Multiwall carbon-nanotube-doped ion conducting polymer electrolyte for electrochemical application

Abstract

Electrical, structural and optical properties of a composite containing a polymer electrolyte (namely polyethylene oxide complexed with sodium iodide) and multiwall carbon nanotube (MWCNT) are reported. The films of these composites were 'solution casted' using the viscous solution of polyethylene oxide (PEO) complexed with sodium iodide (NaI) in desired ratios and characterised using various techniques. The conductivity versus composition plot in PEO:NaI shows conductivity maxima at 12 wt% NaI concentration while in MWCNTs doped polymer electrolyte it occurs at 40 wt% MWCNTs concentration. The surface morphology by scanning electron microscopy (SEM) shows the enhancement in amorphous reason by MWCNTs doping which is a well-known favourable condition for conductivity enhancement. The differential scanning calorimetry shows that dispersal of MWCNTs reduces the crystallinity of polymer electrolyte that is well-supported by our polarised optical micrographs and SEM measurements.

Enhancement of Electrochemical Stability Window and Electrical Properties of CNT-Based PVA–PEG Polymer Blend Composites

“…Nyquist plots contain the general characteristics at a high-frequency semiarc region followed by low-frequency spikes. The semiarc corresponds to the bulk characteristics of the system, and the low frequency peak corresponds to the charge build up at the electrode–electrolyte interface. − The obtained experimental data of impedance plots were fitted with an equivalent circuit model using Zsimp Win software. The experimental data perfectly fit with the theoretical model.…”

“…It may be noted that ionic conductivity increases with temperature and suggests the thermal activation of charge carriers. An increase of temperature enhances the segmental motion of polymer chain and, hence, faster ion transport . The direct relationship between temperature and ionic conductivity is simply explained in terms of hopping mechanisms between coordination sites and movement of the polymer–salt–filler matrix component.…”

Highly sensitive voltammetric and impedimetric sensor based on an ionic liquid/cobalt hexacyanoferrate nanoparticle modified multi-walled carbon nanotubes electrode for diclofenac analysis

“…Composite materials based on integration of CNTs and some other materials to possess properties of the individual components with a synergistic effect have gained growing interest. [30][31][32]. Among the various reagents used for electrode modification, transition metal hexacyanoferrates, a class of polynuclear inorganic compounds, have attracted great attention because they belong to a group of excellent electron transfer mediators [33][34][35][36].…”

Synthesis, characterization, and dye-sensitized solar cell fabrication using solid biopolymer electrolyte membranes

“…Solid polymer electrolytes are of great interest as key components for various applications in electrochemical devices, such as fuel cells, solar cells, batteries, sensors, and super capacitors. [1][2][3][4][5][6] Of all the polymers available in the literature, polymeric electrolytes are attractive because of their fast ion conductivity due to their liquid-like conductivity (10 À2 to 10 À4 S cm À1 ). [7][8][9][10] In recent years, biodegradable biopolymers have attracted the global attention due to their various advantageous properties.…”