Synthesis and characterization of an electrolyte system based on a biodegradable polymer

Abstract

A polymer electrolyte system has been developed using a biodegradable polymer namely poly-ε-caprolactone (PCL) in combination with zinc triflate [Zn(CF3SO3)2] in different weight percentages and characterized during this investigation. Free-standing thin films of varying compositions were prepared by solution casting technique. The successful doping of the polymer has been confirmed by means of Fourier transform infrared spectroscopy (FTIR) by analyzing the carbonyl (C=O) stretching region of the polymer. The maximum ionic conductivity obtained at room temperature (25°C) was found to be 8.8x10–6 S/cm in the case of PCL complexed with 25 wt% Zn(CF3SO3)2 which is five orders of magnitude higher than that of the pure polymer host material. The increase in amorphous phase with an increase in salt concentration of the prepared polymer electrolyte has also been confirmed from the concordant results obtained from X-ray diffraction (XRD), differential scanning calorimetry (DSC) and scanning electron microscopic (SEM) analyses. Furthermore, the electrochemical stability window of the prepared polymer electrolyte was found to be 3.7 V. An electrochemical cell has been fabricated based on Zn/MnO2 electrode couple as an application area and its discharge characteristics were evaluated

Electrical and spectroscopic characterization of PVdF-HFP and TFSI—ionic liquids-based gel polymer electrolyte membranes. Influence of ZnTf2 salt

“…Note that high positive ε 0 values correspond to a high charge carrier density [32,40]. The inset in Fig.…”

Biodegradable polyester-based shape memory polymers: Concepts of (supra)molecular architecturing

“…From the viewpoint of (supra)molecular design the following tendencies can be predicted: Linear SMPs: creation of additional physical crosslinks through host-guest complexation and ionic clustering. For their realization researcher will adapt achievements from other fields, for example for ionic clustering the works on solid electrolytes may show the right directions [73]. Further attempts will be made to stabilize the bicontinuous structures of blends by adding nanofillers, polymeric coupling agents and even by selective crosslinking.…”

Preparation and properties of biodegradable polymer-layered silicate nanocomposite electrolytes for zinc based batteries

“…The electrochemical stability window of the best conducting sample was determined using CHI 1100A model electrochemical analyzer by employing inert stainless steel disc as working electrode and zinc metal plate as reference and counter electrodes at a scan rate of 10 mV/s from 0 to 7 V. Similarly cyclic voltammetry was performed by employing Zn/ PLSNE/MnO 2 cell at a scan rate of 10 mV/s, for which MnO 2 electrode was prepared in the approach reported in our previous work [11].…”

“…Some efforts have already been made to utilize biodegradable polymers such as starch, gelatin, cellulose acetate, chitosan, poly(e-caprolactone) (PCL) as host material for the preparation of polymer electrolytes so as to reduce their environmental impact on disposal [3][4][5][6][7][8][9][10]. In our earlier report on a polymer electrolyte system based on PCL with zinc salt, zinc trifluoromethanesulfonate (Zinc triflate, ZnTr) having 75:25 wt% respectively, a maximum electrical conductivity of 8.8 Â 10 À6 Scm À1 at room temperature was obtained [11].…”