Дисертації з теми "Solid oxide electrolyser"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-50 дисертацій для дослідження на тему "Solid oxide electrolyser".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Tao, Gege. "Investigation of carbon dioxide electrolysis reaction kinetics in a solid oxide electrolyzer." Diss., The University of Arizona, 2003. http://hdl.handle.net/10150/289913.
Повний текст джерелаSANTANA, LEONARDO de P. "Estudo de conformacao de ceramicas a base de zirconia para aplicacao em celulas a combustivel do tipo oxido solido." reponame:Repositório Institucional do IPEN, 2008. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11727.
Повний текст джерелаMade available in DSpace on 2014-10-09T14:06:02Z (GMT). No. of bitstreams: 0
Dissertação (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
Anelli, Simone. "Advanced strategies for Solid Oxide Electrolysis cells." Doctoral thesis, Universitat Autònoma de Barcelona, 2021. http://hdl.handle.net/10803/671683.
Повний текст джерелаActualmente, la transición energética hacia un escenario bajo en carbono está impulsando la instalación global de fuentes de energía renovables, su despliegue por encima del 40%, implicará el uso de sistemas eficientes de almacenamiento de energía. Las rutas de hidrógeno verde y power to gas se presentan como la mejor alternativa para este almacenamiento. En este marco, las celdas de electrólisis de óxido sólido (SOEC), que producen hidrógeno y gas de síntesis (H2 + CO) a partir de la electrólisis del agua o la co-electrólisis del agua y el dióxido de carbono, son los electrolizadores más eficientes. Las SOEC poseen altas tasas de conversión de energía (≈80%) otorgadas por el rango de temperatura de operación (600-900 ° C). Sin embargo, uno de los principales inconvenientes de las SOEC está relacionado con las técnicas de fabricación, que implican muchos pasos para producir dispositivos completos. Además, sus prestaciones y durabilidad aún se están investigando para aumentar la madurez de la tecnología y penetrar en el mercado compitiendo con otras tecnologías de electrólisis que muestran menores eficiencias. La presente tesis está dedicada a la exploración de nuevos conceptos de SOEC. Para ello, se consideran tres aspectos, que son: i) utilización de técnicas de fabricación aditiva para la fabricación replicable, automática y sintonizable de dispositivos energéticos; ii) síntesis de nanocompuestos mesoporosos en el electrodo de oxígeno para mejorar el rendimiento general y la durabilidad del dispositivo SOEC; y finalmente iii) la producción de gas de síntesis por co-electrólisis y oxidación parcial de metano (POM) con los dispositivos desarrollados. Robocasting e Inkjet Printing se utilizaron para la fabricación de celdas simétricas impresas por tecnología híbridas de impresión 3D, co-sinterizadas a altas temperaturas y probadas electroquímicamente. Se ha demostrado la viabilidad de estas dos técnicas para la fabricación de dispositivos cerámicos. Se ha sintetizado ceria dopada mesoporosa (CGO) utilizada como soporte para electrodos de oxígeno nanocompuestos. Para ello se propone una ruta optimizada para mejorar la actividad catalítica de los electrodos de base mesoporosa y para reducir la temperatura de sinterización manteniendo su nanoestructura. La mejora del rendimiento de los dispositivos SOEC aplicando las rutas de síntesis y fabricación desarrolladas se demuestra por los excelentes resultados conseguidos, sin precedentes para este tipo de SOEC. El rendimiento de dispositivos completos con electrodos de oxígeno mesoporosos se probó a altas temperaturas. El soporte nanoestructurado optimizado ha sido probado en una celda botón (diámetro = 2 cm) mostrando excelentes rendimientos observados en condiciones de COSOEC y SOFC. También se depositó CGO mesoporoso en celdas de área grande (25 cm2) para demostrar la escalabilidad del material. Ambos dispositivos se sometieron a una prueba de durabilidad, que mostró tasas de degradación en línea con la literatura más avanzada. Finalmente, se muestra la prueba de conceptos sobre la oxidación parcial de metano (POM) asistida electroquímicamente. Se produjo y probó un SOEC con CGO infiltrado por catalizadores de Ni y Cu como dispositivo POM. Se usó metano en el electrodo Ni-Cu-CGO como combustible. El oxígeno producido por la reacción de electrólisis del agua en el electrodo Ni-YSZ se utilizó para producir gas de síntesis a partir de CH4 en un proceso catalítico asistido electroquímicamente. Los principios de funcionamiento del experimento se demostraron con éxito. Como resumen, el presente documento trata de la optimización de dispositivos electroquímicos innovadores de alta eficiencia como las SOEC, dando un nuevo paso más allá del estado del arte en las tecnologías de producción de hidrógeno debido a la combinación de rutas de fabricación innovadores, como la fabricación aditiva con materiales cerámicos de funcionalidades avanzadas como los mesoporosos.
Nowadays, the energy transition to a low carbon scenario is promoting the global installation of renewable energy sources, its deployment above 40% will need the use of efficient energy storage systems for covering the demand. Green hydrogen and power to gas routes has arisen as the best alternative for this storage while connecting the electric and gas grids. In this frame, Solid Oxide Electrolysis Cells (SOECs), which produce hydrogen and syngas (H2+CO) from the electrolysis of water or the co-electrolysis of water and carbon dioxide, are the most efficient electrolysers for energy storage. SOECs possess high energy conversion rates (≈80 %) granted by the operation temperature range (600-900 °C). However, one of SOECs’ main drawbacks is related to the manufacturing techniques, which involves many steps to produce complete devices. Furthermore, their performances and durability are still being investigated to increase the maturity of the technology and penetrate to the market competing with other electrolysis technologies that show lower efficiencies. The present thesis is dedicated to the exploration of new concepts of SOECs. For this, three aspects are considered, which are: i) utilization of additive manufacturing (AM) techniques for reliable, automatic and tuneable fabrication of energy devices; ii) synthesis of mesoporous nanocomposites at the oxygen electrode to improve the general performances and durability of SOEC device; an finally iii) the production of syngas by co-electrolysis and partial oxidation of methane (POM) with the developed devices. Robocasting (RC) and Inkjet Printing (IJP) were used for the fabrication of hybrid 3D printed symmetrical cells, which were co-sintered at high temperatures and electrochemically tested. The feasibility of these two combined techniques for the fabrication of ceramic devices was demonstrated. Mesoporous doped ceria (CGO) was synthesized and used as a scaffold for nanocomposite oxygen electrodes. An optimized route to improve the catalytic activity of the mesoporous based electrodes and to reduce the sintering temperature to maintain their nanostructure, is proposed after the study of their effects on the material. The improvement of the SOEC devices performance applying the developed synthesis and fabrication routes is demonstrated by the achievement of unprecedented results for this type of SOEC. The performance of complete devices with mesoporous oxygen electrodes was tested at high temperatures. The optimized scaffold tested on a button test cell (diameter =2 cm) promoted the commented outstanding performances in both co-electrolysis and fuel cell conditions. Mesoporous CGO was also deposited on large area cells (25 cm2) to demonstrate the scalability of the material, for devices of commercial interest. Both devices underwent a durability test, showing degradation rates in line with state-of-the-art literature. Finally, the proof of concepts about electrochemically assisted partial oxidation of methane (POM) is shown. A SOEC with CGO scaffold infiltrated by Ni and Cu catalysers was produced and tested as POM device. Methane was supplied at the Ni-Cu-CGO electrode as fuel. The oxygen produced by the water electrolysis reaction at the Ni-YSZ electrode was used to produce syngas from CH4 on an electrochemical assisted catalytic process. The working principles of the experiment were successfully demonstrated opening a new research line. As a summary the present document deals with the optimization of innovative high efficient electrochemical devices as SOEC, bringing a new step beyond the state of the art on the hydrogen production technologies due to the combination of innovative fabrication routes such as the additive manufacturing with advanced functional ceramic materials like mesoporous.
Hauch, Anne. "Solid oxide electrolysis cells : performance and durability /." Risø National Laboratory, 2007. http://www.risoe.dk/rispubl/reports/ris-phd-37.pdf.
Повний текст джерелаIacomini, Christine Schroeder. "Combined carbon dioxide/water solid oxide electrolysis." Diss., The University of Arizona, 2004. http://hdl.handle.net/10150/290073.
Повний текст джерелаGrieshammer, Steffen Paul [Verfasser], Manfred [Akademischer Betreuer] Martin, and Michael [Akademischer Betreuer] Schroeder. "Atomistic and macroscopic simulation of solid oxide electrolytes and electrolyzer cells / Steffen Paul Grieshammer ; Manfred Martin, Michael Schroeder." Aachen : Universitätsbibliothek der RWTH Aachen, 2015. http://d-nb.info/1128731126/34.
Повний текст джерелаGrieshammer, Steffen [Verfasser], Manfred [Akademischer Betreuer] Martin, and Michael [Akademischer Betreuer] Schroeder. "Atomistic and macroscopic simulation of solid oxide electrolytes and electrolyzer cells / Steffen Paul Grieshammer ; Manfred Martin, Michael Schroeder." Aachen : Universitätsbibliothek der RWTH Aachen, 2015. http://nbn-resolving.de/urn:nbn:de:hbz:82-rwth-2015-040481.
Повний текст джерелаFawcett, Lydia. "Electrochemical performance and compatibility of La2NiO4+δ electrode material with La0.8Sr0.2Ga0.8Mg0.2O3-δ electrolyte for solid oxide electrolysis". Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/24667.
Повний текст джерелаNelson, George Joseph. "Solid Oxide Cell Constriction Resistance Effects." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/10563.
Повний текст джерелаShin, J. Felix. "New electrolyte materials for solid oxide fuel cells." Thesis, University of Birmingham, 2012. http://etheses.bham.ac.uk//id/eprint/7607/.
Повний текст джерелаKosinski, Marcin Robert. "Nanomaterials for solid oxide fuel cell electrolytes and reforming catalysts." Thesis, University of St Andrews, 2011. http://hdl.handle.net/10023/2588.
Повний текст джерелаHernández, Rodríguez Elba María. "Solid Oxide Electrolysis Cells electrodes based on mesoporous materials." Doctoral thesis, Universitat de Barcelona, 2018. http://hdl.handle.net/10803/665269.
Повний текст джерелаUna de las principales desventajas de las fuentes de energías renovables es que producen energía eléctrica de forma discontinua. Los electrolizadores de alta temperatura basados en óxidos sólidos (SOEC) se presentan como una tecnología prometedora para el almacenamiento de energía eléctrica. Alcanzando eficiencias mayores de un 85%, los electrolizadores SOEC permite convertir energía eléctrica en energía química mediante la reducción de las moléculas de agua (H2O), dióxido de carbono (CO2), o la combinación de ambas; generándose hidrógeno (H2), monóxido de carbono (CO) o gas de síntesis (H2 +CO) como producto. El trabajo que se presenta en esta tesis tiene como objetico mejorar el rendimiento de los electrolizadores SOEC mediante la utilización de óxidos metálicos mesoporosos, caracterizados por poseer alta área superficial y ser estables a altas temperaturas. Esta tesis está organizada en ocho capítulos. Los capítulos 3, 4, 5, 6 y 7 presentan los resultados alcanzados: El capítulo 3 presenta la caracterización estructural de los materiales mesoporosos y de los electrodos fabricados. Además, la temperatura de adhesión del material mesoporoso ha sido optimizada y se ha fijado a 900 °C. El capítulo 4 compara electrolizadores fabricados soportados por el electrodo de combustible y por el electrolito. Los resultados muestran que las densidades de corriente más altas fueron inyectadas en los electrolizadores soportados por el electrodo de combustible, considerándose esta configuración la más apropiada. El capítulo 5 presenta la influencia de la microstructura de la intercara del electrodo de oxígeno en el rendimiento de los electrolizadores SOEC. La caracterización electroquímica, apoyada por la caracterización microestructural, ha demostrado que la máxima densidad de corriente ha sido inyectada por el electrolizador cuya barrera de difusión ha sido depositado por láser pulsado (PLD) y la capa funcional del electrodo de oxígeno mediante infiltración de materiales mesoporosos. El capítulo 6 estudia el electrodo de oxígeno optimizado. Durante 1400 h de operación continua y caracterización microstructural, se ha demostrado la estabilidad de este electrodo. Por último, el capítulo 7 muestra los resultados obtenidos del escalado de los electrodos mesoporosos en celdas de mayor área (25 cm2). La caracterización electroquímica muestra alta flexibilidad ante las composiciones de gases utilizadas, y estabilidad de los electrodos mesoporosos propuestos.
Eccleston, Kelcey Lynne. "Solid oxide steam electrolysis for high temperature hydrogen production /." St Andrews, 2007. http://hdl.handle.net/10023/322.
Повний текст джерелаBaron, 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.
Повний текст джерелаLewis, Gene Stacey. "Low temperature sintering of solid oxide fuel cell electrolytes." Thesis, Imperial College London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.402178.
Повний текст джерелаEccleston, Kelcey L. "Solid oxide steam electrolysis for high temperature hydrogen production." Thesis, University of St Andrews, 2007. http://hdl.handle.net/10023/322.
Повний текст джерелаNi, Meng. "Mathematical modeling of solid oxide steam electrolyzer for hydrogen production." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B39011409.
Повний текст джерелаNi, Meng, and 倪萌. "Mathematical modeling of solid oxide steam electrolyzer for hydrogen production." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B39011409.
Повний текст джерелаMahapatra, Manoj Kumar. "Study of Seal Glass for Solid Oxide Fuel/Electrolyzer Cells." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/77281.
Повний текст джерелаPh. D.
Lowrie, Fiona Louise. "Mechanical properties of a solid oxide fuel cell electrolyte." Thesis, Imperial College London, 1996. http://hdl.handle.net/10044/1/8664.
Повний текст джерелаSundin, Camilla. "Environmental Assessment of Electrolyzers for Hydrogen Gas Production." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-260069.
Повний текст джерелаVätgas har potential att spela en viktig roll som energibärare i framtiden med många användningsområden, såsom ett rent bränsle för transporter, uppvärmning, kraftförsörjning där elproduktion inte är lämpligt, med mera. Redan idag är vätgas ett viktigt inslag i flera industrier, där ibland raffinaderier och kemiska industrier. Det finns flera metoder för att producera vätgas, där reformering av naturgas är den största produktionsmetoden idag. I framtiden spås vätgasproduktion med elektrolys bli allt viktigare, då hållbara produktionsprocesser prioriteras allt mer. Idag används främst två elektrolysörtekniker, alkalisk och polymerelektrolyt. Utöver dessa är högtemperaturelektrolysörer också intressanta tekniker, där fastoxidelektrolysören är under utveckling och smältkarbonatelektrolysören är på forskningsstadium. I det här examensarbetet har en jämförande livscykelanalys utförts på alkalisk- och smältkarbonatelektrolysören. På grund av felaktiga indata för smältkarbonatelektrolysören har dessa resultat uteslutits från den publika rapporten. Miljöpåverkan från den alkaliska elektrolysören har sedan jämförts med miljöpåverkan från fastoxid- och polymerelektrolytelektrolysörerna. Systemgränserna sattes till vagga till grind. De livscykelsteg som inkluderats i studien är därmed råmaterialutvinning, elektrolysörtillverkning, vätgasproduktion och transporter mellan dessa steg. Den funktionella enheten valdes till 100 kg producerad vätgas. Resultaten visar att polymerelektrolytteknologin har den lägsta miljöpåverkan utav de tekniker som jämförts. Resultaten påvisar också att livstiden och strömtätheten för de olika teknikerna har signifikant påverkan på teknikernas miljöpåverkan. Dessutom fastslås att elektriciteten för vätgasproduktion har högst miljöpåverkan utav de studerade livscykelstegen. Därför är det viktigt att elektriciteten som används för vätgasproduktionen kommer ifrån förnybara källor.
de, Carvalho Tomás Eduarda M. S. "Characterisation of the ceria and yttria co-doped scandia zirconia, produced by an innovative sol-gel and combustion process." Thesis, University of St Andrews, 2010. http://hdl.handle.net/10023/931.
Повний текст джерелаWatton, James Peter William. "Performance and degradation of solid oxide cells for steam electrolysis." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7396/.
Повний текст джерелаAlquraini, Zahra. "Highly Conductive Solid Polymer Electrolytes: Poly(ethylene oxide)/LITFSI Blends." DigitalCommons@Robert W. Woodruff Library, Atlanta University Center, 2018. http://digitalcommons.auctr.edu/cauetds/145.
Повний текст джерелаPornprasertsuk, Rojana. "Ionic conductivity studies of solid oxide fuel cell electrolytes and theoretical modeling of an entire solid oxide fuel cell /." May be available electronically:, 2007. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.
Повний текст джерелаARAKAKI, ALEXANDER R. "Obtencao de ceramicas de ceria - samaria - gadolinia para aplicacao como eletrolito em celulas a combustivel de oxido solido (SOFC)." reponame:Repositório Institucional do IPEN, 2010. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9506.
Повний текст джерелаMade available in DSpace on 2014-10-09T14:06:53Z (GMT). No. of bitstreams: 0
Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
Kinney, Chris 1982. "Water modeling the solid oxide membrane electrolysis with rotating cathode process." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/32729.
Повний текст джерелаVita.
Includes bibliographical references (leaf 35).
The Kroll process for refining titanium is an expensive batch process which produces a final product that still requires intensive post processing to create usable titanium. A new process, Solid Oxide Membrane Electrolysis with Rotating Cathode (SOMERC) process is being explored. The SOMERC process is a continuous process that could produce large quantities of high quality titanium at a fraction of the cost of the Kroll process. This paper examines the fluid flow around the ingot in the SOMERC Process. A large shear between the ingot and surrounding fluid will create a fully-dense ingot instead of dendrites, because dendrites are undesirable. Using a camera, a plane of light and titanium dioxide particles, videos and pictures of the water were taken and analyzed to find how to create a large amount of shear between the ingot and the fluid. Out of the speeds tested, a rotation rate of 900Ê»/s for the ingot proved to create the most shear, and therefore the shear between the ingot and fluid increases with increasing rotation rate, making it more likely to suppress the formation of dendrites.
by Chris Kinney.
S.B.
Ma, Ying. "Ceria-based nanocomposite electrolyte for low-temperature solid oxide fuel cells." Licentiate thesis, KTH, Material Physics, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11626.
Повний текст джерелаSolid oxide fuel cells (SOFCs) have attracted much attention because of their potential of providing an efficient, environmentally benign, and fuel-flexible power generation system for both small power units and for large scale power plants. However, conventional SOFCs with yttria-stabilized zirconia (YSZ) electrolyte require high operation temperature (800-1000°C), which presents material degradation problems, as well as other technological complications and economic obstacles. Therefore, numerous efforts have been made to lower the operating temperature of SOFCs. The discovery of new electrolytes for low-temperature SOFCs (LTSOFCs) is a grand challenge for the SOFC community.
Nanostructured materials have attracted great interest for many different applications, due to their unusual or enhanced properties compared with bulk materials. As an example of enhanced property of nanomaterials, the enhancement of ionic conductivity in the nanostructured solid conductors, known as “nanoionics”, recently become one of the hottest fields of research related to nanomaterials, since they can be used in advanced energy conversion and storage applications, such as SOFC. So in this thesis, we are aiming at developing a novel nanocomposite approach to design and fabricate ceria-based composite electrolytes for LTSOFC. We studied two ceria-based nanocomposite systems with different SDC morphologies.
In the first part of the thesis, novel core-shell SDC/amorphous Na2CO3 nanocomposite was fabricated for the first time. The core-shell nanocomposite particles are smaller than 100 nm with amorphous Na2CO3 shell of 4~6 nm in thickness. The nanocomposite electrolyte shows superionic conductivity above 300 °C, where the conductivity reaches over 0.1 S cm-1. The thermal stability of such nanocomposite has also been studied based on careful XRD, BET, SEM and TGA characterization after annealing samples at various temperatures, which indicated that the SDC/Na2CO3 nanocomposite possesses better thermal stability on nanostructure than pure SDC. Such nanocomposite was applied in LTSOFCs with an excellent performance of 0.8 W cm-2 at 550 °C. The high performances together with notable thermal stability make the SDC/Na2CO3 nanocomposite as a potential electrolyte material for long-term SOFCs that operate at 500-600 °C.
In the second part of the thesis, we report a novel chemical synthetic route for the synthesis of samarium doped ceria (SDC) nanowires by homogeneous precipitation of lanthanide citrate complex in aqueous solutions as precursor followed by calcination. The method is template-, surfactant-free and can produce large quantities at low costs. To stabilize these SDC nanowires at high operation temperature, we employed the concept of “nanocomposite” by adding a secondary phase of Na2CO3, as inclusion which effectively hindered the grain growth of nanostructures. The SDC nanowires/Na2CO3 composite was compacted and sintered together with electrode materials, and was then tested for SOFCs performance. It is demonstrated that SOFCs using such SDC nanowires/Na2CO3 composite as electrolyte exhibited better performance compared with state-of-the-art SOFCs using conventional bulk ceria-based materials as electrolytes.
Wang, Xiaodi. "Ionic Conducting Composite as Electrolyte forLow Temperature Solid Oxide Fuel Cells." Licentiate thesis, KTH, Functional Materials, FNM, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-24723.
Повний текст джерелаSolid oxide fuel cells (SOFCs) are considered as one of the most promising powergeneration technologies due to their high energy conversion efficiency, fuel flexibilityand reduced pollution. The current SOFCs with yttria-stabilized zirconia (YSZ)electrolyte require high operation temperature (800-1000 °C), which not only hinderstheir broad commercialization due to associated high cost and technologicalcomplications. Therefore, there is a broad interest in reducing the operating temperatureof SOFCs. The key to development of low-temperature SOFCs (LTSOFCs) is to explorenew electrolyte materials with high ionic conductivity at such low temperature (300-600 °C).Recently, ceria-based composite electrolyte, consisting of doped cerium oxide mixedwith a second phase (e.g. Na2CO3), has been investigated as a promising electrolyte forLTSOFCs. The ceria-based composite electrolyte has shown a high ionic conductivityand improved fuel cell performance below 600 °C. However, at present the developmentof composite electrolyte materials and their application in LTSOFCs are still at an initialstage. This thesis aims at exploring new composite systems for LTSOFCs with superiorproperties, and investigates conductivity behavior of the electrolyte. Two compositesystems for SOFCs have been studied in the thesis.In the first system, a novel concept of non-ceria-salt-composites electrolyte, LiAlO2-carbonate (Li2CO3-Na2CO3) composite electrolyte, was investigated for SOFCs. TheLiAlO2-carbonate electrolyte exhibited good conductivity and excellent fuel cellperformances below 650 oC. The ion transport mechanism of the LiAlO2-carbonatecomposite electrolyte was studied. The results indicated that the high ionic conductivityrelates to the interface effect between oxide and carbonate.In the second system, we reported a novel core-shell samarium-doped ceria(SDC)/Na2CO3 nanocomposite which is proposed for the first time, since the interface isdominant in the nanostructured composite materials. The core-shell nanocompositeparticles are smaller than 100 nm with amorphous Na2CO3 shell. The nanocompositeelectrolyte was applied in LTSOFCs and showed excellent performance. Theconductivity behavior and charge carriers have been studied. The results indicated that H+conductivity in SDC/Na2CO3 nanocomposite is predominant over O2- conductivity with1-2 orders of magnitude in the temperature range of 200-600 °C. It is suggested that theinterface in composite electrolyte supplies high conductive path for proton, while oxygenions are most probably transported by the SDC nano grain interiors. Finally, a tentativemodel “swing mechanism” was proposed for explanation of superior proton conduction.
QC 20100930
Aman, Amjad. "Numerical Simulation of Electrolyte-Supported Planar Button Solid Oxide Fuel Cell." Master's thesis, University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5101.
Повний текст джерелаID: 031001387; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Adviser: .; Title from PDF title page (viewed May 22, 2013).; Thesis (M.S.M.E.)--University of Central Florida, 2012.; Includes bibliographical references (p. 101-107).
M.S.M.E.
Masters
Mechanical and Aerospace Engineering
Engineering and Computer Science
Mechanical Engineering; Thermofluids
Keenan, Philip J. "Synthesis of electrolyte and electrode materials for solid oxide fuel cells." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7162/.
Повний текст джерелаWang, Xiaodi. "Dual-ion Conducting Nanocompoiste for Low Temperature Solid Oxide Fuel Cell." Doctoral thesis, KTH, Funktionella material, FNM, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-95652.
Повний текст джерелаQC 20120529
Kimpton, Justin Andrew, and jkimpton@physics unimelb edu au. "Conductivity and microstructural characterisation of doped Zirconia-Ceria and Lanthanum Gallate electrolytes for the intermediate-temperature, solid oxide fuel cell." Swinburne University of Technology, 2002. http://adt.lib.swin.edu.au./public/adt-VSWT20060727.084311.
Повний текст джерелаGentile, Paul Steven. "Development of a novel high performance electrolyte supported solid oxide fuel cell." Thesis, Montana State University, 2007. http://etd.lib.montana.edu/etd/2007/gentile/GentileP1207.pdf.
Повний текст джерелаUdagawa, Jun. "Hydrogen production through steam electrolysis : model-based evaluation of an intermediate temperature solid oxide electrolysis cell." Thesis, Imperial College London, 2008. http://hdl.handle.net/10044/1/8310.
Повний текст джерелаVandana, Singh. "Development of High Performance Electrodes for High Temperature Solid Oxide Electrolysis Cells." 京都大学 (Kyoto University), 2016. http://hdl.handle.net/2433/215556.
Повний текст джерелаGratz, Eric. "Solid oxide membrane (SOM) stability in molten ionic flux for the direct electrolysis of magnesium oxide." Thesis, Boston University, 2013. https://hdl.handle.net/2144/12766.
Повний текст джерелаDirect electrolysis of magnesmm from its oxide is less expensive and more environmentally friendly than current methods of magnesium production. The solid oxide membrane (SOM) process is a viable method for production of magnesium via direct electrolysis. In the SOM process magnesium oxide is dissolved in a molten flux, which acts as a supporting electrolyte. A yttria stabilized zirconia (YSZ) membrane is immersed in the flux and separates the anode from the cathode. When an electrical potential is applied between electrodes, magnesium cations travel through the flux to a steel cathode where they are reduced. Simultaneously, oxygen anions travel through the YSZ to a liquid metal anode where they are oxidized. However, in order for the SOM process to be commercially successful it must run for thousands of hours at high current efficiencies. It is believed the degradation of the YSZ membrane determines the lifetime and operating costs of the SOM process. This study investigates the mechanisms of YSZ membrane degradation. There are two main pathways of YSZ degradation: 1) yttria (yttrium oxide) diffusion out of the membrane, and 2) electronic conductivity in the flux providing a pathway for the applied potential to reduce the YSZ membrane. It is shown through diffusion experiments that the loss of yttria from the membrane into the oxy-fluoride flux can be prevented by adding yttrium fluoride to the flux, so that the activity of yttria in the flux is equal to the activity of yttria in the membrane. The electronic conductivity then becomes the primary source of membrane degradation in the SOM process. Electronic conductivity lowers the current efficiency of the SOM process. It is shown through measurements that the electronic conductivity is reduced by lowering the magnesium solubility in the flux. This is accomplished by performing SOM electrolysis at a reduced pressure (<0.1 atm). When SOM electrolysis of magnesium oxide is carried out at reduced pressure, the membrane is not degraded and the current efficiency is high (>70%). Thus tlus process provides a basis for a successful commercial operation for the direct electrolysis of magnesium oxide.
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.
Повний текст джерелаYang, Xuedi. "Cathode development for solid oxide electrolysis cells for high temperature hydrogen production." Thesis, University of St Andrews, 2010. http://hdl.handle.net/10023/979.
Повний текст джерелаLiu, Xi. "Defect structure in yttrium, niobium and lead substituted bismuth oxide solid electrolytes." Thesis, Queen Mary, University of London, 2009. http://qmro.qmul.ac.uk/xmlui/handle/123456789/547.
Повний текст джерелаYue, Xiangling. "The development of alternative cathodes for high temperature solid oxide electrolysis cells." Thesis, University of St Andrews, 2013. http://hdl.handle.net/10023/6531.
Повний текст джерелаTang, Shijie. "Development of Multiphase Oxygen-ion Conducting Electrolytes for Low Temperature Solid Oxide Fuel Cells." Scholarly Repository, 2007. http://scholarlyrepository.miami.edu/oa_theses/112.
Повний текст джерелаSOUZA, EDUARDO C. C. de. "Relacao microestrutura-propriedades do eletrolito solido Cesub(1-x)Smsub(x)Osub2-delta preparado a partir de nanoparticulas." reponame:Repositório Institucional do IPEN, 2008. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9349.
Повний текст джерелаMade available in DSpace on 2014-10-09T14:00:18Z (GMT). No. of bitstreams: 0
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
FAPESP:04/00364-3
Clayton, Donald. "Characterization of Lithium Aluminum Oxide Solid Electrolyte Thin Films from Aqueous Precursors." Thesis, University of Oregon, 2018. http://hdl.handle.net/1794/23125.
Повний текст джерелаAgarwal, Vishal. "Sol-gel processing of barium cerate-based electrolyte films on porous substrates." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/14999.
Повний текст джерелаWaldbillig, David. "Aqueous suspension plasma spraying of yttria stabilized zirconia solid oxide fuel cell electrolytes." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/27910.
Повний текст джерелаGuan, Xiaofei. "Novel process for recycling magnesium alloy employing refining and solid oxide membrane electrolysis." Thesis, Boston University, 2013. https://hdl.handle.net/2144/11005.
Повний текст джерелаMagnesium is the least dense engineering metal, with an excellent stiffness-to-weight ratio. Magnesium recycling is important for both economic and environmental reasons. This project demonstrates feasibility of a new environmentally friendly process for recycling partially oxidized magnesium scrap to produce very pure magnesium at low cost. It combines refining and solid oxide membrane (SOM) based oxide electrolysis in the same reactor. Magnesium and its oxide are dissolved in a molten flux. This is followed by argon-assisted evaporation of dissolved magnesium, which is subsequently condensed in a separate condenser. The molten flux acts as a selective medium for magnesium dissolution, but not aluminum or iron, and therefore the magnesium collected has high purity. Potentiodynamic scans are performed to monitor the magnesium content change in the scrap as well as in solution in the flux. The SOM electrolysis is employed in the refining system to enable electrolysis of the magnesium oxide dissolved in the flux from the partially oxidized scrap. During the SOM electrolysis, oxygen anions are transported out of the flux through a yttria stabilized zirconia membrane to a liquid silver anode where they are oxidized. Simultaneously, magnesium cations are transported through the flux to a steel cathode where they are reduced. The combination of refining and SOM electrolysis yields close to 100% removal of magnesium metal from partially oxidized magnesium scrap. The magnesium recovered has a purity of 99.6w%. To produce pure oxygen it is critical to develop an inert anode current collector for use with the non-consumable liquid silver anode. In this work, an innovative inert anode current collector is successfully developed and used in SOM electrolysis experiments. The current collector employs a sintered strontium-doped lanthanum manganite (La0.8Sr0.2Mn03-δ or LSM) bar, an Inconel alloy 601 rod, and a liquid silver contact in between. SOM electrolysis experiments with the new LSM-Inconel current collector are carried out and performance comparable to the state-of-the-art SOM electrolysis for Mg production employing the non-inert anode has been demonstrated. In both refining and SOM electrolysis, magnesium solubility in the flux plays an important role. High magnesium solubility in the flux facilitates refining. On the other hand, lower magnesium solubility benefits the SOM electrolysis. The dissolution of magnesium imparts electronic conductivity to the flux. The effects of the electronic conductivity of the flux on the SOM electrolysis performance are examined in detail through experiments and modeling. Methods for mitigating the negative attributes of the electronic conductivity during SOM electrolysis are presented.
Berke, Ryan B. "Mechanical Characterization and Modeling of Solid Oxide Fuel Cell Electrolytes with Honeycomb Support." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1357079055.
Повний текст джерелаRicca, Chiara. "Combined theoretical and experimental study of the ionic conduction in oxide-carbonate composite materials as electrolytes for solid oxide fuel cells (SOFC)." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066623/document.
Повний текст джерелаOxide-carbonate composites are promising electrolytes for LT-SOFC, thanks to their high conductivity (0.1-1 S/cm at 600°C). A deeper understanding on the origins of their improved performances is still necessary. For this purpose, a combined theoretical and experimental approach was developed. We first studied systematically the conductivity of the material, measured through EIS, as a function of different oxide or carbonate phases and of the operating atmosphere. Results on YSZ- and CeO2-based materials indicate that by only taking into account the interfaces it is possible to rationalize some surprising observations, while reactivity issues have been observed for TiO2-carbonate composites. We then proposed a computational strategy based on periodic DFT calculations: we first studied the bulk structure of each phase so as to select an adequate computational protocol, which has then been used to identify a suitable model of the most stable surface for each phase. These surface models have thus been combined to obtain a model of the oxide-carbonate interface that through static DFT and MD provides a deeper insight on the interface at the atomic level. This strategy was applied to provide information on the structure, stability and electronic properties of the interface. YSZ-LiKCO3 was used as a case study to investigate the conduction mechanisms of different species. Results showed a strong influence of the interfaces on the transport properties. The TiO2-LiKCO3 model was, instead, used to investigate the reactivity of these materials. Overall, these results pave the way toward a deeper understanding of the basic operating principles of SOFC based on these materials
FLORIO, DANIEL Z. de. "Analise de eletrolitos de ZrO sub(2):Y sub(2) O sub(3) + B sub(2) O sub(3) e de eletrodos de La sub(0,8) Sr sub(0,2) Co sub (0,8) Fe sub (0,2) O sub (3-delta) por espectroscopia de impedancia." reponame:Repositório Institucional do IPEN, 2003. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11130.
Повний текст джерелаMade available in DSpace on 2014-10-09T13:59:46Z (GMT). No. of bitstreams: 1 09305.pdf: 5404217 bytes, checksum: 19eda8ad49f8cd247304fef0fb69c1bc (MD5)
Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP