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Dissertations / Theses on the topic 'Solid oxide fuel cells Electrochemistry'

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Published: 4 June 2021

Last updated: 7 February 2022

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1

Jorgensen, Mette Juhl. "Lanthanum manganate based cathodes for solid oxide fuel cells." Thesis, Keele University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343243.

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2

Kirk, Thomas Jackson. "A solid oxide fuel cell using hydrogen sulfide with ceria-based electrolytes." Thesis, Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/11270.

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3

Torres-Caceres, Jonathan. "Manufacturing of Single Solid Oxide Fuel Cells." Master's thesis, University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5875.

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Solid oxide fuel cells (SOFCs) are devices that convert chemical energy into electrical energy and have the potential to become a reliable renewable energy source that can be used on a large scale. SOFCs have 3 main components; the electrolyte, the anode, and the cathode. Typically, SOFCs work by reducing oxygen at the cathode into O2- ions which are then transported via the electrolyte to the anode to combine with a fuel such as hydrogen to produce electricity. Research into better materials and manufacturing methods is necessary to reduce costs and improve efficiency to make the technology c

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4

Ni, Chengsheng. "Optimisation and testing of large ceramic-impregnated solid oxide fuel cells (SOFCs)." Thesis, University of St Andrews, 2014. http://hdl.handle.net/10023/6387.

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Solid oxide fuel cells (SOFCs) are the most efficient electrochemical devices to directly convert stored chemical energy to usable electrical energy. The infiltration of ceramic conductors and catalytic metals (e.g. Ni, Pt and Pd) into porous scaffolds that had been pre-sintered onto the electrolyte is regarded as an effective way of promoting the electrode performance via producing nano-scale particles by in-situ sintering at relatively low temperatures. Large-scale fuel cells (5 cm x 5 cm) are prepared with this method and tested to demonstrate its scalability so as to achieve industrial app

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5

Janardhanan, Vinod. "A detailed approach to model transport, heterogeneous chemistry, and electrochemistry in solid-oxide fuel cells." Karlsruhe : Univ.-Verl. Karlsruhe, 2007. http://d-nb.info/986289124/34.

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6

MAGAR, YOGESH NARESH. "CONVECTIVE COOLING AND THERMAL MANAGEMENT OPTIMIZATION OF PLANAR ANODE-SUPPORTED SOLID OXIDE FUEL CELLS." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1155839005.

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7

Janardhanan, Vinod [Verfasser]. "A detailed approach to model transport, heterogeneous chemistry, and electrochemistry in solid-oxide fuel cells / von Vinod Janardhanan." Karlsruhe : Univ.-Verl. Karlsruhe, 2007. http://d-nb.info/986289124/34.

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8

Henke, Moritz [Verfasser], and Andreas [Akademischer Betreuer] Friedrich. "Pressurised solid oxide fuel cells : from electrode electrochemistry to hybrid power plant system integration / Moritz Henke. Betreuer: Andreas Friedrich." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2016. http://d-nb.info/1082538108/34.

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9

Lynch, Matthew Earl. "Modeling, simulation, and rational design of porous solid oxide fuel cell cathodes." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/45852.

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This thesis details research performed in modeling, simulation, and rational design of porous SOFC cathodes via development, extension, and use of the key tools to aid in the fundamental understanding and engineering design of cathode materials. Phenomenological modeling of triple phase boundary (TPB) reactions and surface transport on La₁₋ₓSrₓMnO₃ (LSM) was conducted, providing insight into the role of the bulk versus surface oxygen reduction pathway and the role of sheet resistance in thin-film patterned electrode measurements. In response to observation of sheet resistance deactivation, a

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10

CHIBA, RUBENS. "Sintese, processamento e caracterizacao das meia-celulas de oxido solido catodo/eletrolito de manganito de lantanio dopado com estroncio/zirconia estabilizada com itria." reponame:Repositório Institucional do IPEN, 2010. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9503.

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Made available in DSpace on 2014-10-09T12:27:23Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:06:51Z (GMT). No. of bitstreams: 0<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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11

VENKATA, PADMA PRIYA. "Computational Modeling of Heat and Mass Transfer in Planar SOFC: Effects of Volatile Species/Oxidant Mass Flow Rate and Electrochemical Reaction Rate." University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1205169104.

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12

Junior, Roberto Janny Teixeira. "On governing equations and closure relations for the multiscale modeling of concentration polarization in solid-oxide fuel cells: mass transfer and concentration-induced voltage losses." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-07112017-075939/.

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The aim of this dissertation is to appraise and critically reflect on the physical pertinence of governing equations and closure relations often used for the modeling of gas-phase transport phenomena in high-temperature solid-oxide fuel cells (SOFCs). More precisely, this work conducts a critical literature review on the concentration-induced voltage losses (i.e., concentration polarization) resulting from mass transfer limitations. Thus, the overall object of this work was to stress awareness of the limits of mathematical models studied and developed in the SOFC literature to date, and which

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13

Feng, Shi. "Elucidation of hydrogen oxidation kinetics on metal/proton conductor interface." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/48941.

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High temperature proton conducting perovskite oxides are very attractive materials for applications in electrochemical devices, such as solid oxide fuel cells (SOFCs) and hydrogen permeation membranes. A better understanding of the hydrogen oxidation mechanism over the metal/proton conductor interface, is critical for rational design to further enhance the performances of the applications. However, kinetic studies focused on the metal/proton system are limited, compared with the intensively studied metal/oxygen ion conductor system, e.g., Ni/YSZ (yttrium stabilized zirconia, Zr₁-ₓYₓO₂-δ). This

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14

Henson, Luke John. "Solid oxide fuel cells." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610397.

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15

Lee, Won Yong S. M. Massachusetts Institute of Technology. "Modeling of solid oxide fuel cells." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/38564.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2006.<br>Includes bibliographical references (p. 107-110).<br>A comprehensive membrane-electrode assembly (MEA) model of Solid Oxide Fuel Cell (SOFC)s is developed to investigate the effect of various design and operating conditions on the cell performance and to examine the underlying mechanisms that govern their performance. We review and compare the current modeling methodologies, and develop an one-dimensional MEA model based on a comprehensive approach that include the dusty-gas model (DGM) for gas tran

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16

Chien, Chang-Yin. "Methane and Solid Carbon Based Solid Oxide Fuel Cells." University of Akron / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=akron1299670407.

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17

Simo, Frantisek. "Novel oxide materials for solid oxide fuel cells applications." Thesis, University of Liverpool, 2014. http://livrepository.liverpool.ac.uk/19353/.

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The work of this thesis focuses on three perovskite-based compounds: YSr2Cu3−xCoxO7+δ cuprates, Gd2BaCo2O5+δ related phases and Sr2SnO4 Ruddlesden-Popper structures. Both YSr2Cu3−xCoxO7+δ and Gd2BaCo2O5+δ are cathode material candidates for solid oxide fuel cells (SOFCs). Doping of Sr2SnO4 aims to enhance the ionic conductivity of the parent phase and explore the phases as a potential SOFCs electrolyte material. The cobalt content in the layered perovskite YSr2Cu3−xCoxO7+δ has been increased to a maximum of x = 1.3. A slight excess of strontium was required for phase purity in these phases, yi

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18

Johnson, Janine B. "Fracture Failure of Solid Oxide Fuel Cells." Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4847.

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Among all existing fuel cell technologies, the planar solid oxide fuel cell (SOFC) is the most promising one for high power density applications. A planar SOFC consists of two porous ceramic layers (the anode and cathode) through which flows the fuel and oxidant. These ceramic layers are bonded to a solid electrolyte layer to form a tri-layer structure called PEN (positive-electrolyte-negative) across which the electrochemical reactions take place to generate electricity. Because SOFCs operate at high temperatures, the cell components (e.g., PEN and seals) are subjected to harsh environment

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19

Thomas, Martin Lutz Reiner. "Multiscale Simulations of Solid Oxide Fuel Cells." Thesis, University of Leeds, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.534443.

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20

Fagg, Duncan Paul. "Anodes for SOFCs (solid oxide fuel cells)." Thesis, University of Aberdeen, 1996. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU082955.

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The success of Solid Oxide Fuel Cells (S.O.F.C) rests heavily on material selection. The performances of several compounds were investigated as possible anode materials, starting with reduced titanates such as the magnesium titanate and zirconium titanate. These compositions, although possessing many qualities beneficial for use as an anode material, were found to be too unstable for practical use. For this reason further work concentrated on stable, zirconia based, compounds with exhibited mixed conduction under reducing atmospheres. The mobility of electronic carriers is considered to be muc

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21

Sarantaridis, Dimitrios. "Redox cycling of solid oxide fuel cells." Thesis, Imperial College London, 2008. http://hdl.handle.net/10044/1/11898.

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22

Sun, Baoguo. "Thermal Cycling of Solid Oxide Fuel Cells." Thesis, Imperial College London, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.486561.

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Solid-oxide fuel cells (SOFCs) are energy conversion devices that theoretically have the capability of producing electrical- energy for as long as the fuel and oxidant are supplied to the electrodes and perfonnance is expected for at least 40,000 hours. However, it is observed that perfonnance degrades under repeated thennal cycling conditions, which limits the practicaI.operating life of these SOFCs. Therefore, the mechanism of damage to planar and integrated planar SOFCs (IPt' SOFCs) on thennal cycling is the subject of this thesis. A detailed literature review has been carried out and a mec

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23

Nelson, George Joseph. "Solid Oxide Cell Constriction Resistance Effects." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/10563.

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Solid oxide cells are best known in the energy sector as novel power generation devices through solid oxide fuel cells (SOFCs), which enable the direct conversion of chemical energy to electrical energy and result in high efficiency power generation. However, solid oxide electrolysis cells (SOECs) are receiving increased attention as a hydrogen production technology through high temperature electrolysis applications. The development of higher fidelity methods for modeling transport phenomena within solid oxide cells is necessary for the advancement of these key technologies. The proposed th

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24

Pramuanjaroenkij, Anchasa. "Mathematical Analysis of Planar Solid Oxide Fuel Cells." Scholarly Repository, 2009. http://scholarlyrepository.miami.edu/oa_dissertations/234.

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The mathematical analysis has been developed by using finite volume method, experimental data from literatures, and solving numerically to predict solid oxide fuel cell performances with different operating conditions and different material properties. The in-house program presents flow fields, temperature distributions, and performance predictions of typical solid oxide fuel cells operating at different temperatures, 1000 C, 800 C, 600 C, and 500 C, and different electrolyte materials, Yttria-Stabilized zirconia (YSZ) and Gadolinia-doped ceria (CGO). From performance predictions show that the

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25

Bulut, Basar. "Second Law Analysis Of Solid Oxide Fuel Cells." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1219161/index.pdf.

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In this thesis, fuel cell systems are analysed thermodynamically and electrochemically. Thermodynamic relations are applied in order to determine the change of first law and second law efficiencies of the cells, and using the electrochemical relations, the irreversibilities occuring inside the cell are investigated. Following this general analysis, two simple solid oxide fuel cell systems are examined. The first system consists of a solid oxide unit cell with external reformer. The second law efficiency calculations for the unit cell are carried out at 1273 K and 1073 K, 1 atm and 5 atm, and b

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26

Cooper, Richard John. "Flow and reaction in solid oxide fuel cells." Thesis, University of Birmingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367622.

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27

Payne, Clare Elizabeth Ann. "Novel fabrication techniques for solid oxide fuel cells." Thesis, Brunel University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318427.

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28

Yoon, Jongsik. "Nanostructured thin films for solid oxide fuel cells." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-3164.

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29

Shin, J. Felix. "New electrolyte materials for solid oxide fuel cells." Thesis, University of Birmingham, 2012. http://etheses.bham.ac.uk//id/eprint/7607/.

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Two general systems, brownmillerite-type Ba₂In₂O₅ and apatite-type silicates have been investigated for potential solid oxide fuel cell electrolyte applications. The combination of powder diffraction, NMR, TGA, Raman and AC impedance spectroscopy indicated the successful incorporation of phosphate, sulphate and silicate into the Ba₂In₂O₅ structure leading to a transition from an ordered brownmillerite-type structure to a disordered perovskite-type, which led to the conductivity enhancement below 800 °C, along with a significant protonic contribution in wet atmospheres. The CO₂ stability was al

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30

Almutairi, Ghzzai. "Ageing of integrated-planar solid Oxide Fuel Cells." Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4422/.

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The ageing of Solid Oxide Fuel Cells (SOFCs) is a key problem because of the requirement of 50,000 hours to their lifetime in many applications. At present, such performance is still not attainable because degradation occurs at more than 1% per thousand hours under practical test conditions. In this thesis, the ageing of the Rolls Royce Fuel Cell Systems (RRFCS)Integrated Planar Solid Oxide Fuel Cell (IP-SOFC) was studied under different operating conditions, especially by accelerated degradation testing (ADT), in order to investigate the fuel cell stability and degradation behaviour under non

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31

Sandells, Jamie Ian. "Mathematical modelling of planar solid oxide fuel cells." Thesis, University of Birmingham, 2014. http://etheses.bham.ac.uk//id/eprint/4908/.

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In this thesis we construct a series of mathematical models from first principles to examine the advection, diffusion and reactions of species within a planar Solid Oxide Fuel Cell (SOFC). We reduce the complexity of an SOFC to flow and reaction across a flat, impermeable plate and begin by establishing a simplistic model for the incompressible, isothermal flow and reaction of hydrogen. Throughout the thesis we seek to extend this initial model by adding appropriate levels of complexity such as alternative fuels, compressibility and thermal effects. In establishing solutions to these models we

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32

Preece, John Christopher. "Oxygenated hydrocarbon fuels for solid oxide fuel cells." Thesis, University of Birmingham, 2006. http://etheses.bham.ac.uk//id/eprint/117/.

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In order to mitigate the effects of climate change and reduce dependence on fossil fuels, carbon-neutral methods of electricity generation are required. Solid oxide fuel cells (SOFCs) have the potential to operate at high efficiencies, while liquid hydrocarbon fuels require little or no new infrastructure and can be manufactured sustainably. Using hydrocarbons in SOFCs introduces the problem of carbon deposition, which can be reduced or eliminated by judicious choice of the SOFC materials, the operating conditions or the fuel itself. The aim of this project was to investigate the relationships

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33

Guzman, Montanez Felipe. "SAMARIUM-BASED INTERMEDIATE TEMPERATURE SOLID OXIDE FUEL CELLS." University of Akron / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=akron1134056820.

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34

Parihar, Shailendra S. "High Temperature Seals for Solid Oxide Fuel Cells." University of Cincinnati / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1172490697.

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35

Kobayashi, Teruaki. "Development of materials for solid oxide fuel cells." Kyoto University, 2008. http://hdl.handle.net/2433/135588.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(エネルギー科学)<br>甲第13953号<br>エネ博第174号<br>新制||エネ||40(附属図書館)<br>UT51-2008-C869<br>京都大学大学院エネルギー科学研究科エネルギー基礎科学専攻<br>(主査)教授八尾健, 教授萩原理加, 准教授日比野光宏<br>学位規則第4条第1項該当

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36

Wei, Xingguo. "Current distribution materials for solid oxide fuel cells." Thesis, Imperial College London, 2004. http://hdl.handle.net/10044/1/11527.

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37

Hart, Nigel T. "Functionally graded interfaces for solid oxide fuel cells :." Thesis, Brunel University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.445940.

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38

Mirzababaei, Jelvehnaz. "Solid Oxide Fuel Cells with Methane and Fe/Ti Oxide Fuels." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1415461807.

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39

Willich, Caroline [Verfasser]. "Local Characterisation of Solid Oxide Fuel Cells / Caroline Willich." Aachen : Shaker, 2013. http://d-nb.info/1051574064/34.

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40

Aruppukottai, Muruga Bhupathi Saranya. "Integrating nanoionics concepts in micro solid oxide fuel cells." Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/362363.

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Fuel cells are one of the promising technology at present to meet the growing demand of clean energy and technology. Among the different varieties of fuel cells, Solid Oxide Fuel Cell (SOFC) research is advancing towards the device miniaturization (called “micro-SOFC” with thin film components) with the operation temperature in the range ≈ 500°C to 700°C for portable device application. In SOFC components, cathode causes major polarization loss due to the sluggishness of oxygen reduction reaction (ORR) at low operating temperature that would affect the device efficiency. To rectify this th

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41

Arespacochaga, Santiago Nicolás de. "Sewage biogas energy valorization via solid oxide fuel cells." Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/345237.

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A more sustainable and secure energy supply is required for the forthcoming generations; where the actual dependence on the fossil fuel reserves should be replaced by self-sufficiency and use of renewable energy resources. Conventional sewage treatment is an energy consuming process, or more specifically, an electricity consuming process. Notwithstanding, energy on Waste Water Treatment Plants is not only considered in terms of consumption reduction, but also in terms of production of renewable energy in form of biogas. Today, achieving energy self-sufficiency is limited by the low electrical

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42

Zalar, Frank M. "Model and theoretical simulation of solid oxide fuel cells." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1189691948.

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43

Beckel, Daniel. "Thin film cathodes for micro solid oxide fuel cells." kostenfrei, 2007. http://e-collection.ethbib.ethz.ch/view/eth:29741.

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44

Baron, Sylvia A. "Anodes for solid oxide fuel cells with ceria electrolytes." Thesis, Imperial College London, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.410219.

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45

Kerman, Kian. "Ultra-thin solid oxide fuel cells: materials and devices." Thesis, Harvard University, 2014. http://dissertations.umi.com/gsas.harvard:11418.

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Solid oxide fuel cells are electrochemical energy conversion devices utilizing solid electrolytes transporting O2- that typically operate in the 800 - 1000 °C temperature range due to the large activation barrier for ionic transport. Reducing electrolyte thickness or increasing ionic conductivity can enable lower temperature operation for both stationary and portable applications. This thesis is focused on the fabrication of free standing ultrathin (<100 nm) oxide membranes of prototypical O2- conducting electrolytes, namely Y2O3-doped ZrO2 and Gd2O3-doped CeO2. Fabrication of such membranes r

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46

Cheng, Jeremy. "Effects of ion irradiation on solid oxide fuel cells /." May be available electronically:, 2007. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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47

Hao, Yong Goodwin David G. Goodwin David G. "Numerical study of single-chamber solid oxide fuel cells /." Diss., Pasadena, Calif. : California Institute of Technology, 2007. http://resolver.caltech.edu/CaltechETD:etd-05252007-110313.

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48

Akhtar, Naveed. "Single-chamber solid oxide fuel cells : modelling and experiments." Thesis, University of Birmingham, 2010. http://etheses.bham.ac.uk//id/eprint/626/.

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The objective of this work is to compare the performance of different geometries (i.e. planar, coplanar and micro tubular) under single-chamber (mixed-reactant) solid oxide fuel cell (SC-SOFC) conditions. In this respect, these designs have been computer analyzed and it is found that the micro-tubular design eliminates the possibility of cross diffusion/convection from the counter electrode, which is an inherent disadvantage in planar and co-planar designs. This is the first experimental report describing that the micro-tubular design offers the highest fuel utilization, cell efficiency and an

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49

Dikwal, Chinnan Maclean. "Cycling studies of micro-tubular solid oxide fuel cells." Thesis, University of Birmingham, 2009. http://etheses.bham.ac.uk//id/eprint/299/.

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A major problem of solid oxide fuel cells (SOFCs) is their long term durability under cyclic operation, for example during start-up and shutdown, where cracking can occur. The objective of this project is to understand these mechanisms of cyclic degradation for micro-tubular SOFC, then to set-up experiments to measure the degradation in terms of the drop in electrochemical performance and subsequently confirming the theories by dilatometry and scanning electron microscopy (SEM). In conclusion, the methods and conditions for minimizing degradation in SOFC have been put forward. First, a theory

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50

Wright, Eileen. "End-of-life management of solid oxide fuel cells." Thesis, Loughborough University, 2011. https://dspace.lboro.ac.uk/2134/9103.

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This thesis reports on research undertaken to investigate the end-of-life management of solid oxide fuel cells (SOFC), through the definition of a framework and the development of a multicriteria evaluation methodology which together support comparison of alternative end-of-life scenarios. The primary objective of this research is to develop an understanding of the challenges and opportunities arising during the end-of-life phase of the technology, such that any conflicts with end-of-life requirements might be addressed and opportunities for optimising the end-of-life phase fully exploited. Th

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