Ion Conducting studies in PEO:NaI and its composite : Carrier density approach

2020 ◽  
Vol 13 ◽  
Author(s):  
Kushal Mehrotra ◽  
Divya Singh ◽  
Bhaskar Bhattacharya
Keyword(s):  
Electrical Conductivity ◽  
Polyethylene Oxide ◽  
Polymer Electrolytes ◽  
Carrier Density ◽  
Sodium Iodide ◽  
Complex Impedance ◽  
Charge Concentration ◽  
Ion Conducting ◽  
Composite Carrier

: The modulation in electrical conductivity of polymer electrolyte, viz., polyethylene oxide (PEO) complexed with different concentration of sodium iodide is studied. The role of mobility and charge concentration in electrical conductivity of polymer electrolytes is established. The effect on charge concentration, mobility and conductivity of PEO+NaI film by adding three different concentration of silicon is reported. The polarized optical microscopy (POM) is used to study the morphology of the surface of PEO, PEO+NaI films dispersed with Si. The complex impedance spectroscopy (CIS) method is used to measure the electrical conductivity of film.

Complex impedance and conductivity of agar-based ion-conducting polymer electrolytes

2015 ◽  
Vol 119 (1) ◽  
pp. 387-396 ◽  
Author(s):  
A. C. Nwanya ◽  
C. I. Amaechi ◽  
A. E. Udounwa ◽  
R. U. Osuji ◽  
M. Maaza ◽  
...  
Keyword(s):  
Conducting Polymer ◽  
Polymer Electrolytes ◽  
Complex Impedance ◽  
Ion Conducting ◽  
Ion Conducting Polymer

Conductivity and dielectric studies of Li3+-irradiated PVP-based polymer electrolytes

2018 ◽  
Vol 30 (8) ◽  
pp. 978-985 ◽  
Author(s):  
Divya Singh ◽  
D Kanjilal ◽  
GVS Laxmi ◽  
Pramod K Singh ◽  
SK Tomar ◽  
...  
Keyword(s):  
Polymer Electrolyte ◽  
Polymer Electrolytes ◽  
Sodium Iodide ◽  
Ion Beam ◽  
Charge Carriers ◽  
Detailed Characterization ◽  
Before And After ◽  
Ion Conducting ◽  
Ion Conducting Polymer

Poly(vinylpyrrolidone) (PVP) complexed with sodium iodide (NaI) is synthesized to investigate the ionic conductivity of alkaline-based polymer electrolytes. In this article, we report the modification of electrical properties of a new ion-conducting polymer electrolyte, namely, PVP complexed with NaI. Modification of polymer electrolyte was carried out before and after the exposure of films by bombarding them at different fluences with respect to Li3+ ion beam at 60 MeV. The preparation and detailed characterization of PVP:NaI is being reported. Further, a correlation with conductivity and dielectric constant has also been established. The modulation in the conductivity is explained in terms of number of charge carriers ( n) and its mobility ( μ), which confirms the behavior of the polymer electrolyte as an alternative strategy to improve the conductivity.

scholarly journals Effect of Plasticizers on Structural and Dielectric Behaviour of [PEO + (NH4)2C4H8(COO)2] Polymer Electrolyte

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Kamlesh Pandey ◽  
Nidhi Asthana ◽  
Mrigank Mauli Dwivedi ◽  
S. K. Chaturvedi
Keyword(s):  
Electrical Conductivity ◽  
Relaxation Time ◽  
Impedance Spectroscopy ◽  
Polymer Electrolyte ◽  
Polyethylene Oxide ◽  
Polymer Electrolytes ◽  
Space Charge Polarization ◽  
Electrical Behavior ◽  
Different Types ◽  
Dispersive Nature

Improvements in ion transport property of polyethylene-oxide- (PEO-) based polymer electrolytes have been investigated, using different types of plasticizers. The effects of single and coupled plasticizers [i.e., EC, (EC + PC), and (EC + PEG)] on structural and electrical behavior of pristine electrolyte were studied by XRD, SEM technique, and impedance spectroscopy. The electrical conductivity of the best plasticized system was found to be 4 × 10−6 S/cm. Argand plots show dispersive nature of relaxation time or inhomogeneous space charge polarization of plasticized polymer electrolyte.

Effect of Additives on the Electrical, Structural and Mechanical Property Modification of PEO-NH4HF2 Based Polymer Electrolytes

2020 ◽  
Vol 13 ◽  
Author(s):  
Jitender Paul Sharma
Keyword(s):  
Mechanical Property ◽  
Ionic Conductivity ◽  
Propylene Carbonate ◽  
Polyethylene Oxide ◽  
Polymer Electrolytes ◽  
Fumed Silica ◽  
Testing Machine ◽  
Complex Impedance ◽  
Effect Of Additives ◽  
Ammonium Bifluoride

: The ionic conductivity as well as dielectric studies of polymer electrolytes consisting of polyethylene oxide (PEO) and different (x wt%) of ammonium bifluoride (NH4HF2) (x=1, 2.5, 5, 10 and 15 wt %) have been measured using complex impedance spectroscopic technique. It was found that the polyethylene oxide composed of 10 wt% ammonium bifluoride exhibited the higher conductivity of 5.96x10-6 S/cm as compared to other concentrations of salt at room temperature. Effect of additives i.e. nano sized fumed silica concentration as nano filler and propylene carbonate (PC) concentration as plasticizer on electrical, structural as well as mechanical property studies of polymer electrolytes has also been studied. The maximum conductivity achieved was 1.55× 10-4  S/cm in case of plasticized nanocomposite polymer electrolytes with the simultaneous presence of 3 wt% fumed silica and 0.3 ml propylene carbonate. The variation of ionic conductivity at different temperatures and activation energy values of different polymer electrolytes were also measured. X-ray diffraction (XRD) and differential scanning calorimetry/thermogravimetric analysis (DSC/TGA) studies have been taken to observe the effect of additives on crystalline phase, crystallite size, melting temperature and weight loss of different polymer electrolytes. The effect of additives on the mechanical properties (tensile strength, modulus of elasticity and % elongation at break) of different polymer electrolytes has also been studied by Universal Testing Machine (UTM).

Effect of MCl (M = Na, K) addition on microstructure and electrical conductivity of forsterite

2020 ◽  
Vol 92 (1) ◽  
pp. 10901
Author(s):  
Saloua El Asri ◽  
Hamid Ahamdane ◽  
Lahoucine Hajji ◽  
Mohamed El Hadri ◽  
Moulay Ahmed El Idrissi Raghni ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Electrical Conductivity ◽  
Single Phase ◽  
Sol Gel ◽  
Complex Impedance ◽  
Transmission Spectra ◽  
Electrical Measurements ◽  
Cation Type ◽  
Edx Analyses ◽  
The Fourier Transform

Forsterite single phase powder Mg2SiO4 was synthesized by sol–gel method alongside with heat treatment, using two different cation alkaline salts MCl as mineralizers (M = Na, K) with various mass percentages (2.5, 5, 7.5, and 10 wt.%). In this work, we report on the effect of the cation type and the added amount of used mineralizer on microstructure and electrical conductivity of Mg2SiO4. The formation of forsterite started at 680–740  °C and at 630–700  °C with KCl and NaCl respectively, as shown by TG-DTA and confirmed by XRD. Furthermore, the Fourier transform infrared (FTIR) transmission spectra indicated bands corresponding to vibrations of forsterite structure. The morphology and elemental composition of sintered ceramics were examined by SEM-EDX analyses, while their densities, which were measured by Archimedes method, increased with addition of both alkaline salts. The electrical measurements were performed by Complex Impedance Spectroscopy. The results showed that electrical conductivity increased with the addition of both mineralizers, which was higher for samples prepared with NaCl than those prepared with KCl.

ROLE OF ADDED PHOSPHOGYPSUM AND HUMIC ACIDS IN THE KINETIC RELEASE OF SALT FROM SALT AFFECTED SOIL (SALINE – SODIC)

2020 ◽  
pp. 15-27
Keyword(s):  
Electrical Conductivity ◽  
Humic Acids ◽  
Release Rate ◽  
Release Kinetics ◽  
Sodium Adsorption Ratio ◽  
Salt Affected Soil ◽  
Two Factors ◽  
Dissolved Ions ◽  
Kinetic Release

In order to study the effect of phosphogypsum and humic acids in the kinetic release of salt from salt-affected soil, a laboratory experiment was conducted in which columns made from solid polyethylene were 60.0 cm high and 7.1 cm in diameter. The columns were filled with soil so that the depth of the soil was 30 cm inside the column, the experiment included two factors, the first factor was phosphogypsum and was added at levels 0, 5, 10 and 15 tons ha-1 and the second-factor humic acids were added at levels 0, 50, 100 and 150 kg ha-1 by mixing them with the first 5 cm of column soil and one repeater per treatment. The continuous leaching method was used by using an electrolytic well water 2.72 dS m-1. Collect the leachate daily and continue the leaching process until the arrival of the electrical conductivity of the filtration of leaching up to 3-5 dS m-1. The electrical conductivity and the concentration of positive dissolved ions (Ca, Mg, Na) were estimated in leachate and the sodium adsorption ratio (SAR) was calculated. The results showed that the best equation for describing release kinetics of the salts and sodium adsorption ratio in soil over time is the diffusion equation. Increasing the level of addition of phosphogypsum and humic acids increased the constant release velocity (K) of salts and the sodium adsorption ratio. The interaction between phosphogypsum and humic acids was also affected by the constant release velocity of salts and the sodium adsorption ratio. The constant release velocity (K) of the salts and the sodium adsorption ratio at any level of addition of phosphogypsum increased with the addition of humic acids. The highest salts release rate was 216.57 in PG3HA3, while the lowest rate was 149.48 in PG0HA0. The highest release rate of sodium adsorption ratio was 206.09 in PG3HA3, while the lowest rate was 117.23 in PG0HA0.

Transport and fluctuations in nonlinear-dissipative systems: role of interparticle collisions

1999 ◽  
Vol 4 ◽  
pp. 31-86 ◽  
Author(s):  
R. Katilius ◽  
A. Matulionis ◽  
R. Raguotis ◽  
I. Matulionienė
Keyword(s):  
Electric Fields ◽  
Carrier Density ◽  
Experimental Results ◽  
Dissipative Systems ◽  
Doped Semiconductors ◽  
Electron Diffusion ◽  
Electron Collisions ◽  
Electric Noise ◽  
Diffusion Phenomena

The goal of the paper is to overview contemporary theoretical and experimental research of the microwave electric noise and fluctuations of hot carriers in semiconductors, revealing sensitivity of the noise spectra to non-linearity in the applied electric field strength and, especially, in the carrier density. During the last years, investigation of electronic noise and electron diffusion phenomena in doped semiconductors was in a rapid progress. By combining analytic and Monte Carlo methods as well as the available experimental results on noise, it became possible to obtain the electron diffusion coefficients in the range of electric fields where inter-electron collisions are important and Price’s relation is not necessarily valid. Correspondingly, a special attention to the role of inter-electron collisions and of the non-linearity in the carrier density while shaping electric noise and diffusion phenomena in the non-equilibrium states will be paid. The basic and up-to-date information will be presented on methods and advances in this contemporary field - the field in which methods of non-linear analytic and computational analysis are indispensable while seeking coherent understanding and interpretation of experimental results.

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