The Experts below are selected from a list of 942 Experts worldwide ranked by ideXlab platform
M A Rahman - One of the best experts on this subject based on the ideXlab platform.
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development of high performance anode electrolyte cathode micro tubular solid oxide fuel cell via phase inversion based co extrusion co sintering technique
Journal of Power Sources, 2020Co-Authors: M A Rahman, Mohd Hafiz Dzarfan Othman, Hamzah Fansuri, Zawati Harun, Ahmad Maliki Omar, Hazrul Adzfar Shabri, Jeganes Ravi, Juhana Jaafar, Ahmad Fauzi IsmailAbstract:Abstract A complete set of triple-layer (anode/electrolyte/cathode) hollow fiber for high temperature micro-tubular solid oxide fuel cell (MT-SOFC) consisting of nickel oxide (NiO) – yttria-stabilized zirconia (YSZ)/YSZ/Lanthanum Strontium Manganite (LSM) – YSZ has been successfully fabricated in this study. A simplified fabrication technique of phase inversion-based co-extrusion/co-sintering has yielded a perfectly bounded sandwich structure with free-delamination and defect layers. The effect of co-sintering temperatures (1300 °C–1450 °C) on the morphologies, elemental distributions, electrolyte gas-tightness, mechanical strength, electrochemical performance and the impedance spectra test are well-inspected. The increase of co-sintering temperature has significant effects on the anode finger-like micro-channels shrinkage where the voids become very sharp-thin structure; and developing a thin gas-tight electrolyte layer. Whereas, rapid co-sintering rate (10 °C min−1) and large particle size of 3–5 μm (micron) of YSZ has hindered the formation of fully dense cathode layer resulting from higher co-sintering temperature. Correspondingly, with only 0.1116 Ωcm2 value of area-specific resistance (ASR), a maximum power density has increased from 0.34 W cm−2 to 0.75 W cm−2 with 1.05 V OCV at 700 °C when the co-sintering temperature ranging from 1400 °C to 1450 °C; which comparable with single-layer counterpart.
N M Sammes - One of the best experts on this subject based on the ideXlab platform.
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Fabrication and Characterization of Anode-Supported Planar Solid Oxide Fuel Cell Manufactured by a Tape Casting Process
'ASME International', 2018Co-Authors: Jh Song, N M Sammes, Sunil Park, Boo S, Ho-sung Kim, Moon H, Sang-hoon HyunAbstract:A planar anode-supported electrolyte was fabricated using a tape casting method that involved a single step cofiring process. A standard NiO/8YSZ cermet anode, 8 mol % YSZ electrolyte, and a Lanthanum Strontium Manganite cathode were used for the solid oxide fuel cell unit cell. A pressurized cofiring technique allows the creation of a thin layer of dense electrolyte about 10 mu m without warpage. The open circuit voltage of the unit cell indicated negligible fuel leakage through the electrolyte film due to the dense and crack-free electrolyte layer. An electrochemical test of the unit cell showed a maximum power density up to 0.173 W/cm(2) at 900 degrees C. Approximated electrochemical properties, e.g., activation energy, Ohmic resistance, and exchange current density, indicated that the cell performance was significantly influenced by the electrode properties of the unit cell.X11711sciescopu
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Fabrication and performance of anode-supported micro-tubular solid oxide fuel cells
'ASME International', 2018Co-Authors: Pusz J, Mohammadi A, N M SammesAbstract:A solid oxide fuel cell was fabricated using standard NiI/8YSZ cermet anode, 8 mol % yttria stabilized zirconia (YSZ) electrolyte, and Lanthanum Strontium Manganite cathode. The anodes were extruded using an hydraulic ram extruder An electrolyte was deposited using a novel technique allowing obtaining a 3-5 mu m thin and dense YSZ layer. The cathode was deposited by brush painting. The cells were operated under different temperature and fuel conditions, and showed excellent performance of up approximately 0.6 W cm(-2) at 890 degrees C. Performance data as well as scanning electron microscopy micrographs of the cells are presented.X111619sciescopu
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Design and Fabrication of a 100 W Anode Supported Micro-Tubular SOFC Stack
'Elsevier BV', 2018Co-Authors: N M Sammes, Du Y, Bove RAbstract:Micro-tubular solid oxide fuel cells (SOFC) systems have many desirable characteristics compared to their planar counter-parts, however there are many obstacles and difficulties that must be met to achieve a successful and economically viable manufacturing process and stack design. Anode supported tubes provide an excellent platform for individual cells. They allow for a thin electrolyte layer, which helps to minimize polarization losses, to be applied to the outside of the tube, thus avoiding the difficulty of coating the inside of an electrolyte or cathode supported tubes, or the stack design problem of having a fuel chamber if the anode is on the outside of the tube. This paper describes the fabrication of supporting anode tubes made of nickel and yttria stabilized zirconia (Ni-YSZ), coated with a thin YSZ electrolyte and a thin coat of Lanthanum Strontium Manganite/cobaltite (LSM) cathode. The finished tubes were then stacked in an array to provide the specific current/voltage requirements, using a brazing technique. A description of the output characteristics of the single cell, and the characteristics and main issues of a small stack (of 100 W, designed power output) are also given. (c) 2005 Elsevier B.V.. All rights reserved.X11254259sciescopu
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design and fabrication of a 100 w anode supported micro tubular sofc stack
Journal of Power Sources, 2005Co-Authors: N M Sammes, Roberto BoveAbstract:Abstract Micro-tubular solid oxide fuel cells (SOFC) systems have many desirable characteristics compared to their planar counter-parts, however there are many obstacles and difficulties that must be met to achieve a successful and economically viable manufacturing process and stack design. Anode supported tubes provide an excellent platform for individual cells. They allow for a thin electrolyte layer, which helps to minimize polarization losses, to be applied to the outside of the tube, thus avoiding the difficulty of coating the inside of an electrolyte or cathode supported tubes, or the stack design problem of having a fuel chamber if the anode is on the outside of the tube. This paper describes the fabrication of supporting anode tubes made of nickel and yttria stabilized zirconia (Ni-YSZ), coated with a thin YSZ electrolyte and a thin coat of Lanthanum Strontium Manganite/cobaltite (LSM) cathode. The finished tubes were then stacked in an array to provide the specific current/voltage requirements, using a brazing technique. A description of the output characteristics of the single cell, and the characteristics and main issues of a small stack (of 100 We designed power output) are also given.
Ahmad Fauzi Ismail - One of the best experts on this subject based on the ideXlab platform.
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development of high performance anode electrolyte cathode micro tubular solid oxide fuel cell via phase inversion based co extrusion co sintering technique
Journal of Power Sources, 2020Co-Authors: M A Rahman, Mohd Hafiz Dzarfan Othman, Hamzah Fansuri, Zawati Harun, Ahmad Maliki Omar, Hazrul Adzfar Shabri, Jeganes Ravi, Juhana Jaafar, Ahmad Fauzi IsmailAbstract:Abstract A complete set of triple-layer (anode/electrolyte/cathode) hollow fiber for high temperature micro-tubular solid oxide fuel cell (MT-SOFC) consisting of nickel oxide (NiO) – yttria-stabilized zirconia (YSZ)/YSZ/Lanthanum Strontium Manganite (LSM) – YSZ has been successfully fabricated in this study. A simplified fabrication technique of phase inversion-based co-extrusion/co-sintering has yielded a perfectly bounded sandwich structure with free-delamination and defect layers. The effect of co-sintering temperatures (1300 °C–1450 °C) on the morphologies, elemental distributions, electrolyte gas-tightness, mechanical strength, electrochemical performance and the impedance spectra test are well-inspected. The increase of co-sintering temperature has significant effects on the anode finger-like micro-channels shrinkage where the voids become very sharp-thin structure; and developing a thin gas-tight electrolyte layer. Whereas, rapid co-sintering rate (10 °C min−1) and large particle size of 3–5 μm (micron) of YSZ has hindered the formation of fully dense cathode layer resulting from higher co-sintering temperature. Correspondingly, with only 0.1116 Ωcm2 value of area-specific resistance (ASR), a maximum power density has increased from 0.34 W cm−2 to 0.75 W cm−2 with 1.05 V OCV at 700 °C when the co-sintering temperature ranging from 1400 °C to 1450 °C; which comparable with single-layer counterpart.
Kevin Kendall - One of the best experts on this subject based on the ideXlab platform.
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mixed reactant micro tubular solid oxide fuel cells an experimental study
Journal of Power Sources, 2009Co-Authors: Naveed Akhtar, S P Decent, Daniel Loghin, Kevin KendallAbstract:Abstract Anode-supported, micro-tubular solid oxide fuel cells were prepared and operated, utilizing mixed-reactant (methane and air mixture) supply. The cells were composed of conventional materials, i.e. nickel, yttria-stabilized zirconia (Ni-YSZ) as anode supported material, yttria-stabilized zirconia (YSZ) as electrolyte, and Lanthanum Strontium Manganite (LSM) as cathode material. The cells were operated at various temperatures in between 550 and 800 °C with varying methane/air ratio (1:1–1:4.76). Cell performance was found to be strongly dependent on flow rate and mixing ratio. At 750 °C, the maximum open circuit voltage (OCV) of the cell was 1.05 V at a methane/air ratio of 1:4.76, with a maximum power output of 122 mW cm −2 . The degradation test shows 0.05% performance loss per 24 h, thereafter, fluctuations in current density were observed due to oxidation–reduction cycles over nickel surface. It is therefore concluded that although the methane/air ratio of 1:4.76 gives the best performance but the long-term performance is not guaranteed under such conditions.
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a small solid oxide fuel cell demonstrator for microelectronic applications
Journal of Power Sources, 1998Co-Authors: Kevin Kendall, Michael G PalinAbstract:A key question relating to the application of solid oxide fuel cells (SOFCs) is the size of the smallest device which can be usefully operated. Previous studies have suggested that 1 kWe is the smallest power output that is reasonably attainable, with most applications in the larger power range around 200 kWe. In this paper we demonstrate that smaller SOFCs can be built, with possible applications to microelectronics and communications at remote sites where gas is available but batteries are expensive. Experiments are described on a three-cell device powered by butane. This was warmed up in minutes at a flow rate of 80 ml/min of butane to give an electrical output between 0.1 and 1 W. The cells were made of zirconium oxide extruded in thin-walled tube form, with nickel cermet anodes and Lanthanum Strontium Manganite cathodes.
Roberto Bove - One of the best experts on this subject based on the ideXlab platform.
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design and fabrication of a 100 w anode supported micro tubular sofc stack
Journal of Power Sources, 2005Co-Authors: N M Sammes, Roberto BoveAbstract:Abstract Micro-tubular solid oxide fuel cells (SOFC) systems have many desirable characteristics compared to their planar counter-parts, however there are many obstacles and difficulties that must be met to achieve a successful and economically viable manufacturing process and stack design. Anode supported tubes provide an excellent platform for individual cells. They allow for a thin electrolyte layer, which helps to minimize polarization losses, to be applied to the outside of the tube, thus avoiding the difficulty of coating the inside of an electrolyte or cathode supported tubes, or the stack design problem of having a fuel chamber if the anode is on the outside of the tube. This paper describes the fabrication of supporting anode tubes made of nickel and yttria stabilized zirconia (Ni-YSZ), coated with a thin YSZ electrolyte and a thin coat of Lanthanum Strontium Manganite/cobaltite (LSM) cathode. The finished tubes were then stacked in an array to provide the specific current/voltage requirements, using a brazing technique. A description of the output characteristics of the single cell, and the characteristics and main issues of a small stack (of 100 We designed power output) are also given.
