Synthesis and characterization of an electrolyte system based on a biodegradable polymer

A polymer electrolyte system has been developed using a biodegradable polymer namely poly-ε-caprolactone (PCL) in combination with zinc triflate [Zn(CF3SO3)2] in different weight percentages and characterized during this investigation. Free-standing thin films of varying compositions were prepared by solution casting technique. The successful doping of the polymer has been confirmed by means of Fourier transform infrared spectroscopy (FTIR) by analyzing the carbonyl (C=O) stretching region of the polymer. The maximum ionic conductivity obtained at room temperature (25°C) was found to be 8.8x10–6 S/cm in the case of PCL complexed with 25 wt% Zn(CF3SO3)2 which is five orders of magnitude higher than that of the pure polymer host material. The increase in amorphous phase with an increase in salt concentration of the prepared polymer electrolyte has also been confirmed from the concordant results obtained from X-ray diffraction (XRD), differential scanning calorimetry (DSC) and scanning electron microscopic (SEM) analyses. Furthermore, the electrochemical stability window of the prepared polymer electrolyte was found to be 3.7 V. An electrochemical cell has been fabricated based on Zn/MnO2 electrode couple as an application area and its discharge characteristics were evaluated

Structural Aspects and Ion Transport Properties of a New Mixed System BiI 3 -Ag 2 WO 4

Abstract: An experimental attempt was made to analyze structural and ion transport properties in the case of a new mixed system viz., (BiI 3 ) y -(Ag 2 WO 4 ) 100-y where y = 10

<span style="font-size: 21.5pt;mso-bidi-font-size:14.5pt;font-family:"Times New Roman","serif"">Synthesis and evaluation of ionic transport in the mixed system CuI-Ag₂O-CeO₂ </span>

295-297<span style="font-size: 15.0pt;mso-bidi-font-size:8.0pt;font-family:" times="" new="" roman","serif""="">The present study is concerned with the preparation and investigation of ionic transport of the mixed system (CuI)x( 3Ag2O-2CeO2)100-x where x <span style="font-size:19.5pt;mso-bidi-font-size:12.5pt; font-family:" times="" new="" roman","serif""="">= <span style="font-size:15.0pt; mso-bidi-font-size:8.0pt;font-family:" times="" new="" roman","serif""="">40, 45, 50, 55, 60, 65 and 70 mol <span style="font-size:15.5pt;mso-bidi-font-size:8.5pt; font-family:" times="" new="" roman","serif""="">%, <span style="font-size:15.0pt; mso-bidi-font-size:8.0pt;font-family:" times="" new="" roman","serif""="">respectively. These materials were prepared via the solid state reaction route involving melting and quenching processes. The extent of ionic conductivity in the various compositions of the above system was determined by evaluating their silver ionic transport number. The observed silver ionic transport number in the above system indicates that the electronic conduction in these materials is negligible as compared with the ionic transport. </span

Application aspects of polymer electrolytes in solar cells

310-314<span style="mso-bidi-font-size: 8.0pt" lang="EN-GB">Dye-sensitized solar cells (DSSCs) have aroused intense interest owing to their easy fabrication, low cost, simple preparation procedures and high energy conversion efficiency. Considering the fact that leakage and volatilization of liquid electrolytes hinder their practical applications in the case of DSSCs, polymer electrolytes with high ionic conductivity, excellent thermal and long-term stability are being used as alternatives to liquid electrolytes. This review focuses mainly on recent progress witnessed in the field of quasi-solid-state electrolytes suitable for DSSCs. The dependence of photovoltaic performance on the polymer content within the electrolyte employed in DSSCs, their working principles as well as latest developments are also discussed. </span

Electrical Impedance and Structural Studies of Fast-Ion Conducting System (SbI 3 ) x -(Ag 2 WO 4 ) 1-x (0.1 ≤ x ≤ 0.5)

Abstract: This paper deals with the preparation and characterization of silver ion conducting system composed of (SbI 3 ) x -(Ag 2 WO 4 ) 1-x to identify the superionic conducting compositions. Powder samples of various compositions containing x=0.1, 0.2, 0.3, 0.4 and 0.5 mole fraction respectively were synthesized by rapid melt-quenching method. These samples were characterized using x-ray diffraction (XRD) and differential scanning calorimetry (DSC) studies. Their electrical transport properties were studied using complex impedance analysis. The realization of the typical ionic conductivity values of 5.7×1

Development of a new fast ionic system based on antimony iodide and silver phosphate

336-342A series of compositions of the mixed system (SbI3)100-x-(Ag3PO4)x, where x = 10, 20, 30, 40, 50 60, 70,80 and 90 mol% have been prepared by melt quench technique and characterized by means of X-ray diffraction (XRD), Differential scanning calorimetry (DSC), Fourier transform infrared (FTIR) spectra, X-ray photoelectron spectroscopy (XPS), ion transference number measurements and electrical conductivity studies involving complex impedance analysis. The room temperature electrical conductivity (σ298) data have suggested an increase value of conductivity with increasing concentration of the dopant namely, SbI3 attaining a maximum value of 4.210-3Scm-1 in the case of the typical composition having 40 mol % SbI3. It has also been noticed that the insertion of iodide ions would expand the network resulting in the opened up structure for the favourable migration of Ag+ions within AgI, which may be formed due to an ion exchange reaction between SbI3 and Ag3PO4 in accordance with hard and soft acids and bases (HSAB) principle. </span