期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 7, 期 5, 页码 510-514出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2005.03.004
关键词
nanoporous carbon; non-aqueous electrolyte solution; double layer capacitor; ethylene carbonated ethyl acetate co-solvent; binary solvent systems
The electrical characteristics of the electrical double layer capacitors based on the nanoporous carbonl 1 M triethylmethylammonium tetrafluoroborate in ethylene carbonate mixed with dimethyl carbonate, ethyl methyl carbonate, diethyl carbonate, methyl formate, methyl acetate and ethyl acetate in the 1:1 volume ratio have been studied using the cyclic voltammetry and the electrochemical impedance spectroscopy methods. The specific series and parallel capacitances, phase angle. time constant, series and parallel resistances dependent on the binary solvent system used have been established. The region of ideal polarisability of nanoporous carbon electrodes Delta E >= 3.0 V for 1 M (C(2)H(5))(3)CH(3)NBF(4) in various binary non-aqueous solvent systems has been achieved. Specific conductivity values for 1 M TEMA solution in various organic carbonate-based electrolytes have been obtained at -40 degrees C < T < 50 degrees C and compared with the electrochemical data. (c) 2005 Elsevier B.V. All rights reserved.
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