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Informationen zum Autor Philippe Knauth is Professor and Director of the Laboratoire Chimie Provence, University of Provence, Marseille, France. He has published 6 books, 2 European and 2 US patents, 200 publications, including 95 papers in international journals and 35 invited/plenary talks at international conferences. Maria Luisa Di Vona is Assistant Professor in Chemistry at the Dipartimento di Scienze e Tecnologie Chimiche, Universita Degli Studi di RomaTor Veragata, Rome, Italy. She is also Visiting Professor at the University of Provence. Author of 100 publications, including 67 in international journals, 2 book chapters , 1 book ( Electroceramics VIII-2002 ). Di Vona and Knauth were organizers of the 2009 E-MRS symposium "Materials for Polymer Electrolyte Membrane Fuel Cells". Klappentext Proton conduction can be found in many different solid materials, from organic polymers at room temperature to inorganic oxides at high temperature. Solid state proton conductors are of central interest for many technological innovations, including hydrogen and humidity sensors, membranes for water electrolyzers and, most importantly, for high-efficiency electrochemical energy conversion in fuel cells.Focusing on fundamentals and physico-chemical properties of solid state proton conductors, topics covered include:* Morphology and Structure of Solid Acids* Diffusion in Solid Proton Conductors by Nuclear Magnetic Resonance Spectroscopy* Structure and Diffusivity by Quasielastic Neutron Scattering* Broadband Dielectric Spectroscopy* Mechanical and Dynamic Mechanical Analysis of Proton-Conducting Polymers* Ab initio Modeling of Transport and Structure* Perfluorinated Sulfonic Acids* Proton-Conducting Aromatic Polymers* Inorganic Solid Proton ConductorsUniquely combining both organic (polymeric) and inorganic proton conductors, Solid State Proton Conductors: Properties and Applications in Fuel Cells provides a complete treatment of research on proton-conducting materials. Zusammenfassung Higher ionic conductivity, better mechanical strength, lower cost, and improved durability of proton-conducting materials are all important issues to accelerate the commercialization of fuel cell technology. Inhaltsverzeichnis Preface xi About the Editors xiii Contributing Authors xv 1 Introduction and Overview: Protons, the Nonconformist Ions 1 Maria Luisa Di Vona and Philippe Knauth 1.1 Brief History of the Field 2 1.2 Structure of This Book 2 References 4 2 Morphology and Structure of Solid Acids 5 Habib Ghobarkar, Philippe Knauth and Oliver SchEURaf 2.1 Introduction 5 2.1.1 Preparation Technique of Solid Acids 5 2.1.2 Imaging Technique with the Scanning Electron Microscope 6 2.2 Crystal Morphology and Structure of Solid Acids 8 2.2.1 Hydrohalic Acids 8 2.2.2 Main Group Element Oxoacids 10 2.2.3 Transition Metal Oxoacids 20 2.2.4 Carboxylic Acids 22 References 24 3 Diffusion in Solid Proton Conductors: Theoretical Aspects and Nuclear Magnetic Resonance Analysis 25 Maria Luisa Di Vona, Emanuela Sgreccia and Sebastiano Tosto 3.1 Fundamentals of Diffusion 25 3.1.1 Phenomenology of Diffusion 26 3.1.2 Solutions of the Diffusion Equation 35 3.1.3 Diffusion Coefficients and Proton Conduction 37 3.1.4 Measurement of the Diffusion Coefficient 38 3.2 Basic Principles of NMR 40 3.2.1 Description of the Main NMR Techniques Used in Measuring Diffusion Coefficients 42 3.3 Application of NMR Techniques 47 3.3.1 Polymeric Proton Conductors 47 3.3.2 Inorganic Proton Conductors 58 3.4 Liquid Water Visualization in Proton-Conducting Membranes by Nuclear Magnetic Resonance Imaging 62 3.5 Conclusions 66 References 67
