Author
K. Sudhakarbabu
Bio: K. Sudhakarbabu is an academic researcher from Sri Krishnadevaraya University. The author has contributed to research in topics: Thermal decomposition & Quadrupole mass analyzer. The author has an hindex of 2, co-authored 2 publications receiving 16 citations.
Papers
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TL;DR: In this article, the authors studied the thermal decomposition of tetraethyl ammonium tetrafluoroborate in an inert atmosphere of pure Helium gas at a sample heating rate of 5 kmin−1 employing a platinum crucible.
Abstract: Thermal decomposition of tetraethyl ammonium tetrafluoroborate has been studied employing simultaneous techniques of TG–DTG–DSC—quadrupole mass spectrometric techniques in an inert atmosphere of pure Helium gas at a sample heating rate of 5 K min−1 employing a platinum crucible. The observed decomposition paths are the most commonly expected Hofmann elimination and substitution reactions paths.
13 citations
TL;DR: In this article, the thermal decomposition of benzyl-triethyl-ammonium tetrafluoroborate (BTEATFB) employing simultaneous TG-DSC coupled with a quadrupole mass spectrometer is considered.
Abstract: Mechanistic aspects of the thermal decomposition of benzyl-triethyl-ammonium tetrafluoroborate (BTEATFB) employing simultaneous TG-DSC coupled with a quadrupole mass spectrometer are considered in this work The experiments were conducted in an inert atmosphere of helium The decomposition of BTEATFB proceeds through several competing mechanisms While nucleophilic substitution reaction occurs through the formation of a tertiary amine and plays an important role in the initial stages of the decomposition, and the probability of Hoffman elimination also exists
6 citations
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01 Aug 2011
TL;DR: In this article, the authors developed a model for simulating the electric double layer dynamics in CV measurements while simultaneously accounting for transport phenomena in both the electrode and the electrolyte, and established that the hump in CV curves for electrodes with large radius of curvature was due to the saturation of ion concentration near the electrode surface before reaching the maximum potential.
Abstract: This paper aims to develop a model for simulating the electric double layer dynamics in CV measurements while simultaneously accounting for transport phenomena in both the electrode and the electrolyte. It also aims (i) to identify the dimensionless parameters that govern the CV measurements, (ii) to provide a physical interpretation of the shape of CV curves, and (iii) to investigate the effect of the electrode electrical conductivity on the predicted double layer capacitance. The transient double layer dynamics was simulated using the modified Poisson–Nernst–Planck (MPNP) model with a Stern layer and accounting for the presence of the electrode. A dimensional analysis was performed and four dimensionless numbers governing the CV measurements were identified. This study established that the hump in CV curves for electrodes with large radius of curvature was due to the saturation of ion concentration near the electrode surface before reaching the maximum potential. It also demonstrates that CV curves became symmetric for large ion diffusion coefficient due to rapid ion transport. This study confirmed that the EDL capacitance retrieved from CV measurements is constant for low scan rates and corresponds to the capacitance under equilibrium conditions. Larger ion diffusion coefficient and electrode electrical conductivity led to larger EDL capacitance at large scan rates corresponding to better charging performance.
139 citations
TL;DR: In this article, the main pathways for the formation of Pd nanoparticles and clusters from various precatalysts in catalytic systems, as well as current views on the mechanisms of stabilization of these nanosized Pd particles using various types of ionic nitrogen compounds, such as ammonium, amidinium, azolium, and pyridinium salts, are discussed.
34 citations
TL;DR: In this article, the aging properties of supercapacitors are reviewed with regard to the state-of-the-art and the latest findings, and the long-term stability of various electrolyte systems and carbon materials is critically examined under phenomenological aspects that reflect the typical fault pattern of supercaptacitors.
Abstract: The capacitance values printed on capacitor housings do not reflect the actual capacitance available for any technical application. The complex properties of the pseudocapacitance and the aging behavior of practical supercapacitors are reviewed with regard to the state-of-the-art and the latest findings. The long-term stability of various electrolyte systems and carbon materials is critically examined under phenomenological aspects that reflect the typical fault pattern of supercapacitors. Electrolyte resistance and voltammetric capacitance are reliable aging indicators. High temperatures have a greater impact on service life than high voltages, and overvoltages are worse than high currents. The anode more than the cathode suffers from a loss of pore volume, increase of nitrogen and fluorine compounds, and the unstable adhesive layer between active carbon and aluminum. Unwanted material changes and chemical reactions in the supercapacitor reflect the influence of water over several years in the life test. Credible reaction pathways are identified for the known aging processes. Fundamentals and materials are reviewed in a separate part.* *
32 citations
TL;DR: A recycling approach for end-of-life supercapacitors based on shredding and mild thermal treatment to recycle the organic solvent contained in the activated carbon electrodes and the recycled acetonitrile has a high purity.
25 citations