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2015 | Book

Neutron Applications in Materials for Energy

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About this book

Neutron Applications in Materials for Energy collects results and conclusions of recent neutron-based investigations of materials that are important in the development of sustainable energy. Chapters are authored by leading scientists with hands-on experience in the field, providing overviews, recent highlights, and case-studies to illustrate the applicability of one or more neutron-based techniques of analysis. The theme follows energy production, storage, and use, but each chapter, or section, can also be read independently, with basic theory and instrumentation for neutron scattering being outlined in the introductory chapter.

Whilst neutron scattering is extensively used to understand properties of condensed matter, neutron techniques are exceptionally-well suited to studying how the transport and binding of energy and charge-carrying molecules and ions are related to their dynamics and the material’s crystal structure. These studies extend to in situ and in operando in some cases. The species of interest in leading energy-technologies include H2, H+, and Li+ which have particularly favourable neutron-scattering properties that render these techniques of analysis ideal for such studies and consequently, neutron-based analysis is common-place for hydrogen storage, fuel-cell, catalysis, and battery materials. Similar research into the functionality of solar cell, nuclear, and CO2 capture/storage materials rely on other unique aspects of neutron scattering and again show how structure and dynamics provide an understanding of the material stability and the binding and mobility of species of interest within these materials.

Scientists and students looking for methods to help them understand the atomic-level mechanisms and behaviour underpinning the performance characteristics of energy materials will find Neutron Applications in Materials for Energy a valuable resource, whilst the wider audience of sustainable energy scientists, and newcomers to neutron scattering should find this a useful reference.

Table of Contents

Frontmatter
Chapter 1. Neutron Applications in Materials for Energy: An Overview
Abstract
Creating a global energy-system that is both environmentally and economically sustainable is one of the largest challenges currently facing scientific and engineering communities. Alternative energy-technologies and new materials have risen as a result of the combined needs for energy and environmental sustainability, with the focus moving increasingly away from fossil fuels. Neutron-based techniques of analysis play a role in almost all aspects of sustainable-energy materials research, and the chapters of this book will enlarge on these studies using examples and case studies to illustrate research approaches, methods, and outcomes.
Vanessa K. Peterson, Gordon J. Kearley

Energy Generation

Frontmatter
Chapter 2. Catalysis
Abstract
Catalysis helps to save energy and to produce less waste. Hydrogen will possibly be the energy carrier for the future, but it will not replace oil before several decades so the efficiency of the catalytic processes in petroleum refinery and petrochemistry still has to be improved. Numerous physical techniques are being used to follow catalytic processes. The samples can be subjected to several probes: electrons, photons, ions, neutrons; and various fields can be applied: magnetic, electric, acoustic, etc. Apart from the basic catalyst characterization, the various methods aim to observe surface species (intermediate species are much more tricky), the reaction products, and the influence of diffusion. Coupling of two, three, or more techniques is now common and very powerful. The biggest challenge has always been to perform measurements during the reaction, the term in situ being sometimes replaced by the more recent one operando, when the catalyst is under working conditions of pressure, temperature, flow, and avoiding diffusion limitations.
Hervé Jobic
Chapter 3. Carbon Dioxide Separation, Capture, and Storage in Porous Materials
Abstract
Solid porous materials represent one of the most promising technologies for separating and storing gases of importance in the generation and use of energy. Understanding the fundamental interaction of guest molecules such as carbon dioxide in porous hosts is crucial for progressing materials towards industrial use in post and pre combustion carbon-capture processes, as well as in natural-gas sweetening. Neutron scattering has played a significant role already in providing an understanding of the working mechanisms of these materials, which are still in their infancy for such applications. This chapter gives examples of insights into the working mechanisms of porous solid adsorbents gained by neutron scattering, such as the nature of the interaction of carbon dioxide and other guest molecules with the host as well as the host response. The synthesis of many of these porous hosts affords significant molecular-level engineering of solid architectures and chemical functionalities that in turn control gas selectivity. When directed by the insights gained through neutron-scattering measurements, these materials are leading toward ideal gas separation and storage properties.
Anita Das, Deanna M. D’Alessandro, Vanessa K. Peterson
Chapter 4. Materials for the Nuclear Energy Sector
Abstract
Current and future nuclear-technologies such as fission and fusion reactor-systems depend on well-characterized structural materials, underpinned by reliable material-models. The response of the material must be understood with science-based models, under operating and accident conditions which include irradiation, high temperature and stress, corrosive environments, and magnetic fields. Neutron beams offer methods of characterizing and understanding the effects of radiation on material behaviour such as yield and tensile strength, toughness, embrittlement, fatigue and corrosion resistance. Neutron-analysis techniques improve our understanding of radiation damage, which is essential in guiding the development of new materials.
Michael Law, David G. Carr, Sven C. Vogel
Chapter 5. Chalcopyrite Thin-Film Solar-Cell Devices
Abstract
In order to understand the importance of the structural properties of compound semiconductors for the operation of a thin-film solar cell, this section aims to explain the operation principle using the example of a Cu(In,Ga)Se2 (CIGSe) thin-film solar cell. For detailed information the reader is kindly referred to the literature for a more extensive overview of the recent developments [1], device operation [2] and material preparation [3].
Susan Schorr, Christiane Stephan, Christian A. Kaufmann
Chapter 6. Organic Solar Cells
Abstract
Organic-based photoconverters are subject to a considerable interest due to their promising functionalities and their potential use as alternatives to the more expensive inorganic analogues. We introduce the basic operational mechanisms, limitations and some ideas towards improving the efficiency of organic solar cells by focusing on probing the morphological/structural, dynamical, and electronic aspects of a model organic material consisting of charge-transfer discotic liquid-crystal system hexakis(n-hexyloxy)triphenylene/2,4,7 trinitro-9-fluorenone (HAT6/TNF). For the electronic ground-state investigations, neutron-scattering techniques play a key role in gaining deeper insight into structure and dynamics. These measurements are complemented by Raman and nuclear magnetic resonance probes, as well as resonant Raman and UV-vis spectroscopies that are used to explore the low-lying excited states, at the vibronic level. Synergistically, numerical simulations, either classical via empirical force fields, or first-principles via density functional theory, are used for the analysis, interpretation and predictions.
Mohamed Zbiri, Lucas A. Haverkate, Gordon J. Kearley, Mark R. Johnson, Fokko M. Mulder

Energy Storage

Frontmatter
Chapter 7. Lithium-Ion Batteries
Abstract
The effort of material scientists in the discovery, understanding, and development of Li-ion batteries largely depends on the techniques available to observe the relevant processes on the appropriate time and length scales. This chapter aims at demonstrating the role and use of different neutron-scattering techniques in the progress of Li-ion battery electrode and electrolyte properties and function. The large range in time and length scales offered by neutron-scattering techniques is highlighted. This illustrates the type of information that can be obtained, including key parameters such as crystal structure, Li-ion positions, impact of nano-particle size and defects, ionic mobility, as well as the Li-ion distribution in electrodes and at electrode-electrolyte interfaces. Special attention is directed to the development of in situ neutron-scattering techniques providing insight on the function of battery materials under realistic conditions, a promising direction for future battery research.
Neeraj Sharma, Marnix Wagemaker
Chapter 8. Hydrogen Storage Materials
Abstract
An eventual realization of a Hydrogen Economy requires working solutions in three fundamental areas, namely hydrogen production, hydrogen storage, and fuel cells, in addition to the development of an extensive, new infrastructure. While neutron scattering experiments and the associated techniques of analysis have been of utility in all three of these research areas, they have had by far the most significant impact on the development and understanding of materials for hydrogen storage applications. This chapter examines some of these contributions.
Juergen Eckert, Wiebke Lohstroh

Energy Use

Frontmatter
Chapter 9. Neutron Scattering of Proton-Conducting Ceramics
Abstract
This chapter aims to demonstrate the important role that neutron scattering now plays in advancing the current understanding of the basic properties of proton-conducting ceramic separator-materials for future intermediate-temperature fuel cells. In particular, the breadth of contemporary neutron scattering work on proton-conducting perovskite-type oxides, hydrated alkali thio-hydroxogermanates, solid acids, and gallium-based oxides, is highlighted to illustrate the range of information that can be obtained. Crucial materials properties that are examined include crystal structure, proton sites, hydrogen bonding interactions, proton dynamics, proton concentrations, and nanoionics. Furthermore, the prospectives for future neutron studies within this field, particularly in view of the latest developments of neutron methods and the advent of new sources and their combination with other techniques, are discussed.
Maths Karlsson
Chapter 10. Neutron Techniques as a Probe of Structure, Dynamics, and Transport in Polyelectrolyte Membranes
Abstract
Polyelectrolyte membranes (PEMs) have been employed as solid electrolytes in fuel-cell technologies as early as the 1950s, when they were used in NASA’s Gemini program. However, PEM materials have only gained wide-spread attention in the last two decades due to advancements in membrane electrode-assembly (MEA) formation and the synthesis of new and interesting materials. Over the past several decades, various neutron techniques have played an instrumental role in measuring the structure and transport properties of PEMs in order to develop a deeper understanding of structure-property and performance relationships in PEM materials for fuel-cell applications.
Kirt A. Page, Joseph A. Dura, Sangcheol Kim, Brandon W. Rowe, Antonio Faraone
Backmatter
Metadata
Title
Neutron Applications in Materials for Energy
Editors
Gordon J. Kearley
Vanessa K. Peterson
Copyright Year
2015
Electronic ISBN
978-3-319-06656-1
Print ISBN
978-3-319-06655-4
DOI
https://doi.org/10.1007/978-3-319-06656-1