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 30 for “"Lithium battery"”.
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Microstructural modeling of lithium battery electrodes
The transport of charged species in lithium ion batteries was studied from a microstructural point of view. Electron transport was analyzed using percolation theory and comparison with other conductor-insulator composites. An in situ filter pressing apparatus was designed and constructed in order …
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Cation-disordered oxides for rechargeable lithium battery cathodes
… 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 all high-energy …
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First Principles Investigations of Solid-Solid Interfaces in Lithium Battery Materials
… interface geometries of several solid state battery materials including Li metal, Li$_3$PO$_4$, Li$_3$PS$_4$, Li$_2$O, and Li$_2$S. This formalism, together with partial density of states analysis, allows me to characterize the extent, stability, and transport properties of these interfaces. …
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Synthesis and characterization of lithium-manganese-oxide electrodes for lithium battery applications
… rechargeable batteries, is increasing. Lithium batteries have several advantages over other competitive systems. Coupled with the inexpensive and environmentally friendly manganese dioxide, Li/MnO₂ batteries are being used extensively for powering a range of devices, but particular …
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Electrochemical conversion of a fluorinated greenhouse gas using a lithium battery configuration
… non-aqueous electrochemical platform with metal lithium (Li) as the anode and carbon as the cathode has been developed to convert the most potent greenhouse gas, sulfur hexafluoride (SF 6), into benign solids Li2S and LiF under room temperature conditions at an electrode - electrolyte interface. …
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Synthesis and Characterization of Polymer Composite Materials For Lithium Battery Cathodes and Capacitors
… of polymer composite materials used in lithium primary batteries and capacitors. The objective of the first part of the dissertation is to develop cathode materials based on silver vanadium oxide (SVO) coated with polypyrrole (PPy) having lower particle-to-particle resistance, lower …
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A first principles investigation of transitional metal doping in lithium battery cathode materials
… properties as well as the phase diagrams of lithium transition-metal oxides for lithium battery cathode materials was investigated. The effect of doping on the phase separation tendencies of layered transition-metal oxides was examined and it was found that for normal processing temperatures, …
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In-situ investigation of lithium dendrite growth and its interactions with a polymer separator in a lithium metal cell
Lithium dendrites are metallic structures that initiate and grow inside a lithium battery duringcharging. Lithium dendrite growth can negatively affect battery cycle life and safety. Observing the dendrite growth process and revealing its interaction with other components is necessary to improve …
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A wireless sensor network for smart roadbeds and intelligent transportation systems
… time-averaged current of 17 tA from an internal lithium battery, allowing it to operate in the roadbed for at least 10 years without maintenance. The nodes cost well under $30 to manufacture, and can be installed without running wires under the road, facilitating wide deployment. Unlike many …
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Electrochemical to mechanical energy conversion
Electrode materials for rechargeable lithium ion batteries are well-known to undergo significant dimensional changes during lithium-ion insertion and extraction. In the battery community, this has often been looked upon negatively as a degradation mechanism. However, the crystallographic strains …
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Electrochemical lithiation and delithiation for control of magnetic properties of nanoscale transition metal oxides
… Li+, as occurs during the discharge cycle of a lithium battery. This can lead to the change in valence and locations of the metal cations within the structure therefore a change in magnetic moment. Fey's and CrO2 are of considerable interest, primarily because they demonstrate room-temperature …
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Mixed (ion and electron) conducting polymers, with applications in batteries
… were tested as electrolyte/separators in lithium ion battery cells: the electrochemically treated film was found to be an effective separator between a 3D LiFePO4 positive electrode and a liquid lithium amalgam negative, and the chemically prepared materials showed a capacity of around 150 …
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Modeling, Designing, Building, and Testing a Microtubular Fuel Cell Stack Power Supply System for Micro Air Vehicle (MAVs)
… Innovations, Inc, in an effort to replace the lithium battery technology currently powering these devices. Investigation of planar proton exchange membrane (PEM) and direct methanol (DM) fuel cells has shown that these sources of power are viable alternatives to batteries for electronics, …
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Printable lithium batteries
Printable lithium iron phosphate (LiFePO4) cathodes and porous aerogel / polymer separators have been designed, constructed, and tested. The cathodes consist of LiFePO4, PVDF binder, and conductive carbon which was developed for robocast deposition (printing) onto carbon coated aluminum substrates …
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Design And Characterization Of An Embedded Amperometric Analyzer For Field-Portable Electrochemical Applications
… IC chips and powered by a single 3V lithium coin cell battery, the potentiostat circuitry inside the amperometric analyzer is designed to meet potential control and current detection requirements for most existing electrochemical sensors. Featured with sub-picoampere sensitive, wide …
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Lithium-based inorganic-organic framework materials
This dissertation describes research into lithium-based inorganic-organic frameworks, which has led to an increased understanding of the structural diversity and properties of these materials. The crystal structures of 11 new forms of lithium tartrate, based on chiral, racemic and meso forms of the …
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Fundamental understanding and design principles of oxide/metal surfaces for lithium storage
Lithium-battery technologies have promising potentials to enable efficient energy distribution, sustainable transportation systems, and the widespread of renewable energy. One of the most critical challenges that limits their further advances is the limited ability to design efficient interfacial …
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Analytical and numerical studies on mismatch strain related problems
… of nanotube and nanorod silicon anodes in lithium batteries and modified failure criterion for earthquake distribution along the earth depth. The first chapter discusses analytical and experimental results of self-assembling of thin films made from Polydimethysiloxane (PDMS)/SU-8 mixture. …
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Structure and properties of the interdiffused phase between lithiated silicon and copper current collector
… material for next generation high performance lithium ion batteries due to its order of magnitude higher charge carrying capacity compared to conventional graphite electrodes. The main obstacle of using Si electrodes in commercial lithium batteries is the massive volume expansion of the Si …
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Techno-Economic Analysis of Microgrids with Distributed Energy Resources in Rural Limpopo Province, South Africa
… (250 W, 375 W, and 500 W) with a 48V, 14.4 kWh lithium battery were tested, including PV/H2/Grid and PV/BES/H2/Grid setups. Microgrid optimisation results without hydrogen production show that the PV/Grid configuration is the most cost-effective option across all areas. For Ga-Masekwa, the LCOE …
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