Manish S. Jayswal

Conductivity relaxation in Ag + ion conducting PEO-PMMA-PEG polymer blends

In this paper, the electrical conductivity and relaxation studies in two different temperature regions (T < Tm and T > Tm) on plasticized PEO–PMMA blend polymer electrolyte system with AgNO3 salt are reported. The polymer electrolyte system has been prepared by solution cast technique and characterized by X-ray diffraction and differential scanning calorimetry. The conduction and relaxation processes at various temperatures have been investigated in the framework of modulus formalism. The distribution of relaxation times is discussed using Argand plot. Variation in ionic conductivity of polymer blends is discussed with the increase of PEO as well as with temperature.

Conductivity and Dielectric Behavior of AgCF3SO3 Doped PEO Polymer Films

PEO containing AgCF3SO3 polymer films have been prepared by the hot press technique. The effect of salt concentration on the frequency-dependent conductivity properties of PEO: AgCF3SO3 complexes are investigated by impedance spectroscopy in the temperature range from 303 K to 328 K. The ac conductivity and dielectric properties of the prepared samples have been analyzed. The ac conductivity obeyes the universal power law and as the temperature increases, the feature of σ(ω) α ωn is more predominant. The dielectric permittivity is found to increase with temperature of the prepared samples. The imaginary part of electrical modulus, M” shows the formation of dispersion peak. Relaxation times for the ionic charges carriers were extracted from the peak maxima of imaginary part of modulus at various temperatures. The plot of relaxation times as a function of temperature shows Arrhenius type behavior.

Characterization studies of plasticized PEO-PMMA nano-composite polymer electrolyte system

Present study reports the characterization studies on silver based PEO-PMMA-PEG nano composite polymer electrolyte system, prepared by solution cast technique. The complexation among various constituents of polymer samples was carried by XRD and FTIR analysis. Thermal analysis of the samples was carried out by DSC study.

Dielectric And Conductivity In Silver‐Poly (ethylene oxide) Solid Polymer Electrolytes Dispersed With SiO2 Nanoparticles

Thin solid polymer electrolytes based on poly‐ethylene oxide (PEO) and silver triflate (AgCF3SO3) dispersed with nanoparticles (SiO2) have been prepared by solution casting technique. Electrical properties of PEO—AgCF3SO3‐SiO2 system were investigated by impedance spectroscopy. Further from impedance spectroscopy quantity such as complex dielectric constant and loss tangent were computed. Conductivity was studied for prepared films and the results are discussed.

The Consequence of LiCF3SO3 Concentrations and Swift Heavy O7+ Ion Irradiation on Thermal, Electrical and Relaxation Properties of [PVA(47)-PEO(47)-EC(6)-LiCF3 SO3(x)] Blend Electrolyte System

The blend specimens of [PVA (47) -PEO (47) -EC (6) -(LiCF 3 SO 3 )x] system are prepared for x = 3 to 11 wt % using solution cast technique. Portions of these blend films are exposed to swift heavy O 7+ ion radiations. Changes taking place in thermal, electrical and relaxation properties at various LiCF 3 SO 3 salt concentrations of all the blend specimens prior and after irradiation are thoroughly investigated. Relaxation time τ and Kohlrausch-William-Watts exponent β which throw light on the relaxation dynamics of the blend samples are calculated using modulus formalism. For both, prior as well as after irradiation, all these properties are found to be optimum at 9 wt% of salt concentration. However, irradiation has led to a significant enhancement in these properties of the blends at all salt concentrations. Scaling of modulus is carried out to analyse time-composition superposition principle. Relaxation dynamics is observed to be independent of salt concentration in cases of both, pristine and irradiated blends.

Conductivity enhancement in PVA−PEO−EC−LiCF−3SO3blends upon swift heavy O7+ion irradiation

In the present study, the PVA − PEO − EC − LiCF − 3 SO 3 blend system was prepared using solution cast technique. The system was prepared by taking 5 different concentrations LiCF 3 SO 3 in the range of 3wt% to 11 wt%, at a fixed proportion of the rest of the constituents. These blend films had been exposed to O 7+ radiations of 80 MeV at a current of 1pnA at a fluence of 1×1012 ions/cm2. The conductivity variation of the specimens is investigated using impedance spectroscopy wherein; the conductivity enhances drastically upon irradiation at all the concentrations of salt. The thermal characteristics of the blend films are being studied using Differential Scanning Calorimetry.

Conductivity enhancement in PVA−PEO−EC−LiCF−3SO3 blends upon swift heavy O7+ ion irradiation

In the present study, the PVA − PEO − EC − LiCF − 3 SO 3 blend system was prepared using solution cast technique. The system was prepared by taking 5 different concentrations LiCF 3 SO 3 in the range of 3wt% to 11 wt%, at a fixed proportion of the rest of the constituents. These blend films had been exposed to O 7+ radiations of 80 MeV at a current of 1pnA at a fluence of 1×1012 ions/cm2. The conductivity variation of the specimens is investigated using impedance spectroscopy wherein; the conductivity enhances drastically upon irradiation at all the concentrations of salt. The thermal characteristics of the blend films are being studied using Differential Scanning Calorimetry.

Effect of swift heavy ion irradiation on conductivity and relaxation time in PVA-PEO-EC-LiCF{sub 3}SO{sub 3} blends

In the present work, the PVA-PEO-EC-LiCF3SO3 blend specimens complexed with 3 wt% LiCF3SO3 salt have been irradiated, using swift heavy O7+ ion irradiation of 80MeV. These blend films have been irradiated with four different fluences ranging from 1×1011 to 3×1012 ions/cm2. Effect of radiations on conductivity, power law exponent and relaxation time of the films has been investigated in the present study. Conductivity is observed to enhance on increasing the fluence upto 3×1011 ions/cm2 and drops with further increment of fluence. However, all the irradiated blend specimens show higher conductivity as compared to pristine blend specimen.

Effect of Al2O3 and PEG on relaxation time in PEO-LiCF3SO3 polymer electrolytes

PEO-LiCF3SO3-Al2O3-PEG systems; one with varying amount of plasticizer and other with different amount of filler concentration were prepared using solution cast technique. The relaxation times derived from electrical modulus and ionic conductivity were compared in both the systems. Impedance spectroscopy has been used to study the effect of filler and plasticizer on conduction process at different temperatures from 303 to 323K and in the frequency range of 3.2MHz to 10Hz.

Effect of Plasticizer Concentration on the Conductivity in PAAM: AgNO3 Solid Polymer Electrolytes

Silver ion conducting polymer electrolyte films based on Poly acrylamide (PAAM) with EC (Ethylene Carbonate) as plasticizer have been prepared by the novel hot press technique. The complexation of polymer with AgNO3 salt has been confirmed by X‐ray diffraction and infrared studies. The electrical conductivity estimated using impedance spectroscopy is observed to be dependent on plasticizer (EC) concentration. The ac conductivity obeys the universal power law and as the temperature increases, the feature of σ(ω) α ωn is more predominant. The ionic conductivity as a function of temperature has been discussed.