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Showing 1 to 20 of 35 for “"Lithium ions"”.
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The Calculation of The Scattering of Lithium Ions From Nitrogen Molecules
Made available in DSpace on 2014-12-13T20:10:17Z (GMT). No. of bitstreams: 1 7804113.pdf: 5838629 bytes, checksum: 902eedb33b562f1d0409aa7a02c93046 (MD5) Previous issue date: 1977
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Measurement of Time Dilation by Laser Spectroscopy on Fast Stored Lithium Ions
… Arbeit werden Frequenzmessungen an schnellen Lithium Ionen als Test der Zeitdilatation vorgestellt. Die Messungen sind am Speicherring TSR am Max-Planck-Institut für Kernphysik durchgeführt worden. Die Übergangsfrequenz eines Zwei-Niveau-Systems im Lithium Ion wird bestimmt, indem eine …
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Designing materials for energy storage with high power and energy density : LiFePO₄ cathode material
… a lot of attention as a cathode material in lithium rechargeable batteries because its structural and thermal stability, its inexpensive cost, and environmental friendliness meet the requirements of power sources for electric vehicles, except high power capability. Strategies to increase the …
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Synthesis and Electrochemical Performance of Lithium Lanthanum Titanate Solid-state Electrolyte
… storage devices have become more prominent. Lithium-ion rechargeable batteries have been one of the most popular vital topics in this area. For developing the next generation lithium-ion batteries with higher energy capacity and safety, solid-state electrolytes play an important role in …
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A mass measurement of the short-lived halo nucleus ¹¹Li with the TITAN Penning trap spectrometer
… which have been successfully used to inject ions into the RFQ. Cooling of lithium ions with high DC efficiencies of 20%, in helium, and 40%, in hydrogen, are shown. Extraction of extremely short ion bunches, 30 ns FWHM, is also demonstrated. Storage times for stable lithium ions in helium and …
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Preparation, Characterization and Performance Study of Modified Titanium Dioxide Nanocrystals for the Lithium-Ion Battery
The lithium-ion battery is one of the most widely used rechargeable batteries in today’s life. As an energy storage device, it can convert the stored chemical energy into electrical energy when it is being used. Titanium dioxide nanocrystals are well-known for the photocatalytic ability. However, …
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Physics-Based Li-Svo Cathode Model
… with a Redlich-Kister equation. By assuming that lithium ions intercalate only through the ends of the cuboid SVO particles, the model is able to predict accurately the discharge profile of experimental cathode half cell coin cells.</p>
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New metastable cathode materials for lithium-ion batteries
… discovery and study of new cathode materials for lithium-ion batteries. To obtain new materials, a well-known strategy based on ion-exchanging alkali metals within stable crystalline frameworks was used. Ion-exchange procedures between sodium and lithium ions were performed on known sodiated …
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Modeling effects of microstructure for electrically active materials
… is on deriving equilibrium and kinetic equations for electrically active materials, particularly for rechargeable lithium-ion batteries and piezoelectric and electrostrictive microstructures. In both cases, the finite element method is applied to account for the effects of microstructure. …
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Study of the Interplay Among Non -Covalent Interactions in Structural Determination of Gas Phase Cluster Ions
The cesium and lithium ions were also investigated with benzene and water. Unimolecular dissociation rates were used to determine the most labile species and therefore a possible structural change. In the vibrational spectra of Li+(Benzene)n(Water)1--4 clusters, pi-H bonding bands dominated, while …
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First principles investigation of the thermodynamic and kinetic properties of lithium transition metal oxides
… an important cathode material for rechargeable lithium batteries. In a lithium battery, the lithium concentration x in Lix CoO2 can be varied between O and 1. Such concentration variations result in important changes of the electronic properties, the relative stability of different forms of …
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Ionically-Coupled Non-Linear Variable Resistors for Neuromorphic Applications
… is based on the action of ion intercalation of lithium ions into PEDOT:PSS active layers causing resistance to increase, similar to a memristor. A simple model is developed and implemented in SPICE to predict device behaviour, and a fabrication technique to rapidly create such a device by hand …
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Li-ion battery electrode state of charge and degradation monitoring using battery casing as the reference electrode
Lithium-ion battery (LIB) internal state such as state of charge (SOC), electrode capacity, and available lithium-ion monitoring is helpful for effective battery degradation monitoring. Monitoring these internal parameters is challenging due to the weak observability of the electrode parameters and …
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Interactions of single-crystal lithium niobate surfaces with ultra-violet laser radiation
… of ultraviolet laser light on single crystal lithium niobate surfaces with a focus on useful functionalisation. The investigations split naturally into three areas: effects on hydrophilicity by low intensity laser irradiation, effects on ferroelectric domain inversion by focussed laser …
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Numerical investigation of ion transport mechanisms in electrochemical energy storage devices: Similarity correlation and exergy destruction analysis
… of electrochemical energy storage solutions due to their scalability and ability to handle intermittency. In this thesis, the ion transport mechanisms are studied by modeling redox flow batteries (RFBs) and intercalation-based Li-ion batteries. Redox flow batteries are an emerging …
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High accuracy computational methods for lithium ion battery materials
… ongoing research to improve the performance of Lithium-ion batteries has required the study of increasingly complex physical and chemical phenomena. In this context, the use of computational tools to quantitatively assess these phenomena has proven crucial for advancing the Lithium-ion battery …
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Semi-analytical model of ionization oscillations in Hall thrusters
… oscillation within Hall thrusters. These oscillations have been present and accepted within Hall thrusters for decades, but recent interest in the oscillation has occurred partly due to a possible connection between wall erosion and the oscillations. The first part of this thesis details a steady …
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The Incorporation of Graphene to Lithium Cobalt Oxide as a Cathode to Improve the Performance of Lithium Ion Batteries
… was to investigate the cathode performance of lithium cobalt oxide (LiCoO2) incorporated with graphene powder in lithium ion batteries (LIBs). Graphene powder was incorporated into cathode materials to enhance the performance of LIBs. The other objective was to impede the construction of a …
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In situ investigation of electrochemical surface stress development in rechargeable batteries
… are operated by an intercalation mechanism. Lithium ions shuttle reversibly between the cathode and anode during charging and discharging. Typically, intercalation cathodes deliver around one hundred to two hundred in specific capacity. The operating voltage is around three to five vs. …
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In-situ and ex-situ observations of lithium de-intercalation from LiCoO₂ : atomic force microscopy and transmission electron microscopy studies
Lithium cobalt dioxide is the most commonly used material for positive electrodes in lithium rechargeable batteries. During lithium de-intercalation from this material, ... undergoes a number of phase transitions, which have been studied by bulk techniques and first-principles calculations. The …
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