Download or read book Synthesis and Characterization of Activated Carbon and Manganese based Oxide layered Double Hydroxide Materials for Supercapacitor Applications written by Faith Ukamaka Ochai-Ejeh and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this study is to synthesize and characterize cheap, efficient and high-performance 3D activated carbon (AC) from cork (Quercus Suber) by KOH and KHCO3 activation respectively, Co-Mn LDH and MnO2-CNT nanocomposite materials with meso/microporous structures for energy storage application. The AC derived from cork (Q.suber) was synthesized with KOH in order to investigate the electrochemical performance of the AC in relation to KOH activation concentration and the AC synthesized by KHCO3 device because both materials performed well in 1 M KOH alkaline electrolyte, while ACKOH was chosen as the negative electrode in the MnO2-CNT//ACKOH device because both materials showed good performance in 1 M Li2SO4 neutral electrolyte. The aim of the hybrid devices was to take advantage of the individual working potentials of the electrode materials for enhanced electrochemical performance. All devices tested displayed energy densities ranging from iÌ8℗1℗l14 - iÌ8℗1℗l25 Wh kg-1 with corresponding power densities ranging from iÌ8℗1℗l450 aÌ22́Ơ0́− iÌ8℗1℗l500 W kg-1 at a specific current of 0.5 Ag-1 in the operating voltage window of between 1.6 V and 2.0 V in aqueous electrolyte media. All the materials tested displayed 99.7% - iÌ8℗1℗l100 % long-term cycling stability, showcasing the potential use of these materials as electrode materials for electrochemical capacitors.

Download or read book Layered Double Hydroxide Polymer Nanocomposites written by Sabu Thomas and published by Woodhead Publishing. This book was released on 2019-11-28 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanocomposites based on layered double hydroxides (LDHs) have recently become a formidable research area due to their amendable properties and potential applications. The distinct properties of LDH polymer nanocomposites include a wide range of chemical compositions, structural homogeneity, unique anion exchanging ability, easy synthesis, high bound water content, memory effect, non-toxicity and biocompatibility. This means that LDH polymer nanocomposites have the potential for new and innovative applications. Layered Double Hydroxide Polymer Nanocomposites presents a comprehensive overview of the recent innovative advances in the fabrication, characterization and applications of LDH polymer nanocomposites. As well as covering fundamental structural and chemical knowledge, this book also explores various properties and characterization techniques including microscopic, spectroscopic and mechanical behaviors. There is also a strong focus on the potential applications of LDH polymer nanocomposites, such as energy, electrical and electronic, electromagnetic shielding, biomedical, agricultural, food packaging and water purification functions. This book provides comprehensive coverage of cutting-edge research in the field of LDH polymer nanocomposites and their future applications. This book will be an essential read for all academics, researchers, engineers and students working in this area. Fundamental knowledge of LDH polymer nanocomposites, including chemical composition, structural features and fabrication techniques Provides an analytical overview of the different types of characterization techniques and technologies Extensive review on cutting-edge research for potential future applications, in a variety of industries

Download or read book Part I Manganese Oxide Containing Layered Double Hydroxides Materials Synthesis and Characterization written by Josanlet C. Villegas and published by . This book was released on 2006 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis and Characterization of Co based Hydroxides and Mental Disulphides with Various Forms of Carbon for Supercapacitor Applications written by Tshifhiwa Moureen Masikhwa and published by . This book was released on 2016 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Carbon and Inorganic based Nanostructures for Energy Applications written by Federico Cesano and published by Frontiers Media SA. This book was released on 2021-01-04 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nanomaterials for Electrochemical Energy Storage Devices written by Poulomi Roy and published by John Wiley & Sons. This book was released on 2019-10-14 with total page 567 pages. Available in PDF, EPUB and Kindle. Book excerpt: Energy storage devices are considered to be an important field of interest for researchers worldwide. Batteries and supercapacitors are therefore extensively studied and progressively evolving. The book not only emphasizes the fundamental theories, electrochemical mechanism and its computational view point, but also discusses recent developments in electrode designing based on nanomaterials, separators, fabrication of advanced devices and their performances.

Download or read book Nanomaterials for Supercapacitors written by Ling Bing Kong and published by CRC Press. This book was released on 2017-11-22 with total page 527 pages. Available in PDF, EPUB and Kindle. Book excerpt: New materials hold the key to fundamental advances in energy conversion and storage, both of which are vital in order to meet the challenge of global warming and the finite nature of fossil fuels. Nanomaterials in particular offer unique properties or combinations of properties as electrodes and electrolytes in a range of energy devices. Supercapacitors have been widely acknowledged to be promising devices for energy storage. This book describes the latest progress in the discovery and development of nanoelectrolytes and nanoelectrodes for supercapacitor applications.

Download or read book Preparation and Characterization of Manganese based and Carbon based Nanomaterials for Supercapasitors Application written by Gomma Abdelgawad Mohammed Ali and published by . This book was released on 2015 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, electrochemical materials, namely MnO2, reduced graphene oxide (rGO), porous carbon nanoparticles (PCNs), and rGO/MnO2 nanocomposite, were prepared in diverse morphologies such as nanoflowers (MnO2), nanosheets (rGO), and nanoparticles (carbon). Different physical and chemical characterizations have been conducted to study the structural and morphological properties of the materials under study. Electrochemical properties of the above materials have been studied comprehensively using cyclic voltammetry (CV), galvanostatic charge-discharge (CDC) and electrochemical impedance spectroscopy (EIS) in order to evaluate their suitability as an electrode for supercapacitive energy storage. MnO2 nanoflowers was recovered from spent batteries by a combining leaching and electrowinning techniques. The recovered MnO2 nanoflowers exhibited high specific capacitance (Cs) (303 F g-1 at 5 mV s-1). Furthermore, MnO2 was electrodeposited by potentiostatic and galvanostatic conditions. Under similar electrodeposition conditions, MnO2 deposited by galvanostatic condition showed smaller particle size, less compact layered structure and wider band gap compared to potentiostatic deposition. The galvanostatic MnO2 rendered facile ions diffusion, low resistances and showed superior capacitive behavior. The rGO nanosheets were prepared by hydrazine reduction of graphene oxide and their electrochemical properties were studied. The rGO showed high Cs of 191 and 168 F g-1 at 5 mV s-1, in 5 M KOH and 1 M Na2SO4, respectively and high cycling stability > 96 % over 1000 cycles. In addition, PCNs with fine particles size of 35 nm were prepared from oil palm leaves using a catalyst free process. The Cs of PCNs is 245 and 213 F g-1 at 5 mV s-1 in 5 M KOH and 1 M Na2SO4, respectively. The PCNs showed high cycling stability of 95 %. Practical supercapacitors were developed using rGO and PCNs; the devices delivered energy densities ~18 and ~25 W h kg-1 at power densities 340 and 360 W kg-1, respectively, under wider operating voltage window of 2 V in neutral electrolyte. rGO/MnO2 nanocomposite has been prepared by simultaneous electrochemical conversion of GO and Mn3O4. The Cs of rGO/MnO2 is 457 F g-1 at 5 mV s-1, which are several folds higher compared to those for pure rGO and MnO2. Furthermore, rGO/MnO2 showed high stability of 95 % over 2000 CDC cycles. Therefore, the present study identifies electrochemical materials with improved energy storage capabilities.

Download or read book Comprehensive Energy Systems written by Ibrahim Dincer and published by Elsevier. This book was released on 2018-02-07 with total page 5543 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive Energy Systems, Seven Volume Set provides a unified source of information covering the entire spectrum of energy, one of the most significant issues humanity has to face. This comprehensive book describes traditional and novel energy systems, from single generation to multi-generation, also covering theory and applications. In addition, it also presents high-level coverage on energy policies, strategies, environmental impacts and sustainable development. No other published work covers such breadth of topics in similar depth. High-level sections include Energy Fundamentals, Energy Materials, Energy Production, Energy Conversion, and Energy Management. Offers the most comprehensive resource available on the topic of energy systems Presents an authoritative resource authored and edited by leading experts in the field Consolidates information currently scattered in publications from different research fields (engineering as well as physics, chemistry, environmental sciences and economics), thus ensuring a common standard and language

Download or read book Chemically Deposited Nanocrystalline Metal Oxide Thin Films written by Fabian I. Ezema and published by Springer Nature. This book was released on 2021-06-26 with total page 926 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book guides beginners in the areas of thin film preparation, characterization, and device making, while providing insight into these areas for experts. As chemically deposited metal oxides are currently gaining attention in development of devices such as solar cells, supercapacitors, batteries, sensors, etc., the book illustrates how the chemical deposition route is emerging as a relatively inexpensive, simple, and convenient solution for large area deposition. The advancement in the nanostructured materials for the development of devices is fully discussed.

Download or read book Functional Manganese Oxide Silicon and Carbon Materials written by Weina Li and published by . This book was released on 2007 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nanostructured Ceramic Oxides for Supercapacitor Applications written by Avinash Balakrishnan and published by CRC Press. This book was released on 2014-02-19 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: A fresh and innovative technology is currently being recognized as a viable replacement for batteries. Research in the field of supercapacitors, as well as in the area of ceramic materials and their application to supercapacitor development, has spawned Nanostructured Ceramic Oxides for Supercapacitor Applications. Featuring key contributions from

Download or read book Handbook of Supercapacitor Materials written by Rajender Boddula and published by John Wiley & Sons. This book was released on 2021-12-20 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to Electromagnetic Waves with Maxwell???s Equations Discover an innovative and fresh approach to teaching classical electromagnetics at a foundational level Introduction to Electromagnetic Waves with Maxwell???s Equations delivers an accessible and practical approach to teaching the well-known topics all electromagnetics instructors must include in their syllabus. Based on the author???s decades of experience teaching the subject, the book is carefully tuned to be relevant to an audience of engineering students who have already been exposed to the basic curricula of linear algebra and multivariate calculus. Forming the backbone of the book, Maxwell???s equations are developed step-by-step in consecutive chapters, while related electromagnetic phenomena are discussed simultaneously. The author presents accompanying mathematical tools alongside the material provided in the book to assist students with retention and comprehension. The book contains over 100 solved problems and examples with stepwise solutions offered alongside them. An accompanying website provides readers with additional problems and solutions. Readers will also benefit from the inclusion of: A thorough introduction to preliminary concepts in the field, including scalar and vector fields, cartesian coordinate systems, basic vector operations, orthogonal coordinate systems, and electrostatics, magnetostatics, and electromagnetics An exploration of Gauss??? Law, including integral forms, differential forms, and boundary conditions A discussion of Ampere???s Law, including integral and differential forms and Stoke???s Theorem An examination of Faraday???s Law, including integral and differential forms and the Lorentz Force Law Perfect for third- and fourth-year undergraduate students in electrical engineering, mechanical engineering, applied maths, physics, and computer science, Introduction to Electromagnetic Waves with Maxwell???s Equations will also earn a place in the libraries of graduate and postgraduate students in any STEM program with applications in electromagnetics.

Download or read book Design Synthesis and Characterization of Transition Metal Oxide Based Functional Materials for Multi phase Catalytic Applications written by and published by . This book was released on 2015 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis Characterization and Applications of Nano functional Transition Metal Oxides Materials and Graphite Anode Modified by Cvd Carbon Coating written by Yunshuang Ding and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This research consists of two major sections. The first section of this research is focused on developing novel synthesis methods, characterization, and catalytic applications of multi-functional transition metal oxides including manganese oxide nano-materials (2x2 tunel structured manganese oxide octahedral molecular sieve), 3D hierarchical nano-architecture -MnO2 and cobalt oxides, and cobalt based materials. Manganese oxide octahedral molecula sieves (OMS) have ID open framework structures with various theoretical nano-scale tunnel size materials have been investigated extensively as low cost and environmentally benign ionic and molecular sieves and efficient redox catalysts. A novel and efficient solvent-free method has been developed to synthesize manganese oxides with 2 x 2 tunnel structures. The properties of the synthesized OMS-2 materilas have been compared with that synthesized by conventional reflux and hydrothermal methods. Epsilon manganese dioxides with controlled novel 3D architectures have been fabricated via a hydrothermal chemical reaction. The effects of reaction time and reaction temperature on the morphology of the final -MnO2 are investigated, and the formation mechanisms of the hierarchical nano-architectures are proposed. The magnetic properties of -MnO2 are also studied. Resides manganese oxides, a microwave-heating reflux route has been used to synthesize 3D flower like cobalt hydrotalcite-like compounds with layered structure and these compounds can be transferred into spinel structure of Co3O 4. Both materials show the electrocatalytic activity and stability for the electrochemical reduction of oxygen. Therefore these materials have the potential to be electrocatyltic catalysts. The second section of the research is to study the microstructure of carbon films coated on the iron and graphite particles by a Chemical Vapor Deposition (CVD) method and the relationship between the microstructure of the carbon coatings and their effects on electrochemical properties.

Download or read book Synthesis Characterization and Pseudo capacitive Performance of Manganese Oxide Nanostructures written by Chung-Ying Tsai and published by . This book was released on 2012 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this research, manganese oxide based nanoparticles were synthesized by sol-gel process. Methanol, ethanol, and propanol were used as alternative solvents during sol-gel process with manganese acetate as precursor for the preparation of pristine manganese oxide. Hybrid manganese oxide modified by additions of carbon nanotubes was further prepared. The effects of different solutions and heat treatment temperatures on the morphology, physical characteristics, and electrochemical properties of the manganese oxide based materials were investigated. Particle size of pristine manganese oxide samples prepared from methanol, ethanol, and propanol were compared by SEM and TEM image analysis. Smallest particle size was observed for manganese oxide prepared from propanol, with diameters range from 16 nm to 50nm. XRD results showed that the as-prepared manganese oxide based samples treated at calcination temperature of 300oC and above were composed of Mn 2 O3 as dominant phase, with Mn3 O4 as minor phase. Specific capacitance of manganese oxide prepared from methanol, ethanol, and propanol at scan rate of 10 mV/s measured using two electrode systems were 88.3, 66.0, and 104.8 F/g, respectively and that for the hybrid sample was 140.5 F/g. Results from electrochemical impedance spectroscopy (EIS) also showed superior electrochemical properties of the hybrid sample over pristine manganese oxide samples. It is evident that the addition of carbon nanotubes not only improved the specific capacitance but also the overall electrochemical properties of the manganese oxide supercapacitor.

Download or read book Layered Double Hydroxide Based Catalytic Materials for Sustainable Processes written by and published by . This book was released on 2022-08-12 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: