Effect of NaI/I2 mediators on properties of PEO/LiAlO 2 based all-solid-state supercapacitors

Yijing Yin, Juanjuan Zhou, Azzam N. Mansour, Xiangyang Zhou

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

NaI/I2 mediators and activated carbon were added into poly(ethylene oxide) (PEO)/lithium aluminate (LiAlO2) electrolyte to fabricate composite electrodes. All solid-state supercapacitors were fabricated using the as prepared composite electrodes and a Nafion 117 membrane as a separator. Cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge/discharge measurements were conducted to evaluate the electrochemical properties of the supercapacitors. With the addition of NaI/I2 mediators, the specific capacitance increased by 27 folds up to 150 F g-1. The specific capacitance increased with increases in the concentration of mediators in the electrodes. The addition of mediators also reduced the electrode resistance and rendered a higher electron transfer rate between mediator and mediator. The stability of the all-solid-state supercapacitor was tested over 2000 charge/discharge cycles.

Original languageEnglish
Pages (from-to)5997-6002
Number of pages6
JournalJournal of Power Sources
Volume196
Issue number14
DOIs
StatePublished - Jul 15 2011

Fingerprint

electrochemical capacitors
Polyethylene oxides
solid state
Electrodes
electrodes
Capacitance
capacitance
composite materials
Composite materials
activated carbon
separators
ethylene oxide
Separators
Electrochemical impedance spectroscopy
Electrochemical properties
Activated carbon
Electrolytes
Cyclic voltammetry
electron transfer
Lithium

Keywords

  • NaI/I mediator
  • PEO/LiAlO/AC
  • Solid-state
  • Supercapacitor

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Physical and Theoretical Chemistry

Cite this

Effect of NaI/I2 mediators on properties of PEO/LiAlO 2 based all-solid-state supercapacitors. / Yin, Yijing; Zhou, Juanjuan; Mansour, Azzam N.; Zhou, Xiangyang.

In: Journal of Power Sources, Vol. 196, No. 14, 15.07.2011, p. 5997-6002.

Research output: Contribution to journalArticle

Yin, Yijing ; Zhou, Juanjuan ; Mansour, Azzam N. ; Zhou, Xiangyang. / Effect of NaI/I2 mediators on properties of PEO/LiAlO 2 based all-solid-state supercapacitors. In: Journal of Power Sources. 2011 ; Vol. 196, No. 14. pp. 5997-6002.
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