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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 36 for “"Open-circuit potential"”.
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Physics-Based Li-Svo Cathode Model
… particle Fick's second law approach with the open-circuit potential modeled with a Redlich-Kister equation. By assuming that lithium ions intercalate only through the ends of the cuboid SVO particles, the model is able to predict accurately the discharge profile of experimental cathode half …
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The anodic dissolution of covellite in acidic, chloride solutions
… behaviour of the mineral over a surface potential range from the open circuit potential (OCP) to about 0.62 V (vs. SHE). The electrode was mounted in an apparatus, which was designed to resemble leaching of the mineral under conditions applicable to heap leaching of whole ores, where the …
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Lithium-ion battery modeling using non-equilibrium thermodynamics
… dilute solution kinetics and a fit form of the open circuit potential to model the discharge. This work expands on this original set of equations to include concentrated solution kinetics as well as thermodynamics-based modeling of the open circuit potential. This modification is advantageous …
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Development and Evaluation of NI-P-PTFE Based Nano-Composite Coatings for Medical Devices
… and the coatings. While in the corrosion test, open circuit potential, polarization resistance (Rp), corrosion current density (Icorr), and corrosion rate (CR) were obtained by measuring the open circuit potential and anodic, cathodic tafel plots of Ni-P-PTFE-ZrO2 and Ni-P-PTFE-ZrO2-TiO2 …
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Voltage Effects on Cells Cultured On Metallic Biomedical Implants
… mechanically assisted corrosion. Surface potential of biomedical implants and excursions from resting open circuit potential (OCP), which is the voltage they attain while in contact with an electrolyte, can significantly change the interfacial properties of the metallic surfaces and alter …
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The Performance of Silicon Based Sensor and its Application in Silver Toxicity Studies
… silver in 0.0098% hydrofluoric acid based on the open circuit potential (OCP) measurement. The OCP jump of 100 ppt ionic silver solution is up to 120 mV. The complex agent can effectively suppress the ionic silver concentration and suppress the OCP signal. The ability of complex agent to suppress …
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Corrosion And Wear Resistance Of Titanium- And Aluminum- Based Metal Matrix Composites Fabricated By Direct Metal Laser Deposition
… of the MMCs were compared by monitoring open circuit potential (OCP), polarization resistance (Rp) and potentiodynamic polarization in 0.5 M NaCl to simulate exposure to seawater. The Ti-MMCs demonstrated improvements in hardness between 205% and 350% over Ti6Al4V. Al-MMCs showed …
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Solid state amperometric sensor for the in-situ monitoring of slag composition and transport properties
… recently for analysis of molten oxides. While open circuit potential measurements yield important thermodynamic information, this thesis will show that additional information can be gained by using amperometric techniques. Three different amperometric techniques were examined for use in an …
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The Effect of Lead on Dealloying and Stress Corrosion Cracking (SCC) of Ni-Cr-Fe Alloys in Boiling Caustic Environments
… of Pb addition on SS 304L was found to shift the open circuit potential towards a more positive value. It was also noted that the addition of Pb had a delaying effect on dealloying that consequently slowed SCC in comparison to the results obtained in pure caustic conditions. This effect was …
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An Investigation of Low Temperature Direct Propane Fuel Cells
… serious concerns about the existence of absolute open-circuit cell potential difference for a DPFC. The cycling behaviour observed with DPFC indicated the presence of a continuous degradation-regeneration process of the catalyst surface near open-circuit potential. The experimental work further …
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A low-cost, handheld potentiostat device capable of high-resolution measurements and IOT connectivity
… analysis, operating either by controlling the potential at the working electrode relative to a reference electrode and measuring the resulting current (potentiostatic mode) or by controlling the current and measuring the resulting potential (galvanostatic mode). The growing demand for portable …
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Abrasion-corrosion and stress corrosion resistance of a 9Cr-2Ni-0.7Mo steel in simulated mine water
… also highly resistant to sec at free corrosion potential in simulated mine water. The good abrasion-corrosion resistance is attributed to the adequate corrosion resistance of the alloy acting in conjunction with the favourable combination of strength and toughness afforded the alloy by its fine …
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Development and analysis of novel photoelectrochemical reactor for solar based clean hydrogen production
… through physical electrochemical tests including open circuit potential, linear sweep voltammetry, cyclic voltammetry and PWR potentiostatic tests for the characterization of the photoactive electrode. Energy and exergy efficiencies and hydrogen production rates are evaluated for various …
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The Redox Reaction of Anhydrous Hbr For Hydrogen Production and Bromine Hydrogen Flow Battery
… is constructed and tested with respect to open circuit potential (OCV) and V-I polarization in both charge and discharge modes as function of bromine content. Operation of this flow battery is then analyzed via a mathematical model. A key feature of this model is water transport across the …
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The study of aluminium anodes for high power density AL-air batteries with brine electrolytes
… densities > 0.2 A cm-2 can be obtained at potentials close to the open circuit potential, ~ -1.5 V vs SCE. Alloys without both tin and gallium do not dissolve at such a negative potential. The tin exists in the alloys as a second phase, typically as ~ 1 ?m inclusions throughout the …
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Impedance spectroscopy response of aluminum-copper-silicon alloys
… oxide-layer/double-layer capacitance, open circuit potential and breakdown potential of Al-Cu-Si alloys was evaluated. Electrochemical impedance spectroscopy and DC polarization techniques were combined with mechanical property evaluations to determine the relationship between the …
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Electrochemical multiphase microsensor for detection of acetylcholinesterase inhibitors
… membrane. Response is measured as change in open circuit potential between the working and reference electrodes integrated on a single chip. Due to the toxicity of OP compounds, an OP simulant (e.g. acetic anhydride) which undergoes a similar reaction mechanism has been used. The detection …
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Layer-by-layer assembled carbon nanotube nanostructures for high-power and high-energy lithium storage
… whereas the phenomenon of voltage recovery from potentials below open circuit potential can be explained in terms of competition between thermodynamically allowed oxygen redox and kinetically favorable double layer charging. Finally, a temperature study at 50*C reveals that LbL-MWNT electrodes …
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Surface studies of Li-ion and Mg battery electrodes
… was also studied, as Cu is known to form an underpotential deposition (UPD) monolayer on Au electrodes. Following this, LMO particles were coated with a Au shell by a simple and scalable electroless deposition for use as Li-ion battery cathodes. The Au shell was intended to limit the capacity fade …
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A Non-Biological Inhibition Based Sensing Technique (NIBS) for the Detection of Halogenated Disinfection By-Products in Water
The purpose of this work is to apply a newly developed technique, non-biological inhibition based sensing (NIBS), for the detection of toxic halogenated disinfection by-products in water. NIBS is a chemical amplification method where the analyte of interest inhibits a given catalyzed reaction …
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