Elektrokemi og magnetokemi

Bogens emner er grundlaget for termodynamikken, kemiske reaktioner i ligevægt, fasediagrammer og elektrokemi. Begrebet affinitet er tillagt en central rolle gennem hele fremstillingen. Bogen giver en mere dybtgående indføring til faget end det gængse undervisningsmateriale.

This thesis describes in-depth theoretical efforts to understand the reaction mechanism of graphite and lithium metal as anodes for next-generation rechargeable batteries. The first part deals with Na intercalation chemistry in graphite, whose understanding is crucial for utilizing graphite as an anode for Na-ion batteries. The author demonstrates that Na ion intercalation in graphite is thermodynamically unstable because of the unfavorable Na-graphene interaction. To address this issue, the inclusion of screening moieties, such as solvents, is suggested and proven to enable reversible Na-solvent cointercalation in graphite. Furthermore, the author provides the correlation between the intercalation behavior and the properties of solvents, suggesting a general strategy to tailor the electrochemical intercalation chemistry. The second part addresses the Li dendrite growth issue, which is preventing practical application of Li metal anodes. A continuum mechanics study considering various experimental conditions reveals the origins of irregular growth of Li metal. The findings provide crucial clues for developing effective counter strategies to control the Li metal growth, which will advance the application of high-energy-density Li metal anodes.

This book provides an overview of functional membranes for efficient ion/molecule transfer and separation. It first presents the design, fabrication, structure, and performance of several kinds of membranes. Then, the application of membrane technology in organic solvent nanofiltration, hydrogen fuel cells, and solid-state lithium batteries is introduced. Furthermore, the book proposes strategies of strengthening the ion/molecular-level separation and transfer process in membrane processes. It also analyzes the development status, existing problems, and optimization methods in the field of membranes and membrane processes. Finally, it highlights the construction strategy of membrane structures, the structure¿performance relationships as well as the transfer and separation mechanisms. The target group of this book is academics and researchers in materials science, chemical engineering, biomedical engineering, and other related fields.

This book provides a description of material characterization and mechanisms of secondary batteries during discharge, cycle, and storage process. It also proposes a new intercalation/de-intercalation theory and presents the mechanism of ionic conduction. In addition, through the comparative study of variation laws of battery performance and of fine structure and microstructure parameters, the mechanism of cycle and storage processes and battery performance decay are investigated. Given its scope, the book appeals to a broad readership, particularly professionals at universities and scientific research institutes.

This book provides a comprehensive platform for the research, scientific and educational communities working on electrocatalysis. It covers water electrolysis from different fields of catalysis research, deals with the fundamentals and critically discusses the precise and correct use of evaluating parameters and their calculation for a fair evaluation. Readers find an analysis to probe the origin of different bottlenecks in water electrolysis and scientific methods to enhance the electrode selectivity with high intrinsic activity, effective mass and electron transfer ability, abundant active sites with super hydrophilicity-aerophobicity characteristics and structural, mechanical and chemical stability with high corrosion resistance.

This book addresses novel C(sp3)-C(sp2) and C(sp3)-heteroatom bond-forming reactions. Two strategies are given in the book using photoredox or electrochemical methods. The first strategy describes that the hydroalkylation of alkynes via photoredox-mediated Ni/Ir dual catalysis produces trisubstituted alkenes as versatile synthetic building blocks for the synthesis of pharmaceutical agents and natural products. High regioselectivity and E/Z-selectivity were achieved by introducing silyl groups that can provide steric and electronic effects to these selectivities with extensive opportunities for post-functionalization.The second strategy enables the development of C(sp3)-heteroatom bond-forming reactions through the electrochemical activation of C(sp3)-B bonds. The bonding of heteroatoms to carbon atoms has been an enduring subject of investigation for organic chemists. The function of most molecules is mainly determined by heteroatoms attached to the carbon atom, although the backbone structure of organic compounds comprises carbon fragments.

This book provides an overview of pseudocapacitive materials, including their fundamentals, synthetic methods, architectural enhancements to boost their properties, and emerging materials. It covers numerous strategies to enhance their performance, such as altering morphology, doping, introducing multivalent ions, designing devices, and utilizing emerging pseudocapacitive materials. The book also delves into fundamental approaches for fine-tuning the properties of pseudocapacitive materials and explores their applications in energy storage devices, with a specific focus on emerging pseudocapacitive materials and their utilization in energy storage devices.

This book offers a comprehensive analysis of novel design strategies in higher energy solid-state lithium batteries.  It describes synthesis and experimental techniques to characterize the physical, chemical and electrochemical properties of the electrode and electrolytes. The book reports on electrochemical measurements of conductivity and related parameters in solid electrolytes and its interfaces. It also presents various technologies that have been used for the fabrication of all-solid-state lithium-ion batteries such as thin-film, 3D printing (additive manufacturing) and atomic layer deposition. A large part of the text focus on the description on the complete functioning and challenges with the electrochemistry of the electrodes and solid electrolyte interfaces. The book also supplies valuable insight into potential growth opportunities in this exciting market and cost-effective design tactics in solid-state assemblies.  

This book addresses the comprehensive understanding of Ni-rich layered oxide of lithium-ion batteries cathodes materials, especially focusing on the effect of dopant on the intrinsic and extrinsic effect to its host materials. This book can be divided into three parts, that is, 1. overall understanding of layered oxide system, 2. intrinsic effect of dopant on layered oxides, and 3. extrinsic effect of dopant on layered oxides. To truly understand and discover the fundamental solution (e.g. doping) to improve the Ni-rich layered oxides cathodic performance, understanding the foundation of layered oxide degradation mechanism is the key, thus, the first chapter focuses on discovering the true degradation mechanisms of layered oxides systems. Then, the second and third chapter deals with the effect of dopant on alleviating the fundamental degradation mechanism of Ni-rich layered oxides, which we believe is the first insight ever been provided. The content described in this book will provide research insight to develop high-performance Ni-rich layered oxide cathode materials and serve as a guide for those who study energy storage systems.

This book focuses on the development of high-performance carbon electrodes for sodium ion batteries (SIBs). By proposing folded-graphene as the high-density cathode with excellent rate capability, it provides insight into the interplay between oxygen functional groups and folded texture. It also highlights the superiority of ether electrolytes matching with carbon anodes, which are shown to deliver largely improved electrochemical performance. The achievements presented offer a valuable contribution to the carbon-based electrodes in SIBs.

This book introduces the synthesis of functional mesoporous carbon-based films and their applications in energy systems. In the last decades, the consumption of fossil fuels has led to many problems such as the energy crisis and climate change. The rapidly increasing energy demands and environmental issues have attracted lots of attention to develop new functional materials for sustainable energy technology. Mesoporous carbon-based films show unique properties and have been regarded as a promising material applied in highly efficient energy storage and conversion systems. Interfacial assembly strategies are usually employed to construct such film devices. In this book, recent developments in synthesis of mesoporous carbon-based film devices through interfacial assembly strategies are illustrated. Additionally, the applications of mesoporous carbon-based film devices for electrochemical energy systems including batteries and electrocatalysis are introduced to demonstrate their potential, as well as describing the mechanisms to enhance the performance of these systems. Finally, some challenges and future outlooks are presented to inspire better development and contributions to this field in coming years. Given its scope, this book appeals to undergraduate students, graduate students, engineers, and researchers involved in related fields.

This contributed volume provides a critical review of research in the field of Electrochemical Promotion of Catalysis (EPOC). It presents recent developments during the past decade that have led to a better understanding of the field and towards applications of the EPOC concept. The chapters focus on the implementation of EPOC for developing sinter-resistant catalysts, catalysts for hydrogen production, ammonia production and carbon dioxide valorization. The book also highlights the developments towards electropromoted dispersed catalysts and for self-sustained electrochemical promotion which are currently expanding. This authoritative analysis of EPOC is useful for various scientific communities working at the interface of heterogeneous catalysis, solid state electrochemistry and materials science. It is of particular interest to groups whose research focuses on developments towards a better and more sustainable future.

This book presents a collection of chapters on modern bioelectrochemistry, showing different aspects of emerging techniques and materials, biodevice design and reactions. The chapters provide relevant bibliographic information for researchers and students interested in electrochemical impedance spectroscopy applied in biodevices, trends, and validation on impedimetric immunosensors in the application of routine analysis, electrochemical-surface plasmon bioanalytics and carbon nanomaterials in electrochemical biodevices, insights on inorganic complexes and metal based for biomarkers sensors, bioelectrodes and cascade reactions and field effect-based reactions.

This Ph.D. book develops nanowire-assisted electroporation disinfection technology based on the flow-through porous electrode. The author presents pioneering results on theoretical modeling, experimental realization, and selected applications, showing the novel disinfection mechanism of electroporation guarantees an exceedingly low level of energy consumption. In this regard, three classes of novel dynamic behavior are investigated: (i) The developed nanowire-assisted flow-through electroporation disinfection technology enables great microbial disinfection performance with extremely low voltage (1V), which significantly reduce the formation potential of harmful disinfection by-products during the treatment process. (ii) The nanowire-assisted flow-through electroporation disinfection technology ensures no reactivation/regrowth of inactivated bacteria and meanwhile promotes the gradual death of damaged bacteria during the storage process. (iii) The application of high-frequency AC power supply (106 Hz) ensures the high microbial disinfection efficiency while suppressing the occurrence of electrochemical reactions and extending the electrode lifetime effectively.

This book discusses generalized applications of energy storage systems using experimental, numerical, analytical, and optimization approaches. The book includes novel and hybrid optimization techniques developed for energy storage systems. It provides a range of applications of energy storage systems on a single platform. The book broadly covers-thermal management of electronic components in portable electronic devices; modeling and optimization aspects of energy storage systems; management of power generation systems involving renewable energy; testing, evaluation, and life cycle assessment of energy storage systems, etc. This book will serve as a reference resource for researchers and practitioners in academia and industry.

The battery management system (BMS) optimizes the efficiency of batteries under allowable conditions and prevents serious failure modes. This book focuses on critical BMS techniques, such as battery modeling; estimation methods for state of charge, state of power and state of health; battery charging strategies; active and passive balancing methods; and thermal management strategies during the entire lifecycle. It also introduces functional safety and security-related design for BMS, and discusses potential future technologies, like digital twin technology.

This book describes improvements to the electronics topology of current modular reconfigurable storages by integrating parallel connectivity, reducing the semiconductor count by eliminating irrelevant states, and improving the monitoring techniques through higher function integration. The author also discusses each topology's main advantages and disadvantages at the micro and macro levels. Moreover, the presented modeling of modular reconfigurable storage systems with different storages helps in better understanding the dynamics of the system.The book establishes novel optimum or near-optimum methods for exploiting the DOF (degrees of freedom) to achieve higher efficiency, more function integration, better balancing, or output quality. Additionally, through a detailed analysis of different modulation techniques, this book presents novel modulation methods, enhances the state-of-the-art, or in some cases, simplifies the complexity of implementation.The concept of interconnected multi-port systems through integrating novel modulation techniques and the acquired understanding of the behavior of modular dynamically reconfigurable storages is explained. The presented concepts can significantly reduce the number of energy conversion stages as well as the final footprint of the system, reduce the number of required controlled semiconductors, and save costs. It also presents novel monitoring techniques based on estimators that can significantly reduce the number of required sensors and the required data-communication bandwidth.

Ion exchange refers to a reversible chemical reaction in which an ion attached to an immobile solid particle is exchanged for a similarly charged ion from a wastewater solution. It is a method of purifying aqueous solutions utilizing solid polymeric ion-exchange resin. Apart from its use in purification of drinking water, this technology is broadly used for the separation of a wide range of medicinally and industrially significant chemicals. Various industries that are dependent on the ion exchange technology comprise power, pharmaceutical, chemical processing, nuclear mining, food and waste water processing industries. This book is a compilation of chapters that discuss the most vital concepts and emerging trends related to ion exchange technology. From theories to research to practical applications, studies related to all contemporary topics of relevance to this subject have been included herein. Those in search of information to further their knowledge will be greatly assisted by this book.

Electroplating is an electrodeposition process that involves coating a surface with a metal by means of an electric current. Several materials are used for electroplating including copper, nickel, gold, silver and zinc. This process is used to create elements that conduct a larger current such as a micro electrical coil. Electroplating can be applied to deposit relatively thick films of magnetic material to create a larger magnetic force. This mechanism is commonly used in magnetic separation or magnetic force-based actuators. Electroplating can be classified into several types depending on the materials used such as copper plating, silver plating, zinc plating and gold plating. Copper plating is extensively used to prevent case hardening of steel on specified parts. Silver plating is done on tableware, engine bearings and electrical contacts. The most prominent use of gold plating is on jewelry and watch cases. The corrosion of steel articles can be prevented by zinc coatings. The objective of this book is to give a general view of electroplating and its applications. It will provide comprehensive knowledge to all the readers.

This book provides a systematic and comprehensive introduction to the fundamentals of hydrogen energy, hydrogen energy-related technologies and systems, and the environmental and economic impacts of hydrogen energy. This book is rich in content, combining theory with practice and reflecting the latest world achievements in hydrogen energy utilization and research. It is used by a wide range of scientific and technologists engaged in the development and utilization of hydrogen energy and other energy sources. It is also referenced for technical workers in power engineering, aerospace, chemistry, chemical engineering, refrigeration, metallurgy, and those engaged in safety management, as well as for teachers and students of related disciplines in higher education institutions. Furthermore, this book makes some modest contribution to the development of hydrogen energy by strengthening the hydrogen energy research teams.

This book provides a detailed description of hydrogen production through water electrolysis. It starts with the theoretical description of the chemical, thermodynamic, and kinetic issues related to the electrolysis of water. The main available technologies and the ones under development are detailed from a technical and a scientific point of view. At the end of the book Dr. Cavaliere describes the main hydrogen applications and their contribution to the grand energy transition that is expected by the middle of the century. The book also examines the economic issues related to the transition toward the hydrogen society.

This book provides recent development in thin-film solar cells (TFSC). TFSC have proven the promising approach for terrestrial and space photovoltaics. TFSC have the potential to change the device design and produce high efficiency devices on rigid/flexible substrates with significantly low manufacturing cost. TFSC have several advantages in manufacturing compared to traditional crystalline Si-solar cells like less requirement of materials, can be prepared with earth's abundant materials, less processing steps, easy to dispose, etc. Several universities/research institutes/industry in India and abroad are involved in the research area of thin-film solar cells. The book helps the readers to find the details about different thin-film technologies and its advancement at one place. Each chapter covers properties of materials, its suitability for PV applications, simple manufacturing processes and recent and past literature survey. The issues related to the development of high efficiency TFSC devices over large area and its commercial and future prospects are discussed.

This book is a state-of-the-art review on recent advances in flow cells for electrochemical energy systems. The book includes an introduction to flow cells, proton exchange membrane fuel cells, photocatalytic fuel cells, organic flow batteries, redox flow batteries, microfluidic flow cells, as well as electrolysis cells for CO2 and nitrogen reduction. The book provides an essential reference for professors, researchers, and policymakers globally in academia, industry, and government.

This book systematically summarizes the advanced development of carbon-based nanomaterials for electrochemical catalysis, and it is comprised of four sections. The first section discusses about the fundamental synthesis, characterization techniques, and catalytic effects on the energy conversion and storage mechanism. The second section elaborately reviews various types of electrocatalytic reactions on carbon-based materials and their performance. The third section focuses on batteries about carbon-based materials with different storage mechanism. And the last one, the following enlightenment in terms of theoretical development and experimental research is provided to the general readers: 1) Precise design and construction of local atomic and electronic structures at the interface of catalysts; 2) Selective activation and directed conversion of carbon-based energy-carrying molecules at the interface; 3) Interaction mechanism and regulation of catalyst solid surface interface properties under environment and external field. This book will be useful for researchers and students who are interested in carbon-based nanomaterials, electrochemical catalysts and energy storage.

This Faraday Discussion Volume brings together synthetic chemists, physical chemists, material scientists, electrochemists, computational scientists and engineers to harness the transformative knowledge required to develop organic electrosynthesis.

This book covers the current, state-of-the-art knowledge, fundamental mechanisms, design strategies, and future challenges in electrochemical energy storage devices using polymeric materials. It looks into the fundamentals and working principles of electrochemical energy devices such as supercapacitors and batteries and explores new approaches for the synthesis of polymeric materials and their composites to broaden the vision for researchers to explore advanced materials for electrochemical energy applications. All the chapters are written by leading experts in these areas making it suitable as a reference for students as well as provide new directions to researchers and scientists working in polymers, energy, and nanotechnology.

This monograph overviews the importance of electrochemistry in the field of cultural heritage, including archaeology, conservation and restoration topics. The application of electrochemical techniques in these domains have experienced a notable growth during the last ten years, in particular with regards to the elucidation of composition, manufacturing techniques and chronology of archaeological artefacts. This book describes the application of solid state electrochemistry techniques for the use of samples at the nanogram level from paintings, metallic, ceramic, glass, glazed, wooden, and other objects, and it also includes the description of new dating procedures for archaeological objects made of these materials. It is a valuable contribution to the field of cultural heritage and will be of great interest to archaeologists, conservators and restorers as well as to physicists and chemists working on the scientific examination of works of art.