Synthesis, multinuclear NMR characterization and dynamic property of organic-inorganic hybrid electrolyte membrane based on alkoxysilane and poly(oxyalkylene) diamine

Diganta Saikia, Yu Chi Pan, Hsien Ming Kao

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Organic-inorganic hybrid electrolyte membranes based on poly(propylene glycol)-block-poly(ethylene glycol)-block-poly(propylene glycol) bis(2-aminopropyl ether) complexed with LiClO4 via the co-condensation of tetraethoxysilane (TEOS) and 3-(triethoxysilyl)propyl isocyanate have been prepared and characterized. A variety of techniques such as differential scanning calorimetry (DSC), Fourier transform infrared (FTIR) spectroscopy, alternating current (AC) impedance and solid-state nuclear magnetic resonance (NMR) spectroscopy are performed to elucidate the relationship between the structural and dynamic properties of the hybrid electrolyte and the ion mobility. A VTF (Vogel-Tamman-Fulcher)-like temperature dependence of ionic conductivity is observed for all the compositions studied, implying that the diffusion of charge carriers is assisted by the segmental motions of the polymer chains. A maximum ionic conductivity value of 5.3 × 10-5 Scm-1 is obtained at 30 °C. Solid-state NMR results provide a microscopic view of the effects of salt concentrations on the dynamic behavior of the polymer chains.

Original languageEnglish
Pages (from-to)253-274
Number of pages22
JournalMembranes
Volume2
Issue number2
DOIs
StatePublished - 2012

Keywords

  • Ionic conductivity
  • Organic-inorganic hybrid electrolyte
  • Poly(oxyalkylene) diamine
  • Segmental motion

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