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 Synthesis and Characterization of High Tap density LiFePO4 Cathode Material for Lithium Ion Batteries written by 陳文勤 and published by . This book was released on 2010 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 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 Lithium Iron Phosphate A Promising Cathode Active Material for Lithium Secondary Batteries written by Gouri Cheruvally and published by Trans Tech Publications Ltd. This book was released on 2008-04-26 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the first development of lithium-ion batteries in the early 1990’s, there have been tremendous advances in the science and technology of these electrochemical energy sources. At present, lithium batteries dominate the field of advanced power sources and have almost entirely replaced their bulkier and less energetic counterparts such as nickel-cadmium and nickel-metalhydride batteries; especially in portable electronic devices. But lithium batteries are still the object of continuing intense research aimed at making further improvements in performance and safety, at lower cost, so as to make them suitable for higher-power and more demanding applications such as electric vehicles. The research and development of new electrode materials, particularly for cathodes, having an improved electrochemical performance has always been a matter of changing focus. Thus, olivine, lithium iron phosphate, has attracted considerable attention in recent years as a safe, environmentally friendly, extremely stable and very promising cathode material.

Download or read book Synthesis Characterization and Electrochemical Evaluation of Lithium manganese Phosphates for Cathode Material in Lithium Ion Batteries written by Evelyn Kai-Hua Ng and published by . This book was released on 2006 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lithium ion batteries deliver the highest specific energy and energy density of commercially available secondary batteries. The objective of this study was to evaluate lithium-manganese phosphate (LiMnPO4) for potential application as a cathode material in lithium ion batteries due to its high theoretical capacity and stable phospho-olivine structure. LiMnPO 4 was successfully synthesized via a novel aqueous sol-gel process under an inert nitrogen and air atmosphere. Microstructural design strategies including annealing treatment and the addition of 1 wt% copper dopant were evaluated in order to improve the electrochemical performance of the LiMnPO4 cathode. The cathode particle microstructure and morphology were characterized using X-ray diffraction and scanning electron microscopy. Open circuit voltage was 4.1 V for all samples. The electrochemical performance of LiMnPO 4 is significantly improved by the addition of a dopant in an inert nitrogen atmosphere with a specific capacity of 28 mAh/g achieved during the first discharge cycle.

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 Characterization and Aging Behavior of Silicate and Phosphate Based Cathode Materials for Lithium Ion Batteries written by Christian Dippel and published by . This book was released on 2013 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electric Vehicles written by Seref Soylu and published by BoD – Books on Demand. This book was released on 2011-09-06 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, theoretical basis and design guidelines for electric vehicles have been emphasized chapter by chapter with valuable contribution of many researchers who work on both technical and regulatory sides of the field. Multidisciplinary research results from electrical engineering, chemical engineering and mechanical engineering were examined and merged together to make this book a guide for industry, academia and policy maker.

Download or read book Organic Template assisted Synthesis Characterization of Active Materials for Li ion Batteries written by Chae-Ho Yim and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Lithium-ion (Li-ion) battery is one of the major topics currently studied as a potential way to help in reducing greenhouse gas emissions. Major car manufacturers are interested in adapting the Li-ion battery in the power trains of Plug-in Hybrid Electric Vehicles (PHEV) to improve fuel efficiency. Materials currently used for Li-ion batteries are LiCoO2 (LCO) and graphite--the first materials successfully integrated by Sony into Li-ion batteries. However, due to the high cost and polluting effect of cobalt (Co), and the low volumetric capacity of graphite, new materials are being sought out. LiFePO4 (LFP) and SnO2 are both good alternatives for the cathode and anode materials in Li-ion batteries. But, to create high-performance batteries, nano-sized carbon-coated particles of LFP and SnO2 are required. The present work attempts to develop a new synthesis method for these materials: organic template-assisted synthesis for three-dimensionally ordered macroporous (3DOM) LFP and porous SnO2. With the newly developed synthesis, highly pure materials were successfully synthesized and tested in Li-ion batteries. The obtained capacity for LFP was 158m Ah/g, which is equivalent to 93% of the theoretical capacity. The obtained capacity for SnO2 was 700 mAh/g, which is equivalent to 90% of the theoretical capacity. Moreover, Hybrid Pulse Power Characterization (HPPC) was used to test LFP and LCO for comparison and feasibility in PHEVs. HPPC is generally used to test the feasibility and capacity fade for PHEVs. It simulates battery use in various driving conditions of PHEVs to study pulse energy consumption and regeneration. In this case, HPPC was conducted on a half-cell battery for the first time to study the phenomena on a single active material, LFP or LCO. Based on the HPPC results, LFP proved to be more practical for use in PHEVs.

Download or read book Synthesis Characterization of Advanced Materials for Lithium ion Batteries written by Rachid Amine and published by . This book was released on 2009 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis and Characterization of Nanostructured Cathode Materials for Rechargeable Lithium lithium Ion Batteries written by Jingsi Yang and published by . This book was released on 2005 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis and Characterization of Morphology controllable Li 1 x Mn1 5 Ni0 5 O4 0 x 0 11 as Cathode Materials for Lithium ion Batteries written by Yunxian Qian and published by . This book was released on 2013 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Preparation and Characterization of LiFePO4 based Cathode Materials Prepared by Template Method for Lithium Ion Batteries written by Wan Rosemaria Nurul Huda Wan Baharom and published by . This book was released on 2013 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis Characterization and Performance of Cathodes for Lithium Ion Batteries written by Jianxin Zhu and published by . This book was released on 2014 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lithium ion batteries provide a high energy density, higher voltage as well as a long shelf life compared to traditionally used lead acid, NiMH and NiCd batteries. Thus, they are a very promising energy storage system for our daily life. As one of the most important components in a battery, cathode materials have been investigated intensively in recent years as they play a key role in determining the cell voltage and discharge capacity in a battery. Both layered Li(Ni 1/3 Co1/3 Mn1/3 )O 2 (NCM) and olivine-structured LiFePO4 (LFP) materials are promising cathode candidates. However, these cathodes also have some disadvantages that have hindered further commercialization. The main issue with NCM is its rapid performance decay upon cycling. In addition, LFP is hindered by a low rate capacity and low lithium ion diffusivity.

Download or read book Synthesis and Electrochemical Characterization of Novel Electroactive Materials for Lithium ion Batteries written by Karl Joseph Kreder (III) and published by . This book was released on 2017 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lithium-ion batteries (LIBs) have become ubiquitous as energy storage devices for mobile electronics, electric vehicles, and are beginning to be used for electric grid-scale energy storage. Lithium-ion batteries offer higher efficiencies, energy density, and longer life compared to incumbent technologies such as lead-acid and nickel metal hydride. Applications in which LIBs are used are continuing to demand better performing batteries at lower cost, which requires improvement in electroactive materials. This dissertation investigates the low temperature synthesis and modification of LiCoPO4 as a potential high-voltage and therefore higher energy density polyanion cathode material for LIBs, as well as a new class of interdigitated metal foil anodes which promises to be an inexpensive, higher energy density, alternative to graphite. Chapter 1 is a brief introduction to lithium-ion batteries and the principle of operation of intercalation type electrochemical energy storage devices. The components of lithium ion batteries are introduced, specifically the anode, cathode, separator, and electrolyte. Some of the shortfalls of the current technologies are discussed and areas of research interest are highlighted. Chapter 2 is a brief overview of the various experimental methods that are generally applicable to more than one of the subsequent chapters. Methods which are specific to a given study are discussed in their respective chapters. Chapter 3 presents work on the low temperature microwave-assisted solovthermal synthesis (MW-ST) of three unique polymorphs of LiCoPO4, specifically the polymorphs belonging to the Pnma, Cmcm, and Pn21a space groups. Prior to this work, only the Pnma polymorph had been reported via MW-ST method, and electrochemistry had not yet been reported for either the Pn21a or Cmcm polymorph. The dependence of the polymorphs on both the water content, and ammonium hydroxide content of the solvent was shown. Although, the electrochemistry of both the Pn21a and Cmcm polymorphs was found to be inferior to the Pnma polymorph, the ability to synthesize phase pure materials was crucial to conducting the work presented in chapters 4 and 5. Chapter 4 presents the aliovalent substitution of V3+ for Co2+ in LiCoPO4 via a low-temperature MW-ST process. Substitution of up to 7% vanadium for cobalt was demonstrated and verified by changes in the lattice parameters with vanadium content. Both the ionic and electronic conductivity of LiCoPO4 was enhanced with increasing vanadium substitution, which was attributed to the introduction of both charge carriers as well as inter-tunnel cobalt vacancies. Finally, the first cycle capacity was enhanced (from 69 mAh/g to 115 mAh/g) as well as the capacity retention over cycling. Chapter 5 demonstrates a novel technique of MW-ST assisted coating of a thin (2-5nm) conformal coating of LiFePO4 on vanadium substituted LiCoPO4. Although the vanadium substitution was able to independently increase the performance of LiCoPO4, the materials still suffers from severe side reactions with the electrolyte. The coating of LiFePO4 effectively raises the Fermi energy of the cathode material above the high occupied molecular orbital (HOMO) of the electrolyte preventing side reactions and increase the coulombic efficiency to nearly 100%. Chapter 6 introduces a novel method of producing high surface area, electrically conductive, metal nanofoams via a MW-ST process. Nickel, copper, and silver metal nanofoams are made via an inexpensive yet scalable process whereby metal acetates are reduced by polyglycol under microwave irradiation. The nanofoams were characterized via BET, SEM, XRD, EDS, and TEM. The nanofoams have potential uses in many clean energy applications, particularly lithium-ion batteries. Chapter 7 introduces a new framework for making a new class of high capacity, low-cost alloying anodes for lithium ion batteries. A novel interdigitated metal foil anode (IMFA) in which a nanosized active material, such as tin, is interdigitated with an electrically conductive matrix, such as aluminum, is presented. The foils are formed by the rolling of a eutectic Al-Sn alloy into a foil, which is an extremely cheap and scalable process. The anodes demonstrate an approximately 70% increase in capacity compared to graphite over 100 cycles, at reasonably fast rates (C/5), and high coulombic efficiency (>99%). Finally, Chapter 8 gives a brief overview of the results of the prior work and proposes areas for future research

Download or read book Synthesis and Characterization of Novel Cathode Material with Improved Specific Capacity and Safety for Lithium Ion Batteries written by Wassima El Mofid and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Die steigenden Anforderungen an Lithium-Ionen-Batterien mit hoher spezifischer Leistung und Energie haben zur Entwicklung von mehreren Klassen von Materialien für die positive Elektrode geführt. Darunter sind unter anderem die vielversprechenden LiNixMnyCo1-x-yO2 (NMC) Materialien. In diesem Zusammenhang ist das Thema dieser Arbeit eine umfangreichen Studie der elektrochemischen und strukturellen Eigenschaften des ursprünglichen Materials NMC (3:1:1) (LiNi0.6Mn0.2Co0.2O2) und der drei neuen Materialien, die entweder durch Mono-Substitution von Co mit Al oder Fe: NMCA (LiNi0.6Mn0.2Co0.15Al0.05O2) und NMCF (LiNi0.6Mn0.2Co0.15Fe0.05O2) oder durch doppelte Substitution von Co mit Al und Fe NMCAF (LiNi0.6Mn0.2Co0.15Al0.025 Fe0.025O2) hergestellt wurden. Im ersten Schritt wurde eine Optimierung der Synthesebedingungen durchgeführt. Dazu wurden verschiedene Verfahren (z.B. Röntgenbeugung, Rasterelektronenmikroskopie) verwendet, um homogene Phasen mit gut geordneter Struktur zu erhalten. Im zweiten Schritt wurden Struktur, morphologische und elektrochemische Eigenschaften der vier Materialien untersucht. Eine detailliertere Untersuchung wurde NMCAF gewidmet. Dieses Material zeigte die besten elektrochemischen Eigenschaften im Vergleich zu den ursprünglichen und den mono-substituierten Materialien. Ziel ist es zu verstehen, was die Mechanismen hinter der Verbesserung des elektrochemischen Verhaltens des doppelsubstituierten Materials sind. Schließlich wurde der Sicherheitsaspekt von NMCAF auf Basis einer detaillierten Untersuchung der thermischen Stabilität während der Lithium-Ionen-Deinterkalation diskutiert.