Conductivity study of polyvinyl alcohol/polyvinyl pyrrolidone (PVA/PVP)-KOH coatings system (original) (raw)
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Journal of Solid State Electrochemistry, 2020
This study searches the ion transport behavior and structural investigation of solid polymer electrolytes (SPEs) containing poly(vinyl alcohol) (PVA) and gum arabic (GA) with diverse amount of acetic acid for a possible application in electrochemical devices. The SPE system was prepared by the casting method and studied by electrical impedance spectroscopy (EIS), atomic force microscopy (AFM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). The best ionic conductivities of 2.22 × 10 −5 and 17.70 × 10 −5 S.cm −1 at 25 and 80°C, respectively, were measured for PVA/GA with 42 wt% of acetic acid. FTIR analysis confirmed PVA, GA, and acetic acid-OH,-C=O, and-COO − characteristic peaks. The ionic conductivity of PVA/GA SPE was affected by its ionic transport properties and amorphousness, which was revealed by deconvolution of XRD diffractograms. Additionally, AFM images proved predominantly homogeneous surface of the samples.
Journal of Non-Crystalline Solids, 2011
Several methods such as copolymerization, plasticization and blending etc., have been used to modulate the conductivity of polymer electrolytes. Polymer blending is one of the most important contemporary ways for the development of new polymeric materials and it is a useful technique for designing materials with a wide variety of properties. Polymer blend electrolyte has been prepared with different concentrations of PVA and PVP by solution casting technique using DMSO as solvent. The prepared films have been investigated by different techniques. The increase in amorphous nature of the polymer electrolytes has been confirmed by XRD analysis. The FTIR analysis reveals that the interchain hydrogen bonding within a PVA-PVP blends. The dielectric permittivity (ε*) and modulus (M*) have been calculated from the ac impedance spectroscopy in the frequency range 42 Hz-1 MHz and the temperature range 308-373 K. The maximum conductivity has been found to be 1.58 × 10 − 6 S cm − 1 at room temperature for 70PVA:30PVP concentration. The conductivity has been increased to 5.49 × 10 − 5 S cm − 1 when the temperature is increased to 373 K. The activation energy of all samples was calculated using the Arrhenius plot and it has been found to be 0.53 eV to 0.78 eV.
Journal of Power Sources, 2002
Solid polymer electrolyte films of polyvinylpyrrolidone (PVP), and poly(vinyl alcohol) (PVA) with KClO 3 and KClO 3 þ plasticizer (dimethyl formamide) have been prepared by the solution-cast technique. Various experimental techniques such as electrical conductivity (composition dependence) at room temperature and transport number measurements are used to characterize these polymer electrolyte films. Electrochemical cells of configuration K|(PVP þ PVA þ KClO 3)|(I 2 þ C þ electrolyte) and K|(PVP þ PVA þ KClO 3 þ plasticizer)| (I 2 þ C þ electrolyte) have been fabricated. The discharge characteristics of the cells are studied under a constant load of 100 kO. The open-circuit voltage, short-circuit current and discharge time for the plateau region are measured. The PVP þ PVA þ KClO 3 blend polymer electrolyte system with added plasticizer shows an increased discharge time with respect to the pure PVP þ PVA þ KClO 3 blend polymer electrolyte system.
Effect of Lithium Chloride Addition on the Electrical Conductivity of Polyvinyl Alcohol Films
In this Study, PVA/ (0.2, 0.4, 0.6, 0.8, 1) wt. % LiCl films were prepared by a casting method. The electrical conductivity of the mixed solutions increased with the addition LiCl to pure PVA solution. To demonstrate the effect of LiCl addition on the PVA films chemical bonds, FTIR investigations were held. Polymeric films D.C electrical conductivity had been studies under different temperatures (273-373 K. Results showed that DC electrical conductivity increased with increasing LiCl concentration and temperature. It was found that LiCl concentration decreased activation energies of the PVA films.
Power System Technology, 2024
In the past two decades, solid polymer electrolytes (SPEs) have attracted attention as a platform for electrochemical devices. Here polymer-based electrolytes have the advantage that they can be grown in a thin film, plus they are leak-proof. In the present work, we have used PVA:KI as the host polymer-salt complex with a composition of 85:15. Further, this PVA:KI complex dispersed with different wt% of CdS. Standard solution cast techniques have been used for thin film preparation. All prepared samples are characterized to study conductivity and structural changes. A maximum ionic conductivity of 2.47 X 10-7 S/cm was observed for 9wt% of CdS. Also, the band gap of these films was calculated and found to be between 2.4 to 2.9 eV. Also, the concentration and mobility of charge carriers were calculated to explain the change in conductivity pattern. This calculation was performed with the Schutt & Gerdes model. It is observed that the conductivity pattern mainly follows the concentration of charge carriers.
Conductivity and structural studies of PVA based mixed-ion composite polymer electrolytes
International Journal of Engineering & Technology
The solid membranes having different ratios of poly-vinyl alcohol (PVA), sodium perchlorate (NaClO4) and lithium perchlorate (LiClO4) were prepared using solution casting technique. The mixed-ion composite polymer electrolytes were characterized by X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FTIR) and conductivity measurement investigations. The XRD study confirms the amorphous nature of the mixed-ion composite polymer electrolytes. FTIR analysis has been used to characterize the structure of polymer which confirms the polymer and salt complex formation. The temperature dependent nature of ionic conductivity of the mixed-ion composite polymer electrolytes was determined by using conductivity meter (EC-035WP ERMA Inc, made in Japan). The ionic conductivity of the electrolyte was found in the range of 10-3 - 10-4 S/cm at room temperature.
JOURNAL OF ADVANCES IN PHYSICS
Polyvinyl alcohol- polypyrrole (PVA-PPy) nanocomposites with metal chlorides (FeCl3, NiCl2, CuCl2 and ZnCl2) have been synthesized by chemical oxidative polymerization method. These synthesized nanocomposites are characterized by using FTIR, X-ray diffraction, Transition electron microscope (TEM) and Conductivity measurement. TEM exhibit that all of the composites have uniform sizes and morphologies. The diameter of PVA/PPy nanocompsite is 58nm when the metals added to the PVA/PPy the diameters becomes smaller. The variation of electrical conductivity (log ?) with 1000/T for PVA/PPy nanocomposite with metal chlorides revealed that the increase in conductivity s at temperature (393K) with added metals can be attributed to the creation of induced charge carriers in PVA/PPy matrix
Ionic conduction in plasticized PVC/PAN blend polymer electrolytes
Ionics, 2008
Blended polymer electrolytes with poly(vinyl chloride) (PVC)–poly(acrylonitrile) (PAN) were prepared with different plasticizer concentrations and constant lithium perchlorate (LiClO4) ratio by the solution-casting technique. The structure and complexation of the prepared films were studied by X-ray diffraction and Fourier transform infrared spectroscopy. The effect of the plasticizer on the ionic conduction in these electrolytes was investigated using alternating current impedance measurement and discussed. The temperature-dependant ionic conductivity was carried out in the range 302–373 K. The prepared films were also examined by thermogravimetry/differential thermal analysis to determine their thermal stability.
DC-Ionic Conductivity and Dielectric Studies of PVP-CH 3 COOK Based Solid Polymer Electrolyte Films
Solid polymer electrolyte films were prepared with different wt% compositions of PVP-CH3COOK by solution cast technique. DC ionic conductivity measurements for the prepared nanocomposite films were performed by lab made conductivity four probe method. From the measurements the higher ionic conductivity was found to be 2.31x10-5 S/cm at 373 K for the composition 80PVP:20CH3COOK. Dielectric studies were performed on the prepared polymer films at room temperature in the frequency ranging between 5000 Hz and 50000 KHz to find the best optimum conductivity and electric relaxation process of the samples.
Journal of Applied Polymer Science, 2012
The goal of this study is to determine the electrically conductivity of the polymers poly(3,4-ethylenedioxythiophene) : poly(styrenesulfonate) : N-methyl-2-pyrrolidinone (PEDOT : PSS : NMP) and PEDOT : PSS when blended with polyvinyl alcohol (PVA). While the conducting polymers have high conductivity when not blended with PVA, they are brittle and difficult to spin-coat. Thus, the motivation for this study is to develop blends of these two conducting polymers with PVA to produce a material with optimized mechanical properties and that can also be spin-coated. The blends are produced using aqueous preparations of these materials. Mixtures of various weight percentages (wt %