Journal of the Korean Electrochemical Society (전기화학회지)

The Korean Electrochemical Society (한국전기화학회)
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Polymeric Gel Electrolytes for Electric Double Layer Capacitors

전기이중층 캐패시터에 관한 폴리머 겔 전해액

  • Morita, Masayuki (Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Yamaguchi University) ;
  • Qiao, Jin-Li (Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Yamaguchi University)
  • Published : 2003.05.01
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Abstract

Proton conducting polymeric gels as the electrolytes of electrochemical capacitors have been prepared by two different methods: 1) swelling a polymethacrylate-based polymer matrix in aqueous solutions of inorganic and organic acids, and 2) polymerizing complexes of anhydrous acids and prepolymers with organic plasticizer. The FT-IR spectra strongly suggest that the carbonyl groups in the polymer matrix interact with protons from the doped acids. High ionic (proton) conductivity in the range of $6\times10^{-4}-4\times10^{-2}\;S\;cm^{-1}$ was obtained at room temperature for the aqueous gels. The non-aqueous polymer complexes showed rather low ionic conductivity, but it was about $10^{-3}\;S\;cm^{-1}\;at\;70^{\circ}C$ for the $H_3PO_4$ doped polymer electrolyte. The mechanisms of ion (proton) conduction in the polymeric systems are discussed.

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References

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