Development of Flexible Plasticized Ion Conducting Polymer Blend Electrolytes Based on Polyvinyl Alcohol (PVA): Chitosan (CS) with High Ion Transport Parameters Close to Gel Based Electrolytes

Abstract

In the current study, flexible films of polyvinyl alcohol (PVA): chitosan (CS) solid polymer blend electrolytes (PBEs) with high ion transport property close enough to gel based electrolytes were prepared with the aid of casting methodology. Glycerol (GL) as a plasticizer and sodium bromide (NaBr) as an ionic source provider are added to PBEs. The flexible films have been examined for their structural and electrical properties. The GL content changed the brittle and solid behavior of the films to a soft manner. X-ray diffraction (XRD) and Fourier transform infrared (FTIR) methods were used to examine the structural behavior of the electrolyte films. X-ray diffraction investigation revealed that the crystalline character of PVA:CS:NaBr declined with increasing GL concentration. The FTIR investigation hypothesized the interaction between polymer mix salt systems and added plasticizer. Infrared (FTIR) band shifts and fluctuations in intensity have been found. The ion transport characteristics such as mobility, carrier density, and diffusion were successfully calculated using the experimental impedance data that had been fitted with EEC components and dielectric parameters. CS:PVA at ambient temperature has the highest ionic conductivity of 3.8 × 10 S/cm for 35 wt.% of NaBr loaded with 55 wt.% of GL. The high ionic conductivity and improved transport properties revealed the suitableness of the films for energy storage device applications. The dielectric constant and dielectric loss were higher at lower frequencies. The relaxation nature of the samples was investigated using loss tangent and electric modulus plots. The peak detected in the spectra of tanδ and M” plots and the distribution of data points are asymmetric besides the peak positions. The movements of ions are not free from the polymer chain dynamics due to viscoelastic relaxation being dominant. The distorted arcs in the Argand plot have confirmed the viscoelastic relaxation in all the prepared films.

Supercapacitor using polyvinyl alcohol doped ionic liquid 1‐butyl‐1‐methylpyrrolidinium hexafluorophosphate polymer electrolyte system

“…The FTIR spectra of pure IL, pure NaI, and PVA/30wt%NaI/6wt%IL PE film are done using a Perkin‐Elmer (USA) Spectrophotometer (model 833) shown in Figure 3. In pure PVA, 15 the O‐H stretching vibration occurred at 3259.34 cm −1 , while peak at 1653.51 cm −1 in pure PVA was caused by C=C stretching. The notable peak at C‐H bending vibration occurred around 834.16 cm −1 .…”

“…Porous carbon layer‐based EDLC electrodes are prepared by coating technique 15,16 . Graphite sheets are used as current collectors for EDLC by cutting into an area of 1 × 1 cm sq.…”

“…Porous carbon layer-based EDLC electrodes are prepared by coating technique. 15,16 Graphite sheets are used as current collectors for EDLC by cutting into an area of 1 Â 1 cm sq. After that, a slurry or a homogeneous mixture of Poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and porous carbon is produced by adding 10% of PVDF-HFP.…”

Facile Enhancement of Electrochemical Performance of Solid-State Supercapacitor via Atmospheric Plasma Treatment on PVA-Based Gel-Polymer Electrolyte

“…In all cases, characteristic peaks corresponding to the O–H, C=O, and C–O stretching vibrations and C–C stretching vibration were observed at 3290, 1730, 1086, and 842 cm −1 , respectively [ 53 , 54 , 55 , 56 ]. Additionally, minor peaks with low intensities were detected for C–H stretching, C–H bending, and O–H bending at 2932, 1424, and 1325 cm −1 , respectively [ 56 , 57 , 58 ]. As the applied plasma power was increased up to 120 W, the absorbance of hydrophilic groups such as O–H, C=O, and C–O increased whereas that of the C–C group decreased [ 59 , 60 ].…”

Investigations on anomalous behavior of ionic conductivity in NaPF6 salt loaded hydroxyethyl cellulose biodegradable polymer electrolyte for energy storage applications

“…The plot shows an incomplete half semicircle indicating the relaxation process is non‐Debye type. If the Argand diagram show complete semi‐circular behavior, then the relaxation is conductivity relaxation, otherwise it is due to viscoelastic (polymer‐molecular) relaxation 45 . With the increase in the salt concentration, the intersection with the real axis does not shift for H0–H2.…”