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›› 2012, Vol. 12 ›› Issue (4): 665-671.

• 材料工程专栏 • 上一篇    下一篇

Preparation and Application of Nano-composite Poly(vinyl alcohol) Gel Electrolyte in Electrochemical Capacitor

陈赟 谭强强 徐宇兴   

  1. 中国科学院过程工程研究所多相复杂系统重点实验室 中国科学院过程工程研究所多相复杂系统重点实验室 中国科学院过程工程研究所多相复杂系统重点实验室
  • 收稿日期:2012-05-11 修回日期:2012-05-28 出版日期:2012-08-20 发布日期:2012-08-20
  • 通讯作者: 陈赟

Preparation and Application of Nano-composite Poly(vinyl alcohol) Gel Electrolyte in Electrochemical Capacitor

CHEN Yun TAN Qiang-qiang XU Yu-xing   

  1. State Key Laboratory of Multiphase Complex System, Institute of Process Engineering State Key Laboratory of Multiphase Complex System, Institute of Process Engineering State Key Laboratory of Multiphase Complex System, Institute of Process Engineering
  • Received:2012-05-11 Revised:2012-05-28 Online:2012-08-20 Published:2012-08-20
  • Contact: CHEN Yun

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摘要： A nano-composite polymer gel electrolyte was prepared using titanium oxide nanowire, poly(vinyl alcohol) (PVA), lithium salt and organic solvent N-methyl-2-pyrrolidone (NMP). The obtained electrolyte has the potential for application in electrochemical capacitor, the PVA in it is in an amorphous state. The ionic conductivities of electrolytes increased after addition of the nanowire, and the electrolyte with 3%(w) of nanowire exhibited the highest ionic conductivity of 3.2 mS/cm at 20℃, as measured by electrochemical impedance spectroscopy. The temperature dependence of the conductivity was found to be in agreement with the Arrhenius equation. Functioning as separator and electrolyte, this nano-composite PVA gel electrolyte was used to assemble the electrochemical capacitor with active carbon film as electrodes. The compositing of nanowire may extend the life of electrochemical capacitors as they keep more than 90% of their capacitance after 5000 cycles of charging and discharging.

关键词: nano-composite, polymer electrolyte, electrochemical capacitor, titanium oxide nanowire

Abstract: A nano-composite polymer gel electrolyte was prepared using titanium oxide nanowire, poly(vinyl alcohol) (PVA), lithium salt and organic solvent N-methyl-2-pyrrolidone (NMP). The obtained electrolyte has the potential for application in electrochemical capacitor, the PVA in it is in an amorphous state. The ionic conductivities of electrolytes increased after addition of the nanowire, and the electrolyte with 3%(w) of nanowire exhibited the highest ionic conductivity of 3.2 mS/cm at 20℃, as measured by electrochemical impedance spectroscopy. The temperature dependence of the conductivity was found to be in agreement with the Arrhenius equation. Functioning as separator and electrolyte, this nano-composite PVA gel electrolyte was used to assemble the electrochemical capacitor with active carbon film as electrodes. The compositing of nanowire may extend the life of electrochemical capacitors as they keep more than 90% of their capacitance after 5000 cycles of charging and discharging.

Key words: nano-composite, polymer electrolyte, electrochemical capacitor, titanium oxide nanowire

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