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Showing 1 to 20 of 259 for “"Intercalation"”.
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Intercalation properties of context-free languages
<p>Context-freedom of a language implies certain intercalation properties known as pumping or iteration lemmas. Although the question of a converse result for some of the properties has been studied, it is still not entirely clear how these properties are related, which are the stronger ones and …
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Shape morphing structures via intercalation compounds
… harnessing reversible volumetric change due to intercalation during charging and discharging. These actuators provide a relatively large strain, 2-3%, while requiring less than ten volts to operate with a cycle time on the order of one hundred seconds. This technology can be used in any moderate …
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Intercalation dynamics in lithium-ion batteries
… proposed by Singh, Ceder, and Bazant for the ion intercalation dynamics in a single crystal of rechargeable-battery electrode materials. It is based on the Cahn-Hilliard equation coupled to reaction rate laws as boundary conditions to handle the transfer of ions between the crystal and the …
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Lattice anharmonicity in alkali-graphite intercalation compounds
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-03T17:46:52Z No. of bitstreams: 1 1985_hardcastle.pdf: 3045662 bytes, checksum: 2aa3c0674c38dbfb86a2a1d97f93f80e (MD5)
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Lithium intercalation reactions with transition metal oxides
An investigation of several lithium transition metal oxide systems has been undertaken with the aim of synthesising an optimised LiM0₂ compound (M = Mn, Co or Co/Ni mixtures) for application as a cathode in rechargeab1e lithium batteries. Attention has been focused on systems which show promise for …
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Data-driven Modeling of Lithium Intercalation Materials
… and extracting quantitative models of lithium intercalation materials from experimental data. Built upon the theoretical foundation of the reaction kinetics, transport phenomenon, thermodynamics, and electrochemistry of lithium intercalation materials, the theory describes the single-particle …
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Electrochemical shock : mechanical degradation of ion-intercalation materials
The ion-intercalation materials used in high-energy batteries such as lithium-ion undergo large composition changes-which correlate to high storage capacity-but which also induce structural changes and stresses that can cause performance metrics such as power, achievable storage capacity, and life …
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Electrochemical and Transport processes in Ion Intercalation materials
… with the recent Nobel prize in chemistry, ion intercalation materials play an essential role in the state-of-the-art energy storage technologies, such as Li-ion batteries, as they are used everywhere around us; from the phones we use to the cars we drive. Intercalation-based energy storage …
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Degradation Mechanisms and Applications in Ion Intercalation Materials
Lithium ion batteries (LiBs) are a pivotal energy storage technology that are widely adopted for their high energy density and safety. From a macroscopic level, LiBs operate at a micrometer lengthscale, but consist of many active material nanoparticles which participate in reversible …
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Oxygen intercalation in electrochemically-doped La₂CuO₄₊[delta]
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1997.
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Deuterium Solid State NMR Studies of Pyridine Intercalation Compounds
A quadrupole echo deuterium NMR lineshape study on polycrystalline samples of perdeuterated pyridine and selectively deuterated d$\sb2$-pyridine intercalated into 2H-TaS$\sb2$ was performed between 280K and 393K. The powder pattern lineshapes above 333K show signs of motional narrowing. A short …
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Magnetic properties of transition metal dichloride - graphite intercalation compounds
… of four transition metal dichloridegraphite intercalation compounds (GIC's) have been studied by neutron scattering and static magnetization measurements. Because of the large spatial anisotropy introduced by intercalation, the compounds studied represent good approximations to magnetic …
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Investigation of non-intercalation electrode materials for next-generation batteries
… have been studied intensively as alternatives to intercalation materials as they can provide 2 to 5 times larger gravimetric capacities. However, there are many challenges facing the practical application of conversion electrodes. In this dissertation, the problems of conversion and alloying …
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Thermodynamics and kinetics of Mg intercalation for multivalent cathode applications
Energy storage, especially through electrochemical mechanisms such as batteries, is crucial for sustaining the ever-increasing energy needs of the future in a fossil-free manner. While the current industrial workhorse, lithium ion batteries, has shown tremendous improvements in energy and …
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First-principles investigation of Li intercalation kinetics in phospho-olivines
… on characterizing and understanding the Li intercalation mechanism in phospho-olivines, namely LiFePO₄ and Li(Fe,Mn)PO₄, using first-principles calculations. Currently Li-ion battery technology is critically relied upon for the operation of electrified vehicles, but further improvements …
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Structural studies of graphite intercalation compounds and ion implanted graphite
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1985.
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Studies into the ion exchange and intercalation properties of AlH2P3O10•2H2O
… performed into the ion exchange and intercalation properties of aluminium triphosphate, AlH\(_2\)P\(_3\)O\(_{10}\)•2H\(_2\)O (AlTP). Materials synthesised were characterised using a variety of techniques, including powder neutron and X-ray diffraction, Rietveld analysis, …
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Mathematical modeling of lithium-ion intercalation particles and their electrochemical dynamics
Lithium-ion battery is a family of rechargeable batteries with increasing importance that is closely related to everyone's daily life. However, despite its enormously wide applications in numerous areas, the mechanism of lithium-ion transport within the battery is still unclear, especially for …
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Effect of Design Parameters and Intercalation Induced Stresses in Lithium Ion Batteries
<p>Electrochemical power sources, especially lithium ion batteries have become major players in various industrial sectors, with applications ranging from low power/energy demands to high power/energy requirements. But there are some significant issues existing for lithium ion systems which include …
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