐渐提高,功率密度随电流的增加而减小、随电化学窗口的增加而增加,是一种优良的电化学双电层电解液.

关键词: 电化学双电层电容器, 循环伏安, 直流恒流充放电, 离子液体, 比电容

Abstract: The electrochemical performance of an Electrochemical Double Layer Capacitor consisted of higher specific surface area activated carbon and ionic liquid \CF3COO was investigated by constant current charge/discharge and cyclic voltammegrams(CV) methods.The results indicated that the \CF3COO had High specific capacitance,excellent cyclic characteristics and high charge/discharge efficiency.Specific capacitance of the EDLC increased with electrochemical window increase at the range of steady electrochemical window.Energy density increased with current and voltage increase,power density deduced with current increase but increased with electrochemical window increase.These conclusions revealed that the \CF3COO was very suitable for the electrolyte of EDLC.

Key words: electrochemical double layer capacitor, cyclic voltammegrams, constant current cycling, ionic liquid, specific capacitance

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