Download or read book Synthesis and Characterization of Nano scale Vanadium Oxides Vanadium Phosphates as Cathodes for Lithium Batteries written by Chunmei Ban and published by ProQuest. This book was released on 2008 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Low Temperature Synthesis and Characterization of Novel Transition Metal Vanadium Oxides and Manganese Oxides as Cathodes for Lithium Batteries written by Fan Zhang and published by . This book was released on 1999 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis and Characterization of Vanadium based Cathode Materials for Lithium Ion Batteries written by 李航空 and published by . This book was released on 2018 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis and Characterization of Novel Manganese and Vanadium Oxides as Cathodes for Lithium Rechargeable Batteries written by Rongji Chen and published by . This book was released on 1998 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hydrothermal Synthesis and Characterization of Vanadyl Phosphate Based Cathode Materials for Lithium Ion Batteries written by Youngmin Chung and published by . This book was released on 2016 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hydrothermal Synthesis and Characterization of Novel Vanadium Oxides and Their Application as Cathodes in Lithium Secondary Batteries written by Thomas G. Chirayil and published by . This book was released on 1998 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis and Electrochemical Characterization of Lithium Vanadium Phosphate written by Chwan Hai Harold Hsiung and published by . This book was released on 2004 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) LVP has a higher operating voltage (4.78V) than the current Li-ion battery standard (3.6V), but there are issues with becoming amorphous, cycleability, and active material accessibility. From the EIS data, passivating films on the surface of the LVP cathode do not seem to be a factor in limiting performance. The conductivity data gives a higher than expected conductivity (4.62* 10-4 S/cm).

Download or read book Synthesis and Characterization of Vanadium Oxide Nanomaterials written by Tyler M. Fears and published by . This book was released on 2015 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This dissertation focuses on the synthesis and characterization of vanadium oxide nanomaterials and neutron-transparent Li-ion battery electrolytes. Vanadium oxide gels were synthesized via the epoxide-assisted gelation of VOCl3 using epichlorohydrin in ethanol. This represents the first epoxide-assisted gelation developed for vanadium oxide gels and serves as a potential economical replacement for the fabrication of vanadium oxide gels via the hydrolysis of vanadium alkoxides. Though epoxide-assisted gelation has been demonstrated for a number of transition metal oxides, the gelation mechanism observed here for VOCl3 appears to be unique. While investigating the electrochemical and structural properties of lithium vanadates, it became desirable to perform in situ neutron diffraction with electrochemical cycling. The inability to perform these experiments prompted the development of a series of perfluorocarboxylate esters which could potentially serve as neutron-transparent electrolyte solvents and help enable in situ neutron scattering characterizations. Electrochemical studies were carried out on Si anodes, and the solid-electrolyte-interphase was studied both ex situ and in situ. Results indicate that these electrolyte solvents improve neutron scattering data when used in place of standard deuterated carbonates and provide insight into fluorinated components proposed for next-generation electrolytes"--Abstract, page iv.

Download or read book Vanadium Based Nanomaterials for Electrochemical Energy Storage written by Liqiang Mai and published by Springer Nature. This book was released on 2023-11-20 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a comprehensive review of recent developments in vanadium-based nanomaterials for next-generation electrochemical energy storage. The basic electrochemical energy storage and conversion equipment are elaborated, and the vanadium-based nanomaterials of the synthesis approaches, characterizations, electrochemical storage mechanisms, and performance optimization tactics are discussed. Examples are taken from various chemical energy storage devices to expound the functions of advanced vanadium-based nanomaterials for specific applications. Finally, various challenges and perspectives on vanadium-based nanomaterial development as an emerging energy storage solution are considered.

Download or read book Synthesis and Characterization of Lithium Iron Phosphate as Cathode Material for Lithium Ion Batteries written by Feray Chi Hung Wong and published by . This book was released on 2011 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Low temperature Synthesis and Electrochemical Properties of Aliovalently doped Phosphates and Spinel Oxides written by Arturo Gutierrez and published by . This book was released on 2014 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lithium-ion batteries are being intensely pursued as energy storage devices because they provide higher energy and power densities compared to other battery systems such as lead-acid and nickel-metal hydride batteries. This dissertation (i) explores the use of a low-temperature microwave-assisted synthesis process to obtain aliovalently-doped lithium transition-metal phosphates and lower-valent vanadium oxide spinels, some of which are difficult to obtain by conventional high-temperature processes, and (ii) presents an investigation of the electrochemical properties of the aliovantly-doped phosphate cathodes and doped lithium manganese oxide and oxyfluoride spinel cathodes in lithium-ion batteries. Following the introduction and general experimental procedures, respectively, in Chapters 1 and 2, Chapter 3 first focuses on understanding of how the inductive effect and structural features in lithium transition-metal borate, silicate, and phosphate cathodes affect the M2+ʹ3+redox energies. It is found that the magnitude of the voltages delivered by the polyanion cathodes can be predicted based simply on the coordination of the transition-metal ion. Furthermore, the differences in the voltages delivered by the phosphates and pyrophosphates are explained by considering the resonance structures and their contribution to the covalency of the polyanion. Chapter 4 presents a low-temperature microwave-assisted solvothermal process to substitute 20 atom % V3+ for Mn2+ in LiMnPO4. It is shown that the solubility of vanadium in LiMnPO4 decreases upon heating the doped samples to ≥ 575 °C, demonstrating the importance of employing a low-temperature process to achieve aliovalent doping in LiMnPO4. It is further demonstrated that by increasing the vanadium content in the material, the discharge capacity in the first cycle could be increased without any additional carbon coating. Subsequent X-ray absorption spectroscopy data reveal that the better performance is facilitated by enhanced Mn-O hybridization upon incorporating vanadium into the lattice. Chapter 5 explores the influence of various factors, such as the oxidation state of Mn, electronegativity of the dopant cation Mn+, and the dissociation energy of M-O bond, on the electrochemical properties of cation-doped oxide and oxyfluoride spinel cathodes. As an extension, Chapter 6 presents the effect of processing conditions on the surface concentration of the dopant cation Mn+. Chapter 7 presents an extension of the low-temperature microwave-assisted synthesis process to obtain AV2O4 (Mg, Fe, Mn, and Co) spinel oxides. The method is remarkably effective in reducing the synthesis time and energy use due to the efficiency of dielectric heating compared to conventional heating. The ability to access V3+ is facilitated by the relative positions of the energy levels of the cations in solution, which is lower than that in the solid, and the use of a strong reducing solvent like TEG. Finally, Chapter 8 provides a summary of the salient findings in this dissertation.

Download or read book Iron Phosphate Materials as Cathodes for Lithium Batteries written by Pier Paolo Prosini and published by Springer Science & Business Media. This book was released on 2011-07-31 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: Iron Phosphate Materials as Cathodes for Lithium Batteries describes the synthesis and the chemical–physical characteristics of iron phosphates, and presents methods of making LiFePO4 a suitable cathode material for lithium-ion batteries. The author studies carbon’s ability to increase conductivity and to decrease material grain size, as well as investigating the electrochemical behaviour of the materials obtained. Iron Phosphate Materials as Cathodes for Lithium Batteries also proposes a model to explain lithium insertion/extraction in LiFePO4 and to predict voltage profiles at various discharge rates. Iron Phosphate Materials as Cathodes for Lithium Batteries is written for postgraduate students and researchers in electrochemistry, R&D professionals and experts in electrochemical storage.

Download or read book Synthesis and Characterization of Vanadium Phosphates and Borophosphates written by Junghwan Do and published by . This book was released on 2000 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis and Characterization of Vanadium III and Vanadium IV Complexes with Phosphate and Phosphonate Ligation written by Marlene Anne Natamihardja and published by . This book was released on 2005 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Microwave Assisted Synthesis of Silver Vanadium Phosphorus Oxide Ag2VO2PO4 written by and published by . This book was released on 2016 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: We study silver vanadium phosphorus oxide, Ag2VO2PO4, that is a promising cathode material for Li batteries due in part to its large capacity and high current capability. Herein, a new synthesis of Ag2VO2PO4 based on microwave heating is presented, where the reaction time is reduced by approximately 100× relative to other reported methods, and the crystallite size is controlled via synthesis temperature, showing a linear correlation of crystallite size with temperature. Notably, under galvanostatic reduction, the Ag2VO2PO4 sample with the smallest crystallite size delivers the highest capacity and shows the highest loaded voltage. Further, pulse discharge tests show a significant resistance decrease during the initial discharge coincident with the formation of Ag metal. Thus, the magnitude of the resistance decrease observed during pulse tests depends on the Ag2VO2PO4 crystallite size, with the largest resistance decrease observed for the smallest crystallite size. Additional electrochemical measurements indicate a quasi-reversible redox reaction involving Li+ insertion/deinsertion, with capacity fade due to structural changes associated with the discharge/charge process. In summary, this work demonstrates a faster synthetic approach for bimetallic polyanionic materials which also provides the opportunity for tuning of electrochemical properties through control of material physical properties such as crystallite size.

Download or read book Synthesis and Characterization of Vanadium Oxide Nanotubes written by Muhammad Najib Mazlan and published by . This book was released on 2000 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Phosphate Based Cathodes and Reduced Graphene Oxide Composite Anodes for Energy Storage Applications written by Abdulrahman Shahul Hameed and published by Springer. This book was released on 2016-08-09 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis outlines the investigation of various electrode materials for Li-ion battery (LIB) applications. Li-ion batteries are widely used in various portable electronic devices owing to their compactness, light weight, longer life, design flexibility and environment friendliness. This work describes the detailed synthesis and structural studies of various novel phosphate based cathode materials and reduced graphene oxide (rGO) composites as anode materials. Their electrochemical characterization as electrode for LIBs has been investigated in detail. The thesis also includes a comprehensive introduction for non-specialists in this field. The research could benefit and will appeal to scientists, especially new researchers working in the field of energy storage.