Abstract

Organic−inorganic hybrid electrolytes based on poly(propylene glycol)-block-poly(ethylene glycol)-block-poly(propylene glycol) bis(2-aminopropyl ether) (D2000) complexed with LiClO4 via the co-condensation of an epoxy trialkoxysilane and tetraethoxysilane have been prepared and characterized. The hybrid electrolytes thus obtained were rubbery thin films with good mechanical strength and a good degree of elasticity. Characterization was made by a variety of techniques including alternating current impedance, Fourier transform infrared spectroscopy, differential scanning calorimetry (DSC), multinuclear solid-state NMR spectroscopy, and pulse-gradient spin−echo (PGSE) NMR measurements. A VTF (Vogel−Tamman−Fulcher)-like temperature dependence of ionic conductivity was observed for all the compositions studied, implying that the diffusion of charge carriers was assisted by the segmental motions of the polymer chains. A maximum ionic conductivity value of 6.23 × 10-5 S/cm was obtained at 30 °C. 13C cross-polari...

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