Argentophilic pyridinic nitrogen for embedding lithiophilic silver nanoparticles in three-dimensional carbon scaffold for reversible lithium plating/stripping

Reversible lithium metal plating and stripping is required for durable operation of lithium metal batteries. Three-dimensional architecture has been employed for accommodating volume change of lithium metal during repeated plating...

Theoretical Description for Sucralose Cathodical Electrochemical Determination on the Conducting Polymer, Containing Pyridinic Nitrogen Atoms

A novel process for sucralose cathodically electrochemical determination has been suggested. In this process, the conducting polymer with pyridinic nitrogen atoms reacts specifically with sucralose, yielding a salt. This salt is thereby reduced gradually, yielding a less conducting macromolecule. The analysis of the correspondent mathematical model, realized through the linear stability theory and bifurcation analysis, shows that the oscillatory behavior is more probable to be realized due to charge changes and rearrangements during the electroanalytical process its influence on the surface and DEL conductivity. Nevertheless, this process may be efficient for the sucralose electrochemical determination.

Effects of Ionic Liquid and Biomass Sources on Carbon Nanotube Physical and Electrochemical Properties

The ongoing research toward meeting global energy demands requires novel materials from abundant renewable resources. This work involves an investigation on nitrogen-doped carbon nanotubes (N-CNTs) synthesized from relatively low-cost and readily available biomass as carbon precursors and their use as electrodes for supercapacitors. The influence of the ionic liquid 1-butyl-3-methylimidazolium chloride, or its combination with either sugarcane bagasse or cellulose (IL-CNTs, ILBag-CNTs, and ILCel-CNTs, respectively), in the synthesis of N-CNTs and the resultant effect on their physical and electrochemical properties was studied. Systematic characterizations of the N-CNTs employing transmission electron microscopy (TEM), thermogravimetric analysis, X-ray photoelectron spectroscopy (XPS), elemental analysis, nitrogen sorption analysis, cyclic voltammetry, and electrochemical impedance spectroscopy were performed. TEM data analysis showed that the mean outer diameters decreased, in the order of IL-CNTs > ILBag-CNTs > ILCel-CNTs. The N-CNTs possess only pyridinic and pyrrolic nitrogen-doping moieties. The pyridinic nitrogen-doping content is lowest in IL-CNTs and highest in ILCel-CNTs. The N-CNTs are mesoporous with surface areas in the range of 21–52 m2 g−1. The ILCel-CNTs had the highest specific capacitance of 30 F g−1, while IL-CNTs has the least, 10 F g−1. The source of biomass is beneficial for tuning physicochemical properties such as the size and surface areas of N-CNTs, the pyridinic nitrogen-doping content, and ultimately capacitance, leading to materials with excellent properties for electrochemical applications.