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Plasticized polymer blend electrolytes were prepared by incorporating poly (vinylidenefluoride-co-hexafluoropropylene)(PVdF-HFP) and poly(ethylmethacrylate) (PEMA) complexed with plasticizer (PC) and different lithium salts such as LiClO4, LiBF4, LiCF3SO3 and LiN (CF3SO2)2) using solution-casting technique. X-ray diffraction and Fourier transform infra-red techniques confirms the structural characters and complex formation of the polymer electrolytes respectively. AC impedance analysis was carried out for all the samples in the range303-373K. The results suggest that among the various lithium salts, LiN (CF3SO2)2) based electrolytes exhibited the highest ionic conductivity (3.17 × 10-3 Scm-1). © Published under licence by IOP Publishing Ltd.

VIT Unitversity

Department of Physics

School of Advanced Sciences

Vellore Campus

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IOP Conference Series: Materials Science and Engineering

Investigations on PVdF- HFP - PEMA polymer blend electrolytes doped with different lithium salts

Plasticized polymer electrolytes comprising of ethylene carbonate as the plasticizing agent in poly (vinyl chloride) [PVC]–poly (butyl methacrylate) [PBMA] blended polymer electrolytes were prepared by solution casting technique. Complex formation, structural elucidation, conductivity, dielectric parameters (Ɛ′, Ɛ″, M′, and M″), thermal stability, and surface morphology are brought out from FTIR, XRD, ac impedance analysis, dielectric studies, thermogravimetry/differential thermal analysis, and scanning electron microscopic studies, respectively. Polymer electrolytes are found to exhibit higher ionic conductivity at higher concentration of plasticizer at the cost of their mechanical stability. Conductivity of 1.879 × 10−4 S cm−1 is exhibited by the polymer electrolyte consisting of 69% of plasticizer with appreciable thermal stability up to 523 K. Temperature and frequency dependence of conductivity is found to follow Vogel Tammann Fulcher relation and Jonscher power law, respectively. Real and imaginary parts of dielectric constants are found to decrease with increase in frequency which could be due to the electrode polarization effect. © 2017, Springer-Verlag Berlin Heidelberg.

Ionics

Influence of plasticizer on ionic conductivity of PVC-PBMA polymer electrolytes

Composite polymer electrolytes were prepared by incorporating inorganic filler TiO2 into PVdF-HFP-PMMA-EC-LiClO4 system. The electrolyte films were prepared by solvent casting technique. The effect of inorganic filler on the conductivity of the blended polymer electrolyte was studied and it is found that there is a considerable increase in ionic conductivity 1.296 × 10-3 S/cm-1 on the addition of TiO2. X-ray diffraction (XRD) study elucidate the increase in amorphous nature of the polymer electrolyte. This tendency of the polymer electrolyte could be the reason behind the increase in ionic conductivity. Fourier transform infrared spectroscopy (FTIR) spectra show the occurrence of complexation and interaction among the components. © Published under licence by IOP Publishing Ltd.

TiO2 as conductivity enhancer in PVdF-HFP polymer electrolyte system

Poly(vinyl chloride) (PVC)—poly(butyl methacrylate) (PBMA) blended polymer electrolytes with lithium perchlorate (LiClO4) as the complexing salts are prepared by solution casting technique. The addition of PBMA into PVC matrix is found to induce considerable changes in physical and electrical properties of the polymer electrolytes. Addition of PBMA into PVC matrix is found to increase the conductivity by two orders of magnitude (1.108 × 10−5 S cm−1) when compared with that of the pristine PVC polymer electrolyte (10−7 S cm−1). Structural, thermal, mechanical, morphological, and polymer–salt interactions are ascertained from X-ray diffraction (XRD), thermogravimetry/differential thermal analysis (TG/DTA), mechanical analysis, scanning electron microscope (SEM), and Fourier transform infrared spectroscopy (FTIR) respectively. A thermal stability upto 250 °C is asserted from the TG/DTA analysis. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44939. © 2017 Wiley Periodicals, Inc.

Journal of Applied Polymer Science

Effect of PBMA on PVC-based polymer blend electrolytes

Composite polymer electrolytes comprising of polyvinyl chloride (PVC), poly(butyl methacrylate) (PBMA), lithium perchlorate (LiClO4), ethylene carbonate (EC) and with different ratios of aluminium oxide (Al2O3) are prepared by solution casting technique and characterized. Structural and complex formations are confirmed from XRD and FTIR studies. Conductivity studies were carried out and found that as the Al2O3 concentration increases the conductivity is found to increase initially and then decrease after certain concentration. The room temperature ionic conductivity of polymer electrolyte film bereft of Al2O3 is found to be 0.116 mS cm−1 which increases to 0.712 mS cm−1 in electrolyte membranes with 10 wt% of Al2O3. Dielectric behaviour (ε′ and ε″) for the composite polymer electrolytes was found to decreases with increase in frequency due to existence of electrode polarization effect. The high dielectric constant and low dielectric modulus are observed for 10 wt% of Al2O3 incorporated PVC–PBMA composite polymer electrolyte compared to other Al2O3 concentrations. The morphology of polymer electrolyte membranes were studied by scanning electron microscope. © 2016, Springer Science+Business Media New York.

Journal of Materials Science: Materials in Electronics

Investigation on Al2O3 doped PVC–PBMA blend polymer electrolytes

Polyvinyl chloride (PVC)-Poly (butyl methacrylate) (PBMA) composite polymer electrolytes with incorporation of different ratio of ZrO2 doped was prepared by solution casting technique. The ionic conductivity, dielectric behavior, ionic transference number and surface morphology of the composite polymer electrolytes were characterized by using ac impedance, dielectric, DC polarization method and SEM studies respectively. The best room temperature ionic conductivity (0.520mScm-1 at 303 K), high dielectric constant (27340 ± 10 at 50 Hz) and high pore size obtained for 10 wt% of ZrO2 doped composite polymer electrolytes. DC polarization method confirms the occurrences of conduction in composite PVC-PBMA blend polymer electrolytes predominantly due to ions. © 2017 Author(s).

AIP Conference Proceedings

PVC-PBMA nanocomposite polymer electrolytes for lithium battery applications

Plasticized polymer electrolyte comprising poly (vinylidene fluoride-co-hexa fluoro propylene), poly (methyl methacrylate), and Lithium per chlorate as the complexing salt with different concentrations of Propylene carbonate has been prepared exhibiting an ionic conductivity of the order of 10-3 S cm-1. Temperature dependent ionic conductivity seems to obey Vogel Tamman Fulcher relation, and the transport mechanism has been discussed on the basis of free volume theory. The structural elucidations have been ascertained from X-ray diffraction and Fourier transform infrared spectroscopy. Thermal stability of the electrolyte has been asserted based on results from Differential Scanning Calorimetry.

International Journal of ChemTech Research

Conductivity study on PVDF-HFP/PMMA electrolytes for lithium battery applications

Solid polymer electrolyte membrane comprising poly(vinyl chloride) (PVC), poly(ehylene oxide) (PEO) and different lithium salts (LiClO4, LiBF4 and LiCF3SO3) were prepared by the solution casting technique. The effect of complexing salt on the ionic conductivity of the PVC/PEO host polymer is discussed. Solid polymer electrolyte films were characterized by X-ray diffraction, FTIR spectroscopy, TG/DTA and ac impedance spectroscopic studies. The conductivity studies of these solid polymer electrolyte (SPE) films are carried out as a function of frequency at various temperatures ranging from 302 K to 353 K. The maximum room temperature ionic conductivity is found to be 0·079 × 10-4 S cm -1 for the film containing LiBF4 as the complexing salt. The temperature dependence of the conductivity of polymer electrolyte films seems to obey the Vogel-Tamman-Fulcher (VTF) relation. © Indian Academy of Sciences.

Department of Mathematics

Bulletin of Materials Science

Effect of complexing salt on conductivity of PVC/PEO polymer blend electrolytes

Poly(vinyl chloride)/poly(ethyl methacrylate)-based polymer blend electrolytes comprising propylene carbonate as a plasticizer and a lithium salt LiX (X = BF4-, ClO4-, CF3SO3-) are prepared by a solvent casting technique. The electrolytes are subjected to characterization by ionic conductivity, X-ray diffraction, Fourier transform infrared spectroscopy and thermogravimetic/differential thermal analysis. The electrolytes that contain LiBF4 exhibit maximum conductivity and are thermally stable up to 254 °C. © 2008 Elsevier B.V. All rights reserved.

Journal of Power Sources

Ionic conduction in poly(vinyl chloride)/poly(ethyl methacrylate)-based polymer blend electrolytes complexed with different lithium salts

Polyvinyl chloride)/Poly(ethyl methacrylate) (PVC)/(PEMA)-based blend polymer electrolytes comprising a combination of PC (Propylene carbonate) as a plasticizer and LiClO4 as a salt have been prepared by solvent casting technique with varying salt concentration ratios systematically. The prepared electrolytes were subjected to X-ray diffraction, Fourier transform infrared spectroscopy, conductivity studies, thermogravimetric/differential thermal analysis and Scanning electron microscopic studies. PVC/PEMA polymer blend electrolyte with 8 wt % of lithium, salt exhibited ionic conductivity of the order of 10-3 S/cm at room, temperature. © 2008 Wiley Periodicals, Inc.

Li ion conduction behavior of hybrid polymer electrolytes based on PEMA

Polymer electrolyte membranes comprising of poly (ethyl methacrylate)/ poly (vinyl chloride), propylene carbonate (PC) as plasticizer and LiClO4 as salt were prepared by solvent casting technique. XRD, FTIR and SEM studies have been made to investigate the structural, complexation and variation in film morphology of the polymer electrolyte. The maximum ionic conductivity value 3.454x10-3 S/cm has been observed for PVC (5)-PEMA (20)-PC (67) - LiClO4 (8 wt %) system at 303K using ac impedance spectroscopic technique. Also, the TG/DTA studies showed the thermal stability of the film ©2008 by ESG.