Characterization of C2H2O4 doped PVA solid polymer electrolyte

2014 ◽  
Vol 34 (9) ◽  
pp. 859-866
Author(s):  
Karur Alakanandana ◽  
Annadanam Rama Subrahmanyam ◽  
R. Sayanna ◽  
J. Siva Kumar
Keyword(s):  
Oxalic Acid ◽  
Polymer Electrolyte ◽  
Solid Polymer Electrolyte ◽  
Solid Polymer ◽  
Hydroxyl Group ◽  
Spectral Studies ◽  
Poly Vinyl Alcohol ◽  
Scanning Calorimetry ◽  
Dsc Measurements ◽  
Absorption Studies

Abstract A novel solid polymer electrolyte based on poly vinyl alcohol (PVA) with oxalic acid was prepared by the solution caste technique. X-ray diffraction (XRD) and differential scanning calorimetry (DSC) measurements carried out on the samples clearly revealed the modification of the PVA structure; the PVA crystallinity was reduced with increasing oxalic acid content and became more amorphous. The surface morphology of these complexed polymer electrolytes was analyzed by scanning electron microscopy (SEM). Fourier transform infrared spectroscopy (FTIR) spectral studies of the samples suggested that the interaction between H+ ions of oxalic acid and oxygen of the hydroxyl group (OH) of PVA plays a major role in proton conductivity. The optical absorption studies were performed on these samples in a range of wave numbers from 200 nm to 600 nm and the optical band gap values were evaluated. Direct current (DC) conductivity was measured and temperature dependence in the range 27–273°C was studied. It was observed that the conductivity at temperatures beyond the glass transition temperature (Tg) showed a Vogel-Tamman-Fulcher (VTF) type behavior. The electrical conductivity studies on PVA with oxalic acid, in a 70:30 proportion by wt%, demonstrated that the polymer composite is a promising electrolyte for applications in electrochemical cells.

scholarly journals Investigations on the Effect of Chitin Nanofiber in PMMA Based Solid Polymer Electrolyte Systems

2014 ◽  
Vol 17 (3) ◽  
pp. 147-152 ◽  
Author(s):  
P. M. Shyly ◽  
S. Dawn Dharma Roy ◽  
Paitip Thiravetyan ◽  
S. Thanikaikarasan ◽  
P. J. Sebastian ◽  
...  
Keyword(s):  
Polymer Electrolyte ◽  
Solid Polymer Electrolyte ◽  
Ionic Conductivities ◽  
Impedance Analysis ◽  
Phase Changes ◽  
Solid Polymer ◽  
Scanning Calorimetry ◽  
Hydrolysis Method ◽  
Chitin Nanofiber ◽  
Membrane Technique

Polymer electrolyte membranes find application in a variety of fields such as battery systems, fuel cells, sensors and other electrochemical devices. In this paper we have done some investigations on the effect of chitin nanofiber (CNF) in PMMA based solid polymer electrolyte systems. CNF was synthesized from shrimp cell chitin by stepwise purification and acid hydrolysis method. PMMA basedelectrolyte films containing different concentrations of lithium salt and CNFs as filler were prepared by hot-press membrane technique. Crystalline nature and phase changes in polymer electrolytes were confirmed by X-ray diffraction analysis. Thermal behavior of the polymer electrolyte systems was studied by differential scanning calorimetry. Ionic conductivities of the electrolytes have been determined using a.c. impedance analysis in the temperature range between 303 and 393K. The temperature–dependent ionic conductivity

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.

Effects of Natural Clay on Ionic Conductivity, Crystallinity and Thermal Properties of PEO-LiCF3SO3-Natural Clay as Solid Polymer Electrolyte Nanocomposites

2019 ◽  
Vol 803 ◽  
pp. 98-103 ◽  
Author(s):  
Pattranuch Pongsuk ◽  
Jantrawan Pumchusak
Keyword(s):  
Thermal Properties ◽  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Solid Polymer Electrolyte ◽  
Solid Polymer ◽  
Natural Clay ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Halloysite Nanotube ◽  
Electrolyte Membranes

The polymer nanocomposites of PEO-LiCF3SO3 based solid polymer electrolyte were prepared using two kinds of natural clays, which are halloysite nanotube (HNT) and montmorillonite (MMT) nanoparticle. Different contents (0, 1, 5 and 10wt %) of halloysite nanotube (HNT) and montmorillonite (MMT) nanoparticle were explored. Solid polymer electrolyte nanocomposite film was prepared by solution casting method. The ionic conductivity, crystallinity and thermal properties of solid polymer electrolyte membranes were studied by impedance spectroscopy, X-ray diffraction (XRD) and differential scanning calorimetry (DSC), respectively. It was found that HNT provided higher ionic conductivity for solid polymer electrolyte nanocomposite than what MMT did. The highest ionic conductivity at room temperature was found at 5% HNT as 2.068 x 10-5 S.cm-1. The ion-polymer interactions between PEO-LiCF3SO3 and natural clay nanoparticle were investigated by using Fourier transform infrared (FTIR) spectra. The PEO-LiCF3SO3-5%HNT showed good oxidative stability than PEO-LiCF3SO3 composite.

Electrochemical double-layer supercapacitor using poly(methyl methacrylate) solid polymer electrolyte

2020 ◽  
Vol 32 (2) ◽  
pp. 201-207 ◽  
Author(s):  
Ibrahim Zakariya’u ◽  
Burak Gultekin ◽  
Vijay Singh ◽  
Pramod K Singh
Keyword(s):  
Methyl Methacrylate ◽  
Polymer Electrolyte ◽  
Double Layer ◽  
Solid Polymer Electrolyte ◽  
Electrochemical Impedance ◽  
Solid Polymer ◽  
Scanning Calorimetry ◽  
Poly Methyl Methacrylate ◽  
Conductivity Enhancement ◽  
Electrochemical Double Layer

The prime objective of the present article is to develop an efficient supercapacitor based on polymer electrolyte doped with salt. Solution cast technique was adopted to develop a solid polymer electrolyte of polymer poly(methyl methacrylate) (PMMA) as host polymer and salt potassium hydroxide (KOH) as a dopant. Incorporation of salt increases the amorphicity and assisted in conductivity enhancement. Moreover, doping of salt increases the overall conductivity of polymer electrolyte film. Electrochemical impedance spectroscopy reveals the enhancement in conductivity (four orders of magnitude) by salt doping. Fourier transform infrared shows the complexation and composite nature of films. Polarized optical microscopy shows the reduction in crystallinity, which is further confirmed by Differential scanning calorimetry. Fabricated electrochemical double-layer supercapacitor using maximum conducting polymer—salt electrolyte and symmetric carbon nanotubes electrodes shows specific capacitance of 21.86 F g−1.

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