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Electrochemical behavior of wound supercapacitors with propylene carbonate and acetonitrile based nonaqueous electrolytes 被引量:3
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作者 张治安 赖延清 +1 位作者 李劼 刘业翔 《Journal of Central South University》 SCIE EI CAS 2009年第2期247-252,共6页
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 w... 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 (RES) 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 supereapacitor. When the measurement temperature ranges from 60 ℃to -40 ℃ the capacitance changes from 5.1 to 2.5 F and RES changes from 135 to 876 mΩ for the PC-based supercapacior, while the AN-based supercapacitor shows less change in capacitance and RES. Thus AN-based supercapacitor exhibits excellent power characteristics and temperature property. 展开更多
关键词 SUPERCAPACITOR electrolyte CAPACITANCE equivalent serial resistance temperature
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Normalized Area Solar Cell and Potential Applications
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作者 Marcel Pasquinelli Jean-Jacques Simon +2 位作者 Judikael Le Rouzo Fran?ois Flory Ludovic Escoubas 《Journal of Applied Mathematics and Physics》 2017年第5期1106-1112,共7页
Nowadays in laboratories and in industries, distribution of solar cells sizes could be very large, hence;for the first time it is rather difficult to compare photovoltaic parameters which are size dependent (current, ... Nowadays in laboratories and in industries, distribution of solar cells sizes could be very large, hence;for the first time it is rather difficult to compare photovoltaic parameters which are size dependent (current, serial resistance, shunt resistance...) and performances of these cells. Also, it will be useful for scale effect to extrapolate performances calculated on a unit size solar cell to commercial products, especially in the case of heterogeneous wafers used for the device. 展开更多
关键词 PHOTOVOLTAIC Solar Cell EFFICIENCY serial resistance Shunt resistance
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Preparation and properties of pitch carbon based supercapacitor 被引量:2
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作者 刘业翔 李晶 +2 位作者 赖延清 宋海申 张治安 《Journal of Central South University of Technology》 EI 2007年第5期601-606,共6页
Using the mesophase pitch as precursor, KOH and CO2 as activated agents, the activated carbon electrode material was fabricated by physical-chemical combined activated technique for supercapacitor. The influence of ac... Using the mesophase pitch as precursor, KOH and CO2 as activated agents, the activated carbon electrode material was fabricated by physical-chemical combined activated technique for supercapacitor. The influence of activated process on the pore structure of activated carbon was analyzed and 14 F supercapacitor with working voltage of 2.5 V was prepared. The charge and discharge behaviors, the properties of cyclic voltammetry, specific capacitance, equivalent serials resistance (ESR), cycle properties, and temperature properties of prepared supercapacitor were examined. The cyclic voltammetry curve results indicate that the carbon based supercapacitor using the self-made activated carbon as electrode materials shows the desired capacitance properties. In 1 mol/L Et4NBF4/AN electrolyte, the capacitance and ESR of the supercapacitor are 14.7 F and 60 mΩ respectively, The specific capacitance of activated carbon electrode materials is 99.6 F/g; its energy density can reach 2,96 W.h/kg under the large current discharge condition, There is no obvious capacitance decay that can be observed after 5000 cycles, The leakage current is below 0,2 mA after keeping the voltage at 2.5 V for l h, Meanwhile, the supercapacitor shows desired temperature property; it can be operated normally in the temperature ranging from -40 ℃to 70 ℃, 展开更多
关键词 carbon based supercapacitor physical-chemical combined activation specific capacitance equivalent serials resistance temperature property
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