Electrochemical behavior of wound supercapacitors with propylene carbonate and acetonitrile based nonaqueous electrolytes

来源期刊：中南大学学报(英文版)2009年第2期

论文作者：张治安 赖延清 李劼 刘业翔

文章页码：247 - 247

Key words：supercapacitor; electrolyte; capacitance; equivalent serial resistance; temperature

Abstract: The activated carbon wound supercapacitors with TEABF₄/propylene carbonate (PC) and TEABF₄/acetonitrile (AN) electrolytes were prepared. The effects of the electrolyte and temperature on the capacitance behavior were investigated by cyclic voltammetry (CV) and constant current charge-discharge. Compared with the PC-based supercapacitor, the AN-based supercapacitor has higher capacitance and lower equivalent serial resistance (R_ES) at discharge currents ranging from 5 to 1 000 mA and 25 ℃. Moreover, temperature effects are more prominent for PC-based supercapacitor than for AN-based supercapacitor. When the measurement temperature ranges from 60 ℃ to -40 ℃ the capacitance changes from 5.1 to 2.5 F and R_ES changes from 135 to 876 mΩ for the PC-based supercapacior, while the AN-based supercapacitor shows less change in capacitance and R_ES. Thus AN-based supercapacitor exhibits excellent power characteristics and temperature property.

基金信息：the National Natural Science Foundation of China
the National High Technology Research and Development Program of China