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We report the development of a proton conducting polymer electrolyte using Polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP) and Cellulose acetate propionate (CAP). A blend polymer membrane is made with PVDF-HFP and CAP with the ratio 50:50. By adding different weight ratio of ammonium thiocyanate (ATC) to the blend polymer, a proton conducting polymer electrolyte was prepared. Dielectric study and temperature dependence ionic conductivity study are done by electrochemical impedance spectroscopy. Ionic conductivity is found to increase with the increase in the dopant concentration. A proton battery is constructed and its performance is studied. [ABSTRACT FROM AUTHOR]

In this paper, a Polyvinylidene fluoride (PVdF), Polymethylmethacrylate (PMMA), and Polystyrene (PS) blend nanofiber electrolyte membrane was prepared by using the electrospinning method. In which the ratio of PMMA and PS is different. As the produced electrospun nanofibers, the polymer electrolyte membranes were characterized by scanning electron microscopy for morphology, FTIR for miscibility, XRD, DSC and TGA for crystallinity and thermal properties. The blended nanofibrous membrane of PVdF/PMMA/PS showed higher electrolyte uptake, higher porosity, and higher ionic conductivity when compared to pure PVdF. The ionic conductivity of the polymer blend electrolyte membrane is 2.50x10−2 S cm-1. Charge-discharge curves of the first cycle of mixing the polymer electrolyte with PVdF: PMMA: PS (80:15:05) at room temperature using the cell above gave an initial discharge capacity of 163 mAhg−1. The PVdF: PMMA: PS (80:15:05) mixed polymer electrolyte membrane maintained a discharge capacity of 160mAhg-1 after 50 cycles. This indicates good retention of discharge capacity even after 50 cycles. PVdF/PMMA/PS blended nanofiber polymer electrolyte membranes have proven to be good separators for lithium-ion battery applications. [ABSTRACT FROM AUTHOR]

Increased awareness over environmental safety has led to production of biocompatible materials in the area of energy storage. In the present work biodegradable polymer blend electrolytes based on two different weight percentages of Polyvinyl alcohol with Neem gum(NG) and Commiphora gum(CG) are been investigated for their Li-ion conductivity. The electrolytes were prepared using traditional and cost effective solution casting technique. Structural and vibrational properties of the prepared biopolymer blend electrolytes reveal the amorphous nature and enhanced incorporation of Li-ions inside the polymer matrix. Ionic conductivity reflected from AC impedance analysis is found to be 4.83× 10−5 S/cm for PVA: NG: LiClO4 and 1.418×10−5 S/cm for PVA:CG:LiClO4 blend in room temperature respectively. Frequency plateaus and relaxation time measurements display the easier ionic movement inside the prepared polymer blend. The derived results depict the prepared electrolytes applicability in high safety green energy storage systems. [ABSTRACT FROM AUTHOR]

In this research, the different formulation composition of PVA and PVP were prepared and characterized as conductive polymer coatings. The research was done by using different loadings of PVP in polymer blends film which were 2.5g, 5.0g, and 7.5g of PVP. The physiochemical properties of these blends films have been studied in detail by FTIR, optical microscopy and impedance spectroscopy. The ionic conductivity was found to be greatly dependent on PVP content. The maximum value of ionic conductivity was given by 7.5g of PVP addition which is 0.30 Scm-1. Highest conductivity of 0.50 Scm-1 at room temperature was achieved for PVA/PVP in a mass ratio of 1:0.75 immersion in 8 M aqueous KOH solution. Optical microscopy revealed a highly ordered surface structure of PVA/PVP polymer blends. FTIR spectra showed that these ionic conductivities may be attributed to the high concentration of KOH that bound to the polymer molecule. The increased in the conductivity with the different composition of PVA/PVP may be utilized as alternative material in application of conductive coatings such as solar panel. [ABSTRACT FROM AUTHOR]

Blend polymer electrolytes of polyvinyl alcohol and polyvinyl pyrrolidone were prepared with different molecular wt% ratios of MgCl2.6H2O by solution cast technique. Electrical conductivity measurements for the prepared films were performed using Keithley electrometer model 6514 and the maximum ionic conductivity was found to be 1.01x10−3 S/cm at 373 K for the prepared composition of 35PVA/35PVP:30MgCl2.6H2O. The maximum ionic conductivity of polymer electrolyte has been used in fabrication of electrochemical cell with the configuration of Mg+/(PVA/PVP+MgCl2.6H2O)/(I2+C+electrolyte). [ABSTRACT FROM AUTHOR]

In the present work, a polymer electrolyte blend containing polymers Poly ethylene oxide (PEO) and Poly (vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) was prepared. The polymer blend was complexed with potassium trifluoromethanesulfonate (KCF3SO3), and titanium oxide nanoparticles (TiO2) (10nm size) were dispersed in to the complex at different weight percentages. The conductivity due to ions in the blend is determined by Ac impedance measurements in the frequency range of 10Hz-1MHz. The nano composite polymer blend containing 5wt% of TiO2 shows a conductivity of 7.95×10−5Scm-1, which is almost 1.5 orders more than polymer electrolyte with PEO as a polymer. XRD studies show a decrease in the coherence length of XRD peaks on addition of nanoparticles, which is due to increase the amorphous phase in the systems. Temperature dependence conductivity studies of the systems shows that, activation energy decreases with increase in the percentage of nanoparticles in the blend. [ABSTRACT FROM AUTHOR]

Polymer electrolytes with PVC-PEG blend as host matrix and LiClO4 as dopant salt was prepared through conventional solution casting method. To enhance the conductivity propylene carbonate (PC) was used as plasticizer. The influence of ceramic filler Al2O3 on the conductivity of the electrolyte films were studied by varying the (PVC: Al2O3) ratio. The films were subjected to XRD, complex impedance analysis and SEM analysis. The XRD studies reveal a marginal increase in the amorphous phase of the electrolyte films due to the incorporation of filler. The AC impedance analysis shows the dependency of ionic conductivity on the content (wt %) of filler and exhibit a maximum at 4 wt% filler. The SEM analysis depicts the occurrence of phase separation in electrolyte which is attributed to the poor solubility of polymer PVC in the liquid electrolyte. [ABSTRACT FROM AUTHOR]