Synthesis, Characterization, and Electrochemical Investigation of Layered Oxide Materials for Lithium Ion Batteries PDF Download
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Author: Donglin Han
Publisher:
ISBN:
Category :
Languages : en
Pages : 316
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Author: Donglin Han
Publisher:
ISBN:
Category :
Languages : en
Pages : 316
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Author: Brandon Joseph Kelly
Publisher:
ISBN:
Category : Cathodes
Languages : en
Pages : 236
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Author: Adam Blickley
Publisher:
ISBN:
Category : Energy storage
Languages : en
Pages : 144
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Book Description
Energy storage devices are quickly becoming a major requirement for human society, especially with the advancement of renewable energy and the rise of electric cars. However, current energy storage technologies can be dangerous, environmentally unfriendly, and expensive. Li-ion batteries, the most common rechargeable energy storage devices used commercially, utilize flammable electrolytes and in some cases toxic electrode materials. In order to overcome these drawbacks, new rechargeable energy storage devices are being investigated. One such technology that can address many of these issues is an aqueous-based energy storage device. These energy storage systems use water as the electrolyte solvent rather than expensive, environmentally hazardous, and flammable organic compounds. Aqueous energy storage devices tend to exhibit pseudocapacitance, and because of this, are often called "pseudocapacitors." Pseudocapacitance is a form of energy storage behavior that may exhibit both surface or near-surface reactions as well as some form of intercalation mechanism. Unlike typical battery intercalation reactions, pseudocapacitive storage is not limited by the diffusion of intercalating species. The focus of this thesis research is on the effect of structure and composition of layered transition metal oxide electrodes on their intercalation-based pseudocapacitive properties in aqueous systems Chemically preintercalated vanadium oxide (Îþ-MxV2O5, M = Li, Na, K, Mg, and Ca), which has been previously studied in non-aqueous Li-, Na-, and K-ion batteries, was investigated for its aqueous pseudocapacitive capabilities. First, the effect of post synthesis treatments on the initial capacitance and capacitance retention of Îþ-NaxV2O5 samples was investigated in order to identify the treatment combination leading to the highest performance. It was found that Îþ-NaxV2O5 samples that were aged and hydrothermally treated demonstrated the highest initial capacitance values of 230 F/g while samples that were aged and vacuum annealed exhibited the best capacitance retentions (68% after 50 cycles). The aged and hydrothermally treated and the aged and annealed post-synthesis treatment combinations were used on all five preintercalated Îþ-MxV2O5, materials (M = Li, Na, K, Mg, and Ca) and the effect of preintercalated ion on pseudocapacitive performance was studied. For all five phases, and a pH study was conducted to investigate the relationship between electrolyte pH and vanadium oxide stability in aqueous electrolyte. It was found that by lowering the pH from 6.67 to 2.35, an increase in capacitance retention of up to 35% and an increase in initial capacitance of 39 F/g could be achieved. The best initial capacity of 214 F/g observed was for aged and annealed Îþ-CaxV2O5 at a pH of 2.35. The highest capacity retention observed was 96.1 % for aged and hydrothermally treated of Îþ-LixV2O5 ℗Ơat a pH of 2.35. The second part of this master's research was focused on the adaptation of the chemical preintercalation method developed in the Materials Science and Engineering group at Drexel for the fabrication of new layered transition metal oxides beyond vanadium oxide. For the first time, a novel family of layered tungsten oxides (MxWO3℗ʺnH2O, M= Na, K, Mg, and Ca) was synthesized. Na0.2WO3℗ʺ0.8H2O phase demonstrated an initial capacitance of 60 F/g in an aqueous-based 1M H2SO4 electrolyte. Also, a pressure induced color change phenomenon was observed.
Author: Christian Julien
Publisher: Springer Science & Business Media
ISBN: 9780792366508
Category : Technology & Engineering
Languages : en
Pages : 658
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Book Description
A lithium-ion battery comprises essentially three components: two intercalation compounds as positive and negative electrodes, separated by an ionic-electronic electrolyte. Each component is discussed in sufficient detail to give the practising engineer an understanding of the subject, providing guidance on the selection of suitable materials in actual applications. Each topic covered is written by an expert, reflecting many years of experience in research and applications. Each topic is provided with an extensive list of references, allowing easy access to further information. Readership: Research students and engineers seeking an expert review. Graduate courses in electrical drives can also be designed around the book by selecting sections for discussion. The coverage and treatment make the book indispensable for the lithium battery community.
Author: Jagjit Nanda
Publisher: John Wiley & Sons
ISBN: 3527344934
Category : Technology & Engineering
Languages : en
Pages : 436
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Book Description
Transition Metal Oxides for Electrochemical Energy Storage Explore this authoritative handbook on transition metal oxides for energy storage Metal oxides have become one of the most important classes of materials in energy storage and conversion. They continue to have tremendous potential for research into new materials and devices in a wide variety of fields. Transition Metal Oxides for Electrochemical Energy Storage delivers an insightful, concise, and focused exploration of the science and applications of metal oxides in intercalation-based batteries, solid electrolytes for ionic conduction, pseudocapacitive charge storage, transport and 3D architectures and interfacial phenomena and defects. The book serves as a one-stop reference for materials researchers seeking foundational and applied knowledge of the titled material classes. Transition Metal Oxides offers readers in-depth information covering electrochemistry, morphology, and both in situ and in operando characterization. It also provides novel approaches to transition metal oxide-enabled energy storage, like interface engineering and three-dimensional nanoarchitectures. Readers will also benefit from the inclusion of: A thorough introduction to the landscape and solid-state chemistry of transition metal oxides for energy storage An exploration of electrochemical energy storage mechanisms in transition metal oxides, including intercalation, pseudocapacitance, and conversion Practical discussions of the electrochemistry of transition metal oxides, including oxide/electrolyte interfaces and energy storage in aqueous electrolytes An examination of the characterization of transition metal oxides for energy storage Perfect for materials scientists, electrochemists, inorganic chemists, and applied physicists, Transition Metal Oxides for Electrochemical Energy Storage will also earn a place in the libraries of engineers in power technology and professions working in the electrotechnical industry seeking a one-stop reference on transition metal oxides for energy storage.
Author: Pengda Hong
Publisher:
ISBN: 9781361298015
Category :
Languages : en
Pages :
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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
Author: A. Pandikumar
Publisher: CRC Press
ISBN: 1040111270
Category : Science
Languages : en
Pages : 298
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Book Description
Layered materials have attracted much attention in this decade because of their high active surface area and the ability to tune the properties through the formation of layered structures for various applications. This compliments the layered materials with high mechanical flexibility, chemical stability, and superior electrical and thermal conductivities, which make them a great alternative for electrochemical applications such as electrochemical energy conversion, storage devices, and environmental remediation. This book offers the state of the art of research on the synthesis, properties, characterization, and electrochemical applications of layered materials and highlights the present challenges related to environmental issues. It provides fundamental, experimental, and theoretical knowledge about layered materials, including graphene, graphitic carbon nitride, boron nitride, and MoS2-, Li-, and Mn-rich oxide materials and MXenes, and elaborates their synthesis, physicochemical properties, and structure-property-electrochemical performance. The book also covers the recent progress in developing layered material-based electrochemical energy conversion systems and storage devices and identifies immediate research needs and directions in developing layered material-based systems for future applications.
Author: Chul-Ho Jung
Publisher: Springer Nature
ISBN: 9811963983
Category : Technology & Engineering
Languages : en
Pages : 72
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This book addresses the comprehensive understanding of Ni-rich layered oxide of lithium-ion batteries cathodes materials, especially focusing on the effect of dopant on the intrinsic and extrinsic effect to its host materials. This book can be divided into three parts, that is, 1. overall understanding of layered oxide system, 2. intrinsic effect of dopant on layered oxides, and 3. extrinsic effect of dopant on layered oxides. To truly understand and discover the fundamental solution (e.g. doping) to improve the Ni-rich layered oxides cathodic performance, understanding the foundation of layered oxide degradation mechanism is the key, thus, the first chapter focuses on discovering the true degradation mechanisms of layered oxides systems. Then, the second and third chapter deals with the effect of dopant on alleviating the fundamental degradation mechanism of Ni-rich layered oxides, which we believe is the first insight ever been provided. The content described in this book will provide research insight to develop high-performance Ni-rich layered oxide cathode materials and serve as a guide for those who study energy storage systems.
Author: Eun Sung Lee
Publisher:
ISBN:
Category :
Languages : en
Pages : 376
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Book Description
Lithium-ion batteries are the most promising rechargeable battery system for both vehicle applications and stationary storage of electricity produced from renewable sources such as solar and wind energies. However, the current lithium ion technology does not fully meet the requirements of these applications in terms of energy and power density. One approach to realizing a combination of high energy and power density is to use a composite cathode that consists of the high-capacity lithium-rich layered oxide Li[Li, Mn, Ni, Co]O2 and the high-voltage spinel oxide LiMn[subscript 1.5]Ni[subscript 0.5]O4. This dissertation explores the unique structural characteristics and their effect on the electrochemical performance of the layered-spinel composite oxide cathodes along with individual layered and spinel oxides over a wide voltage range (5.0 -- 2.0 V). Initially, the effect of cation ordering on the electrochemical and structural characteristics of LiMn[subscript 1.5]Ni[subscript 0.5]O4 during cycling between 5.0 and 2.0 V were investigated by an analysis of the X-ray diffraction (XRD) and electrochemical data. Structural studies revealed that the cation ordering affects the size of the empty-octahedral sites in the spinel lattice. The differences in the size of the empty-octahedral sites affect the discharge profile below 3 V due to the variation in lattice distortion during lithium ion insertion into 16c octahedral sites. With the doped LiMn1.5Ni0.5-xMxO4 (M = Cr, Fe, Co, and Ga) spinels, different dopant ions have different effects on the degree of cation ordering due to the differences in ionic radii and surface-segregation characteristics. The compositional and wt.% variations of the layered and spinel phases from the nominal values in the layered-spinel composites were obtained by employing a joint XRD and neutron diffraction (ND) Rietveld refinement method. With the obtained composition and ex-situ XRD data, the mechanism for the increase in capacity and the facile phase transformation of the layered phase in the composite cathodes to a 3 V spinel-like phase during cycling was proposed. Investigations focused on synthesis temperature revealed that the electrochemical characteristics of the composites are highly affected by the synthesis temperature due to the change in the surface area of the sample and cation ordering of the spinel phase. In addition, the electrochemical performance of the lithium-rich layered oxide Li[Li, Mn, Ni, Co]O2 could be improved by blending it with a lithium-free insertion host VO2(B) and by controlling the amount of lithium ions extracted from the layered lattice during the first charge process.
Author: Dong Zhang
Publisher:
ISBN:
Category :
Languages : en
Pages : 282
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