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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 32 for “"porous electrodes"”.
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Experimental Studies of Flow-Through Porous Electrodes
Made available in DSpace on 2014-12-13T18:55:34Z (GMT). No. of bitstreams: 1 7726670.pdf: 4035169 bytes, checksum: 2bdeea1868f85a3eb98dc4dc169154c5 (MD5) Previous issue date: 1977
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Transient Behavior in Porous Electrodes During Reactant Depletion
Made available in DSpace on 2014-12-10T21:24:54Z (GMT). No. of bitstreams: 1 7500401.pdf: 5601521 bytes, checksum: f4b7330a1b515a748e87635758943920 (MD5) Previous issue date: 1974
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Nonequilibrium thermodynamics of porous electrodes for lithium-ion batteries
… its ability to capture both single particle and porous electrode experimental data. Second, we connect a model of electrochemical kinetics that is well-established in the chemistry community to nonequilibrium thermodynamics and apply it to materials with phase separating electrodes. We …
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Fabrication, characterization, and optimization of porous electrodes for electrochemical desalination
… removal of salt ions from water due to Faradaic electrodes, such as those composed of Prussian blue analogues (PBAs), having high ion storage capacity. However, when compared with desalination technologies such as reverse osmosis, FDI is currently limited by impractically high energy consumption …
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Experimental and Theoretical Investigations of Multiple Reaction Sequences in Flow-Through Porous Electrodes
Made available in DSpace on 2014-12-13T18:55:41Z (GMT). No. of bitstreams: 1 7915356.pdf: 6498753 bytes, checksum: c81703556294e5651fdca97655812108 (MD5) Previous issue date: 1979
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Investigation of Flow-by Porous Electrodes With Two-Phase Electrolyzers (Mass Transfer, Drops, Extraction)
Solubilizing reactants and products in electrolytes of high conductivity is an important aspect of industrial systems such as flow-through batteries and electro-organic syntheses. Two-phase processes appear to be promising because they can be used to meet competing requirements for high mass …
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Learning the Electrochemistry of Degradation and Safety in Graphite Porous Electrodes for Lithium-ion Batteries
… at multiple scales - from single particle to porous electrode to the battery pack. Insights obtained from experimentation on a given scale to inform modeling, often performs poorly when it comes to prediction at other scales, limiting applicability. This thesis is a small part of a …
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Homogeneous Catalysis in Flow-by Porous Electrodes Containing Gas-Liquid Flow (Mass Transfer, Redox Catalyst, Oxygen Electrode)
Transport and reaction in a porous electrode containing gas-liquid flow and a dissolved catalyst were studied. Dimensionless criteria were developed for the selection and evaluation of candidate catalysts.
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Design of high-ionic conductivity electrodes for direct methanol fuel cells
Carbon-supported porous electrodes are used in low-temperature fuel cells to provide maximum catalyst surface area, while taking up little volume and using minimum catalyst material. In Direct Methanol Fuel Cells (DMFCs), however, much of the catalyst included in the anode is significantly …
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Finite element modeling of lead acid batteries
… to the macrohomogeneous theory for flooded porous electrochemical cells, more specifically lead-acid cells. One- and two-dimensional finite element models are developed for flooded porous electrochemical lead acid cells. Chapter One introduces the background of the technology of lead-acid …
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Untersuchungen zu den Eigenschaften der Anode der Festoxid-Brennstoffzelle (SOFC)
… parts of the anodes, which are described as porous electrodes, and by the partial contacting of the anodes. A major contribution to it is provided by the nickel matrix in the anodes. The high frequency relaxation in the spectra is assigned to the transfer reaction, the low frequency to a gas …
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Modeling of solid oxide fuel cells
… dusty-gas model (DGM) for gas transport in the porous electrodes, the detailed heterogeneous elementary reaction kinetics for the thermo-chemistry in the anode, and the detailed electrode kinetics for the electrochemistry at the triple-phase boundary. With regard to the DGM, we corrected the …
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Designer Porous Carbon Electrodes for Redox Flow Batteries
Porous carbon electrodes play an important role in electrochemical systems by providing electrocatalytic sites to facilitate faradaic reactions, distributing reactants and products, and conducting electrons and heat. The microstructure and surface chemistry of such electrodes are of particular …
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Towards Colloidal Self-Assembly for Functional Materials
… were studied to explore their applicability as porous electrodes and SERS substrates, respectively. Subsequently, silica nanoparticles were assembled into nanostructures that preferentially scatter blue light using both DNA and polymer-colloid interactions. Finally, rod-sphere structures made …
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Organic fouling in membrane capacitive deionization systems
… stores ions in the electrical double layer of porous electrodes. For most low-salinity water treatment technologies, fouling is a central issue, but few studies examine the its impact on MCDI. Fouling was evaluated using synthetic saline solutions with a combination of NaCl and CaCl2 and the …
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Effect of permeation of discharge characteristics of capacitive deionization process
… in a capacitive fashion to high surface-area electrodes such that the outgoing stream becomes devoid of the ions that were present in the incoming stream. Although the power efficiency of CDI is nearly an order-of-magnitude superior to the existing processes, it is plagued by the problem of …
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Capacity Fade Analysis and Model Based Optimization of Lithium-ion Batteries
… for the optimal design of next-generation porous electrodes for lithium-ion batteries, with spatially graded porosity distributions with improved energy efficiency and battery lifetime and: iii) optimized operating conditions of batteries for high energy and utilization efficiency, safer …
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Modeling of Electronic and Ionic Transport Resistances Within Lithium-Ion Battery Cathodes
… validated, which describes the performance of porous electrodes under low and high rates of discharge. This porous battery model can be used to provide researchers a better physical understanding relative to prior models of how cell morphology and materials affect performance due to improved …
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Capacitive deionization performance of bi-tortuous activated carbon electrodes coated with asymmetrically charged polyelectrolytes
… electrochemical desalination technology in which porous carbon electrodes are polarized to reversibly store ions from a brackish water feed in electrical double layers in the electrodes. CDI is an attractive alternative to commonly used brackish water desalination technologies like reverse osmosis …
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Characterization of redox active materials to enable electrochemical separations through faradaic deionization
… that limit cation intercalation within porous electrodes comprised of NiHCFe nanoparticles, conductive carbon additives and polymer binder are investigated. A combination of experimental characterization, particle-scale transport modeling, and porous electrode theory show that slow …
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