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Author : Yongzhu Fu
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (166 download)
Download or read book Development of New Membranes Based on Aromatic Polymers and Heterocycles for Fuel Cells written by Yongzhu Fu and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Wen Li
Publisher :
ISBN 13 :
Total Pages : 304 pages
Book Rating : 4.:/5 (457 download)
Download or read book Development and Understanding of New Membranes Based on Aromatic Polymers and Heterocycles for Fuel Cells written by Wen Li and published by . This book was released on 2009 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Direct methanol fuel cells (DMFC) are appealing as a power source for portable devices as they do not require recharging with an electrical outlet. However, the DMFC technology is confronted with the high crossover of methanol fuel from the anode to the cathode through the currently used Nafion membrane, which not only wastes the fuel but also poisons the cathode platinum catalyst. With an aim to overcome the problems encountered with the Nafion membrane, this dissertation focuses on the design and development of new polymeric membrane materials for DMFC and a fundamental understanding of their structure-property-performance relationships. Several polymeric blend membranes based on acid-base interactions between an aromatic acidic polymer such as sulfonated ploy(ether ether ketone) (SPEEK) and an aromatic basic polymer such as heterocycle tethered poly(sulfone) (PSf) have been explored. Various heterochylces like nitro-benzimidazole (NBIm), 1H-Perimidine (PImd), and 5-amino-benzotriazole (BTraz) have been tethered to PSf to understand the influence of pKa values and the size of the hetrocycles. The blend membranes show lower methanol crossover and better performance in DMFC than plain SPEEK due to an enhancement in proton conductivity through acid-base interactions and an insertion of the heterocycle side groups into the ionic clusters of SPEEK as indicated by small angle Xray scattering and TEM data. The SPEEK/PSf-PImd blend membrane shows the lowest methanol crossover due to the larger size of the side groups, while the SPEEK/PSf-BTraz blend membrane shows the highest proton conductivity and maximum power density. To further investigate the methanol-blocking effect of the heterocycles, N, N'-Bis- (1H-benzimidazol-2-yl)-isophthalamide (BBImIP) having two amino-benzimidazole groups bonded to a phenyl ring has been incorporated into sulfonated polysulfone (SPSf) and SPEEK membranes. With two 2-amino-benzimidazole groups, which could greatly increase the proton transfer sites, and three phenyl rings, which are compatible with the aromatic polymers, the BBImIP/SPSf and BBImIP/SPEEK blend membranes show suppressed methanol crossover and increased fuel cell performance in DMFC. Novel sulfonated copolymers based on poly(aryl ether sulfone) (SPS-DP) that exhibit low methanol crossover have been synthesized and explored as a methanol-barrier center layer in a multilayer membrane configuration having SPEEK as the outer layers. These multilayer membranes exhibit better performance in DMFC than plain SPEEK and Nafion 115 membranes due to suppressed methanol crossover. To address the issue of incompatibility between the new hydrocarbon-based membranes synthesized and the Nafion ionomer used in the catalyst layer in fabricating membrane-electrode assemblies (MEAs), the MEAs have been fabricated with the SPEEK membranes and 10 to 30 % SPEEK ionomer in the catalyst layer. These MEAs exhibit better performance in DMFC compared to the MEAs fabricated with the SPEEK membranes and Nafion ionomer in the catalyst layer due to lower interfacial resistance.
Author : Javaid Zaidi
Publisher : Springer Science & Business Media
ISBN 13 : 0387735321
Total Pages : 439 pages
Book Rating : 4.3/5 (877 download)
Download or read book Polymer Membranes for Fuel Cells written by Javaid Zaidi and published by Springer Science & Business Media. This book was released on 2010-07-15 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the late-1960’s, perfluorosulfonic acid (PFSAs) ionomers have dominated the PEM fuel cell industry as the membrane material of choice. The “gold standard’ amongst the many variations that exist today has been, and to a great extent still is, DuPont’s Nafion® family of materials. However, there is significant concern in the industry that these materials will not meet the cost, performance, and durability requirementsnecessary to drive commercialization in key market segments – es- cially automotive. Indeed, Honda has already put fuel cell vehicles in the hands of real end users that have home-grown fuel cell stack technology incorporating hydrocarbon-based ionomers. “Polymer Membranes in Fuel Cells” takes an in-depth look at the new chem- tries and membrane technologies that have been developed over the years to address the concerns associated with the materials currently in use. Unlike the PFSAs, which were originally developed for the chlor-alkali industry, the more recent hydrocarbon and composite materials have been developed to meet the specific requirements of PEM Fuel Cells. Having said this, most of the work has been based on derivatives of known polymers, such as poly(ether-ether ketones), to ensure that the critical requirement of low cost is met. More aggressive operational requi- ments have also spurred the development on new materials; for example, the need for operation at higher temperature under low relative humidity has spawned the creation of a plethora of new polymers with potential application in PEM Fuel Cells.
Author : Surbhi Sharma
Publisher : Walter de Gruyter GmbH & Co KG
ISBN 13 : 311064732X
Total Pages : 172 pages
Book Rating : 4.1/5 (16 download)
Download or read book Membranes for Low Temperature Fuel Cells written by Surbhi Sharma and published by Walter de Gruyter GmbH & Co KG. This book was released on 2019-06-04 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Membranes for Low Temperature Fuel Cells provides a comprehensive review of novel and state-of-the-art polymer electrolyte membrane fuel cells (PEMFC) membranes. The author highlights requirements and considerations for a membrane as an integral part of PEMFC and its interactions with other components. It is an indispensible resource for anyone interested in new PEMFC membrane materials and concerned with the development, optimisation and testing of such membranes. Various composite membranes (polymer and non-polymer) are discussed along with analyses of the latest fi ller materials like graphene, ionic liquids, polymeric ionic liquids, nanostructured metal oxides and membrane concepts unfolding in the field of PEMFC. This book provides the latest academic and technical developments in PEMFC membranes with thorough insights into various preparation, characterisation, and testing methods utilised. Factors affecting proton conduction, water adsorption, and transportation behaviour of membranes are also deliberated upon. Provides the latest academic and technical developments in PEMFC membranes. Reviews recent literature on ex situ studies and in situ single-cell and stack tests investigating the durability (chemical, thermomechanical) and degradation of membranes. Surbhi Sharma, MSc, PhD Working on graphene oxide and fuel cells since 2007, she has published about 50 research articles/book chapters and holds a patent. She has also been awarded various research grants.
Author : Javaid Zaidi
Publisher : Springer
ISBN 13 : 9780387566498
Total Pages : 550 pages
Book Rating : 4.5/5 (664 download)
Download or read book Polymer Membranes for Fuel Cells written by Javaid Zaidi and published by Springer. This book was released on 2010-11-16 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the late-1960’s, perfluorosulfonic acid (PFSAs) ionomers have dominated the PEM fuel cell industry as the membrane material of choice. The “gold standard’ amongst the many variations that exist today has been, and to a great extent still is, DuPont’s Nafion® family of materials. However, there is significant concern in the industry that these materials will not meet the cost, performance, and durability requirementsnecessary to drive commercialization in key market segments – es- cially automotive. Indeed, Honda has already put fuel cell vehicles in the hands of real end users that have home-grown fuel cell stack technology incorporating hydrocarbon-based ionomers. “Polymer Membranes in Fuel Cells” takes an in-depth look at the new chem- tries and membrane technologies that have been developed over the years to address the concerns associated with the materials currently in use. Unlike the PFSAs, which were originally developed for the chlor-alkali industry, the more recent hydrocarbon and composite materials have been developed to meet the specific requirements of PEM Fuel Cells. Having said this, most of the work has been based on derivatives of known polymers, such as poly(ether-ether ketones), to ensure that the critical requirement of low cost is met. More aggressive operational requi- ments have also spurred the development on new materials; for example, the need for operation at higher temperature under low relative humidity has spawned the creation of a plethora of new polymers with potential application in PEM Fuel Cells.
Author : Hongting Pu
Publisher : John Wiley & Sons
ISBN 13 : 1118869281
Total Pages : 430 pages
Book Rating : 4.1/5 (188 download)
Download or read book Polymers for PEM Fuel Cells written by Hongting Pu and published by John Wiley & Sons. This book was released on 2014-10-01 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Including chemical, synthetic, and cross-disciplinary approaches; this book includes the necessary techniques and technologies to help readers better understand polymers for polymer electrolyte membrane (PEM) fuel cells. The methods in the book are essential to researchers and scientists in the field and will lead to further development in polymer and fuel cell technologies. • Provides complete, essential, and comprehensive overview of polymer applications for PEM fuel cells • Emphasizes state-of-the-art developments and methods, like PEMs for novel fuel cells and polymers for fuel cell catalysts • Includes detailed chapters on major topics, like PEM for direct liquid fuel cells and fluoropolymers and non-fluorinated polymers for PEM • Has relevance to a range of industries – like polymer engineering, materials, and green technology – involved with fuel cell technologies and R&D
Author : Dr Inamuddin
Publisher : Springer
ISBN 13 : 3319527398
Total Pages : 474 pages
Book Rating : 4.3/5 (195 download)
Download or read book Organic-Inorganic Composite Polymer Electrolyte Membranes written by Dr Inamuddin and published by Springer. This book was released on 2017-05-10 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume explores the latest developments in the area of polymer electrolyte membranes (PEMs) used for high-temperature fuel cells. Featuring contributions from an international array of researchers, it presents a unified viewpoint on the operating principles of fuel cells, various methodologies used for the fabrication of PEMs, and issues related to the chemical and mechanical stabilities of the membranes. Special attention is given to the fabrication of electrospun nanocomposite membranes. The editors have consciously placed an emphasis on developments in the area of fast-growing and promising PEM materials obtained via hygroscopic inorganic fillers, solid proton conductors, heterocyclic solvents, ionic liquids, anhydrous H3PO4 blends, and heteropolyacids. This book is intended for fuel cell researchers and students who are interested in a deeper understanding of the organic–inorganic membranes used in fuel cells, membrane fabrication methodologies, properties and clean energy applications.
Author : Jince Thomas
Publisher : John Wiley & Sons
ISBN 13 : 352735039X
Total Pages : 453 pages
Book Rating : 4.5/5 (273 download)
Download or read book Alkaline Anion Exchange Membranes for Fuel Cells written by Jince Thomas and published by John Wiley & Sons. This book was released on 2024-02-05 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alkaline Anion Exchange Membranes for Fuel Cells Build the fuel cells of the future with this cutting-edge material Alkaline anion exchange membranes (AAEMs) are cutting-edge polyelectrolyte materials with growing renewable energy applications including fuel cells, batteries, hydrogen electrolyzers and electrodialysis technologies. Their use in relatively new alkaline exchange membrane fuel cells (AEMFCs) is designed to produce cost-effective clean energy (electricity) produced by a chemical reaction. Rigorous studies are being conducted to meet the requirements of AAEMs precisely tailored for high anion conductivity and durability for future high energy efficient devices. Hence, over the past few years the academic and industrial scientific communities have explored various polymeric, composite and inorganic materials and studied their properties as a potential AAEM. The accumulated literature in this area of investigation is vast and in order to provide the community with the tools needed to strive forward, there is a clear need to condense this information in a single volume. Alkaline Anion Exchange Membranes for Fuel Cells meets this need with a comprehensive overview of the properties of these membranes and their applications. The book considers recent developments, common challenges, and the long-term prospects for this field of research and engineering. It constitutes a one-stop resource for the development and production of AAEM fuel cells and related electrochemical applications. Alkaline Anion Exchange Membranes for Fuel Cells readers will find: Discussion of electrochemical applications like redox flow batteries, water electrolysis, and many more Detailed treatment of specially tailored cationic groups such as quaternary ammonium and guanidinium Expert advice on efficient fabrication and electrode assembly Alkaline Anion Exchange Membranes for Fuel Cells is ideal for electrochemists, materials scientists, polymer chemists, electrical engineers, and anyone working in power technology or related fields.
Author : Klaus-Viktor Peinemann
Publisher : John Wiley & Sons
ISBN 13 : 3527622241
Total Pages : 304 pages
Book Rating : 4.5/5 (276 download)
Download or read book Membranes for Energy Conversion written by Klaus-Viktor Peinemann and published by John Wiley & Sons. This book was released on 2008-09-08 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focusing on recent developments in innovative energy conversion, this second volume features emerging applications with the capacity to transform the entire energy economy. Specific examples include the development of sulfonated polyarylether-type polymers as proton exchange membranes for high- and medium-temperature polymer electrode fuel cells (PEFC), with an entire section devoted to the rapidly expanding field of materials development for solid oxide fuel cells (SOFC). The result is a detailed and invaluable source of information for those involved in the chemical, material science and engineering fields of power generation.
Author : Shulamith Schlick
Publisher : John Wiley & Sons
ISBN 13 : 1119196078
Total Pages : 360 pages
Book Rating : 4.1/5 (191 download)
Download or read book The Chemistry of Membranes Used in Fuel Cells written by Shulamith Schlick and published by John Wiley & Sons. This book was released on 2018-01-02 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examines the important topic of fuel cell science by way of combining membrane design, chemical degradation mechanisms, and stabilization strategies This book describes the mechanism of membrane degradation and stabilization, as well as the search for stable membranes that can be used in alkaline fuel cells. Arranged in ten chapters, the book presents detailed studies that can help readers understand the attack and degradation mechanisms of polymer membranes and mitigation strategies. Coverage starts from fundamentals and moves to different fuel cell membrane types and methods to profile and analyze them. The Chemistry of Membranes Used in Fuel Cells: Degradation and Stabilization features chapters on: Fuel Cell Fundamentals: The Evolution of Fuel Cells and their Components; Degradation Mechanism of Perfluorinated Membranes; Ranking the Stability of Perfluorinated Membranes Used in Fuel Cells to Attack by Hydroxyl Radicals; Stabilization Mechanism of Perfluorinated Membranes by Ce(III) and Mn(II); Hydrocarbon Proton Exchange Membranes; Stabilization of Perfluorinated Membranes Using Nanoparticle Additives; Degradation Mechanism in Aquivion Perfluorinated Membranes and Stabilization Strategies; Anion Exchange Membrane Fuel Cells: Synthesis and Stability; In-depth Profiling of Degradation Processes in Nafion Due to Pt Dissolution and Migration into the Membrane; and Quantum Mechanical Calculations of the Degradation Mechanism in Perfluorinated Membranes. Brings together aspects of membrane design, chemical degradation mechanisms and stabilization strategies Emphasizes chemistry of fuel cells, which is underemphasized in other books Includes discussion of fuel cell performance and behavior, analytical profiling methods, and quantum mechanical calculations The Chemistry of Membranes Used in Fuel Cells is an ideal book for polymer scientists, chemists, chemical engineers, electrochemists, material scientists, energy and electrical engineers, and physicists. It is also important for grad students studying advanced polymers and applications.
Author : Zhen Zhou
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (268 download)
Download or read book Development of Polymer Electrolyte Membranes for Fuel Cells to be Operated at High Temperature and Low Humidity written by Zhen Zhou and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer electrolyte membrane fuel cells (PEMFCs) have been looked as potential alternative energy conversion devices to conventional energy conversion systems such as combustion engines. Proton conducting membranes (PEMs) are one critical component of PEMFCs. The development of novel electrolyte membranes with dense structure, good mechanical flexibility, and high proton conductivity, but with little or no dependence on humidity at temperatures above 100¡ãC remains an important challenge to the realization of practical PEM fuel cells. In this thesis, to solve the technical difficulties existing in current high temperature PEM systems based on phosphoric acid and imidazole, a new type of proton conducting species 1H-1,2,3-triazole has been explored, and proved to have high proton conductivity and also enough electrochemical stability for fuel cell applications. In further experiments, effective methods have been developed to synthesize triazole derivatives and polymers. The properties of the synthesized polymers have studied and reported in this thesis. Preliminary computational simulations have also been performed to study the proton conducting mechanism to provide intrinsic information of the proton conducting process in 1H-1,2,3-triazole. In the final part, research works on other proton conducting species including H3PO4 and other heterocycles have been reported.
Author : Emanuela Sgreccia
Publisher :
ISBN 13 :
Total Pages : 143 pages
Book Rating : 4.:/5 (69 download)
Download or read book Proton Conducting Membranes Based on Sulfonated Aromatic Polymers for PEM Fuel Cells written by Emanuela Sgreccia and published by . This book was released on 2010 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le membrane a scambio protonico, componenti essenziali delle celle a combustibile ad elettrolita polimerico (PEMFCs), per poter essere utilizzate efficacemente devono esibire differenti proprietà come stabilità morfologica, idrolitica, meccanica ed adeguate proprietà di conducibilità a temperature superiori a 100 °C per bassi valori d'umidità relativa. Nella presente tesi sono state esplorate due diverse strategie, basate su polimeri solfonati aromatici, per la sintesi di polimeri conduttori protonici: la formazione di ibridi organici-inorganici nanocompositi e la formazione di legami reticolati inter-catena a seguito di trattamenti termici. L'impiego di materiali ibridi permette di sfruttare l'effetto sinergico dovuto alla contemporanea presenza di una componente organica, polimerica, e di una inorganica. In particolare si è utilizzata una miscela costituita dallo S-PEEK ad alto grado di solfonazione come composto base e da un polimero sililato a base di PPSU come componente minoritario. Lo S-PEEK viene utilizzato per garantire un'elevata conducibilità, mentre l'Si-PPSU garantisce una buona stabilità meccanica (fase "ancora"). Sono stati anche studiati composti nanocompositi ibridi a base di S-PEEK in cui è stata dispersa TiO2 funzionalizzata. Anche la seconda strategia seguita, la sintesi di composti reticolati, ha dato risultati molto positivi. In particolare si è osservato, per la prima volta, che potevano essere ottenuti legami solfone inter-catena tramite l'utilizzo di opportuni trattamenti termici in presenza di DMSO come solvente di casting. Si è dimostrato che le membrane così ottenute sono in grado di resistere in acqua fino a 145 °C senza dare importanti fenomeni di swelling, mantenendo la stabilità meccanica e buone proprietà di conducibilità. Le membrane sono state caratterizzate mediante l'utilizzo di molte tecniche, tra cui: l'analisi termogravimetrica, le misure meccaniche statiche e dinamiche, le misure di assorbimento d'acqua, sia per immersione, che in fase vapore, la spettroscopie IR ed NMR, la spettroscopia di impedenza e l'analisa dielettrica.
Author : N. Rajalakshmi
Publisher : Nova Publishers
ISBN 13 : 9781604562118
Total Pages : 154 pages
Book Rating : 4.5/5 (621 download)
Download or read book Present Trends in Fuel Cell Technology Development written by N. Rajalakshmi and published by Nova Publishers. This book was released on 2008 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book the authors assess the technology for fuel cells in terms of processes and basic science, materials, applications and infrastructure. Each section is devoted to a particular type of fuel cell technology covering all the aspects of processes, materials, application, technology, challenges and present trends.
Author : Felix N. Büchi
Publisher : Springer Science & Business Media
ISBN 13 : 038785536X
Total Pages : 489 pages
Book Rating : 4.3/5 (878 download)
Download or read book Polymer Electrolyte Fuel Cell Durability written by Felix N. Büchi and published by Springer Science & Business Media. This book was released on 2009-02-08 with total page 489 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers a significant number of R&D projects, performed mostly after 2000, devoted to the understanding and prevention of performance degradation processes in polymer electrolyte fuel cells (PEFCs). The extent and severity of performance degradation processes in PEFCs were recognized rather gradually. Indeed, the recognition overlapped with a significant number of industrial dem- strations of fuel cell powered vehicles, which would suggest a degree of technology maturity beyond the resaolution of fundamental failure mechanisms. An intriguing question, therefore, is why has there been this apparent delay in addressing fun- mental performance stability requirements. The apparent answer is that testing of the power system under fully realistic operation conditions was one prerequisite for revealing the nature and extent of some key modes of PEFC stack failure. Such modes of failure were not exposed to a similar degree, or not at all, in earlier tests of PEFC stacks which were not performed under fully relevant conditions, parti- larly such tests which did not include multiple on–off and/or high power–low power cycles typical for transportation and mobile power applications of PEFCs. Long-term testing of PEFCs reported in the early 1990s by both Los Alamos National Laboratory and Ballard Power was performed under conditions of c- stant cell voltage, typically near the maximum power point of the PEFC.
Author : Jürgen Garche
Publisher : Newnes
ISBN 13 : 0444527451
Total Pages : 4532 pages
Book Rating : 4.4/5 (445 download)
Download or read book Encyclopedia of Electrochemical Power Sources written by Jürgen Garche and published by Newnes. This book was released on 2013-05-20 with total page 4532 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Encyclopedia of Electrochemical Power Sources is a truly interdisciplinary reference for those working with batteries, fuel cells, electrolyzers, supercapacitors, and photo-electrochemical cells. With a focus on the environmental and economic impact of electrochemical power sources, this five-volume work consolidates coverage of the field and serves as an entry point to the literature for professionals and students alike. Covers the main types of power sources, including their operating principles, systems, materials, and applications Serves as a primary source of information for electrochemists, materials scientists, energy technologists, and engineers Incorporates nearly 350 articles, with timely coverage of such topics as environmental and sustainability considerations
Author : Yan Li
Publisher : Springer Nature
ISBN 13 : 9811950539
Total Pages : 628 pages
Book Rating : 4.8/5 (119 download)
Download or read book Advanced Driver Assistance Systems and Autonomous Vehicles written by Yan Li and published by Springer Nature. This book was released on 2022-10-28 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive reference for both academia and industry on the fundamentals, technology details, and applications of Advanced Driver-Assistance Systems (ADAS) and autonomous driving, an emerging and rapidly growing area. The book written by experts covers the most recent research results and industry progress in the following areas: ADAS system design and test methodologies, advanced materials, modern automotive technologies, artificial intelligence, reliability concerns, and failure analysis in ADAS. Numerous images, tables, and didactic schematics are included throughout. This essential book equips readers with an in-depth understanding of all aspects of ADAS, providing insights into key areas for future research and development. • Provides comprehensive coverage of the state-of-the-art in ADAS • Covers advanced materials, deep learning, quality and reliability concerns, and fault isolation and failure analysis • Discusses ADAS system design and test methodologies, novel automotive technologies • Features contributions from both academic and industry authors, for a complete view of this important technology
Author : Shulamith Schlick
Publisher :
ISBN 13 : 9781523115686
Total Pages : pages
Book Rating : 4.1/5 (156 download)
Download or read book The Chemistry of Membranes Used in Fuel Cells written by Shulamith Schlick and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
