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Showing 1 to 20 of 70 for “"Galvanostatic"”.
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The mechanism of galvanostatic voltage oscillations in formic acid
Thesis: B.S., Massachusetts Institute of Technology, Department of Chemistry, 1964
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Investigation of New, Low-Voltage, Aluminum, Sacrificial Anode Chemistries
… study, open circuit potential, potentiostatic, galvanostatic and Tafel tests were performed on eleven high-purity aluminum-based binary and ternary alloys containing Bi, Ga, In and Zn in an effort to understand the individual effects of each element and the interactions between these elements. …
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Anodic films on Bismuth
… surface. Film nucleation was also studied by the galvanostatic step and potentiostatic step methods. The rate of spreading of the oxide patches over the surface was shown to be controlled by the magnitude of the surface area still uncovered. Film thickening was studied using both galvanostatic and …
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Lifetime prediction for lithium-ion batteries undergoing fast charging protocols
… (LiFePO₄ LFP)/graphite cells subject to mixed galvanostatic and potentiostatic fast charging policies. Porous Electrode Theory is used to predict battery lifetime by parameteric reductions of effective solid-phase Fickian diffusivities, electrolytic Stefan-Maxwell diffusivity, and Butler-Volmer …
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Electrochemically driven phase transformation in energy storage compounds
… performed in-situ during potentiostatic and galvanostatic cycling, combined with phase-field modeling, to reveal a remarkable dependence of phase transition pathways on overpotential in the model olivine Lii. ,FePO 4. For a sample of particle size -113 nm, at both low (e.g., <20 mV) and high …
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Effect of Additives and Substrate Resistance on Shape Evolution During Electrodeposition: Nucleation, Growth and Trench Infill for Copper Interconnects
… near the far end of Ru films than the steady galvanostatic deposition.
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Synthesis and Characterization of Polymer Composite Materials For Lithium Battery Cathodes and Capacitors
… characterization was carried out by performing galvanostatic discharge, pulse discharge and AC-impedance experiments. The composite electrodes yielded a higher discharge capacity and a better pulse discharge capability when compared to the pristine SVO electrode. The pulse discharge and …
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High Frequency Study of Magnetic Nanostructures
… in commercial AAO template in constant current (Galvanostatic) mode, further we tried to estimate the growth rate from theory, from saturation magnetization and direct measurement from SEM image.</p> <p>In part two we focused on using the Vector Network Analyzer (VNA) to measure the Ferromagnetic …
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Bioactive surfaces for improved coronary stent performance
… was examined. Coatings produced by either galvanostatic or potentiostatic electropolymerisation were immersed in phosphate buffered saline and the release of salicylate monitored over time using UV-spectroscopy. Both polymerisation methods released a similar total mass of drug (~12 µg), …
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The anodic oxidation of metals
… circuit transients applied at intervals along galvanostatic oxidation transients, The dependence of the c4rrent density, i, on the overpotential, V, is expressed in an equation of the form i = io exp(V/vo), and values are given for io and Vo' Under galvanostatic conditions the parameter Vo …
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Studies of bronze electrodeposition.
… and anode and cathode current densities under galvanostatic conditions. The results from these tests have been interpreted and a set of optimum bath conditions has been decided upon to achieve deposits of a desired composition and properties. Further studies have been carried out to determine …
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The Development of M3+-Doped Mesoporous Ti4O7 Electrode for Pharmaceutical Degradation in Fresh Human Urine
… degradation performance are collected by galvanostatic test and pharmaceutical degradation rate in a full synthetic urine matrix with four common pharmaceuticals. Our results show that the Cobalt (Co3+) doped-mesoporous Ti4O7 electrodes have a 30 hours lifetime and were able to degrade …
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Lateral Interactions of Corroding Pits
… growth in the lateral direction. However, galvanostatic experiments showed that the pit growth rate was limited by the amount of current available and surface area.
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Electrochemical engineering considerations for gas evolution in molten sulfide electrolytes
The current interrupt and galvanostatic electrochemical impedance spectroscopy techniques were utilized to characterize the ohmic, charge transfer, and mass transfer over-potential behavior of gas evolving electrodes in aqueous, molten chloride, and molten sulfide electrolyte solutions under …
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Electrochemical and microstructural studies of AlPO₄-nanoparticle coated LiCoO₂ for lithium-ion batteries
… alongside the microstructure of the coating. The galvanostatic charge profile is studied with electrochemical impedance tests conducted at various lithium contents during charging. The coating is found to increase the flatness of the two-phase region plateau and to cause the appearance of the …
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Determination of the synthesis diagram of sodium cobalt oxide and electrochemical study
… larger composition range from 0.68 to 0.76. Galvanostatic charging on O3-Na₁.₀₀CoO₂ battery reveals several plateaus and steep steps on the voltage curve, the corresponding phase transitions and solid solution behaviors were studied by a simultaneous in situ XRD experiment. The composition …
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Synthesis and characterization of high-performance supercapacitor devices based on carbon/MnO2 composite and carbonized iron cations adsorbed onto polyaniline/nickel graphene foam
… with capacity retention of 91% over 10 000 galvanostatic charge-discharge cycles at 5 A g-1. The stability of the device was also tested using the voltage holding and self-discharge approach whereby a slow-discharging process was observed, which suggests the practical application of the …
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Electrochemical behavior of a liquid tin electrode in molten ternary salt electrolyte containing sodium chloride, aluminum chloride, and tin chloride
… is conducted using cyclic voltammetry and the galvanostatic pulse method. The liquid metal electrode is found to have suitably fast kinetics with an exchange current density of 92 mA/cm2. Parameters for a new Na+ conducting membrane are proposed, requiring an ionic conductivity of 0.056 S/cm, …
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Electrochemical conversion of a fluorinated greenhouse gas using a lithium battery configuration
… at an electrode - electrolyte interface. Galvanostatic discharge demonstrated that the reaction between Li and SF 6 is capable of delivering modest cell voltages up to - 2.4 V vs. Li/Lie and capacities up to ~3800 mAh/gc. The electrochemical reaction between Li and SF6 in two different …
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A study of electrochemical hypochlorite cells
… experimental equipment was carried out under galvanostatic conditions (ie at constant current). Variations in the concentration of the products (NaOC1, NaC103,02' H2) as well 'as total volume of gas produced were monitored as a function of time. The variables studied include electrolyte (NaCl) …
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