Download or read book Experimental Characterization of Electrodes and Multi Scale Modeling of Swelling Induced Stresses in Lithium ion Batteries written by Priyank Gupta and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book On Mechanical Characterization and Multi scale Modeling of Lithium ion Batteries written by Priyank Gupta and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Lithium Ion Battery Electrodes written by Nicholas William Brady and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Further investigation of the LiV3O8 electrode is undertaken by coupling the crystal scale model to electrode scale phenomena. Characterization of the LiV3O8 electrode by operando EDXRD experiments provides a unique and independent set of observations that validate the previously estimated physical constants for the phase change saturation concentration and phase change reaction rate constant; they are both found to be consistent with their previous estimates. Finally, it is observed that anodic physical phenomena are important during delithiation of the cathode because the kinetics at the anode become mass-transfer limited. Finally, it is illustrated that coupling physical models to data science and algorithmic computing is an effective method to accelerate model development and quantitatively guide the design of experiments.

Download or read book Advanced Characterization and Modeling of Next Generation Lithium Ion Electrodes and Interfaces written by Thomas Andrew Wynn and published by . This book was released on 2020 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lithium ion batteries have proven to be a paradigm shifting technology, enabling high energy density storage to power the handheld device and electric automotive revolutions. However relatively slow progress toward increased energy and power density has been made since the inception of the first functional lithium ion battery. Materials under consideration for next generation lithium ion batteries include anionic-redox-active cathodes, solid state electrolytes, and lithium metal anodes. Li-rich cathodes harness anionic redox, showing increased first charge capacity well beyond the redox capacity of traditional transition metal oxides, though suffer from severe capacity and voltage fade after the first cycle. This is in part attributed to oxygen evolution, driving surface reconstruction. Solid-state electrolytes (SSEs) offer the potential for safer devices, serving as physical barriers for dendrite penetration, while hoping to enable the lithium metal anode. The lithium metal naturally exhibits the highest volumetric energy density of all anode materials. Here, we employ simulation and advanced characterization methodologies to understand the fundamental properties of a variety of next generation lithium ion battery materials and devices leading to their successes or failures. Using density functional theory, the effect of cationic substitution on the propensity for oxygen evolution was explored. Improvement in Li-rich cathode performance is predicted and demonstrated through doping of 4d transition metal Mo. Next, lithium phosphorus oxynitride (LiPON), an SSE utilized in thin film batteries, was explored. LiPON has proven stable cycling against lithium metal anodes, though its stability is poorly understood. RF sputtered thin films of LiPON are examined via spectroscopic computational methods and nuclear magnetic resonance to reveal its atomic structure, ultimately responsible for its success as a thin film solid electrolyte. A new perspective on LiPON is presented, emphasizing its glassy nature and lack of long-range connectivity. Progress toward in situ methodologies for solid-state interfaces is described, and a protocol for FIB-produced nanobatteries is developed. Cryogenic methodologies are applied to a PEO/NCA composite electrode. Cryogenic focused ion beam was shown to preserve polymer structure and morphology, enabling accurate morphological quantification and preserving the crystallinity, as observed via TEM. Last, development of in situ solid-state interface characterization is discussed.

Download or read book Electrode Materials for Rechargeable Lithium Batteries written by Wenbo Liu and published by Mdpi AG. This book was released on 2023-09-06 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reprint, which is titled "Electrode Materials for Rechargeable Lithium Batteries", focuses on various novel high-performance anode and cathode materials used to develop rechargeable lithium batteries. This reprint's overall focus will range from material design and fabrication technology to scientific understanding and potential/engineering applications. Electrode materials used in advanced lithium-ion batteries, lithium metal batteries, lithium sulfur batteries, and lithium oxygen/air batteries are of particular interest. Special attention is given to the fabrication and synthesis of electrode materials, lithium dendrite growth and inhibition, polysulfide transformation, novel electrode structure design, electrode material failure, lithium storage mechanisms, electrochemical performance optimization, safety assessment and evaluation, advanced characterization techniques, multi-scale computational modeling, etc.

Download or read book Modeling Diffusion Induced Stresses for Lithium Ion Battery Materials written by Cheng-Kai Chiu Huang and published by . This book was released on 2014 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Continuum Level Physics based Model on Understanding and Optimizing the Lithium Transport in High Energy Density LIB LMB Electrodes written by Zeyu Hui and published by . This book was released on 2022 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: As an efficient means of energy storage, rechargeable batteries, especially the lithium-ion batteries (LIBs) have been a vital component in solving the upcoming energy crisis and environmental problems. Recently, the development of electric vehicle market puts new requirement on the next generation LIBs, including superior energy density, safety and cycling stability, etc. Compared with experimental investigation, Physics-based models provide a surrogate method to not only tackle the underlying physics of the complex battery system, but also optimize the design of battery systems. In this thesis, I will show how I use the physics-based continuum model and cooperate with some experimental methods to understand the lithium transport phenomena inside the multiscale battery electrode systems, based on which the models are then applied to guide the experimental optimization of battery electrode design and to quantitively understand the degradation of high-performance electrodes. The thesis is divided into three parts.

Download or read book Stresses at Electrode Electrolyte Interface in Lithium ion Batteries Via Multiphysics Modeling written by Sangwook Kim and published by . This book was released on 2015 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Learning the Electrochemistry of Degradation and Safety in Graphite Porous Electrodes for Lithium ion Batteries written by Supratim Das and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lithium-ion batteries have become the centerpiece of portable technology and electric transportation, as well as for grid stabilization for intermittent renewable sources. The varied applications involve varying requirements for safety, lifetime, and energy/power density. To optimally design these systems for each application, researchers have a very large design space. This requires extensive and costly experimentation or computationally heavy modeling. Specifically for designing batteries with better lifetime and long-term capacity retention, relying on just experiments can take between weeks to months and thousands of cells to get any robust insights for process improvement. Data-driven and physics based modeling, when done rigorously, can help inform experimentation, reducing time and cost requirements. However, modeling battery degradation is challenging as it not only is hard to visualize in-operando, but also affects cell performance at multiple scales - from single particle to porous electrode to the battery pack. Insights obtained from experimentation on a given scale to inform modeling, often performs poorly when it comes to prediction at other scales, limiting applicability. This thesis is a small part of a collaboration between MIT, Stanford, Purdue and Toyota Research Institute to develop data-driven models for predicting battery performance and degradation, called the D3BATT: Data-Driven Design of Lithium-ion Batteries. We adopt a simultaneous 'bottom-up' (first principles) and 'top-down' (statistical analyses of experiments) approach to inform theory formulation at multiple scales. This thesis addresses the idea behind a multiscale 'bottom-up' approach to understanding battery degradation: First, we use experiments designed on simple systems to study the electrochemistry of key graphite degradation mechanisms such as solid-electrolyte interphase (SEI) growth and lithium plating at the single particle scale. This gives us robust kinetic and thermodynamic parameters that are invariant with scale. Second, we extend the single particle theory to the porous electrode scale to capture the effect of multi-particle interactions and macroscopic electrode and electrolyte properties. This is done using the Multiphase Porous Electrode Theory (MPET) software, developed in the Bazant Group at MIT. Third, by simulating various cycling protocols (such as slow and fast charging, full depth-of-discharge vs. shallow formation cycling and open-circuit storage), we can compare the predictions with that of data-driven models obtained from statistical analyses of cell data. This informs the porous electrode model of the key mechanisms relevant at the cell scale, and gives a reliable estimate of electrode-scale parameters that could not have been informed from single-particle models. As an example, we apply the informed porous electrode degradation model to battery formation cycling, and explain what makes a 'good' formation cycling protocol. Model improvement is an ongoing effort in the research group, as new experimental data come to light. This work can be applied to a multitude of cycling scenarios and battery chemistries to assist experimental design.

Download or read book The Variational Approach to Fracture written by Blaise Bourdin and published by Springer Science & Business Media. This book was released on 2008-04-19 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting original results from both theoretical and numerical viewpoints, this text offers a detailed discussion of the variational approach to brittle fracture. This approach views crack growth as the result of a competition between bulk and surface energy, treating crack evolution from its initiation all the way to the failure of a sample. The authors model crack initiation, crack path, and crack extension for arbitrary geometries and loads.

Download or read book Mechanical Behavior of Lithium ion Battery Electrodes Experimental and Statistical Finite Element Analyses written by İbrahim Buğra Üçel and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis and Characterization of High Performance Electrode Materials for Lithium Ion Batteries written by Jian Hong and published by . This book was released on 2009 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scaling Relations for Intercalation Induced Damage in Electrodes written by and published by . This book was released on 2016 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanical degradation, owing to intercalation induced stress and microcrack formation, is a key contributor to the electrode performance decay in lithium-ion batteries (LIBs). The stress generation and formation of microcracks are caused by the solid state diffusion of lithium in the active particles. Here in this work, scaling relations are constructed for diffusion induced damage in intercalation electrodes based on an extensive set of numerical experiments with a particle-level description of microcrack formation under disparate operating and cycling conditions, such as temperature, particle size, C-rate, and drive cycle. The microcrack formation and evolution in active particles is simulated based on a stochastic methodology. A reduced order scaling law is constructed based on an extensive set of data from the numerical experiments. The scaling relations include combinatorial constructs of concentration gradient, cumulative strain energy, and microcrack formation. Lastly, the reduced order relations are further employed to study the influence of mechanical degradation on cell performance and validated against the high order model for the case of damage evolution during variable current vehicle drive cycle profiles.

Download or read book Electrochemical Modeling in the Context of Production of Lithium Based Batteries written by Vincent Laue and published by . This book was released on 2021-01-29 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses the two most prominent shortcomings of a commonly used physics-based electrochemical model of a lithium-ion battery, namely ambiguous identifiability, and coarse representation of the electrode microstructure. The first shortcoming is tackled with an enhanced parametrization routine and the second with surrogate models, derived from a full-3D microstructure model. All models and results are related to the production of lithium-ion battery cells.

Download or read book Synthesis and Characterization of Novel Electrode Materials for Lithium Ion Batteries written by Ruigang Zhang and published by . This book was released on 2011 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Multi faceted Approach Towards Improving the Performance of Silicon Electrodes for Next generation Lithium ion Batteries written by Michael Melnyk and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Although lithium-ion battery technology has been the catalyst in enabling modern electric vehicle, mobile device, and large-scale energy storage technology, the increasing power demands by end-users has motivated research in developing the next-generation of lithium-ion batteries. This next generation of batteries will need to achieve higher energy and power densities, while remaining chemically stable. Silicon-based active material has been proposed as a solution in achieving superior battery performance, as it can offer a lithium storage capacity (4200 mAh/g) tenfold higher than the carbonaceous electrodes employed in commercial Li-ion cells, while also offering superior safety characteristics. Unfortunately, the higher lithium storage capacity translates into an immense volume expansion (300 - 400%) upon lithiation, and thus the mechanical integrity and electrochemical performance of the electrodes are very unstable. Within the past decade, the performance of Si-based electrodes has been greatly improved as active material morphologies, polymer binders, electrolyte additives, and theoretical models have provided solutions in alleviating the stresses and strains generated during Si lithiation/delithiation. A multi-faceted solution pathway is enacted in this research to develop a Si-based electrode that can achieve cycling performance relevant to industrial application, while also offering insight on the influence of several aspects of the Si-based electrode design on cycling performance. From this investigation, a Si-based electrode has been developed with carbon-coated silicon monoxide active material and polyacrylic acid polymer binder, both of which offer several complimentary attributes that enable a moderately stable cycling performance at high active mass loading while offering a gravimetric and areal lithium capacity magnitude relevant to industrial applications. Although much work lies ahead in further improving the capacity retention of the Si-based electrodes reported in this thesis, this work presents an economical platform for future work on the topic.

Download or read book Synthesis and Characterization of Lini0 6mn0 35co0 05o2 and Li2fesio4 C As Electrodes for Rechargeable Lithium Ion Battery written by Pengda Hong and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Synthesis and characterization of LiNi0.6Mn0.35Co0.05O2 and Li2FeSiO4/C as electrodes for rechargeable lithium ion battery" by Pengda, Hong, 洪鹏达, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: The rechargeable lithium ion batteries (LIB) are playing increasingly important roles in powering portal commercial electronic devices. They are also the potential power sources of electric mobile vehicles. The first kind of the cathode materials, LiXCoO2, was commercialized by Sony Company in 1980s, and it is still widely used today in LIB. However, the high cost of cobalt source, its environmental unfriendliness and the safety issue of LiXCoO2 have hindered its widespread usage today. Searching for alternative cathode materials with low cost of the precursors, being environmentally benign and more stable in usage has become a hot topic in LIB research and development. In the first part of this study, lithium nickel manganese cobalt oxide (LiNi0.6Mn0.35Co0.05O2) is studied as the electrode. The materials are synthesized at high temperatures by solid state reaction method. The effect of synthesis temperature on the electrochemical performance is investigated, where characterizations by, for example, X-ray diffraction (XRD) and scanning electron microscopy (SEM), for particle size distribution, specific surface area, and charge-discharge property, are done over samples prepared at different conditions for comparison. The electrochemical tests of the rechargeable Li ion batteries using LiNi0.6Mn0.35Co0.05 cathode prepared at optimum conditions are carried out in various voltage ranges, at different discharge rates and at high temperature. In another set of experiments, the material is adopted as anode with lithium foil as the cathode, and its capacitance is tested. In the second part of this study, the iron based cathode material is investigated. Lithium iron orthosilicate with carbon coating is synthesized at 700℃ by solid state reaction, which is assisted by high energy ball milling. Characterizations are done for discharge capacities of the samples with different carbon weight ratio coatings. DOI: 10.5353/th_b4715029 Subjects: Lithium ion batteries Cathodes Lithium compounds - Synthesis Cobalt compounds - Synthesis Manganese compounds - Synthesis Silicon compounds - Synthesis Iron compounds - Synthesis