Effect of Plasticizers on Ion Transport Properties of PEO+NH4PF6 Polymer Electrolyte System – Dielectric Studies

2011 ◽  
Vol 110-116 ◽  
pp. 278-284
Author(s):  
Kuldeep Mishra ◽  
D.K. Rai
Keyword(s):  
Ion Transport ◽  
Polymer Electrolyte ◽  
Room Temperature ◽  
Humidity Sensor ◽  
Transference Number ◽  
Electrolyte System ◽  
Free Standing ◽  
Casting Technique ◽  
Ionic Transference Number ◽  
Solution Casting Technique

Dielectric properties of proton conducting polymer electrolyte system, containing polyethylene oxide (PEO) as host polymer and ammonium hexfluorophosphate (NH4PF6) as complexing salt plasticized with EC and EC:PC, are investigated. The free standing films of thickness ~ 200 - 300µm are synthesized by solution casting technique. The electrical conductivity studies show that plasticization of the polymer electrolyte results into an enhancement in its conductivity by about two orders of magnitude. The maximum room temperature bulk conductivity is obtained to be ~ 10-5 S/cm for the plasticized polymer electrolyte. To understand the ion transport mechanism, different frequency dependent parameters are measured like dielectric permittivity, loss tangent and AC conductivity. The ionic transference number of the prepared systems is found to be close to unity which shows ion dominant charge transport in the electrolyte system. The conductivity of the polymer electrolyte has been found to be very sensitive to the relative humidity, which makes it a good candidate for its application for humidity sensor.

Ionic Conductivity, Morphology and Transport Number of Lithium Ions in PMMA Based Gel Polymer Electrolytes

2013 ◽  
Vol 334-335 ◽  
pp. 137-142 ◽  
Author(s):  
Lisani Othman ◽  
Khairul Bahiyah Md. Isa ◽  
Zurina Osman ◽  
Rosiyah Yahya
Keyword(s):  
Ionic Conductivity ◽  
Salt Concentration ◽  
Polymer Electrolytes ◽  
Ethylene Carbonate ◽  
Transference Number ◽  
Gel Polymer Electrolytes ◽  
Casting Technique ◽  
Ionic Transference Number ◽  
Temperature Dependence Of Conductivity ◽  
Solution Casting Technique

The gel polymer electrolytes (GPEs) composed of polymethylmethacrylate (PMMA) with lithium trifluoromethanesulfonate (LiCF3SO3) salt dissolved in a binary mixture of ethylene carbonate (EC) and propylene carbonate (PC) organic solvents have been prepared by the solution casting technique. The samples are prepared by varying the salt concentrations from 5 wt.% to 30 wt.%. Impedance spectroscopy measurement has been carried out to determine the ionic conductivity of the samples. The sample containing 25 wt.% of LiCF3SO3salt exhibits the highest room temperature ionic conductivity of 2.56 x 10-3S cm-1. The conductivity of the GPEs has been found to depend on the salt concentration added to the sample, while at higher salt concentration reveals a decrease in the ionic conductivity due to ions association. The temperature dependence of conductivity from 303 K to 373 K is found to obey the Arrhenius law. The ionic transference number,tiof GPEs has been estimated by the DC polarization method and the value is found to be 0.98, 0.93, and 0.97 for the sample containing 25 wt.%, 5 wt.% and 30 wt.% respectively. This result is consistent with the conductivity studies.

AC-Impedance, Dynamic mechanical analysis and DSC investigations on poly(methyl methacrylate)–LiTf polymer electrolyte systems

2017 ◽  
Vol 13 (1) ◽  
pp. 4618-4627
Author(s):  
Abdulhamid Mohammed Soliman ◽  
Ezeldain El. Shafee
Keyword(s):  
Ionic Conductivity ◽  
Ethylene Carbonate ◽  
Transference Number ◽  
Ac Impedance ◽  
Mechanical Analysis ◽  
Ionic Conductors ◽  
Casting Technique ◽  
Ionic Transference Number ◽  
The Matrix ◽  
Solution Casting Technique

Gel polymer electrolytes synthesized from Poly(methylmethacrylate) (PMMA) as the host, ethylene carbonate (EC)/propylene carbonate (PC) as plasticizer and LiCF3SO3 (LiTf) as a salt has been prepared using solution casting technique. X-ray characterization confirms the complete dissociation of the LiTf salt in the gel polymer. The effect of LiTf  salt on ionic conductivity, ionic transference number (tion) and  mechanical characteristics were investigated. The ac impedance has been studied to evaluate the ionic conductivity. It was observed that the ionic conductivity of the prepared gel reached the highest value of  6.60 x 10-5 S/cm at 10.2 wt.% (1M) of LiTf salt. The temperature dependence studies showed that the samples were ionic conductors and seemed to obey the Vogel–Tamman–Fulcher (VTF) rule.  Dynamic mechanical  analysis (DMA) indicates that  the LiTf salt induces a remarkable increase in the storage modulus of the matrix at temperatures above the glass transition (rubbery plateau region).

Investigation of Electrical Properties, Structure and Morphological Characterization of Mg+2 Ions Conducting Solid Polymer Electrolyte Based on Poly(vinyl alcohol)

2017 ◽  
Vol 6 (1) ◽  
pp. 102-107 ◽  
Author(s):  
Reda Khalil ◽  
Eslam Mohamed Sheha ◽  
Alaa Eid
Keyword(s):  
Polymer Electrolyte ◽  
Vinyl Alcohol ◽  
Solid Polymer Electrolyte ◽  
Transference Number ◽  
Morphological Characterization ◽  
Solid Polymer ◽  
Poly Vinyl Alcohol ◽  
Casting Technique ◽  
Ionic Transference Number ◽  
Electrolyte Component

In the present work, solid polymer electrolyte using poly(vinyl alcohol) (PVA) and magnesium perchlorate (Mg(ClO4)2) in different compositions has been prepared by the solution-casting technique method. Surface feature of films was characterized by scanning electron microscopy (SEM) measurement. X-ray diffraction (XRD) was used to determine the complexation of the polymer with the salt. The electrophysical characteristics were measured and analyzed as dependent on the concentration, nature of the solid polymer electrolyte component and ambient temperature. A maximum ionic conductivity value of ∼10–4 S/cm at 303 K is obtained for PVA0.6/(Mg(ClO4)2)0.4 composite. The ionic transference number of Mg+2 mobile ions has been estimated by a dc polarization method. The result reveals that the conducting species are predominantly ions.

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.

scholarly journals Conductivity Studies of Epoxidized PMMA Grafted Natural Rubber Doped Lithium Triflate Gel Polymer Electrolytes

2019 ◽  
Vol 7 (4.14) ◽  
pp. 502
Author(s):  
Khuzaimah Nazir ◽  
Mohamad Fariz Mohamad Taib ◽  
Rosnah Zakaria ◽  
Muhamad Kamil Yaakob ◽  
Oskar Hasdinor Hassan ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Polymer Electrolytes ◽  
Ethylene Carbonate ◽  
Transference Number ◽  
Gel Polymer Electrolytes ◽  
Lithium Triflate ◽  
Casting Technique ◽  
Ionic Transference Number ◽  
Conductor Surface ◽  
Solution Casting Technique

A gel polymer electrolytes (GPEs) comprising of 62.3 mol% of epoxidized-30% poly(methyl methacrylate) grafted natural rubber (EMG30) as a polymer host, LiCF3SO3 as a dopant salt and ethylene carbonate (EC) as a plasticizer was prepared by solution-casting technique. The effect of plasticizer on the EMG30- LiCF3SO3 on the ionic conductivity is explained in terms of the plasticizer loading of the film. The temperature dependence of the conductivity of the polymer films obeys the Vogel-Tamman-Fulcher (VTF) relationship. The ionic transference number is calculated using Wagner’s polarization technique shows that the conducting species are predominantly due ions and hence showed the system is an ionic conductor. Surface morphological analysis showed the sample with the highest conductivity exhibited most homogenous in nature.  

scholarly journals Electrical, electrochemical and structural studies of a chlorine-derived ionic liquid-based polymer gel electrolyte

2021 ◽  
Vol 12 ◽  
pp. 1252-1261
Author(s):  
Ashish Gupta ◽  
Amrita Jain ◽  
Manju Kumari ◽  
Santosh K Tripathi
Keyword(s):  
Ionic Liquid ◽  
Vinylidene Fluoride ◽  
Transference Number ◽  
Gel Electrolyte ◽  
Polymer Gel ◽  
Polymer Gel Electrolyte ◽  
Free Standing ◽  
Casting Technique ◽  
Ionic Transference Number ◽  
Poly Vinylidene Fluoride

In the present article, an ionic liquid-based polymer gel electrolyte was synthesized by using poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP) as a host polymer. The electrolyte films were synthesized by using the solution casting technique. The as-prepared films were free-standing and transparent with good dimensional stability. Optimized electrolyte films exhibit a maximum room-temperature ionic conductivity of σ = 8.9 × 10−3 S·cm−1. The temperature dependence of the prepared polymer gel electrolytes follows the thermally activated behavior of the Vogel–Tammann–Fulcher equation. The total ionic transference number was ≈0.91 with a wider electrochemical potential window of 4.0 V for the prepared electrolyte film which contains 30 wt % of the ionic liquid. The optimized films have good potential to be used as electrolyte materials for energy storage applications.

Anions Effect on the Electrical Properties of PMMA/ENR 50 Blend Electrolytes

2015 ◽  
Vol 1107 ◽  
pp. 145-150 ◽  
Author(s):  
Famiza Latif ◽  
Sharil Fadli Mohamad Zamri ◽  
Madzlan Aziz
Keyword(s):  
Ionic Conductivity ◽  
Electrical Properties ◽  
Natural Rubber ◽  
Methyl Methacrylate ◽  
Polymer Electrolyte ◽  
Room Temperature ◽  
Lattice Energy ◽  
Solvent Casting ◽  
Electrolyte System ◽  
Casting Technique

<h1>The lattice energy of the doping salt for a polymer electrolyte is crucial because it affects the ionic conductivity of the polymer electrolyte system. It is also known that the lattice energy of a salt depends on the size of the anion. The larger the anion the lower the lattice energy of the salt. Therefore, in this study the effect of the anion size of various doping salts; LiNO3 and LiN(CF3SO2)2 with lattice energy of 848 kJ/mol and 489.4 kJ/mol, respectively were investigated and compared with LiCF3SO3 salt (735 kJ/mol) on the electrical properties of poly (methyl methacrylate) (PMMA) / epoxidised natural rubber (ENR 50) blend film. All the doped PMMA/ENR 50 films were prepared by solvent casting technique. Surprisingly, though LiN(CF3SO2)2 exhibited the lowest lattice energy, it displayed the lowest ionic conductivity value of 10-8 S/cm at room temperature as compared to LiNO3 and LiBF4 due to its poor coordinating power with the polymer. This was confirmed from the FTIR analyses. Further investigation on the dielectric behaviour of the doped PMMA/ENR 50 films were also reported.</h1> <p></p>

Effect of 1-Ethyl-3-Methylimidazolium Nitrate on the Electrical Properties of Starch/Chitosan Blend Polymer Electrolyte

2016 ◽  
Vol 846 ◽  
pp. 510-516 ◽  
Author(s):  
Azwani Sofia Ahmad Khiar ◽  
M.R.S. Anuar ◽  
M.A. Md Parid
Keyword(s):  
Polymer Electrolyte ◽  
Solid Polymer Electrolyte ◽  
Room Temperature ◽  
Liquid Electrolyte ◽  
Solid Polymer ◽  
Casting Technique ◽  
Wide Range ◽  
Solution Casting Technique ◽  
Blend Polymer Electrolyte ◽  
Blend Polymer

Solid polymer electrolyte (SPE) can be viewed as an alternative of conventional liquid electrolyte since it is easier to handle. Previous Solid polymer electrolyte (SPE) can be viewed as an alternative of conventional liquid electrolyte since it is easier to handle. In the present work, starch/chitosan-ammonium nitrate (NH4NO3) SPE has been prepared by solution casting technique. Different amount of 1-ethyl-3-methylimidazolium nitrate ([EMIM][NO3]) was added to the sample. Ionic conductivity analysis was conducted over a wide range of frequency between 50 Hz-1 MHz using impedance spectroscopy to evaluate the dielectric properties and conductivity of the sample.Sample with 15 wt% of [EMIM][NO3] has shown the highest conductivity of 7.36 x 10-5 S cm-1 at room temperature. Complex permittivity for real (εr), imaginary (εi) and electrical modulus for real (Mr) and imaginary (Mi) part was determined and plotted.

Properties of Gel Polymer Electrolyte Based Poly(Vinylidine Fluoride-сo-Hexafluoropropylene) (PVdF-HFP), Lithium Perchlorate (LiClO4) and 1-Butyl-3-Methylimmidazoliumhexafluorophosphate [PF6]

2021 ◽  
Vol 317 ◽  
pp. 434-439
Author(s):  
Siti Aminah Mohd Noor ◽  
Chow Peng Wong ◽  
Mariah Zuliana Dzulkipli ◽  
Mohd Sukor Su'ait ◽  
Lee Tian Khoon ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Room Temperature ◽  
Morphological Analysis ◽  
Gel Polymer Electrolyte ◽  
Lithium Perchlorate ◽  
Casting Technique ◽  
Solution Casting Technique ◽  
Imidazolium Ion

This study reported the preparation and characterization of gel polymer electrolyte (GPE) using poly (vinylidine fluoride-co-hexafluoropropylene) (PVdF-HFP), lithium perchlorate (LiClO4) and 1-butyl-3-metilimmidazoliumhexafluorophosphate [PF6]. The GPE were prepared by solution casting technique. [Bmim] [PF6] ionic liquid is used as an additive for the purpose of increasing the ionic conductivity of GPE. Morphological analysis showed that the electrolyte gel polymer sample had a smooth and flat surface with the addition of [Bmim] [PF6] and no phase separation effect was observed. This shows the compatibility between PVdF-HFP and [Bmim] [PF6]. ATR-FTIR analysis showed that C-F bond related peaks experienced peak changes in terms of intensity and peak shifting. This proves the interaction of the imidazolium ion with the fluorine atom through the formation of coordinate bonds. Ionic conductivity analysis showed that PVdF-HFP-[Bmim][PF6] samples reached a maximum room temperature ionic conductivity value of 2.44 × 10-4 S cm-1 at 60 wt.% [Bmim] [PF6]. When 20 wt.% of LiClO4 added to the system, the ionic conductivity increased one magnitude order to 2.20 × 10-3 S cm-1.

scholarly journals Preparation and characterization of PEO-based composite gel-polymer electrolytes complexed with lithium trifluoro methane sulfonate

2018 ◽  
Vol 36 (2) ◽  
pp. 185-192 ◽  
Author(s):  
A.J. Nagajothi ◽  
R. Kannan ◽  
S. Rajashabala
Keyword(s):  
Polymer Electrolyte ◽  
Gel Polymer Electrolyte ◽  
Linear Sweep Voltammetry ◽  
Transference Number ◽  
Tetraethylene Glycol ◽  
Interfacial Resistance ◽  
Casting Technique ◽  
Composite Gel ◽  
Solution Casting Technique ◽  
Ft Ir

Abstract Chitosan has been successfully incorporated as a filler in a polyethylene oxide (PEO) and lithium trifluoromethanesulfonate (LiCF3SO3) matrix with a combination of plasticizers, namely 1,3-dioxolane (DIOX) and tetraethylene glycol dimethylether (TEGDME). The composite gel-polymer electrolyte (CGPE) membranes were prepared by solution casting technique in an argon atmosphere. The prepared membranes were subjected to SEM, TG/DTA and FT-IR analyses. A Li/CGPE/Li symmetric cell was assembled and the variation of interfacial resistance was measured as a function of time. The lithium transference number (Li+t) was measured and the value was calculated as 0.6 which is sufficient for battery applications. The electrochemical stability window of the sample was studied by linear sweep voltammetry and the polymer electrolyte was found to be stable up to 5.2 V.

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