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Membrane Electrode Assembly Modification By Zeolite And Graphene Oxide To Reduce Methanol Permeation In Polymer Electrolyte Membrane Fuel Cell
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Book Synopsis Membrane Electrode Assembly Modification by Zeolite and Graphene Oxide to Reduce Methanol Permeation in Polymer Electrolyte Membrane Fuel Cell by : Sirhan Al Batty
Download or read book Membrane Electrode Assembly Modification by Zeolite and Graphene Oxide to Reduce Methanol Permeation in Polymer Electrolyte Membrane Fuel Cell written by Sirhan Al Batty and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthetic Polymeric Membranes for Advanced Water Treatment, Gas Separation, and Energy Sustainability by : Ahmad Fauzi Ismail
Download or read book Synthetic Polymeric Membranes for Advanced Water Treatment, Gas Separation, and Energy Sustainability written by Ahmad Fauzi Ismail and published by Elsevier. This book was released on 2020-05-14 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthetic Polymeric Membranes for Advanced Water Treatment, Gas Separation, and Energy Sustainability is a cutting-edge guide that focuses on advanced water treatment applications, covering oily wastewater treatment, desalination, removal of dyes and pigments, photodegradation of organic hazardous materials, heavy metal removal, removal and recovery of nutrients, and volatile organic compounds. Other sections examine the area of gas separation, including acidic gas removal, oxygen enrichment, gas and vapor separation, hydrogen separation, and gas sensing. Final sections cover applications for sustainable energy usage, including the use of synthetic polymer membranes in proton exchange membrane fuel cells (PEMFCs), and more. This is a highly valuable guide for researchers, scientists, and advanced students, working with polymer membranes and films, and across polymer science, polymer chemistry, materials science, chemical e - Explains the design, preparation and characterization of synthetic polymer-based membranes for advanced applications - Provides a clear picture of the state-of-the-art in the field, including novel fabrication approaches and the latest advances in physico-chemical characterizations - Supports the development and implementation of innovative, sustainable solutions to water treatment, gas separation and energy devices
Book Synopsis Improving Selectivity in Methanol Fuel Cell Membranes by : Brett Libby
Download or read book Improving Selectivity in Methanol Fuel Cell Membranes written by Brett Libby and published by . This book was released on 2001 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development and Characterization of Proton Conductive Membranes and Membrane Electrode Assemblies for Fuel Cells by : Ruichun Jiang
Download or read book Development and Characterization of Proton Conductive Membranes and Membrane Electrode Assemblies for Fuel Cells written by Ruichun Jiang and published by . This book was released on 2005 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Direct Methanol Fuel Cells by : Antonio Salvatore Aricò
Download or read book Direct Methanol Fuel Cells written by Antonio Salvatore Aricò and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with an analysis of materials issues, status of technologies and potential applications of direct methanol fuel cells. The principle of operation of direct methanol fuel cells and the status of knowledge in the basic research areas are presented. The technology of direct methanol fuel cells is discussed in this book with particular regard to fabrication methodologies for the manufacturing of catalysts, electrolytes membrane-electrode assemblies, stack hardware and system design.
Book Synopsis Engineering the Membrane Electrode Assembly of Direct Methanol Fuel Cells Using Novel Graphene Architecture by : Prabhuraj Balakrishnan
Download or read book Engineering the Membrane Electrode Assembly of Direct Methanol Fuel Cells Using Novel Graphene Architecture written by Prabhuraj Balakrishnan and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electrochemistry of Proton-exchange-membrane Electrolyte Fuel Cell (PEMFC) Electrodes by :
Download or read book Electrochemistry of Proton-exchange-membrane Electrolyte Fuel Cell (PEMFC) Electrodes written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stabilized Composite Membranes and Membrane Electrode Assemblies for High Temperature/low Relative Humidity Polymer Electrolyte Fuel Cell Operation by : Vijay Krishna Ramani
Download or read book Stabilized Composite Membranes and Membrane Electrode Assemblies for High Temperature/low Relative Humidity Polymer Electrolyte Fuel Cell Operation written by Vijay Krishna Ramani and published by . This book was released on 2004 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modifying Interface Solvation to Improve the Oxygen Reduction Reaction Electrocatalysis by : Ramchandra Gawas
Download or read book Modifying Interface Solvation to Improve the Oxygen Reduction Reaction Electrocatalysis written by Ramchandra Gawas and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increasing the accessibility of green, affordable hydrogen and reducing the cost of polymer electrolyte membrane fuel cells (PEMFC) devices are critical for the widespread commercialization of hydrogen powered fuel cells. The high cost of PEMFCs is in part due to the high Pt leadings in the cathode catalyst layer (CCL) to compensate for kinetic and transport losses during the sluggish oxygen reduction reaction. Therefore, substantial research efforts have been focused on modifying the CCL and its constituent components to achieve cost parity with other advanced energy technologies, particularly in the transportation sector. Hydrophobic ionic liquids (ILs) have been used as interfacial additives for oxygen reduction reaction (ORR) electrocatalysts, demonstrating enhanced catalyst activity and durability. However, incorporating ILs or IL-modified catalysts into the electrodes of a PEMFC membrane electrode assembly (MEA) has proven to be challenging. To address this limitation, we develop a new ionomer chemistry with orthogonal properties of protonic conductivity and ionic liquid functionality: sulfonated poly(ionic liquid) block copolymers (S-PILBCPs). The new ionomer in the Pt/C CCLs yields a two-fold improvement in the kinetic activity, both in the half-cell and MEA. Furthermore, a Nafion/S-PILBCP composite ionomer substantially improves the high current density performance as well. Despite remarkable improvement in performance at half-cell and MEA-level, the mechanism of this improvement is not completely understood. We combine single crystal voltammetry with microkinetic modeling to analyze the mechanism of ORR enhancement in presence of ionic liquids. With iterative feedback between single crystal voltammetry and microkinetic model output, we establish the importance of accounting for lateral interactions between adsorbed oxygenated species by using real data informed adsorption isotherms. With our experimentally validated model, we show that the mechanism of impact of ILs on ORR activity is through exclusion of water and reduction in electrochemical interface solvation, yielding lower spectator hydroxyl coverages and a reduced barrier for hydroxyl removal, resulting in higher surface site availability during the ORR. The ORR activity of electrocatalysts is traditionally calculated using the current density measured at 0.9 V vs. RHE during the anodic sweep of the ORR polarization curve. This approach enables a quick and reliable screening technique for novel ORR electrocatalysts. However, linear sweep techniques often conceal transient features which could arise during the constant current or potential operation in real devices. We observe that ORR current significantly decays over time at constant potentials as a result of dynamic competition for active sites between the spectator hydroxyl and reactant oxygen species. We employ well-defined single crystal surfaces with the help of microkinetic modeling to get insights into this transient phenomenon observed during the ORR. This improved understanding will help design Pt-interfaces to moderate the interaction of the interfacial water network with Pt active sites, providing another strategy for improving ORR kinetics.
Download or read book PEM Fuel Cells written by Yun Wang and published by Momentum Press. This book was released on 2013-04-06 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer Electrolyte Membrane (PEM) fuel cells convert chemical energy in hydrogen into electrical energy with water as the only by-product. Thus, PEM fuel cells hold great promise to reduce both pollutant emissions and dependency on fossil fuels, especially for transportation—passenger cars, utility vehicles, and buses—and small-scale stationary and portable power generators. But one of the greatest challenges to realizing the high efficiency and zero emissions potential of PEM fuel cells technology is heat and water management. This book provides an introduction to the essential concepts for effective thermal and water management in PEM fuel cells and an assessment on the current status of fundamental research in this field. The book offers you: • An overview of current energy and environmental challenges and their imperatives for the development of renewable energy resources, including discussion of the role of PEM fuel cells in addressing these issues; • Reviews of basic principles pertaining to PEM fuel cells, including thermodynamics, electrochemical reaction kinetics, flow, heat and mass transfer; and • Descriptions and discussions of water transport and management within a PEM fuel cell, including vapor- and liquid-phase water removal from the electrodes, the effects of two-phase flow, and solid water or ice dynamics and removal, particularly the specialized case of starting a PEM fuel cell at sub-freezing temperatures (cold start) and the various processes related to ice formation.
Book Synopsis Applications of Polyamidoamine Dendrimers in Polymer Electrolyte Membrane Fuel Cells by : Huizhen Zhu
Download or read book Applications of Polyamidoamine Dendrimers in Polymer Electrolyte Membrane Fuel Cells written by Huizhen Zhu and published by . This book was released on 2009 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dendrimers are highly branched macromolecules with well-ordered three- dimensional architectures. Polyamidoamine (PAMAM), the most common class of dendrimers, have been widely studied due primarily to the following three features: 1) the interior amine and amide groups that can interact with ionic metal precursors through ligand exchange reactions; 2) the presence of an interior void space in the higher generation dendrimers; and 3) the exterior primary amine groups that permit further functionaliztion. These unique structural features have inspired many potential applications. This dissertation describes two applications of PAMAM dendrimers in polymer electrolyte membrane fuel cells (PEMFCs). First, in an effort to improve the utility of Pt in PEMFCs, PAMAM G4 was used as both a template and a stabilizer to synthesize dendrimer encapsulated Pt nanoparticles (Pt DENs) by photoreduction. These nanoparticles are highly monodisperse, exhibit high specific activity for the oxygen reduction reaction, and are inert to methanol oxidation, showing great potential for application in PEMFCs. Then, a simplified membrane electrode assembly (MEA) has been fabricated by the electrostatic self-assembly between Nafion® and Pt DENs and characterized. Two methods were proposed to increase Pt loading: layer-by-layer self-assembly and immobilization of Pt DENs and carbon powder on carbon fibers. Approximately 80 layers were proposed to reach the required loading using a dipping machine. Immobilization of Pt DENs and carbon powder simultaneously on carbon fibers can easily be achieved by electrochemical coupling, which is promising for replacing the conventional method of electrode fabrication. Secondly, in order to reduce the methanol crossover in direct methanol fuel cells (DMFCs), PAMAM G0 doped Nafion® membranes were prepared. Direct TEM imaging of the Naifon® embedded with nanoparticles demonstrates that PAMAM G0 can penetrate into the bulk of Nafion® through cluster channels to re-organize the distribution of sulfonate clusters by interacting with the sulfonic acid groups in different clusters. The presence of PAMAM G0 in the Nafion® membrane causes reduction of both methanol permeability and proton conductivity, but a very beneficial trade off can be reached when a doping concentration of 10−4 M PAMAM G0 is used. The fuel cell performance is much improved When Nafion® was treated with 10−4 M PAMAM G0.
Book Synopsis Polymer Electrolyte Membrane and Direct Methanol Fuel Cell Technology by : Christoph Hartnig
Download or read book Polymer Electrolyte Membrane and Direct Methanol Fuel Cell Technology written by Christoph Hartnig and published by . This book was released on 2012 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recent Advances in High-Temperature PEM Fuel Cells by : Sivakumar Pasupathi
Download or read book Recent Advances in High-Temperature PEM Fuel Cells written by Sivakumar Pasupathi and published by Academic Press. This book was released on 2016-09-13 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrogen and Fuel Cells Primers is a series focused on Energy applications. Its concise volumes present those coming into this broad and multidisciplinary field with the most recent advances in each of its particular topics. They bring together information that has thus far been scattered in many different sources under one single title, which makes them a useful reference for industry professionals, researchers and graduate students, especially those starting in a new topic of research. This volume, Recent Advances in High Temperature PEM Fuel Cells, provides an up-to-date progress of High Temperature Polymer Electrolyte Membrane Fuel Cells (HTPEMFCs), including three critical subjects for this type of fuel cells: Membrane Electrode Assembly (MEA) development, stack development and systems development. The MEA and stack development sections cover the recent advances in this area and highlight the areas in most need of improvement. The systems development section focuses on stationary systems, mainly Combined Heat and Power (CHP), based on HTPEMFCs. Finally the conclusions summarize the recent advances of HTPEMFCs in all these areas and provide some insights for future developments. Prof. Bruno G. Pollet, Series Editor - Presents the most current knowledge in membrane electrode assembly, stack, and systems development for HTPEMFCs - Highlights the areas that need improvement in electrode assembly and stack development - Examines stationary high temperature PEMFC systems, including CHP
Book Synopsis High Temperature Polymer Electrolyte Membrane Fuel Cells by : Qingfeng Li
Download or read book High Temperature Polymer Electrolyte Membrane Fuel Cells written by Qingfeng Li and published by Springer. This book was released on 2015-10-15 with total page 561 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a comprehensive review of high-temperature polymer electrolyte membrane fuel cells (PEMFCs). PEMFCs are the preferred fuel cells for a variety of applications such as automobiles, cogeneration of heat and power units, emergency power and portable electronics. The first 5 chapters of the book describe rationalization and illustration of approaches to high temperature PEM systems. Chapters 6 - 13 are devoted to fabrication, optimization and characterization of phosphoric acid-doped polybenzimidazole membranes, the very first electrolyte system that has demonstrated the concept of and motivated extensive research activity in the field. The last 11 chapters summarize the state-of-the-art of technological development of high temperature-PEMFCs based on acid doped PBI membranes including catalysts, electrodes, MEAs, bipolar plates, modelling, stacking, diagnostics and applications.
Book Synopsis PEM Water Electrolysis by : Dmitri Bessarabov
Download or read book PEM Water Electrolysis written by Dmitri Bessarabov and published by Academic Press. This book was released on 2018-08-04 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: PEM Water Electrolysis, a volume in the Hydrogen Energy and Fuel Cell Primers series presents the most recent advances in the field. It brings together information that has thus far been scattered in many different sources under one single title, making it a useful reference for industry professionals, researchers and graduate students. Volumes One and Two allow readers to identify technology gaps for commercially viable PEM electrolysis systems for energy applications and examine the fundamentals of PEM electrolysis and selected research topics that are top of mind for the academic and industry community, such as gas cross-over and AST protocols. The book lays the foundation for the exploration of the current industrial trends for PEM electrolysis, such as power to gas application and a strong focus on the current trends in the application of PEM electrolysis associated with energy storage. - Presents the fundamentals and most current knowledge in proton exchange membrane water electrolyzers - Explores the technology gaps and challenges for commercial deployment of PEM water electrolysis technologies - Includes unconventional systems, such as ozone generators - Brings together information from many different sources under one single title, making it a useful reference for industry professionals, researchers and graduate students alike
Book Synopsis Polymer Electrolyte Membrane and Direct Methanol Fuel Cell Technology by : Christoph Hartnig
Download or read book Polymer Electrolyte Membrane and Direct Methanol Fuel Cell Technology written by Christoph Hartnig and published by Elsevier. This book was released on 2012-02-20 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer electrolyte membrane fuel cells (PEMFCs) and direct methanol fuel cells (DMFCs) technology are promising forms of low-temperature electrochemical power conversion technologies that operate on hydrogen and methanol respectively. Featuring high electrical efficiency and low operational emissions, they have attracted intense worldwide commercialization research and development efforts. These R&D efforts include a major drive towards improving materials performance, fuel cell operation and durability. In situ characterization is essential to improving performance and extending operational lifetime through providing information necessary to understand how fuel cell materials perform under operational loads.Polymer Electrolyte Membrane and Direct Methanol Fuel Cell Technology, Volume 2 details in situ characterization, including experimental and innovative techniques, used to understand fuel cell operational issues and materials performance. Part I reviews enhanced techniques for characterization of catalyst activities and processes, such as X-ray absorption and scattering, advanced microscopy and electrochemical mass spectrometry. Part II reviews characterization techniques for water and fuel management, including neutron radiography and tomography, magnetic resonance imaging and Raman spectroscopy. Finally, Part III focuses on locally resolved characterization methods, from transient techniques and electrochemical microscopy, to laser-optical methods and synchrotron radiography.With its international team of expert contributors, Polymer electrolyte membrane and direct methanol fuel cell technology will be an invaluable reference for low temperature fuel cell designers and manufacturers, as well as materials science and electrochemistry researchers and academics. Polymer electrolyte membrane and direct methanol fuel cell technology is an invaluable reference for low temperature fuel cell designers and manufacturers, as well as materials science and electrochemistry researchers and academics. - Details in situ characterisation of polymer electrolyte membrane fuel cells (PEMFCs) and direct methanol fuel cells (DMFCs), including the experimental and innovative techniques used to understand fuel cell operational issues and materials performance - Examines enhanced techniques for characterisation of catalyst activities and processes, such as X-ray absorption and scattering, advanced microscopy and electrochemical mass spectrometry - Reviews characterisation techniques for water and fuel management, including neutron radiography and tomography, and comprehensively covers locally resolved characterisation methods, from transient techniques to laser-optical methods
Book Synopsis Optimizing Membrane Electrode Assembly of Direct Methanol Fuel Cells for Portable Power by : Fuqiang Liu
Download or read book Optimizing Membrane Electrode Assembly of Direct Methanol Fuel Cells for Portable Power written by Fuqiang Liu and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
