Proton conducting polymer electrolytes based on PVdF-PVA with NH4NO3

2013 ◽  
Vol 33 (4) ◽  
pp. 315-322 ◽  
Author(s):  
Muthuvinayagam Muthiah ◽  
Gopinathan Chellasamy ◽  
Rajeswari Natarajan ◽  
Selvasekarapandian Subramanian ◽  
Sanjeeviraja Chinnappa
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Conducting Polymer ◽  
Polymer Blend ◽  
Polymer Electrolytes ◽  
Vinylidene Fluoride ◽  
Xrd Analysis ◽  
Dielectric Behavior ◽  
Poly Vinyl Alcohol ◽  
Casting Technique

Abstract Conducting polymer electrolyte films were prepared based on poly (vinylidene fluoride) (PVdF) and poly (vinyl alcohol) (PVA) by using a solution casting technique. The optimized PVdF-PVA polymer blend ratio was doped with different concentrations of NH4NO3 and polymer blend electrolytes were prepared. The increase in amorphous nature of the polymer electrolytes was confirmed by X-ray diffraction (XRD) analysis and optical microscopic studies. The complex formation between the polymers and the salt was confirmed by Fourier transform infrared spectroscopy (FTIR) analysis. The ac impedance studies were performed to evaluate the ionic conductivity of the polymer electrolyte membranes in the range 303–333 K and the highest ionic conductivity was found to be 2.91×10-4 S/cm at ambient temperature for PVdF-PVA-NH4NO3 (80:20:25 MWt%) polymer electrolyte, with activation energy Ea=0.7 eV. The dielectric behavior of the electrolytes was also studied.

Structural, transport, morphological, and thermal studies of nano barium titanate–incorporated magnesium ion conducting solid polymer electrolytes

2021 ◽  
pp. 096739112110473
Author(s):  
Jayanthi S ◽  
Kalapriya K
Keyword(s):  
Ionic Conductivity ◽  
Barium Titanate ◽  
Polymer Electrolytes ◽  
Vinylidene Fluoride ◽  
Thermal Studies ◽  
Xrd Analysis ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Casting Technique ◽  
Ion Conducting

A new series of nanocomposite polymer electrolytes (NCPEs) was prepared using poly(vinylidene fluoride–co–hexafluoro propylene) P(VdF-HFP) as polymer, magnesium triflate (MgTr) as salt and nano-sized barium titanate (BaTiO3) (<100 nm) as nanofiller via traditional solution casting technique. Decrease in crystalline nature of the samples due to the incorporation of nano BaTiO3 was revealed through X-ray diffraction (XRD) analysis. From AC impedance spectroscopy, maximum conductivity of 4.11 × 10−4 Scm−1 was attained for the addition of 6 wt% of nano BaTiO3 to the P(VdF-HFP)/MgTr matrix. Dielectric studies were found to be in accordance with the ionic conductivity studies. For the most highly conducting sample, a greater number of mountain valley pattern was observed from Atomic Force Microscopy (AFM) analysis. Thermal stability of the sample, P(VdF-HFP)/MgTr/BaTiO3 (6 wt%) (which possessed maximum ionic conductivity) was observed through TG/differential thermal analysis studies. All these results suggested that these materials are favorable and find application in practical electrochemical devices.

Influence of Blend on the Conductivity in Poly(Ethyl Methacrylate)/Poly(Vinyl Acetate) Based Polymer Electrolytes

2017 ◽  
Vol 17 ◽  
pp. 202-216
Author(s):  
R. Premila ◽  
S. Rajendran ◽  
K. Kesavan
Keyword(s):  
Ionic Conductivity ◽  
Vinyl Acetate ◽  
Polymer Blend ◽  
Polymer Electrolytes ◽  
Ac Impedance ◽  
Dielectric Behavior ◽  
Solid Polymer ◽  
Casting Technique ◽  
Ethyl Methacrylate ◽  
Ac Impedance Analysis

The polymer blend electrolytes composed of poly (ethyl methacrylate)(PEMA) and Poly (vinyl acetate)(PVAc) as host polymer and lithium perchlorate (LiClO4) as a salt are synthesized by solvent casting technique. The polymer membranes with different wt% of PEMA and PVAc are subjected to AC impedance analysis for the investigation of ionic conductivity. The maximum ionic conductivity of 3.541 X 10- 5Scm- 1 at 303K is reported for PEMA/PVAC (70/30wt%) –LiClO4 (8wt%) polymer blend electrolyte system.The complexation has been confirmed by XRD and FTIR techniques. The glass transition temperature (Tg) of the blend polymer electrolytes has been obtained from DSC measurements. The SEM micrographs show the surface morphology of the prepared samples. The electrochemical stability of the sample exhibiting high conductivity has been carried out using linear sweep voltammetry (LSV) and cyclic voltammetry (CV) measurements. The potential window has been found to be-2.5 to +2.5 V. The lithium transference number evaluated using chronoamperometry technique results in a value of 0.90. The dielectric behavior of the solid polymer blend electrolytes has been analyzed as a function of frequency and temperature. The dc conductivity values obtained from the conductance spectra match the ac impedance results. The photoluminescence spectra that contain information about the local free volume of the prepared samples justify the conductivity results. The two and three dimensional images of the maximum ionic conducting sample exhibit numerous micropores.

Electrical Analysis of Cornstarch-Based Polymer Electrolyte Doped with NaCl

2017 ◽  
Vol 268 ◽  
pp. 347-351 ◽  
Author(s):  
Syakirah binti Shahrudin ◽  
Azizah Hanom Ahmad
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Polymer Electrolytes ◽  
Room Temperature ◽  
Transport Number ◽  
Corn Starch ◽  
Solution Casting ◽  
Arrhenius Model ◽  
Casting Technique ◽  
Solution Casting Technique

Corn starch (CS) – sodium chloride (NaCl) based polymer electrolytes were prepared by solution casting technique. At room temperature, CS-NaCl film with ratio of 70 wt. % - 30 wt. % demonstrates the highest ionic conductivity in the range of (1.72 ± 0.12) x10-5 Scm-1. Temperature-dependence ionic conductivity study follows Arrhenius model and using related plot, the activation energy for highest conducting composition is 0.16eV. The transport number measurement studies confirmed that the ionic conductivity of this polymer electrolyte is due to ions. Fourier transform infrared spectroscopy (FTIR) analysis proved the interaction between CS and NaCl.

The Effect of LiCF3SO3 Complexed MG30-PEMA Blend Solid Polymer Electrolyte

2015 ◽  
Vol 1107 ◽  
pp. 158-162
Author(s):  
Siti Fadzilah Ayub ◽  
R. Zakaria ◽  
K. Nazir ◽  
A.F. Aziz ◽  
Muhd Zu Azhan Yahya ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Polymer Blend ◽  
Solid Polymer Electrolyte ◽  
Electrochemical Impedance ◽  
Solid Polymer ◽  
Casting Technique ◽  
Concentration Maximum ◽  
Conductivity Increase ◽  
Maximum Conductivity

In this work, solid polymer electrolyte compose of blended 30% poly (methyl methacrylate) grafted natural rubber (MG30)-poly (ethyl methacrylate) (PEMA) polymer blend doped with Lithium trimethasulfonate (LiCF3SO3) films were prepared by solution casting technique. . FTIR analysis showed that the interactions between lithium ions and oxygen atoms occur at the carbonyl functional group C=O where there is shifting in wavenumber from 1728 cm-1 of pure blend to lower wavenumber of blended MG30-PEMA on the MMA structure in both MG30 and PEMA. DSC analysis showed miscibility of polymer blend. From Electrochemical Impedance Spectrocopy analysis, ionic conductivity increase with the increasing of salt concentration. Maximum conductivity at room temperature is 9.20 x 10-6 Scm-1 was obtained when 30 wt% of LiCF3SO3 was added into the system. Ionic conductivity temperature dependence plots found obeys the Arrhenius rule.

scholarly journals Development and Characterization of Poly(1-vinylpyrrolidone-co-vinyl acetate) Copolymer Based Polymer Electrolytes

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Nurul Nadiah Sa’adun ◽  
Ramesh Subramaniam ◽  
Ramesh Kasi
Keyword(s):  
Ionic Liquid ◽  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Vinyl Acetate ◽  
Polymer Electrolytes ◽  
Morphological Properties ◽  
X Ray Diffraction ◽  
Casting Technique ◽  
Solution Casting Technique

Gel polymer electrolytes (GPEs) are developed using poly(1-vinylpyrrolidone-co-vinyl acetate) [P(VP-co-VAc)] as the host polymer, lithium bis(trifluoromethane) sulfonimide [LiTFSI] as the lithium salt and ionic liquid, and 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide [EMImTFSI] by using solution casting technique. The effect of ionic liquid on ionic conductivity is studied and the optimum ionic conductivity at room temperature is found to be 2.14 × 10−6 S cm−1for sample containing 25 wt% of EMImTFSI. The temperature dependence of ionic conductivity from 303 K to 353 K exhibits Arrhenius plot behaviour. The thermal stability of the polymer electrolyte system is studied by using thermogravimetric analysis (TGA) while the structural and morphological properties of the polymer electrolyte is studied by using Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction analysis (XRD), respectively.

Effects of Different Concentration in (w/v)% of Carboxymethyl Iota-Carrageenan Based Green Polymer Electrolyte

2015 ◽  
Vol 1107 ◽  
pp. 205-210
Author(s):  
Fatihah Najirah Jumaah ◽  
Azizan Ahmad ◽  
Hussein Hanibah ◽  
Nadhratun Naiim Mobarak ◽  
M.A. Ghani
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Electrochemical Impedance ◽  
Amorphous Region ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
Volume Percentage ◽  
Casting Technique ◽  
Solution Casting Technique ◽  
Green Polymer

The effect of different concentrations in weight per volume percentage, (w/v)% of iota-carrageenan and carboxymethyl-iota carrageenan used as the green polymer electrolyte has been studied. The polymer electrolyte films were prepared by solution casting technique. Different concentration in the range from 1.0 – 6.0 (w/v)% were dissolved in fix volume of acetic acid which act as solvent. The films have been analyzed through attenuated Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) measurement and electrochemical impedance spectroscopy (EIS). The EIS results showed that the ionic conductivity increased as the concentration of the polymer increases. In comparison between iota-carrageenan and carboxymethyl iota-carrageenan, carboxymethyl-iota carrageenan showed better results due to the presence of more active site. The highest conductivity achieved by iota-carrageenan and carboxymethyl iota-carrageenan were 3.45 × 10-6S cm-1and 9.57 × 10-4S cm-1at the concentration 3.0 and 4.0 (w/v)% , respectively. From the FTIR spectra, it depicts that the intensity of significant peaks of ether and carboxylate group increases as the concentration of polymer increases. The XRD analysis showed that as the concentration of polymer increase, the amorphous region in the films would be enhanced. This study showed that the concentration play significant role in the ionic conductivity improvement.

scholarly journals Impact of polymer blending on Ionic Conduction Mechanism and Dielectric Properties of Sodium based PEO-PVdF Solid Polymer Electrolyte Systems

2021 ◽  
Author(s):  
Yalla Mallaiah ◽  
VENKATA RAMANA JEEDI ◽  
R. Swarnalatha ◽  
A. Raju ◽  
S. Narender Reddy ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Polymer Blend ◽  
Vinylidene Fluoride ◽  
Ionic Conduction ◽  
Solid Polymer ◽  
Electron Microscopic ◽  
Constant Weight ◽  
Weight Percentage

Abstract Solid polymer blend electrolyte systems have been prepared with Poly (ethylene oxide) (PEO), Poly (Vinylidene fluoride) (PVDF) and complexed with Sodium Nitrate (NaNO 3 ) salt by using solution cast technique. The complexion of salt with polymer blend has been confirmed by X-Ray diffraction, Fourier Transmission Infrared Spectroscopy and scanning electron microscopic studies. AC and DC conductivity studies of these polymer blends were carried out by changing the weight percentages of PEO and PVDF with a constant weight percentage of NaNO 3 . The electric modulus (M ' ) and the dielectric properties for all the polymer blend systems have been investigated with impedance spectroscopic analysis as a function of frequency ranging from 100- 30MHz. The ionic conductivity of the blend polymer electrolyte systems followed Arrhenius behaviour and the maximum ionic conductivity was observed for PEO:PVdF:NaNO 3 (80:20:5) at room temperature which is attributed to the formation of the amorphous phase.

Structural and Ionic Conductivity Studies of CMC Based Polymerelectrolyte Doped with NH4Cl

2015 ◽  
Vol 1107 ◽  
pp. 247-252 ◽  
Author(s):  
Nur Hidayah Ahmad ◽  
M.I.N. Isa
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Ammonium Chloride ◽  
Polymer Electrolytes ◽  
Chloride Concentration ◽  
Xrd Analysis ◽  
Electrolyte System ◽  
Conductivity Enhancement ◽  
Ftir Studies ◽  
Amorphous Nature

The present study aims to investigate the structural and ionic conductivity of carboxymethyl cellulose - ammonium chloride as proton conducting polymer electrolytes. The complexion of polymer electrolyte films has been confirmed via FTIR studies. The conductivity enhancement with the addition of ammonium chloride concentration was proved due to the increase in amorphous nature of the films as evidenced by XRD analysis. Impedance studies indicate that the highest ionic conductivity of 1.43 x 10-3 Scm-1 was observed with the addition of 16 wt.% ammonium chloride in polymer electrolyte system obtained at ambient temperature.

scholarly journals Conductivity and structural studies of PVA based mixed-ion composite polymer electrolytes

2018 ◽  
Vol 7 (2) ◽  
pp. 887 ◽  
Author(s):  
Sandeep Srivastava ◽  
Pradeep K. Varshney
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolytes ◽  
Sodium Perchlorate ◽  
Conductivity Measurement ◽  
Lithium Perchlorate ◽  
Poly Vinyl Alcohol ◽  
Composite Polymer ◽  
Composite Polymer Electrolytes ◽  
Casting Technique ◽  
Solution Casting Technique

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.  

scholarly journals Synthesis of Porous Proton Ion Conducting Solid Polymer Blend Electrolytes Based on PVA: CS Polymers: Structural, Morphological and Electrochemical Properties

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4890 ◽  
Author(s):  
Muaffaq M. Nofal ◽  
Shujahadeen B. Aziz ◽  
Jihad M. Hadi ◽  
Rebar T. Abdulwahid ◽  
Elham M. A. Dannoun ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Polymer Blend ◽  
Salt Content ◽  
Linear Sweep Voltammetry ◽  
Solid Polymer ◽  
Transference Numbers ◽  
Poly Vinyl Alcohol ◽  
Casting Technique ◽  
Peak Broadening ◽  
Ion Conducting

In this study, porous cationic hydrogen (H+) conducting polymer blend electrolytes with an amorphous structure were prepared using a casting technique. Poly(vinyl alcohol) (PVA), chitosan (CS), and NH4SCN were used as raw materials. The peak broadening and drop in intensity of the X-ray diffraction (XRD) pattern of the electrolyte systems established the growth of the amorphous phase. The porous structure is associated with the amorphous nature, which was visualized through the field-emission scanning electron microscope (FESEM) images. The enhancement of DC ionic conductivity with increasing salt content was observed up to 40 wt.% of the added salt. The dielectric and electric modulus results were helpful in understanding the ionic conductivity behavior. The transfer number measurement (TNM) technique was used to determine the ion (tion) and electron (telec) transference numbers. The high electrochemical stability up to 2.25 V was recorded using the linear sweep voltammetry (LSV) technique.

Sign in / Sign up

Export Citation Format

Share Document