Nader Binesh

VTF to arrhenius crossover in temperature dependence of conductivity in (PEG)xNH4ClO4 polymer electrolyte

We have studied the temperature variation of conductivity and

Concentration-dependent NMR and conductivity studies of (PEG)xNH4ClO4

^1H

Effects of a plasticizer on protonic conductivity of polymer electrolyte (PEG)100NH4ClO41

NMR linewidth of

Investigation of the (PEG)xLiCl system using conductivity, DSC and NMR techniques

(PEG)_xNH_4ClO_4

Chemical shift spectroscopy of protonic conduction in layered and defect pyrochlore HNbWO6·xH2O

(x = 20, 30, 46, 100, 200, & 1000) polymer electrolyte systems. The temperature dependence of the conductivity shows two distinct behaviors, the low temperature VTF dependence crossing over to Arrhenius dependence at higher temperatures. The departure from the VTF behavior is found to be composition dependent. NMR spectra indicate the presence of large fractions of crystalline regions that start to melt around the crossover temperature. We understand the deviation from the VTF behavior as a consequence of this crystalline to elastomer transition.

Mechanism of protonic conduction in defect pyrochlore HNbWO6·xH2O using MAS NMR

Films of (PEG)(x)NH4ClO4 (x = 5 to 1000) were prepared and characterized. The physical properties are observed to be a sensitive function of concentration. Hygroscopicity increases as salt content increases. Conductivity peaks (sigma = 2.7 x 10(-6) S/cm) at x = 46. The H-1 NMR line width has a minimum at x = 46, while that of Cl-35 monotonically increases with salt concentration, indicating that the complex is essentially a protonic conductor.

Ionic transport in (PEG)xLiBr systems

We report on the effect of addition of low molecular weight

1H MAS NMR study of protonic conduction in layered HNbWO6 · xH2O (x = 1.5, 0.5)

(M_w =400)

(PEG)(x)NH4ClO4: A new polymeric fast proton conductor

PEG on protonic conduction of the solid polymer electrolyte

Erratum to ‘Effects of a plasticizer on protonic conductivity of polymer electrolyte (PEG)100NH4ClO41’: [Solid State Ionics 122 (1999) 291–299]☆

(PEG)_{100} NH_4 ClO_4