Global ETD Search
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 21 for “"negative electrode"”.
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Lithium ion power generator : a novel system for direct thermal to electric energy conversion
… effect of the system. LiCo02 used as a positive electrode with LiV2Os as a negative electrode (LCO/LVO) could theoretically generate 0.9mvK-1 in the dual-temperature system. Additionally, LCO/LVO cells used in conjunction with LiNio.Mno.1Co0.1O2 used as a positive electrode and LiFePO 4 used as a …
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Surface Coverage and Structure of Catalytic Monolayers on Au(111) Electrodes
… indicate that it binds to the Au(111) electrode throughout the double layer potential region. At positive potentials, it delays the onset of gold oxide formation. At extreme negative electrode potentials, the anion desorbs from the surface, confirming activity observed with SPM. Quartz …
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Technical and economic feasibility of a high-temperature self-assembling battery
… solid phase, the novel three-layer liquid-phase electrode-electrolyte-electrode cell facilitates high diffusivity and facile interfacial kinetics, which results in rapid ion transport and low activation overpotential. In addition to the extremely high currents enabled by the absence of …
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Electrically evoked motions of the isolated mouse tectorial membrane
… TM surface shows that the TM expands near the negative electrode and contracts near the positive electrode with a stationary pivot point between the two electrodes. Lowering the pH in the bath surrounding the TM from 7.3 to 4.07 decreased the maximum amplitude of displacement from 4 nm to …
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Understanding electronic structure and interfaces of positive electrodes for lithium ion batteries
… One of the key parameters to study is electrode/electrolyte interface of electrodes. EEI on the negative electrode, also known as Solid Electrolyte Interphase (SEI) has the well-known structure with organic and inorganic compounds. Although EEI on negative electrodes is well known, it …
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Liquid metal batteries : ambipolar electrolysis and alkaline earth electroalloying cells
… 500 0C was first investigated by two- and three-electrode electrochemical analysis techniques. The electrochemical behavior of the melt, thermodynamic properties, and kinetic properties were evaluated. A single cell battery was constructed, demonstrating for the first time the simultaneous …
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Stopping self-discharge in metal-air batteries
… boast high theoretical energy densities, but negative electrode corrosion can severely reduce their usable capacity and commercial utility. Most methods to mitigate corrosion focus on electrode and electrolyte modification such as electrode alloying, electrolyte additives, and gel and …
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Polymer Electrolytes For lontophoretic Drug Delivery
… the skin, by placing it under the positive electrode where it is repelled and attracted toward a negative electrode positioned elsewhere on the body. For the successful operation of this process, the drug must be incorporated into a 'patch-like’ delivery system. Polymer electrolytes offer …
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Non-equilibrium thermodynamics in porous media : battery degradation, and sorption and transport in porous materials
… interphase layer on the surface of the negative electrode. I develop a single-particle model of this fade mechanism, based on diffusion of the reacting species through the growing layer and reaction at the surface of the active material. This analytical model is justified by comparison …
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MPSA Effects on Copper Electrodeposition: Understanding Molecular Behavior at the Electrochemical Interface
… non-specific solid surfaces and copper metal electrodes. <em>Ab initio</em> quantum-mechanical calculations are reported and define the interatomic potentials in the simulations. Some of the quantum-mechanical calculations involve small copper clusters interacting with …
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NMR Studies of Interfacial Reactions in Lithium-Ion Batteries
… Preventing the parasitic reactions between the electrodes (positive and negative) and the electrolyte solution, is essential for enabling longer lasting lithium-ion batteries. In this work, solution- and solid-state nuclear magnetic resonance (NMR) methodologies are developed for studying the …
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Layer-by-layer assembled carbon nanotube nanostructures for high-power and high-energy lithium storage
… is utilized to incorporate positively- and negatively-charged electroactive species in self-assembled electrodes that are binder- and additive- free. This work first studies electrochemical performance of LbLassembled functionalized multiwall carbon nanotube (MWNT) electrodes as positive …
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Economic assessment of candidate materials for key components in a grid-scale liquid metal battery
… is the most likely candidate for the positive electrode due to its large, mature market and the relatively high energy output compared to other candidates. Alkali and alkaline earth materials make excellent candidates for the negative electrode and the vast quantities available will be more …
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Design of electrode for electrochemical energy storage and conversion devices using multiwall carbon nanotubes
… (LbL) assembly of surface functionalized MWNTs. Negatively and positively charged MWNTs were prepared by surface functionalization, allowing the incorporation of MWNTs into highly tunable thin films via the LbL technique. The pH dependent surface charge on the MWNTs gives this system the unique …
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Microfluidic Devices for Neural and Behavioral Screening of C.Elegans using Electric Field
… the electric field (EF) by swimming towards the negative electrode in a polarized system like a microchannel. The current electrotaxis microfluidic devices have a large footprint, low-throughput, and are slow due to their dependency on gait behaviours in terms of speed, body bend frequency, and …
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High power li-Ion battery performance: a mechanistic analysis of aging
… of linear loss of active material (LAM) on the negative electrode (NE). The dynamic stress cycling caused rapid cell degradation, reaching 1100 cycles at end-of-life. The degradation is caused by large LAM on the NE, and in less degree, LLI. Moreover, the cell exhibited Li plating, which was …
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Elucidating the mechanisms behind pre-breakdown phenomena in transformer oil systems
… oil stressed by a positively charged needle electrode results in the ionization of oil molecules into positive ions and electrons. The highly mobile electrons are swept back towards the positive electrode leaving a net positive space charge region that propagates towards the negative …
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Elektrochemické vlastnosti záporné elektrody tvořené přírodním a expandovaných grafitem
Táto bakalárska práca sa zaoberá problematikou lítiových akumulátorov z pohľadu konštrukcie, princípu a použitia. Teoretická časť práce sa zameriava sa na štúdium materiálov na výrobu záporných elektród, zvlášť na prírodný a expandovaný grafit. Objasňuje princíp a konštrukciu lítiového akumulátora …
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