Transport and Morphological Properties of Gel Polymer Electrolytes Containing Mg(CF₃SO₃)₂

Abstract

Magnesium-ion conducting gel polymer electrolytes (GPEs) based on PMMA with ethylene carbonate (EC) and propylene carbonate (PC) as a plasticizing solvent were prepared via the solution casting technique. Mg(CF3SO3)2 salt was used as source of magnesium ions, Mg2+. The variation of conductivity with salt concentrations, from 5 wt.% to 30 wt.% was studied. The gel polymer electrolyte with composition 20 wt.% of Mg(CF3SO3)2 exhibited the highest conductivity of 1.27 x 10-3 S cm-1 at room temperature. The conductivity-temperature dependence of gel polymer electrolyte films obeys Arrhenius behaviour with activation energy in the range of 0.18 eV to 0.26 eV. Ionic transport number was evaluated using DC polarization technique and it reveals the conducting species are predominantly ions. It is found that the ionic conductivity and transport properties of the prepared GPEs are consistent with the X-Ray Diffraction (XRD) and Field Emission Scanning Electron Microscopy (FESEM) studies.

Bio-Based Plasticized PVA Based Polymer Blend Electrolytes for Energy Storage EDLC Devices: Ion Transport Parameters and Electrochemical Properties

“…The usage of solid polymer electrolyte (SPE) in these applications has also been acknowledged by few researchers because of their ability to provide good mechanical stability and good electrolyte/electrode contact [6]. SPEs also have much less tendency to harm the internal components of the devices because they circumvent leaking and corrosive problems that are possessed by liquid electrolyte [7][8][9]. Verma et al [10] prepared nano-composite PE of 95(70PEO-30AgI)-5SiO 2 with the conductivity value of 2.5 × 10 −3 S/cm.…”

Synthesis and Structural Characterization Studies on Solid Polymer Electrolyte System with Magnesium Triflate as Host Salt, EC as Plasticizer and MgO as Nanofiller

“…Magnesium electrochemistry at or near ambient temperature is rather undertaken by few researchers and a substantial research effort will be required in order to explore their possible use in electrochemical devices. The significant attention towards magnesium ion conducting polymer electrolyte system is due to important characteristics of the magnesium metal such as high charge density, considerably negative electrode potential, and high melting point (922 K), low cost, ease of handling, disposal and low toxicity [7][8][9] . The trifluoromethanesulfonate (triflate) ion, CF 3 SO 3 -, has proved to be an extremely important probe of ionic association in polymer salt complexes.…”

The Study of Electrical and Electrochemical Properties of Magnesium Ion Conducting CS: PVA Based Polymer Blend Electrolytes: Role of Lattice Energy of Magnesium Salts on EDLC Performance

“…Over decades, it has become one of the main components in electrochemical devices, such as proton batteries and electrochemical double-layer capacitor (EDLC). These liquid electrolytes show a good performance in a few energy devices, but they evaporate easily and also have detrimental impact on internal components of the devices, for instance corrosion and leaking problems [ 2 , 3 , 4 ]. Based on these considerations, researchers have found that SPEs are a better candidate to be an alternative to the liquid electrolytes.…”

“…For example; lithium-based salts show an overall good performance with non-biodegradability which has a detrimental impact on the environment [ 19 ]. Nowadays, the H + , Mg 2+ , and NH 4 + ions are considered as the alternatives for Li + ion in SPEs [ 2 , 20 ]. For example, the blend of PEO/EmimBF 4 has shown an increase in ionic conductivity with the addition of magnesium triflate (Mg(CF 3 SO 3 ) 2 ) salt up to 9.4 × 10 −5 S cm −1 at room temperature [ 21 ].…”