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

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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 °C. Moreover, temperature effects are more prominent for PC-based supercapacitor than for AN-based supercapacitor. When the measurement temperature ranges from 60 °C to −40 °C 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.

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Authors and Affiliations

  1. School of Metallurgical Science and Engineering, Central South University, Changsha, 410083, China

    Zhi-an Zhang  (张治安), Yan-qing Lai  (赖延清), Jie Li  (李 劼) & Ye-xiang Liu  (刘业翔)

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  1. Zhi-an Zhang  (张治安)
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  2. Yan-qing Lai  (赖延清)
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  3. Jie Li  (李 劼)
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  4. Ye-xiang Liu  (刘业翔)
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Corresponding author

Correspondence to Zhi-an Zhang  (张治安).

Additional information

Foundation item: Project(20803095) supported by the National Natural Science Foundation of China; Project(2008AA03Z207) supported by the National High Technology Research and Development Program of China

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Zhang, Za., Lai, Yq., Li, J. et al. Electrochemical behavior of wound supercapacitors with propylene carbonate and acetonitrile based nonaqueous electrolytes. J. Cent. South Univ. Technol. 16, 247–252 (2009). https://doi.org/10.1007/s11771-009-0042-2

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  • DOI: https://doi.org/10.1007/s11771-009-0042-2

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