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 192 for “"cathodes"”.
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Composite cathodes for lithium rechargeable batteries
The utility of incorporating continuous, nanoscale vanadium oxide phases within preferred domains of self-organizing copolymers was investigated towards the fabrication of composite, nanoarchitectured electrode materials for solid-state rechargeable batteries. In situ growth of cathodic phases …
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Investigation and Improvement of SofC Composite Cathodes
… and long term stability of SOFC composite cathodes prepared by infiltration methods. The majority of the work that follows aims to improve the understanding of the processes contributing to cathode deactivation and to propose strategies to lessen the extent of this deactivation. Through …
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Polyanionizing rocksalt cathodes for lithium-ion batteries
Rocksalt-type and olivine polyanion-type cathodes are the two most dominant families of practical lithium-ion battery (LIB) cathodes. Rocksalt-type cathodes, including layered LiCoO₂, [chemical formula] (NCM), spinel LiMn₂O₄ and [chemical formula], and the later-developed disordered rocksalt …
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Cation-disordered oxides for rechargeable lithium battery cathodes
The demands for high-energy density cathode materials for rechargeable lithium batteries are ever increasing. This is because such cathode materials will enable smaller and lighter rechargeable lithium batteries for complex applications such as in electric vehicles or in grid energy storage. Nearly …
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Microthrusters based on the T5 and T6 hollow cathodes
… T5 cathode and in doing so, have taken hollow cathodes a significant step forwards as a viable and competitive propulsion technology.<br/><br/>An analysis of the thrust production is made, and on this basis conclusions are drawn on the existence of electrothermal, electromagnetic and …
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Understanding the intrinsic electrochemistry of ni-rich layered cathodes
… employing layered transition metal oxide cathodes are one of the most technologically important energy storage technologies. However, current Li-ion batteries are unable to access their full theoretical capacity and suffer from performance limiting degradation over time partially …
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Multi-redox active polyanionic cathodes for alkali-ion batteries
… polyanionic materials are examined as candidate cathodes for alkali-ion batteries: Li-containing carbonophosphates for Li-ion batteries and Na-containing fluorophosphates for Na-ion batteries. High-throughput ab initio calculations have previously identified carbonophosphates as a new class of …
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Multifunctioning Electrocatalytic Cathodes for Lithium-Air and Lithium-Oxygen Batteries
Despite its historical success, currently, the limited energy density in Li-ion batteries restricts the electrifying of transportation into small and medium-scale vehicles. On the contrary, Li- O2 batteries (LOBs) and Li-air batteries (LABs) with larger theoretical energy density are capable of …
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Doped LiFePO₄ cathodes for high power density lithium ion batteries
… recently as a promising storage compound for cathodes in lithium ion batteries. It has an energy density similar to that of LiCoO 2, the current industry standard for cathode materials in lithium ion batteries, but with a lower raw materials cost and an increased level of safety. An inherent …
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Electrical studies on new generations of oxide cathodes for CRT applications.
… and conductivity characteristics of oxide cathodes depend largely on the activation process. In this thesis the electrical properties of these new types of oxide cathodes, supplied by LG Philips Displays, have been investigated in relation to the different activation processes. Scanning …
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High-nickel layered oxide cathodes for high-performance lithium-ion batteries
… have been devoted to exploring advanced cathodes for high-performance LIBs. High-nickel layered oxides LiNi [subscript x] M [subscript 1-x] O₂ (x ≥ 0.6, M = Co, Mn, etc.) are one of the most promising candidates and are being extensively pursued. Unfortunately, the practical applicability …
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Aerosol Synthesis of Layered Oxide Cathodes Materials for Lithium-ion Batteries
… shift to electric vehicles. The importance of cathodes in shaping battery performance becomes evident when considering the often higher specific capacity exhibited by anode materials. Enhancing cathode materials and improving their electrochemical performance can be achieved through the …
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First principles investigation and design of fluorophosphate sodium-ion battery cathodes
… improve the capacity of current fluorophosphate cathodes by 37%.
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Electrochemical kinetics of thin film vanadium pentoxide cathodes for lithium batteries
… relations of thin film vanadium pentoxide cathodes used in lithium batteries. Variations in microstructures were achieved via sputtering and anneal treatments, resulting in films with different morphologies, grain size distributions, and orientations. Key findings included (1) grain size …
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Stability of lithium aluminum manganese oxide cathodes for rechargeable lithium batteries
Lithium manganese oxides have attracted wide attention as low-cost, nontoxic intercalation cathode materials for rechargeable lithium batteries. In this work, the stability of these compounds during synthesis and in use has been studied in several respects. (1) Phase stability of LiMnO2 polymorphs …
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Modeling of Electronic and Ionic Transport Resistances Within Lithium-Ion Battery Cathodes
… for relatively highly loaded lithium-ion cathodes at high discharge rates. Lithium cobalt and ruthenium oxides were tested and modeled individually and together in mixed-oxide cathodes to understand how the superior material properties relative to each other can work together to reduce …
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Base material electrocatalysts for oxygen cathodes in low temperature acid fuel cells
This thesis investigated the potential use of base material electrocatalysts for the oxygen cathode of a low-temperature acid fuel cell. Pt-based oxygen reduction electrocatalysts have so far been the only materials meeting the requirements of electrocatalytic activity, stability in the acidic …
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