Characterization and Modeling of Electrochemical Energy Conversion Systems by Impedance Techniques
Characterization and Modeling of Electrochemical Energy Conversion Systems by Impedance Techniques

Author: Dino Klotz

Publisher: KIT Scientific Publishing

Published: 2014-07-30

Total Pages: 182

ISBN-13: 3866449038

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This thesis introduces (i) amendments to basic electrochemical measurement techniques in the time and frequency domain suitable for electrochemical energy conversion systems like fuel cells and batteries, which enable shorter measurement times and improved precision in both measurement and parameter identification, and (ii) a modeling approach that is able to simulate a technically relevant system just by information gained through static and impedance measurements of laboratory size cells.

Microstructural Characterisation, Modelling and Simulation of Solid Oxide Fuel Cell Cathodes
Microstructural Characterisation, Modelling and Simulation of Solid Oxide Fuel Cell Cathodes

Author: Joos, Jochen

Publisher: KIT Scientific Publishing

Published: 2017-06-29

Total Pages: 246

ISBN-13: 3731506254

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This work deals with microstructural characterisation, modelling and simulation of SOFC electrodes with the goal of optimizing the electrode microstructures. Methods for a detailed electrode analysis based on focused ion beam (FIB) tomography are presented. A 3D FEM model able to perform simulations of LSCF cathodes based on 3D tomography data is shown. A model generating realistic, yet synthetic microstructures is presented that enables the optimization of microstructural characteristics.

Model-based Interpretation of the Performance and Degradation of Reformate Fueled Solid Oxide Fuel Cells
Model-based Interpretation of the Performance and Degradation of Reformate Fueled Solid Oxide Fuel Cells

Author: Alexander Kromp

Publisher: KIT Scientific Publishing

Published: 2014-05-12

Total Pages: 146

ISBN-13: 373150006X

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Solid oxide fuel cells offer great prospects for the sustainable, clean and safe conversion of various fuels into electrical energy. In this thesis, the performance-determining loss processes for the cell operation on reformate fuels are elucidated via electrochemical impedance spectroscopy. Model-based analyses reveal the electrochemical fuel oxidation mechanism, the coupling of fuel gas transport and reforming chemistry and the impact of fuel impurities on the degradation of each loss process.

Physically based Impedance Modelling of Lithium-Ion Cells
Physically based Impedance Modelling of Lithium-Ion Cells

Author: Illig, Joerg

Publisher: KIT Scientific Publishing

Published: 2014-09-19

Total Pages: 231

ISBN-13: 3731502461

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In this book, a new procedure to analyze lithium-ion cells is introduced. The cells are disassembled to analyze their components in experimental cell housings. Then, Electrochemical Impedance Spectroscopy, time domain measurements and the Distribution function of Relaxation Times are applied to obtain a deep understanding of the relevant loss processes. This procedure yields a notable surplus of information about the electrode contributions to the overall internal resistance of the cell.

Electrochemical Performance and Stability of Ba₀.₅Sr₀.₅Co₀.₈Fe₀.₂O₃₋δ for Oxygen Transport Membranes
Electrochemical Performance and Stability of Ba₀.₅Sr₀.₅Co₀.₈Fe₀.₂O₃₋δ for Oxygen Transport Membranes

Author: Niedrig, Christian

Publisher: KIT Scientific Publishing

Published: 2015-12-23

Total Pages: 206

ISBN-13: 3731504375

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Mixed ionic-electronic conducting (MIEC) ceramics as oxygen transport membranes (OTMs) can provide high oxygen permeation rates at comparably low energy demands. For this purpose, Ba?.?Sr?.?Co?.?Fe?.?O??? (BSCF) shows the best performance under ideal operating conditions. Thermal and chemical stability investigations, electrical behavior ?(T,pO?,t), and oxygen exchange parameter extraction by means of electrical conductivity relaxation resulted in a far better understanding of the BSCF system.

Finite Element Method (FEM) Model and Performance Analysis of Solid Oxide Fuel Cells
Finite Element Method (FEM) Model and Performance Analysis of Solid Oxide Fuel Cells

Author: Geisler, Helge Ingolf

Publisher: KIT Scientific Publishing

Published: 2019-07-10

Total Pages: 292

ISBN-13: 3731508958

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This work presents a numerical FEM framework, capable of predicting SOFC performance under technically relevant, planar stack contacting conditions. A high level of confidence in the model predictions is supplied by using exclusively experimentally determined material/kinetic parameters and by a comprehensive validation. The presented model aids SOFC stack development by pre-evaluating possible material choices and design combinations for cells/interconnectors without any experimental effort.

Carbons for Electrochemical Energy Storage and Conversion Systems
Carbons for Electrochemical Energy Storage and Conversion Systems

Author: Francois Beguin

Publisher: CRC Press

Published: 2009-11-18

Total Pages: 532

ISBN-13: 1420055402

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As carbons are widely used in energy storage and conversion systems, there is a rapidly growing need for an updated book that describes their physical, chemical, and electrochemical properties. Edited by those responsible for initiating the most progressive conference on Carbon for Energy Storage and Environment Protection (CESEP), this book undoub

Electrochemical Supercapacitors for Energy Storage and Delivery
Electrochemical Supercapacitors for Energy Storage and Delivery

Author: Aiping Yu

Publisher: CRC Press

Published: 2013-04-09

Total Pages: 385

ISBN-13: 1439869898

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Although recognized as an important component of all energy storage and conversion technologies, electrochemical supercapacitators (ES) still face development challenges in order to reach their full potential. A thorough examination of development in the technology during the past decade, Electrochemical Supercapacitors for Energy Storage and Delivery: Fundamentals and Applications provides a comprehensive introduction to the ES from technical and practical aspects and crystallization of the technology, detailing the basics of ES as well as its components and characterization techniques. The book illuminates the practical aspects of understanding and applying the technology within the industry and provides sufficient technical detail of newer materials being developed by experts in the field which may surface in the future. The book discusses the technical challenges and the practical limitations and their associated parameters in ES technology. It also covers the structure and options for device packaging and materials choices such as electrode materials, electrolyte, current collector, and sealants based on comparison of available data. Supplying an in depth understanding of the components, design, and characterization of electrochemical supercapacitors, the book has wide-ranging appeal to industry experts and those new to the field. It can be used as a reference to apply to current work and a resource to foster ideas for new devices that will further the technology as it becomes a larger part of main stream energy storage.

Comprehensive Energy Systems
Comprehensive Energy Systems

Author: Ibrahim Dincer

Publisher: Elsevier

Published: 2018-02-07

Total Pages: 5543

ISBN-13: 0128149256

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Comprehensive Energy Systems, Seven Volume Set provides a unified source of information covering the entire spectrum of energy, one of the most significant issues humanity has to face. This comprehensive book describes traditional and novel energy systems, from single generation to multi-generation, also covering theory and applications. In addition, it also presents high-level coverage on energy policies, strategies, environmental impacts and sustainable development. No other published work covers such breadth of topics in similar depth. High-level sections include Energy Fundamentals, Energy Materials, Energy Production, Energy Conversion, and Energy Management. Offers the most comprehensive resource available on the topic of energy systems Presents an authoritative resource authored and edited by leading experts in the field Consolidates information currently scattered in publications from different research fields (engineering as well as physics, chemistry, environmental sciences and economics), thus ensuring a common standard and language

Energy Storage
Energy Storage

Author: Ahmed F. Zobaa

Publisher: BoD – Books on Demand

Published: 2013-01-23

Total Pages: 332

ISBN-13: 9535109510

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Besides new methods of generating energy, the storage of that energy is a highly important topic, with new technologies in great demand. This book offers readers a range of potential options, maximizing the possibility for success. Several chapters offer overviews of the future of such systems and estimations of their feasibility. Forms of energy storage covered include electrochemical, compressed air and flywheel systems. Other techniques addressed are the use of single- and double-switch cell voltage equalizers and hybrid energy storage and applications. Dynamic energy storage methods are also covered by two chapters. Finally, there are contributions on a low-voltage DC system with storage and distributed generation interfaced systems, and the in-situ dynamic characterization of energy storage and conversion systems.