title: Synthesis, Multinuclear NMR Characterization and Dynamic Property of Organic-Inorganic Hybrid Electrolyte Membrane Based on Alkoxysilane and Poly(oxyalkylene) Diamine.
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.
authors: Department of Chemistry, National Central University, Chung-Li 32001, Taiwan. diganta_s@yahoo.com.
authors: Diganta
authors: D
authors: Saikia
authors: Department of Chemistry, National Central University, Chung-Li 32001, Taiwan. yuchipan421@gmail.com.
authors: Yu-Chi
authors: YC
authors: Pan
authors: Department of Chemistry, National Central University, Chung-Li 32001, Taiwan. hmkao@cc.ncu.edu.tw.
authors: Hsien-Ming
authors: HM
authors: Kao