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Showing 1 to 20 of 109 for “"SOFC"”.
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Investigation and Improvement of SofC Composite Cathodes
… performance, and long term stability of SOFC composite cathodes prepared by infiltration methods. The majority of the work that follows aims to improve the understanding of the processes contributing to cathode deactivation and to propose strategies to lessen the extent of this …
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Layered perovskites as cathode materials for IT-SOFC
… region. The maximum power density of single-cell SOFCs fabricated with the La₀.₉Ln₀.₉Sr₀.₂CuO₄ (Ln= Sm & Gd) cathodes, La₀.₉Sr₀.₁Ga₀.₈Mg₀.₂O₃-δ (LSGM-9182) electrolyte, and Ni–Ce₀.₉Gd₀.₁O₁.₉₅ cermet anode exhibit 720 and 824 mWcm-² at 800 °C respectively. The phase pure T* Nd₁.₃₂Ce₀.27Sr₀.₄₁CuO₄-δ …
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Tailoring Superconductor and SOFC Structures for Power Applications
… (HTS) and solid oxide fuel cells (SOFCs) both offer the possibility for dramatic improvements in efficiency in power applications such as generation, transmission and use of electrical energy. However, production costs and energy losses prohibit widespread adoption of these …
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Sintering of Co2MnO4 spinel for protective coatings in SOFC
Protective coatings are often deposited on SOFC interconnectors to avoid poisoning of cathode from chromium species that evaporate from stainless steel interconnects or supports. Co2MnO4 spinel compounds are usually considered as the main constituent of protection barriers. Nevertheless, such …
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Dynamic modelling of SOFC marine power systems and shipboard applications
… types of fuel cells, the Solid Oxide Fuel Cell (SOFC) tops others in terms of energy conversion efficiency as it can be fed with both hydrogen rich fuels and traditional fossil fuels after being chemically reformed. These features make it most promising to meet the large power demands of seagoing …
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Untersuchungen zu den Eigenschaften der Anode der Festoxid-Brennstoffzelle (SOFC)
… of anodes of the solid oxide fuel cell (SOFC). A model is suggested, which describes the impedance spectra of symmetrical anode cells. According to this, the series resistance in the spectra is caused by the resistance of the electrolyte (YSZ), ohmic parts of the anodes, which are …
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Computational and empirical thermal modelling of a proposed SOFC stack housing design
Solid oxide fuel cells (SOFC) generate electricity cleanly, efficiently and quietly. There has been much effort in commercialising planar and large tubular SOFCs in the past two decades. Some research has involved modelling the mass, thermal and electrical energy flows in SOFC stack designs. Due to …
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Mathematical Modeling of An Anode-Supported Micro-Tubular Sofc Powered by Ammonia
… is presented for anode-supported micro-tubular SOFCs with ammonia as the fuel. This two-dimensional (2D) mathematical model consists of a set of equations that describe the conservation of heat, mass, momentum and charge, which are solved simultaneously by COMSOL MULTIPHYSICS 4.1a. We …
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Configuration and Operating Condition Design Analysis of SOFC Systems for Building Applications
… of the energy storage device in the modeling of SOFC cogeneration systems, the environmental assessment of the system such as the air pollutant emission performance, the lifecycle assessment (LCA) of SOFC systems from manufacturing stage through the abolition stage and the faster execution time …
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Νέα υλικά ανόδου κελιών καυσίμου στερεού ηλεκτρολύτη (sofc) - παρασκευή, χαρακτηρισμός και έλεγχος ιδιοτήτων
… των κελιών καυσίμου στερεού ηλεκτρολύτη, SOFCs (Solid Oxide Fuel Cells). Ένα από τα μειονεκτήματα που εμφανίζονται κατά την μακρόχρονη λειτουργία ενός ‘state of the art’ κελιού καυσίμου αποτελούμενο από Ni/8YSZ (8 mol% Y2O3 stabilized ZrO2) κεραμομεταλλικό (άνοδος) - 8YSZ (ηλεκτρολύτης) - …
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Semicelle SOFC: studio e produzione di elettroliti con processi a basso impatto ambientale
Le celle a combustibile ad ossido solido (SOFC) sono dei sistemi elettrochimici in grado di trasformare direttamente l’energia chimica di un combustibile (generalmente H2) e di un comburente (O2) in energia elettrica, senza l’intervento intermedio di un ciclo termico. Le SOFCs rappresentano un …
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Characterisation of anode supported microtubular SOFC process on pure methane reduction and operation
… on pure methane were studied. A major problem of SOFCs is nickel anode performance on methane and higher hydrocarbons. The aim of this work was to study the effect of reduction and operation of anode-supported microtubular SOFCs using methane as both reductant and fuel. The results were compared …
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Theoretical and experimental study of solid oxide fuel cell (SOFC) using impedance spectra
Solid oxide fuel cell (SOFC) is a promising alternative energy source, with its advantages of high operating efficiency, fuel flexibility, low emissions and relatively low cost. However, there are several challenges concerning the SOFC research. Little is known about the complex interfacial …
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Thermomechanical properties and performance of microfabricated solid oxide fuel cell ([mu]SOFC) structures
… thermomechanically stable microfabricated SOFCs (SOFCs) at high operation temperature. YSZ films of 70-600nm thickness were deposited at either room temperature or high temperature (500/600°C) on substrates of either silicon, or silicon nitride. The residual film stresses varied from -700 …
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Production of single cell anode-supported SOFC using NiO/YSZ-YSZ-LSM/YSZ powder materials
Solid oxide fuel cell (SOFC) is an energy conversion device that converts gas into electricity directly. The components consist of anode, electrolyte and cathode which have different properties and operate at high temperatures up to 1000 οC. SOFC requires a thin, robust, porous anode, dense …
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Experimental and modeling analysis of n-hexane, 2,3 dimethylbutane and cyclohexane: implications for SOFC operation
Includes bibliographical references (pages 181-186).
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Investigation into the improved dispersion of nickel oxide over the surface of SOFC tubular anodes
… nickel agglomeration and reduced porosity of SOFC anode tubes have been noted in previous investigations using carbon black as a porosity forming agent, this thesis looks at methods of improving these issues by investigation of alternative materials (carbon, graphite, flour) along with …
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Flash-Sintering of MnCo2O4 and (La, Sr)(Co, Fe)O3 Ceramics for Potential Application in SOFC
The innovative flash-sintering technique has been considered to investigate the effect of DC electric field on sintering and electrical conductivity of two oxide ceramics MnCo2O4 and La0.6Sr0.4Co0.2 Fe0.8O3 (LSCF). These oxides are renowned for their high electrical conductivity and oxygen …
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Characterization and control of non-stoichiometry in Pr₀.₁Ce₀.₉O₂-[d̳e̳l̳t̳a̳] thin films : correlation with SOFC electrode performance
While the properties of functional oxide thin films often depend strongly on oxygen nonstoichiometry (6), there have been few means available for its measurement and control in a reliable and in-situ fashion. In this work, we investigate means for extracting the oxygen nonstoichiometry of dense …
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Formulation and Process of Powder Coating for Solid Oxide Fuel Cell Interconnects
Solid oxide fuel cell (SOFC) interconnects, which are made of chromia-forming ferritic stainless steels, are used to connect individual SOFCs in series to increase the overall cell voltage output. They are usually exposed to high operating temperature (around 800oC) and both oxidative and reductive …
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