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Membranes 2012, 2(2), 253-274; doi:10.3390/membranes2020253

Synthesis, Multinuclear NMR Characterization and Dynamic Property of Organic–Inorganic Hybrid Electrolyte Membrane Based on Alkoxysilane and Poly(oxyalkylene) Diamine

Department of Chemistry, National Central University, Chung-Li 32001, Taiwan
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Received: 27 April 2012 / Revised: 1 June 2012 / Accepted: 4 June 2012 / Published: 13 June 2012
(This article belongs to the Special Issue Membranes for Electrochemical Energy Applications)
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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. View Full-Text
Keywords: organic–inorganic hybrid electrolyte; ionic conductivity; poly(oxyalkylene) diamine; segmental motion organic–inorganic hybrid electrolyte; ionic conductivity; poly(oxyalkylene) diamine; segmental motion
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Saikia, D.; Pan, Y.-C.; Kao, H.-M. Synthesis, Multinuclear NMR Characterization and Dynamic Property of Organic–Inorganic Hybrid Electrolyte Membrane Based on Alkoxysilane and Poly(oxyalkylene) Diamine. Membranes 2012, 2, 253-274.

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