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 5 of 5 for “"reaction heterogeneity"”.
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The Impacts of Particle Size Distribution and Electrode Structuring on NMC Cathode Performance
… not uniform in shape and size distribution. This heterogeneity results in heterogeneous electrode structures, leading to uneven reactions across the battery electrodes. Moreover, mass transport limitations at high charging rates can further exacerbate the reaction heterogeneity. This non-uniform …
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Packed bed reactors at the pellet scale: magnetic resonance studies of hydrodynamics, mass transport and reaction
… industries to facilitate heterogeneous catalytic reactions. Despite the widespread use of packed bed reactors in industry, the flow, transport, and reaction phenomena occurring at the scale of individual catalyst pellets is poorly understood due to a lack of experimental techniques capable of …
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Physics-based and data-driven modeling of multi-active material electrode batteries
… frameworks capable of accounting for parallel reactions and diffusion pathways, phase transformations, multi-scale heterogeneities, and interactions between individual active materials. However, existing open-source battery simulation frameworks based on porous electrode theory are tailored for …
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Multinuclear NMR Investigations of Local Structure, Distortions and Redox Mechanisms in Layered Lithium Ion Battery Cathode Materials
… this may suggest a kinetic origin for the reaction heterogeneity and poor first cycle coulombic efficiency observed in NCA. Finally, the redox mechanisms and electronic structure of NCA are investigated. ^{59}Co NMR reveals a population of Co^{3+} is present at the end of charge, …
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Understanding Electrode-Electrolyte Interfaces with Metal Dissolution and Redeposition Chemistry
… surface chemistry and tuning the electrochemical reactions at the solid-liquid interface by selectively changing the electrolyte composition and electrochemical cycling conditions. Amorphous TiO2 surface layers can be formed on WO3 electrodes by adding exotic Ti cations to the electrolyte, and …