Novel Li-ion conduction on poly(vinyl acetate)-based hybrid polymer electrolytes with double plasticizers

Abstract

Polymer blend electrolytes comprising of poly (vinyl acetate), poly(vinylidene fluoride-co-hexafluoropropylene), LiClO 4 , and EC-based plasticizer combinations (EC ? PC, EC ? GBL, EC ? DMP, EC ? DBP, EC ? DEC) are prepared by solvent casting technique. Ionic conductivities of the electrolytes are determined by ac impedance studies in the temperature range 303-363 K. Among the various combinations of plasticizers, EC ? PC added complex exhibits maximum ionic conductivity of the order of 10 -4 S cm -1 and the temperature-dependent ionic conductivity plots seem to obey the VTF relation. The structural and complex formations of the prepared samples have been confirmed by X-ray diffraction analysis. DSC technique is used to study the thermal behaviour. The surface images of the sample having maximum ionic conductivity are analyzed with the help of SEM and AFM techniques.

Electrochemical analysis on poly(ethyl methacrylate)-based electrolyte membranes

“…Similar studies were carried out by Ulaganathan and Rajendran. 22 The variation in the conductivity is mainly due to the specific properties of the plasticizers such as viscosity as well as dielectric nature. It is a well-accepted fact that the conductivity is fully controlled by the viscosity of the medium, likewise higher dielectric nature would enhance more charge carrier dissolutions.…”

Advances in Natural Biopolymer‐Based Electrolytes and Separators for Battery Applications

“…While polyether, [ 17 ] polysulfone, [ 18 ] polysiloxane, [ 19 ] and polyborate, [ 20 ] based homopolymers and copolymers have been explored as matrix for SPEs and backbone for single‐metal ion conductors (defined by an unity metal ion transference number), polyethylene oxide (PEO), [ 21 ] poly(methyl methacrylate) (PMMA), [ 22 ] polyacrylonitrile (PAN), [ 23 ] polyvinyl acetate (PVAc), [ 24 ] and polyvinylidene fluoride (PVDF), [ 25 ] have been the focus of GPE development. Most of these synthetic polymers are either fossil fuel derived, [ 26 ] or non‐biodegradable.…”

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

“…Polymer electrolytes are supposed to have a comparative ionic conductivity to that of liquid electrolytes. As the polymer electrolytes exhibit an ionic conductivity of the order of 10 −4 S cm −1 , at room temperature, various approaches such as the preparation of solid polymer electrolytes (polymer blend [6][7][8] and copolymer [9]), gel polymer electrolyte (plasticizer [8,10], ionic liquids [11,12], and coupling agent [13]) and composite polymer electrolyte (inorganic filler [14] and clay [15]) have been reported.…”

“…Gel polymer electrolytes overcome the drawbacks such as leakage, evaporation arising in liquid electrolytes, and the poor ionic conductivity of solid polymer electrolytes thus making gel polymer electrolytes prominent than its contemporaries [20,21]. Further, gel polymer electrolytes have wide electrochemical window, good compatibility with electrodes, and high ionic conductivity but the disadvantage of gel polymer electrolytes is its poor mechanical stability [6][7][8]22]. For example, the ionic conductivity of solid polymer electrolytes [polyethylene oxide (PEO)-lithium bis (trifluoromethanesulfonyl) imide (LiTFSI)] is reported to be 4.0 × 10 −6 S cm −1 at 25°C which is very low for electrochemical device applications.…”

“…PVC have been chosen due to its high mechanical stability, due to dipole-dipole interaction between hydrogen and chlorine atom and the presence of lone pair electrons at the chlorine atom which aid in solvation of lithium salt [32]. Further, PVC serves as a mechanical stiffener in blended polymer electrolytes due to its immiscibility with a wide range of plasticizers [6][7][8]. Poly (butyl methacrylate) was chosen as the complexing polymer for preparation of polymer blend.…”