Supercapacitors

The first model for the distribution of ions near the surface of a metal electrode was devised by Helmholtz in 1874. He envisaged two parallel sheets of charges of opposite sign located one on the metal surface and the other on the solution side, a few nanometers away, exactly as in the case of a parallel plate capacitor. The rigidity of such a model was allowed for by Gouy and Chapman inde pendently, by considering that ions in solution are subject to thermal motion so that their distribution from the metal surface turns out diffuse. Stern recognized that ions in solution do not behave as point charges as in the Gouy-Chapman treatment, and let the center of the ion charges reside at some distance from the metal surface while the distribution was still governed by the Gouy-Chapman view. Finally, in 1947, D. C. Grahame transferred the knowledge of the struc ture of electrolyte solutions into the model of a metal/solution interface, by en visaging different planes of closest approach to the electrode surface depending on whether an ion is solvated or interacts directly with the solid wall. Thus, the Gouy-Chapman-Stern-Grahame model of the so-called electrical double layer was born, a model that is still qualitatively accepted, although theoreti cians have introduced a number of new parameters of which people were not aware 50 years ago.

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.

Although recognized as an important component of all energy storage and conversion technologies, electrochemical supercapacitators (ES) still face development challenges in order to reach their full potential. A thorough examination of development in the technology during the past decade, Electrochemical Supercapacitors for Energy Storage and Delivery: Fundamentals and Applications provides a comprehensive introduction to the ES from technical and practical aspects and crystallization of the technology, detailing the basics of ES as well as its components and characterization techniques. The book illuminates the practical aspects of understanding and applying the technology within the industry and provides sufficient technical detail of newer materials being developed by experts in the field which may surface in the future. The book discusses the technical challenges and the practical limitations and their associated parameters in ES technology. It also covers the structure and options for device packaging and materials choices such as electrode materials, electrolyte, current collector, and sealants based on comparison of available data. Supplying an in depth understanding of the components, design, and characterization of electrochemical supercapacitors, the book has wide-ranging appeal to industry experts and those new to the field. It can be used as a reference to apply to current work and a resource to foster ideas for new devices that will further the technology as it becomes a larger part of main stream energy storage.

Materials for Supercapacitor Applications provides a snapshot of the present status of this rapidly growing field. It covers motivations, innovations, ongoing breakthroughs in research and development, innovative materials, impacts, and perspectives, as well as the challenges and technical barriers to identifying an ideal material for practical applications. This comprehensive reference by electro-chemists explains concepts in materials selection and their unique applications based on their electro-chemical properties. Chemists, chemical and electrical engineers, material scientists, and research scholars and students interested in energy will benefit from this overview of many important reference points in understanding the materials used in supercapacitors. Provides an overview of the formulation for new materials and how to characterize them for supercapacitor applications Describes all the information on the available materials for supercapacitor applications Outlines potential material characterization methods Discusses perspectives and future directions of the field

Supercapacitors: Materials, Design, and Commercialization provides a comprehensive overview of the latest research trends and opportunities in supercapacitors, and particularly in terms of novel materials and electrolytes.The book will address the transformation in supercapacitive technology from double layer capacitance to battery-type capacitance, providing a clear understanding of the conceptual differences between various charge storage processes for supercapacitors, charge storage based on materials and electrolytes, and calculation for capacitance for these charge processes. Detailed chapters discuss recent developments in materials, such as carbons, chalcogenides, MXene and phosphorene, various polymer nanocomposites, and polyoxometalates for supercapacitors. This is followed by in-depth coverage of electrolytes, including the evolution of electrolytes from aqueous to water-in-salt electrolytes and their role in improving the energy density of supercapacitors. The final part of the book examines the role of artificial intelligence in the design of supercapacitors, and latest developments in translating novel supercapacitor technologies from laboratory-scale research to a commercialization.This is a valuable resource for advanced students, researchers, and scientists in the fields of energy storage, electrical engineering, materials science, and chemical engineering, as well as engineers and R&D personnel working with supercapacitors or energy storage in an industrial setting. Brings together the latest developments in supercapacitor materials and electrolytes Discusses cutting-edge charge storage concepts and methods for supercapacitors Addresses the role of machine learning and the scale-up from laboratory to commercialization

Smart Supercapacitors: Fundamentals, Structures and Applications presents current research and technology surrounding smart supercapacitors, also exploring their rapidly emerging characteristics and future potential advancements. The book begins by describing the basics and fundamentals related to supercapacitors and their applicability as smart and next generation energy storing devices. Subsequent sections discuss electrode materials, their fabrication, specific designing techniques, and a review of the application and commercialization of this technology. This book will appeal to researchers and engineers from both academia and industry, making it a vital resource to help them revolutionize modern supercapacitors. Explores the potential applications of supercapacitors Covers the entire spectrum of new advances and recent trends on research in supercapacitors Explains reliability, safety, economics and market trends surrounding the use of supercapacitors from a sustainable perspective

FLEXIBLE SUPERCAPACITORS Comprehensive coverage of the latest advancements in flexible supercapacitors In Flexible Supercapacitors: Materials and Applications, a team of distinguished researchers deliver a comprehensive and insightful exploration of the foundational principles and real-world applications of flexible supercapacitors. This edited volume includes contributions from leading scientists working in the field of flexible supercapacitors. The book systematically summarizes the most recent research in the area, and covers fundamental concepts of electrode materials and devices, including on-chip microsupercapacitors and fiber supercapacitors. The latest progress and advancements in stretchable supercapacitors and healable supercapacitors are also discussed, as are problems and challenges commonly encountered in the development of flexible supercapacitors. The book concludes with suggestions and fresh perspectives on future research in this rapidly developing field. Flexible Supercapacitors: Materials and Applications also offers: A thorough introduction to the fundamentals of supercapacitors, including their materials and devices Comprehensive explorations of flexible fiber supercapacitors and two-dimensional materials for flexible supercapacitors In-depth examinations of flexible supercapacitors with metal oxides-based electrodes and flexible on-chip microsupercapacitors Practical discussions of stretchable and healable supercapacitors, as well as patterned nanostructured electrodes Perfect for researchers in the fields of materials science, physics, and electrical engineering, Flexible Supercapacitors: Materials and Applications is also an ideal reference for developers interested in supercapacitor design, materials, and devices.

BIOMASS-BASED SUPERCAPACITORS Authoritative resource addressing the fundamentals, design, manufacturing, and industrial applications of supercapacitors based on biomass Biomass-Based Supercapacitors presents a systematic overview and recent developments in the research, design, and fabrication of supercapacitors using biomass, discussing fundamentals, advancements, industrial applications, and the manufacturing process of biomass-derived supercapacitors. The text also considers environmental and economic aspects of the technology, along with biomass-based supercapacitors in the context of circular economy. Written by a team of international experts in the field of supercapacitors, Biomass-Based Supercapacitors covers sample topics such as: Basic foundational knowledge surrounding supercapacitors, electrochemical techniques for supercapacitors, and different types of supercapacitors Biomass derived electrode materials for supercapacitors, such as activated and non-activated carbon, carbon from pretreated biomass, carbonate salts-activated carbon, and more Electrolytes, separators, and packaging materials for supercapacitors using biomass and binding materials from biomass for supercapacitors Future outlooks and challenges for the development of biomass-based supercapacitors, from the lab to practical applications in industry Biomass-Based Supercapacitors is an excellent resource for academic researchers and industrial scientists working in the areas of supercapacitor fabrication, energy materials and energy storage devices, electrochemistry, materials science, biomass conversion, green chemistry, and sustainability.