Effect of Glycerin on Electrical and Thermal Properties of PVA/Copper Sulphate Gel Polymer Electrolytes

Abstract

Copper-ion conducting gel polymer electrolyte (GPE) systems based on polymer poly(vinyl alcohol) (PVA) and copper sulphate salt doped with glycerin as plasticizer have been synthesized by using solution casting method. Differential scanning calorimetry is used to examine the thermal effect of glycerin on a plasticized polymer electrolyte (DSC). With the addition of various quantities of glycerin, as a plasticizer in pure PVA and PVA+20wt.%CuSO 4 gel polymer electrolyte shows a decrease in the values of melting temperature (54.34°C), glass transition temperature (37.22°C) and percentage of crystallinity (11.65%). Compared to pure PVA, thermal degradation measured from TGA curve for the plasticized gel electrolyte is shifted to lower temperatures and the weight loss of the polymer electrolyte increase with increase of glycerin concentration. From DTG, the temperature of maximum decomposition for PVA is 283.4 o C, and it is decreased with adding 20 wt.% CuSO 4 and upon increased concentration of the plasticizer from 1 to 3 mL of glycerin. For pure PVA and PVA+20wt.% CuSO 4 , ε′ decreases with increasing glycerin concentration and peaks at 3 mL glycerin concentration. The maximum ionic conductivity obtained was 9.39×10 -4 S/cm for PVA+20wt.%CuSO 4 +3 mL glycerin.

Engineering of core@double‐shell structured Zn@ZnO@PS particles in poly(vinylidene fluoride) composites towards significantly enhanced dielectric performances

“…The enhanced low‐frequency permittivity is attributed to the excessive charge carriers' inhibiting effect at the interfaces facilitating the IP, and the high‐frequency one is also enhanced owing to the construction of insulating PS shell promoting the intraparticle quick polarization of Zn@ZnO@PS. Thus, the use of the second PS interlayer synchronously promotes the slow IP at lower frequencies and the fast intraparticle polarization at higher frequencies thereby showing much high permittivity than other cases 41,43 . Furthermore, it is revealed that the PS thickness possesses an evident impact on the permittivity of composites, and at an optimal PS thickness like Zn‐3 the highest permittivity can be reached due to maximally induced IP effect in the composites.…”

“…Thus, the use of the second PS interlayer synchronously promotes the slow IP at lower frequencies and the fast intraparticle polarization at higher frequencies thereby showing much high permittivity than other cases. 41,43 Furthermore, it is revealed that the PS thickness possesses an evident impact on the permittivity of composites, and at an optimal PS thickness like Zn-3 the highest permittivity can be reached due to maximally induced IP effect in the composites.…”

Effect of silver nanoparticles on structural, thermal, electrical, and mechanical properties of poly(vinyl alcohol) polymer nanocomposites

“…Charge carrier mobility, charge carrier concentration, the impact of space charge, carrier hopping in the localized state, and charge carrier stimulation to higher states in the conduction band may all be responsible for the increase in conductivity that occurs with an increase in AgNPs volume percent. [ 34,41 ]…”

Optical transparency of electrospun nanofibrous membranes: A study on influencing parameters

“…24 It should be noted that the crystallinity of a polymeric material can be altered by heat treatment. [25][26][27] When the temperature rises above the polymer glass transition temperature, the polymer crystallinity is reduced. 28,29 The heat treatment of the produced electrospun nanofibers is proven feasible to increase its transparency.…”