Structural, thermal and electrical properties of plasticised PVA based polymer electrolyte

Abstract

Polymer electrolyte films of polyvinyl alcohol as host polymer, poly(3,4-etylenedioxythiophene)/poly(styrenesulphonate), magnesium bromide were prepared using solution cast technique. Succinonitrile was used as plasticiser in the matrix at different concentrations. These films were characterised using thermogravimetric analysis, X-ray diffraction and ac impedance spectroscopy. The conductivity measurement was used to determine the ionic conductivity of the polymer electrolyte at different temperature and frequency values, giving some insight into its potential utility as a solid membrane in solid state batteries. The ionic transference number of mobile ions has been estimated by a dc polarisation method, and the results reveal that the conducting species are predominately ions. A solid state magnesium battery was fabricated and characterised.

Role of Ion Dissociation on DC Conductivity and Silver Nanoparticle Formation in PVA:AgNt Based Polymer Electrolytes: Deep Insights to Ion Transport Mechanism

“…The maximum DC conductivity measured for the current study is found to be 4.5 × 10 −6 S/cm and greater than those reported for PVA:Mg(NO 3 ) 2 and PVA:KCl, which are 7.36 × 10 −7 S/cm and 9.68 × 10 −7 S/cm, respectively [ 1 , 15 ]. However, it is very close to the obtained value reported by Sheha et al [ 14 ], in which the highest conductivity was 9.8 × 10 −6 S/cm for PVA, PEDOT:PSS-MgBr 2 system.…”

“…However, the main drawbacks of using PEO in the preparation of polymer electrolytes are its strong affinity to crystallize and its low ionic conductivity [3]. The literature reviews revealed that most researchers focused on other types of polymers, such as chitosan [4,5,6,7,8,9], methyl cellulose [10,11,12,13,14] and poly(vinyl alcohol) [1,2,3,14,15,16]. Polyvinyl alcohol (PVA) polymer is widely used in electrochemical and electrochromic devices due to its bio-compatibility and superior mechanical properties.…”

“…PVA has excellent and easy thin-film formation capability, sufficient hydrophilic properties, and a high density of reactive chemical functions that are ideal for cross-linking by chemical and thermal treatments [ 17 ]. In addition, PVA possesses a carbon chain backbone structure with hydroxyl (OH) groups connected to methane carbons, which can be a source of hydrogen bonding and thus assist polymer electrolyte (PE) formation [ 14 ]. Polymer electrolyte membranes containing silver ions dissolved in a polymeric solvent have paid considerable attention due to their excellent solid state separation performance [ 18 ].…”

Review—Polymer Electrolytes for Magnesium Batteries: Forging Away from Analogs of Lithium Polymer Electrolytes and Towards the Rechargeable Magnesium Metal Polymer Battery

“…Sheha and colleagues also demonstrated a GPE complex with moderate ionic conductivity above 10 −4 S cm −1 using PVA/poly (3,4-etylenedioxythiophene): poly(styrenesulphonate) (PEDOT:PSS)-based GPE with MgBr 2 and SN as a plasticizer. 139 Mg ion conduction was observed from the transference number of 0.28 and stable, low capacity charge/ discharge cycling of a Mg|V 2 O 5 cell over 40 cycles. The electrodes were not fully utilized with SEM-EDS showing minimal change in Mg content (0.93 → 2.55 wt%) in the cathode after discharge.…”

Synthesis and characterization of polyvinylidene fluoride/magnesium bromide polymer electrolyte for magnesium battery application

“…A polymer electrolyte based on poly (vinyl alcohol) (PVA) and poly(3,4-Etylenedioxythiophene):poly(styrenesulfonate) (PEDOT: PSS) complexed with magnesium bromide (MgBr 2 ) was synthesized and the maximum conductivity of 9.89×10 −6 S cm −1 was found for the optimum polymer composite film with 30 wt% MgBr 2 at room temperature [7]. The work was extended to optimize the ionic conductivity via doping the optimized polymer electrolyte by succinonitrile (SN) and the ionic conductivity increased from 9.8×10 −6 to 2.83×10 −4 S cm −1 for 20 wt% SN [9]. The highest recorded ionic conductivity of the PE film based 70 wt% PVA, 30 wt% MgBr 2 and 1 wt% TEGDME was 1.3×10 −6 S.cm −1 [10].…”