Download or read book Ionic Liquid for High Voltage Supercapacitor written by Jeeyoung Yoo and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Pure ionic liquids (ILs) and IL mixtures in organic solvents have been investigated for higher operating voltages around 3.0-4.0 V. ILs have design flexibility due to the numerous possible combinations of anions and cations. Current research on ILs as electrolytes has focused on several ILs, including imidazolium and pyrrolidinium. At early stages, various ILs have been studied as salts of electrolyte with organic solvents like acetonitrile and propylene carbonate. Neat ILs have been applied for high-performance electrolyte, and some of them have been used as electrolyte (1-ethyl 3-methylimidazolium tetrafluoroborate). These liquid electrolytes need additional encapsulation; therefore, SCs applied ILs face difficulty in integration and manufacturing flexible devices. These drawbacks can be solved by adopting a polymer electrolyte because the ILs maintain the conductivity even when solidified, unlike a typical organic electrolyte. Common polymer matrixes such as PVdF, PMMA, and PVA have been suggested to embed ILs. Poly(ionic liquid) (PIL) is also studied. PIL is a polymer electrolyte containing a polymer backbone and an IL species in the monomer repeat unit. PIL-based polymer electrolytes have high ionic conductivity, wide electrochemical windows, and high thermal stability.
Download or read book Supercapacitors written by Lionginas Liudvinavičius and published by BoD – Books on Demand. This book was released on 2018-06-27 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edited volume Supercapacitors: Theoretical and Practical Solutions is a collection of reviewed and relevant research chapters, offering a comprehensive overview of recent developments in the field of electronic devices and materials. The book comprises single chapters authored by various researchers and is edited by a group of experts. Each chapter is complete in itself but united under a common research study topic. This publication aims at providing a thorough overview of the latest research efforts by international authors on electronic devices and materials and opens new possible research paths for further novel developments.
Download or read book Flexible Supercapacitor Nanoarchitectonics written by Inamuddin and published by John Wiley & Sons. This book was released on 2021-06-29 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 21 chapters in this book presents a comprehensive overview of flexible supercapacitors using engineering nanoarchitectures mediated by functional nanomaterials and polymers as electrodes, electrolytes, and separators, etc. for advanced energy applications. The various aspects of flexible supercapacitors, including capacitor electrochemistry, evaluating parameters, operating conditions, characterization techniques, different types of electrodes, electrolytes, and flexible substrates are covered. This is probably the first book of its type which systematically describes the recent developments and progress in flexible supercapacitor technology, and will be very helpful for generating new and innovative ideas in the field of energy storage material for wearable/flexible industry applications.
Download or read book Ionic Liquids II written by Barbara Kirchner and published by Springer. This book was released on 2018-09-03 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series Topics in Current Chemistry Collections presents critical reviews from the journal Topics in Current Chemistry organized in topical volumes. The scope of coverage is all areas of chemical science including the interfaces with related disciplines such as biology, medicine and materials science. The goal of each thematic volume is to give the non-specialist reader, whether in academia or industry, a comprehensive insight into an area where new research is emerging which is of interest to a larger scientific audience. Each review within the volume critically surveys one aspect of that topic and places it within the context of the volume as a whole. The most significant developments of the last 5 to 10 years are presented using selected examples to illustrate the principles discussed. The coverage is not intended to be an exhaustive summary of the field or include large quantities of data, but should rather be conceptual, concentrating on the methodological thinking that will allow the non-specialist reader to understand the information presented. Contributions also offer an outlook on potential future developments in the field. The chapters “Ionic Liquid–Liquid Chromatography: A New General Purpose Separation Methodology”, “Proteins in Ionic Liquids: Current Status of Experiments and Simulations”, “Lewis Acidic Ionic Liquids” and "Quantum Chemical Modeling of Hydrogen Bonding in Ionic Liquids" are available open access under a Creative Commons Attribution 4.0 International License via link.springer.com.
Download or read book Supercapacitor Technology written by Inamuddin and published by Materials Research Forum LLC. This book was released on 2019-11-25 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supercapacitors are most interesting in the area of rechargeable battery based energy storage because they offer an unbeatable power density, quick charge/discharge rates and prolonged lifetimes in comparison to batteries. The book covers inorganic, organic and gel-polymer electrolytes, electrodes and separators used in different types of supercapacitors; with emphasis on material synthesis, characterization, fundamental electrochemical properties and most promising applications. Keywords: Supercapacitors, Rechargeable Batteries, Organic Electrolytes, Inorganic Electrolytes, Gel Polymer based Supercapacitors, Redox Electrolytes, Starch-Based Electrolytes, Flexible Supercapacitors, Pseudocapacitors, Carbon Nanoarchitectures for Supercapacitors, Photo-Supercapacitors, Bimetal Oxides/Sulfides for Electrochemical Supercapacitors.
Download or read book Thermal Effects in Supercapacitors written by Guoping Xiong and published by Springer. This book was released on 2015-06-30 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Brief reviews contemporary research conducted in university and industry laboratories on thermal management in electrochemical energy storage systems (capacitors and batteries) that have been widely used as power sources in many practical applications, such as automobiles, hybrid transport, renewable energy installations, power backup and electronic devices. Placing a particular emphasis on supercapacitors, the authors discuss how supercapacitors, or ultra capacitors, are complementing and replacing, batteries because of their faster power delivery, longer life cycle and higher coulombic efficiency, while providing higher energy density than conventional electrolytic capacitors. Recent advances in both macro- and micro capacitor technologies are covered. The work facilitates systematic understanding of thermal transport in such devices that can help develop better power management systems.
Download or read book Supercapacitors written by Francois Beguin and published by John Wiley & Sons. This book was released on 2013-04-02 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supercapacitors are a relatively new energy storage system that provides higher energy density than dielectric capacitors and higher power density than batteries. They are particularly suited to applications that require energy pulses during short periods of time, e.g., seconds or tens of seconds. They are recommended for automobiles, tramways, buses, cranes, fork-lifts, wind turbines, electricity load leveling in stationary and transportation systems, etc. Despite the technological maturity of supercapacitors, there is a lack of comprehensive literature on the topic. Many high performance materials have been developed and new scientific concepts have been introduced. Taking into account the commercial interest in these systems and the new scientific and technological developments now is the ideal time to publish this book, capturing all this new knowledge. The book starts by giving an introduction to the general principles of electrochemistry, the properties of electrochemical capacitors, and electrochemical characterization techniques. Electrical double layer capacitors and pseudocapacitors are then discussed, followed by the various electrolyte systems. Modelling, manufacture of industrial capacitors, constraints, testing, and reliability as well as applications are also covered. 'Supercapacitors - Materials, Systems, and Applications' is part of the series on Materials for Sustainable Energy and Development edited by Prof. G.Q. Max Lu. The series covers advances in materials science and innovation for renewable energy, clean use of fossil energy, and greenhouse gas mitigation and associated environmental technologies.
Download or read book Solid state NMR and Electrochemical Dilatometry Study of Charge Storage in Supercapacitor with Redox active Ionic Liquid Electrolyte written by Yanyu Wang and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Redox-active ionic liquids are emerging as promising new electrolytes for supercapacitors, providing higher capacitance and energy density than organic or ionic liquid electrolytes. Fundamental studies of the charge storage mechanism in supercapacitors are of critical importance for the development and application of devices. Solid-state NMR (SS-NMR) methodology having the ability to provide local environment information within electrodes at the molecular level has been recently developed to study the mechanism of charge storage in supercapacitors. The charge storage in supercapacitors with organic or ionic liquid electrolytes has been studied by SS-NMR. The charge storage in supercapacitors with redox-active species that involves faradaic processes is different from those of electrochemical double-layer capacitors comprising organic solvents or ionic liquids as electrolytes. However, there are until now no published findings on charge storage mechanisms in supercapacitors with redox-active electrolytes. Therefore, fundamental studies of the charge storage mechanism in supercapacitors with redox-active ionic liquid electrolytes are needed. In this thesis, SS-NMR techniques combined with electrochemical dilatometry were used to investigate in depth the charge storage in supercapacitors comprising redox-active ionic liquid electrolytes. The charge contributed from the faradaic reaction of the redox-active species is determined for the first time by the NMR measurements. Moreover, it is revealed that the charge storage mechanism of supercapacitors with the redox-active ionic liquid electrolyte EMIm FcNTf/ACN (1-ethyl-3-methylimidazolium ferrocenylsulfonyl (trifluoromethylsulfonyl) imide/acetonitrile) is driven by different charge regimes for different voltages. More specifically, charge storage on the positive electrode occurs via co-ion desorption in the low voltage range and subsequently counter-ion adsorption in the high voltage range, whereas charging on the negative electrode occurs exclusively by counter-ion adsorption over the studied voltage range. The electrochemical dilatometry measurements show macroscopic dimensional changes of the electrodes during charging, further confirming the proposed mechanism suggested by SS-NMR. The results give a detailed picture of the charge storage of supercapacitors with a redox-active ionic liquid electrolyte, providing new insights on the charge storage in supercapacitors.
Download or read book Ionic Liquids and Their Application in Green Chemistry written by Jamal Akhter Siddique and published by Elsevier. This book was released on 2023-07-20 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ionic liquids and Their Application in Green Chemistry covers the synthesis and characterization of a broad range of ionic liquids (ILs) and their polymers, along with their application in multiple areas for nanomaterials and environmental sustainability. The book provides reference material for future research in IL-based technologies for environmental and energy applications. It covers not only the conventional IL applications. but also advanced IL polymer-based materials and their application in energy storage and energy generator applications. Finally, the book discusses the major fields of application of IL-based materials in synthesis of nanomaterials and the role in graphene synthesis and its composites. Written by eminent scholars and leading experts from around the world, this book brings the literature up to date on the most recent progress in the field of IL based materials and their applications for the environmental sustainability. - Covers a broad area of applications, discussing the combination of materials and green chemistry, along with ILs - Provides complete information on the relationship between IL-based nanocomposites and their application in energy harvesting - Presents detailed case studies to help readers understand all the pros and cons of using these materials in their future research
Download or read book Science Technology and Advanced Application of Supercapacitors written by Takaya Sato and published by BoD – Books on Demand. This book was released on 2019-04-03 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Application fields of supercapacitors are expanding because they have a very large charge/discharge current density and a cycle durability of tens of thousands of cycles or more compared to secondary batteries. There are various kinds of supercapacitor: electric double layer capacitors with a relatively long history, pseudocapacitors that utilize electrochemical reactions, and the progress of hybrid capacitor technology that combines double layer capacity and electrochemical reactions. Development of electrode materials and electrolytes and new cell design for constructing devices support the performance improvement and expansion of new applied fields such as automobiles, heavy machinery, and energy harvesting. This book aims to provide engineers with the opportunity to review the latest information by integrating cutting-edge papers on science, technology, and the application of supercapacitors.
Download or read book Fundamentals of Ionic Liquids written by Douglas R. MacFarlane and published by John Wiley & Sons. This book was released on 2017-08-02 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by experts who have been part of this field since its beginnings in both research and academia, this textbook introduces readers to this evolving topic and the broad range of applications that are being explored. The book begins by examining what it is that defines ionic liquids and what sets them apart from other materials. Chapters describe the various types of ionic liquids and the different techniques used to synthesize them, as well as their properties and some of the methods used in their measurement. Further chapters delve into synthetic and electrochemical applications and their broad use as "Green" solvents. Final chapters examine important applications in a wide variety of contexts, including such devices as solar cells and batteries, electrochemistry, and biotechnology. The result is a must-have resource for any researcher beginning to work in this growing field, including senior undergraduates and postgraduates.
Download or read book Electrosorption written by Eliezer Gileadi and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: The gradual emergence during the last decade of the study of the mechanism of electrode reactions from the dark ages has given stimulus to a consideration of the double layer at metal-solution interfaces, which extends far outside the classical experimental studies of the capacitance of the mercury solution interface made during the 1950's by D. C. Grahame at Amherst College, Massachusetts. The central aspect of the study of an electrode reaction is the elucidation of its path and rate-determining step. Two fields are, however, prerequisites for such studies. First, it must be known what species are in the bulk of the solution, for these will seldom be simple ones such as H30~ and this study ("complex ions") has been made with both extent and depth. Second, the occupancy of the surface of the electrocatalyst and the associated field gradients must be known as a function of position in the double layer. Such "maps of the double layer" can be given with reasonable certainty up to concentrations of about 1 N for mercury in contact with solutions of inorganic ions. However, this is-or was until very recently-the extent of the know ledge. The problems confronting a fundamental approach to the rational development of, e.g., fuel cell catalysis were therefore considerable.
Download or read book Advanced Materials for Supercapacitors written by Wenyao Li and published by Frontiers Media SA. This book was released on 2020-07-28 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.
Download or read book Ionic Liquids written by Rasmus Fehrmann and published by Walter de Gruyter GmbH & Co KG. This book was released on 2019-05-20 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current book brings together the latest developments in the area of ionic liquids, including synthesis, purity control, toxicity, and scaling-up technologies. In addition, the authors explore the applications of ionic liquids in organic synthesis and catalysis, separation techniques and nanomaterials engineering. Written by key experts in the field, this book is an invaluable material for organic and green chemists in academia and industry.
Download or read book Development of Co assembly Methods for Improved Graphene ionic Liquid Supercapacitors written by Zimin She and published by . This book was released on 2017 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supercapacitors, also known as electric double-layer capacitors or ultracapacitors, store energy by rapid and reversible rearrangement of ions/charges at the electrolyte/electrode interface. This physical process results in various advantages, such as high power density and long lifespan. However, compared to batteries, supercapacitors still have significantly lower energy density. Currently, great efforts focus on pursuing the efficient combination of high specific surface area (SSA) electrodes and electrolytes with wide working voltage windows. Hence, graphene-based materials have attracted considerable interest due to their high electrical conductivity and theoretical SSA, they are promising candidates for electrochemical double-layer capacitors (EDLCs) as next-generation energy storage devices. The objective of this work is to develop new electrode fabrication methods to improve the performance of reduced graphene oxide (rGO) based supercapacitors. Since specific capacitance is proportional to the SSA, the main challenge for rGO based supercapacitors is to effectively prevent rGO sheets from restacking when processed into a dense, thick electrode. In the first part, a hydrophobic ionic liquid (IL), 1-ethyl-3-methylimidazolum bis(trifluoromethyl-sulfonyl)imide (EMImTFSI), is used as both electrolyte and spacer to separate the graphene sheets and maintain its high SSA. It is demonstrated that EMImTFSI has better chemical stability than 1-ethyl-3-methylimidazolium tetrafluoroborate (EMImBF4), which was used in our previous work, and reduces the corrosion of commonly used current collectors (e.g. Al, Cu). To imbibe IL prior to thermal reduction, a graphene oxide/IL dispersion was used to assembly gel-like laminated nanocomposite on common metal current collectors. To balance the loss of IL and the reduction of GO, GO/IL electrodes were reduced by ramping up from room temperature to 360 °C at 5 °C/min followed by rapid cooling. The resulting conductive films containing 80 wt% of EMImTFSI displayed a good gravimetric capacitance of 135 F/g at 5 mV/s. The above work did not take advantage of any specific interactions between the IL and GO and thus some restacking likely occurred and limited the IL-accessible surface area. Therefore, the second half of this thesis focuses on engineering specific interactions between the GO and EMImTFSI to enable a more uniform distribution of IL among the network of GO sheets. This was achieved through an EMImTFSI aqueous microemulsion formed by the addition of the surfactant, Tween 20. Under a water rich condition (> 70 wt% water), this system became an IL-in-water microemulsion and displayed an average surfactant-stabilized IL droplet size of ~8 nm. In order to observe the interaction between microemusion nanodroplets and GO sheets, the fluorescence response arising from Tween 20 and rhodamine-b were used to probe adsorption through fluorescence quenching. A significant decrease in fluorescence intensity in the presence of GO indicated the spontaneous adsorption of stabilized IL onto the GO surface - likely via hydrogen bonding. Finally, this GO dispersion with uniformly adsorbed IL-containing microemulsion nanodroples was drop-casted onto Cu foil. The precursor electrode was reduced at 300 °C to release IL and remove Tween 20 leading to a dense and conductive layered rGO/IL film (0.76 g/cm3 of rGO), which exhibited record high gravimetric (302 F/g) and volumetric capacitance (218 F/cm3). These results constitute the best performance of a graphene-based high voltage supercapacitor reported to date.
Download or read book Nanotechnology for Energy Sustainability written by Baldev Raj and published by John Wiley & Sons. This book was released on 2017-01-27 with total page 1487 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dieses Referenzwerk in drei handlichen Bänden bietet einen detaillierten Überblick über Anwendungen der Nanotechnologie im Bereich Nachhaltigkeit in der Energieversorgung. Der erste Band dieses klar strukturierten Nachschlagewerks behandelt nach der Einleitung die Themen Energieerzeugung, erneuerbare Energien, Energiespeicherung, Energieverteilung sowie Energieumwandlung und Energy-Harvesting. Im zweiten Band werden auf Nanotechnologie basierte Materialen, Energieeinsparung und -management, technologische und urheberrechtlich relevante Fragen, Märkte und Umweltsanierung erörtert. Der dritte Band wirft einen Blick in die Zukunft, auf technologische Fortschritte und gibt Empfehlungen. Ein wichtiges Handbuch für alle Experten auf diesem Gebiet, von Forschern und Ingenieuren im wissenschaftlichen Bereich bis hin zu Entwicklern in der Industrie.
Download or read book Supercapacitors for the Next Generation written by Daisuke Tashima and published by BoD – Books on Demand. This book was released on 2022-03-09 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supercapacitors are presently applied in various devices and have the potential to be used in many fields in the future. For example, the use of supercapacitors is currently limited not only to automobiles, buses, and trucks, which have been electrified recently, but also to railways and aircraft. We believe that these devices are the most suitable physical batteries for absorbing regenerative energy produced during motor regeneration; thus, further research and development in this direction is expected in the future.
