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 19 of 19 for “"Fast-charge"”.
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A low power high power supply rejection ratio bandgap reference for portable applications
… an efficient voltage-to-current converter and a fast-charge circuit for charging the external capacitor.
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A bidirectional battery-to-battery energy cycler for battery pack testing and validation
… salient features like high terminal voltage, fast charge/discharge capabilities, and energy density to size ratio. Batteries are designed for applications depending upon their requirements. Testing and validation of batteries before they are deployed for usage is an essential step in the …
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Photosynthetic antenna-reaction-center mimicry
… excitation energy to the reaction center where charge separated entities are formed via photoinduced electron transfer (PET). The synthesized artificial molecular systems are comprisedof porphyrin-fullerene, donor-acceptor entities due to their well studied photophysical properties which are …
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Excited State Dynamics and Energy Transfer Studies of Aromatic Molecules
… important for the efficiency of the energy and charge transfer events, which are the critical elements of light harvesting devices. Additionally non-radiative events can compete with the desired energy storage processes. A series of dendrimers composed of meta-conjugated phenylethynylene has …
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High power li-Ion battery performance: a mechanistic analysis of aging
… industrial and research LIB fields are emerging. Fast charging is gaining momentum in order to meet the demands of high power LIB systems. The ability of a LIB to perform fast charging depends on various factors, including cell active materials, and the design of a reliable fast charging protocol. …
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3D detectors for synchrotron applications
… spacing, resulting in a low depletion voltage, fast charge collection and low charge sharing. These detectors have a couple of promising applications. Their fast charge collection and low depletion voltage should make them very radiation-tolerant. So, they could be used for future particle …
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The electronic transport properties of undoped and doped arsenic triselenide
… d.c, conductivity, thermoelectric power and fast charge transient photoconductivity were made. In addition, an improved time of flight technique and a modulated steady state photocurrent experiment were developed.<br/><br/>Results obtained from undoped, vitreous, evaporated and sputtered …
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Impacto en la red eléctrica de diferentes estrategias de carga en los vehículos eléctricos
… esta tesis se hará un estudio de las siguientes: Fast charge: El VE se carga con la potencia de carga máxima, hasta que esté completamente cargado. Esta estrategia que otorga la autonomía para el usuario y minimiza el tiempo de uso de la estación de carga [13]. Mínimo costo de recarga y evitar la …
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Interfacial Tailoring of Lithium-ion Batteries by Atomic/Molecular Layer Deposition
… as high voltage (3.3~4.2 V) [1,2], low self-discharge (< 5~10 %/month) [3,4], wide operation temperature (-20~60 °C) [5,6], and fast charge/discharge rate [7,8]. However, LIBs deliver an energy density of 100-220 Wh/kg in practice to date, which is far from their theoretical ones, thus hindering …
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Supecapacitor-assisted Temperature Modification Apparatus (SCATMA) and Fast Supercapacitor Charger
… as well as a new power converter topology to fast charge a supercapacitor bank. Delayed delivery of hot water in domestic water heating systems wastes over 15 million cubic metres of treated water per annum in New Zealand. The patent pending supercapacitor assisted temperature modication …
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Magnetic Resonance Studies of a Sodium-Ion Battery Cathode: Experiment and Theory
… At present, the electrochemical performance—the charge/discharge rate, lifetime and capacity—of NIBs is not optimised for practical applications and generally limited by the cathode material. To address these performance problems, a deeper understanding of the evolution of the chemical and …
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Investigations on Organic Vertical Transistors and Defect Minimization in Hybrid Perovskites
… is device architecture design for achieving fast organic memory. The second project is targeting on achieving general observation of clean field effect operation in OHP transistor which is currently the major problem in the community. In the first project, we developed a new memory device …
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Counting nonequilibrium quasiparticles in a superconductor
… excitations in mesoscopic superconductors using charge detectors based on single-electron devices. In the first part of this thesis, we present background material on superconductivity and single-electron devices, and review the literature on excess nonequilibrium quasiparticles. We then describe …
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The thermodynamics, kinetics and modelling of fast-charging lithium-ion batteries featuring crystallographic shear niobium metal oxide anodes
… on global resources. We need batteries that charge faster and live longer, such that we can use less resources. Faster charge and longer life are currently limited by the negative electrode, typically graphite, because fast charging would push the potential into the regime of hazardous and …
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Design and Characterization of Electrospun Mats with Tailored Morphologies for Enhanced Active Layer Performance in Energy Conversion and Energy Storage Applications
… NMR shows that lithium diffusion is faster in PVDF samples. From coin cell discharge experiments, PEO is believed to interact strongly with Li+ ions, inhibiting them from diffusing rapidly during fast charge/discharge rates. However, PEO/PETA fiber electrolytes show nearly 100% …
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Graphene-based Hybrid Electrodes for High-Performance Supercapacitors
… this solid electrolyte interface (SEI) is where charge storage occurs, and the electrochemical reactions occur. Hence, controlling the chemistry and structure of the electrodes to enable a high surface area and fast charge transfer with the electrolyte is vital for designing better SC systems. …
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Enhancing the photoelectrochemical water splitting characteristics of titanium and tungsten oxide based materials via doping and sensitization
… that have strong visible light absorption, fast charge separation, and lower charge recombination rate. In the present study, PEC characteristics of various semiconducting photoelectrodes such as TiO2, WO3 and CuWO4 were investigated. Due to the inherent wide gap, such metal oxides absorb …
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Donor-Acceptor Block Copolymers in Organic Electronics - Spectroscopy, Charge Transport, Morphology and Device Application
… interactions of the PBI moieties favour not only charge transport, but also affect the optical properties, due to the electronic coupling of the transition dipole moments. Thus, optical spectroscopy such as absorption and fluorescence spectroscopy give access to information about the …
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Calendar, Cycling, and Fast charging aging in Li-ion batteries
L'abstract è presente nell'allegato / the abstract is in the attachment