Effect of plasticizer on electrical conductivity and cell parameters of (PVC+KBrO3) polymer electrolyte system

Abstract

The effect of a plasticizer dimethyl formamide (DMF) on the properties of a potassium ion conducting electrolyte based on polyvinyl chloride (PVC) complexed with potassium bromate (KBrO 3 ) prepared using solutioncast technique was investigated. Various experimental techniques, such as electrical conductivity (composition and temperature dependence) and transport number measurements, were used to characterize these polymer electrolyte films. It was found that the addition of plasticizer (DMF) significantly improved the ionic conductivity. Transport number for K + ion ranged from 0.95 to 0.97 depending on the composition and temperature. Electrochemical cells of configuration K/PVC+KBrO 3 /(I 2 +C+electrolyte) and K/PVC+KBrO 3 +plasticizer/(I 2 +C+electrolyte) were fabricated. The discharge characteristics of the cells were studied under a constant load of 100 kΩ. The open-circuit voltage, short-circuit current, and discharge time for the plateau region were measured. The PVC+KBrO 3 polymer electrolyte system with added plasticizer showed an increased discharge time with respect to pure PVC+KBrO 3 electrolyte system. The features of complexation of the electrolytes were studied by X-ray diffraction.

Effect of plasticizer on ionic transport and dielectric properties of PVA–H3PO4 proton conducting polymeric electrolytes

“…This can be attributed to the ability of the plasticizer to penetrate the polymer matrix establishing an attractive force due to which cohesive forces between the polymer chains are reduced. This facilitates an enhancement in the segmental motions of PVA chains by lowering the T g and hence increases the ionic conductivity [23]. The results shown in the present work are in good agreement with the characteristics reported in the literature [24,25].…”

“…The maximum dielectric constant value is obtained for plasticized polymer electrolyte for 30 wt% of PEG having one order increment in their magnitudes at room temperature. In fact, addition of plasticizer to the polymer matrix creates amorphicity in the polymeric material and as a result increase in e' is observed [23].…”

Biobased Dyes as Conductive Additives to Reduce the Diameter of Polylactic Acid Fibers during Melt Electrospinning

“…Because alizarin increased the viscosity of the melt, the higher conductivity is likely to favor the melt-electrospinning process and reduce the fiber diameter. Furthermore, electrical resistance in the liquid alizarin compounds was lower than in compounds containing alizarin but no plasticizer, indicating that the plasticizer also contributes to the higher conductivity, as reported in earlier studies [47,48]. We observed similar behavior in the liquid hematoxylin and liquid quercetin compounds, although the overall effect of quercetin on electrical conductivity was weakest.…”

Challenges of polymer electrolyte with wide electrochemical window for high energy solid‐state lithium batteries

“…39 Poly(acrylonitrile) (PAN) and poly(vinyl chloride) (PVC) have relatively wide ESW but low ionic conductivities unless a plasticizer is added or the temperature is increased. [40][41][42][43] Additionally, poly(vinylidene fluoride) (PVDF) has a symmetrical structure and high crystallinity, whose crystalline domain almost could not transport Li + . 44 However, the fluorine of PVDF is strongly attracted to electrons because it has a low HOMO.…”

“…PEO is the most commonly used polymer electrolyte, which can complexate with Li + to transport ions; however, the presence of hydroxyl group leads to a narrow ESW 39 . Poly(acrylonitrile) (PAN) and poly(vinyl chloride) (PVC) have relatively wide ESW but low ionic conductivities unless a plasticizer is added or the temperature is increased 40–43 …”