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Intermediate Temperature Solid Oxide Fuel Cells

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Intermediate Temperature Solid Oxide Fuel Cells

Intermediate Temperature Solid Oxide Fuel Cells Book
Author : Zongping Shao,Moses O. Tade
Publisher : Springer
Release : 2016-09-18
ISBN : 9783662529348
Language : En, Es, Fr & De

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Book Description :

This book discusses recent advances in intermediate-temperature solid oxide fuel cells (IT-SOFCs), focusing on material development and design, mechanism study, reaction kinetics and practical applications. It consists of five chapters presenting different types of reactions and materials employed in electrolytes, cathodes, anodes, interconnects and sealants for IT-SOFCs. It also includes two chapters highlighting new aspects of these solid oxide fuel cells and exploring their practical applications. This insightful and useful book appeals to a wide readership in various fields, including solid oxide fuel cells, electrochemistry, membranes and ceramics. Zongping Shao is a Professor at the State Key Laboratory of Materials-Oriented Chemical Engineering and the College of Energy, Nanjing University of Technology, China. Moses O. Tade is a Professor at the Department of Chemical Engineering, Curtin University, Australia.

Intermediate Temperature Solid Oxide Fuel Cell Development

Intermediate Temperature Solid Oxide Fuel Cell Development Book
Author : Anonim
Publisher : Unknown
Release : 2008
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Solid oxide fuel cells (SOFCs) are high efficiency energy conversion devices. Present materials set, using yttria stabilized zirconia (YSZ) electrolyte, limit the cell operating temperatures to 800 C or higher. It has become increasingly evident however that lowering the operating temperature would provide a more expeditious route to commercialization. The advantages of intermediate temperature (600 to 800 C) operation are related to both economic and materials issues. Lower operating temperature allows the use of low cost materials for the balance of plant and limits degradation arising from materials interactions. When the SOFC operating temperature is in the range of 600 to 700 C, it is also possible to partially reform hydrocarbon fuels within the stack providing additional system cost savings by reducing the air preheat heat-exchanger and blower size. The promise of Sr and Mg doped lanthanum gallate (LSGM) electrolyte materials, based on their high ionic conductivity and oxygen transference number at the intermediate temperature is well recognized. The focus of the present project was two-fold: (a) Identify a cell fabrication technique to achieve the benefits of lanthanum gallate material, and (b) Investigate alternative cathode materials that demonstrate low cathode polarization losses at the intermediate temperature. A porous matrix supported, thin film cell configuration was fabricated. The electrode material precursor was infiltrated into the porous matrix and the counter electrode was screen printed. Both anode and cathode infiltration produced high performance cells. Comparison of the two approaches showed that an infiltrated cathode cells may have advantages in high fuel utilization operations. Two new cathode materials were evaluated. Northwestern University investigated LSGM-ceria composite cathode while Caltech evaluated Ba-Sr-Co-Fe (BSCF) based pervoskite cathode. Both cathode materials showed lower polarization losses at temperatures as low as 600 C than conventional manganite or cobaltite cathodes.

Development of New Materials for Intermediate temperature Solid Oxide Fuel Cells

Development of New Materials for Intermediate temperature Solid Oxide Fuel Cells Book
Author : Christophe T. G. Petit
Publisher : Unknown
Release : 2013
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

In this thesis, the main focus of the work is the development of novel materials for intermediate-temperature solid oxide fuel cells (IT-SOFCs) with an aim of showing suitability and compatibility with fuel cell system environment. Fuel cell fabrication was briefly encountered to test appropriateness with existing fuel cell element standards (yttrium-doped zirconia as electrolyte for high temperature operation and gadoliniumdoped ceria for IT-SOFCs) but due to the lack of appropriate component, extensive tests to determine full potential were not carried out. Methods such as solid-state reaction and sol-gel process were adopted for the synthesis of the materials and solid-solution limits were determined for the orthovanadate compounds studied. These latter were then reduced to their metavanadate counterpart in order to establish a possible cyclability between the two oxygenated forms that could be exploited in fuel cell mechanisms. Doped version of the former and latter with alkaline-earth elements were found to greatly increase stability and conductive behaviour while maintaining appropriate densification through the formation of closed pores in the orthovanadate structure allowing the metavanadate to benefit from increased conductance. Electrolyte studies were also carried out based on doped barium yttrium cerate/zirconate structures however compounds synthesised exhibited inappropriate properties for use in IT-SOFCs despite some interesting behaviours that would be a benefit in high-temperature electrolysers.

Intermediate Temperature Solid Oxide Fuel Cells

Intermediate Temperature Solid Oxide Fuel Cells Book
Author : Gurbinder Kaur
Publisher : Elsevier
Release : 2019-11-21
ISBN : 0128174463
Language : En, Es, Fr & De

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Book Description :

Intermediate Temperature Solid Oxide Fuel Cells: Electrolytes, Electrodes and Interconnects introduces the fundamental principles of intermediate solid oxide fuel cells technology. It provides the reader with a broad understanding and practical knowledge of the electrodes, pyrochlore/perovskite/oxide electrolytes and interconnects which form the backbone of the Solid Oxide Fuel Cell (SOFC) unit. Opening with an introduction to the thermodynamics, physiochemical and electrochemical behavior of Solid Oxide Fuel Cells (SOFC), the book also discusses specific materials, including low temperature brownmillerites and aurivillius electrolytes, as well as pyrochlore interconnects. This book analyzes the basic concepts, providing cutting-edge information for both researchers and students. It is a complete reference for Intermediate Solid Oxide Fuel Cells technology that will be a vital resource for those working in materials science, fuel cells and solid state chemistry. Provides a single source of information on glass, electrolytes, interconnects, vanadates, pyrochlores and perovskite SOFC Includes illustrations that provide a clear visual explanation of concepts being discussed Progresses from a discussion of basic concepts that will enable readers to easily comprehend the subject matter

Intermediate Temperature Solid Oxide Fuel Cells with a Metallic Interconnect

Intermediate Temperature Solid Oxide Fuel Cells with a Metallic Interconnect Book
Author : Anil V. Virkar
Publisher : Unknown
Release : 2002
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Intermediate Temperature Solid Oxide Fuel Cells with a Metallic Interconnect book written by Anil V. Virkar, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Endoscopic ultrasonography

Endoscopic ultrasonography Book
Author : Anonim
Publisher : Unknown
Release : 1995
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Samarium based Intermediate Temperature Solid Oxide Fuel Cells

Samarium based Intermediate Temperature Solid Oxide Fuel Cells Book
Author : Felipe Guzman Montanez
Publisher : Unknown
Release : 2005
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Samarium based Intermediate Temperature Solid Oxide Fuel Cells book written by Felipe Guzman Montanez, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Engineering High Performance Intermediate Temperature Solid Oxide Fuel Cells

Engineering High Performance Intermediate Temperature Solid Oxide Fuel Cells Book
Author : Jin Soo Ahn
Publisher : Unknown
Release : 2009
ISBN : 0987650XXX
Language : En, Es, Fr & De

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ABSTRACT: Solid oxide fuel cells (SOFCs) are an efficient, fuel flexible energy conversion device, capable of operating on fuels ranging from natural gas to gasoline, diesel, and biofuels, as well as hydrogen. However, to this point the marketability of SOFCs has been limited by their high operating temperatures. Achieving high power at intermediate temperatures (IT, 500 - 700 °C) would be a significant breakthrough, as low temperature operation would result in better stability and allow for a broader range of material options for the SOFC components as well as the balance of plant, such as stainless steel interconnects (which are only viable at

New Cathode Materials for Intermediate Temperature Solid Oxide Fuel Cells

New Cathode Materials for Intermediate Temperature Solid Oxide Fuel Cells Book
Author : Anonim
Publisher : Unknown
Release : 2005
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

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Development of New Electrolyte Material for Intermediate Temperature

Development of New Electrolyte Material for Intermediate Temperature Book
Author : Muralidharan Ramachandran
Publisher : Unknown
Release : 2006
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Development of New Electrolyte Material for Intermediate Temperature book written by Muralidharan Ramachandran, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Energetics of Intermediate Temperature Solid Oxide Fuel Cell Electrolytes

Energetics of Intermediate Temperature Solid Oxide Fuel Cell Electrolytes Book
Author : Salih Buyukkilic
Publisher : Unknown
Release : 2014
ISBN : 9781321014211
Language : En, Es, Fr & De

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Book Description :

Solid oxide fuel cells (SOFCs) have potential to convert chemical energy directly to electrical energy with high efficiency, with only water vapor as a by-product. However, the requirement of extremely high operating temperatures (~1000° C) limits the use of SOFCs to only in large scale stationary applications. In order to make SOFCs a viable energy solution, enormous effort has been focused on lowering the operating temperatures below 700° C. A low temperature operation would reduce manufacturing costs by slowing component degradation, lessening thermal mismatch problems, and sharply reducing costs of operation. In order to optimize SOFC applications, it is critical to understand the thermodynamic stabilities of electrolytes since they directly influence device stability, sustainability and performance. Rare-earth doped ceria electrolytes have emerged as promising materials for SOFC applications due to their high ionic conductivity at the intermediate temperatures (500 - 700° C). However there is a fundamental lack of understanding regarding their structure, thermodynamic stability and properties. Therefore, the enthalpies of formation from constituent oxides and ionic conductivities were determined to investigate a relationship between the stability, composition, structural defects and ionic conductivity in rare earth doped ceria systems. For singly doped ceria electrolytes, we investigated the solid solution phase of bulk Ce(1-x)Ln(x)O(2-0.5x) where Ln = Sm and Nd (0 [less than/equal to] x [less than/equal to] 0.30) and analyzed their enthalpies of formation, mixing and association, and bulk ionic conductivities while considering cation size mismatch and defect associations. It was shown that for ambient temperatures in the dilute dopant region, the positive heat of formation reaches a maximum as the system becomes increasingly less stable due to size mismatch. In concentrated region, stabilization to a certain solubility limit was observed probably due to the defect association of trivalent cations with charge-balancing oxygen vacancies. At higher temperatures near 700° C, maximum enthalpy of formation shifts toward higher dopant concentrations, as a result of defect disordering. This concentration coincides with that of maximum ionic conductivity, extending the correlation seen previously near room temperature. It is also possible to co-dope these systems with Sm and Nd to further enhance ionic conductivity. For doubly doped ceria electrolytes, the solid solution phase of Ce(1-x)Sm(0.5x)Nd(0.5x)O(2-0.5x) (0 [less than/equal to] x [less than/equal to] 0.30) was investigated. It has been shown that for doubly doped ceria, the maximum enthalpy of formation occurs towards higher dopant concentration than that of singly doped counterparts, with less exothermic association enthalpies. These studies provide insight into the structure-composition-property-stability relations and aid in the rational design of the future SOFCs electrolytes.

                                                                                    Book
Author : Anonim
Publisher : Unknown
Release : 2000
ISBN : 0987650XXX
Language : En, Es, Fr & De

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A Study of Perovskite Electrolytes and Electrodes for Intermediate temperature Solid Oxide Fuel Cell Applications

A Study of Perovskite Electrolytes and Electrodes for Intermediate temperature Solid Oxide Fuel Cell Applications Book
Author : Weitung Wang
Publisher : Unknown
Release : 1996
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Download A Study of Perovskite Electrolytes and Electrodes for Intermediate temperature Solid Oxide Fuel Cell Applications book written by Weitung Wang, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Materials System for Intermediate Temperature Solid Oxide Fuel Cell

Materials System for Intermediate Temperature Solid Oxide Fuel Cell Book
Author : Uday B. Pal,Srikanth Gopalan
Publisher : Unknown
Release : 2006
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

The objective of this work was to obtain a stable materials system for intermediate temperature solid oxide fuel cell (SOFC) capable of operating between 600-800 C with a power density greater than 0.2 W/cm{sup 2}. The solid electrolyte chosen for this system was La{sub 0.9}Sr{sub 0.1}Ga{sub 0.8}Mg{sub 0.2}O{sub 3}, (LSGM). To select the right electrode materials from a group of possible candidate materials, AC complex impedance spectroscopy studies were conducted between 600-800 C on symmetrical cells that employed the LSGM electrolyte. Based on the results of the investigation, LSGM electrolyte supported SOFCs were fabricated with La{sub 0.6}Sr{sub 0.4}Co{sub 0.8}Fe{sub 0.2}O{sub 3}-La{sub 0.9}Sr{sub 0.1}Ga{sub 0.8}Mg{sub 0.2}O{sub 3} (LSCF-LSGM) composite cathode and Nickel-Ce{sub 0.6}La{sub 0.4}O{sub 3} (Ni-LDC) composite anode having a barrier layer of Ce{sub 0.6}La{sub 0.4}O{sub 3} (LDC) between the LSGM electrolyte and the Ni-LDC anode. Electrical performance and stability of these cells were determined and the electrode polarization behavior as a function of cell current was modeled between 600-800 C. The electrical performance of the anode-supported SOFC was simulated assuming an electrode polarization behavior identical to the LSGM-electrolyte-supported SOFC. The simulated electrical performance indicated that the selected material system would provide a stable cell capable of operating between 600-800 C with a power density between 0.2 to 1 W/cm{sup 2}.

Composite cathodes for intermediate temperature solid oxide fuel cells

Composite cathodes for intermediate temperature solid oxide fuel cells Book
Author : Gopiraj Sivasundram
Publisher : Unknown
Release : 2006
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Download Composite cathodes for intermediate temperature solid oxide fuel cells book written by Gopiraj Sivasundram, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Interconnects for Intermediate Temperature Solid Oxide Fuel Cells

Interconnects for Intermediate Temperature Solid Oxide Fuel Cells Book
Author : Wenhua Huang
Publisher : Unknown
Release : 2008
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Interconnects for Intermediate Temperature Solid Oxide Fuel Cells book written by Wenhua Huang, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.