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Relevant bibliographies by topics / Lanthanum chromite; Fuel cells

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Academic literature on the topic 'Lanthanum chromite; Fuel cells'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Lanthanum chromite; Fuel cells"

1

Armstrong, T. R. "Optimizing Lanthanum Chromite Interconnects for Solid Oxide Fuel Cells." ECS Proceedings Volumes 1999-19, no. 1 (January 1999): 706–15. http://dx.doi.org/10.1149/199919.0706pv.

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Nishiyama, Haruo, Masanobu Aizawa, Harumi Yokokawa, Teruhisa Horita, Natsuko Sakai, Masayuki Dokiya, and Tatsuya Kawada. "Stability of Lanthanum Calcium Chromite‐Lanthanum Strontium Manganite Interfaces in Solid Oxide Fuel Cells." Journal of The Electrochemical Society 143, no. 7 (July 1, 1996): 2332–41. http://dx.doi.org/10.1149/1.1837002.

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3

Vernoux, P. "Lanthanum chromite as an anode material for solid oxide fuel cells." Ionics 3, no. 3-4 (May 1997): 270–76. http://dx.doi.org/10.1007/bf02375628.

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4

Ruiz-Morales, J. C., H. Lincke, D. Marrero-López, J. Canales-Vázquez, and P. Núñez. "Cromitas de Lantano como potencial electrodos simétricos para Pilas de Combustible de Óxido Sólido." Boletín de la Sociedad Española de Cerámica y Vidrio 46, no. 4 (August 30, 2007): 218–24. http://dx.doi.org/10.3989/cyv.2007.v46.i4.240.

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Lee, Seung-Bok, Seuk-Hoon Pi, Jong-Won Lee, Tak-Hyoung Lim, Seok-Joo Park, Rak-Hyun Song, Chong-Ook Park, and Dong-Ryul Shin. "Lanthanum Chromite Based Ceramic and Glass Composite Interconnects for Solid Oxide Fuel Cells." ECS Transactions 35, no. 1 (December 16, 2019): 2547–52. http://dx.doi.org/10.1149/1.3570253.

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Oh, Tae-Sik, Anthony S. Yu, Lawrence Adijanto, Raymond J. Gorte, and John M. Vohs. "Infiltrated lanthanum strontium chromite anodes for solid oxide fuel cells: Structural and catalytic aspects." Journal of Power Sources 262 (September 2014): 207–12. http://dx.doi.org/10.1016/j.jpowsour.2014.03.141.

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7

Sun, Y. F., M. N. Wang, and J. L. Luo. "Nickel Doped Lanthanum Chromite Perovskite: A Novel Regenerable Anode Material for Solid Oxide Fuel Cells." ECS Transactions 68, no. 1 (July 17, 2015): 1455–63. http://dx.doi.org/10.1149/06801.1455ecst.

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8

Jiang, San Ping, Lan Zhang, and Yujun Zhang. "Lanthanum strontium manganese chromite cathode and anode synthesized by gel-casting for solid oxide fuel cells." Journal of Materials Chemistry 17, no. 25 (2007): 2627. http://dx.doi.org/10.1039/b701339f.

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Sun, Y. F., M. N. Wang, and J. L. Luo. "In-Situ Exsolution of Nano Transition Metal Particles on Lanthanum Chromite Perovskite Anode for Solid Oxide Fuel Cells." ECS Transactions 68, no. 1 (July 17, 2015): 1541–48. http://dx.doi.org/10.1149/06801.1541ecst.

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Yamanaka, Ichiro, and Yuta Nabae. "Direct Oxidation of Dry Methane by Pd-Ni Synergy Catalyst Supported on Lanthanum Chromite Based Anode." Advances in Science and Technology 45 (October 2006): 2067–76. http://dx.doi.org/10.4028/www.scientific.net/ast.45.2067.

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Steady generation of electricity (360 mW cm-2 at 1173 K) with dry methane fuel was successfully performed in solid oxide fuel cells (SOFC) by Pd-Ni bimetallic catalyst on porous composite anode prepared from La0.8Sr0.2CrO3 (LSCr) and Ce0.8Sm0.2O1.9 (SDC) (50:50 wt%). The amounts of carbon deposition were quite small under the open and closed circuit conditions. Synergy of Pd and Ni electrocatalysts was observed on the LSCr-SDC anode for the oxidation of dry methane. A small amount of carbon deposition over the anode during the open circuit conditions could be easily and quickly removed by gasification with steam. Data of detailed kinetic studies and electrochemical analysis strongly suggest that (i) methane decompose to hydrogen and carbon over the Pd-Ni catalyst, (ii) hydrogen is electrochemically oxidized with O2- to water, and (iii) carbon is quickly reformed with water to hydrogen and carbon oxides.

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Dissertations / Theses on the topic "Lanthanum chromite; Fuel cells"

1

Morelli, Marcio Raymundo. "Liquid phase sintering of perovskite." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297279.

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SETZ, LUIZ F. G. "Obtencao de Lasub(1-x)Srsub(x)Crsub(1-y)Cosub(y)Osub(3) por reacao de combustao." reponame:Repositório Institucional do IPEN, 2005. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11237.

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Intituto de Pesquisas Energeticas e Nucleares, IPEN/CNEN-SP

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SETZ, LUIZ F. G. "Processamento coloidal de cromito de lantanio." reponame:Repositório Institucional do IPEN, 2009. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11522.

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Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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4

Huang, Ming-Hsien. "Preparation of some Mg-doped lanthanum chromites for solid oxide fuel cell applications." Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/46828.

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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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Esquirol, Audrey. "Characterisation of doped lanthanum ferrite cathodes for intermediate temperature solid oxide fuel cells." Thesis, Imperial College London, 2003. http://hdl.handle.net/10044/1/12007.

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Zheng, Feng. "Phase stability and processing of Sr and Mg doped lanthanum gallate /." Thesis, Connect to this title online; UW restricted, 2000. http://hdl.handle.net/1773/10604.

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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.

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Lowering the operating temperature of the high-temperature, solid oxide fuel cell (SOFC) improves both the thermodynamic efficiency and the lifetime of this energy efficient technology. Unfortunately the rate of oxygen-ion transport through the solid electrolyte is temperature dependent, and materials previously employed as electrolytes in the high-temperature SOFC perform poorly at intermediate temperatures. Therefore new oxygen-ion conductors with enhanced ionic conductivity at intermediate temperatures are required. The bulk of the existing literature on high-temperature SOFCs has focussed on zirconia-based binary systems as electrolytes, due to their high ionic conductivity and negligible electronic conductivity. Only select compositions within the zirconia-scandia system have demonstrated acceptable ionic conductivity levels at intermediate temperatures; however unstable phase assemblage and the high economic cost of scandia are clear disadvantages. Ceria-based binary systems have demonstrated improved oxygen-ion conductivity at intermediate temperature compared to many zirconia systems, however significant levels of n-type electronic conductivity are observed at low oxygen partial pressures. Consequently it was thought unlikely that significant increases in ionic conductivity would be found in existing zirconia- and ceria-based binary systems, therefore another approach was required in an attempt to improve the performance of these established fluorite systems. The fluorite systems Zr0.75Ce0.08M0.17O1.92 (M = Nd, Sm, Gd, Dy, Ho, Y, Er, Yb, Sc) were prepared and investigated as possible, intermediate-temperature SOFC electrolytes in an attempt to combine the higher conductivity found in the ceria systems with the low electronic conductivity observed in the zirconia systems. Also it was anticipated that systems containing dopants not previously observed to confer high ionic conductivity in either zirconia- and ceria-based binary systems, might exhibit enhanced ionic conductivity with expansion of the zirconia lattice resulting from the addition of ceria. All the as-fired Zr0.75Ce0.08M0.17O1.92 compositions possessed the face-centred cubic structure and lattice parameter measurements revealed the anticipated unit cell enlargement as the size of the dopant cation increased. No unusual microstructural parameters were identified that could be expected to interfere with the ionic transport properties in the as-fired compositions. The electrical conductivity was found to be influenced by the dopant-ion radius, the presence of ceria, low oxygen partial pressures and, in some compositions, the formation of poorly conducting, ordered-pyrochlore microdomains dispersed amongst the cubic defect-fluorite matrix. In a second approach to the formulation of new oxygen-ion conductors suitable for the intermediate-temperature SOFC, compounds possessing structures other than the fluorite structure were considered. An examination of the literature for oxides having the pyrochlore, scheelite and perovskite structures showed that the Sr+2- and Mg+2-doped LaGaO3 perovskites (LSGM) possessed ionic conductivity equal to the highest conducting, zirconia and ceria binary compounds. Therefore the perovskite systems La0.9Sr0.1Ga(0.8-x)InxMg0.2O2.85 (X = 0, 0.05, 0.1, 0.2, 0.4, 0.6, 0.8) (I-LSGM) were prepared and examined, the objective being to favourably influence structural parameters believed responsible for optimal ionic conductivity, namely the unit cell symmetry and volume. It was found that In+3 systematically substituted for Ga+3 on to the B-site of LSGM at least up to the X = 0.4 composition. While In+3 was found to replace the Ga+3 as expected, Mg+2, which occupies the same crystallographic site, was also replaced by In+3. Up to the X = 0.2 composition, at least two trace level secondary phases were observed to form along with the bulk I-LSGM phase. For I-LSGM compositions with X > 0.2, significantly larger concentrations of the secondary phases were identified. Evidence of a strontium-rich, high-temperature liquid phase was observed also near the grain boundaries on as-sintered and thermally etched surfaces in LSGM and I-LSGM compositions. It is believed that the observed, high sintered density in the complex, doped-LaGaO3 systems is due to the formation of this high-temperature liquid phase. Increasing levels of diffuse scatter and superstructure formation were observed in electron diffraction patterns in the I-LSGM bulk phase (up to X = 0.2), indicating a possible decrease in vacancy concentration and reduced, localised unit cell symmetry. The electrical conductivity in the I-LSGM compositions was believed to be influenced by the distortion of the oxygen-ion conduction path, a reduction in vacancy concentration, formation of stronger dopant-vacancy associates at low temperature and the presence of ordered structures. In addition, phase instability, in the form of subtle ordering in specific crystalline planes, was observed to influence the electrical conductivity as a function of time at intermediate temperatures.

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Price, Robert. "Metal/metal oxide co-impregnated lanthanum strontium calcium titanate anodes for solid oxide fuel cells." Thesis, University of St Andrews, 2018. http://hdl.handle.net/10023/16018.

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Solid Oxide Fuel Cells (SOFC) are electrochemical energy conversion devices which allow fuel gases, e.g. hydrogen or natural gas, to be converted to electricity and heat at much high efficiencies than combustion-based energy conversion technologies. SOFC are particularly suited to employment in stationary energy conversion applications, e.g. micro-combined heat and power (μ-CHP) and base load, which are certain to play a large role in worldwide decentralisation of power distribution and supply over the coming decades. Use of high-temperature SOFC technology within these systems is also a vital requirement in order to utilise fuel gases which are readily available in different areas of the world. Unfortunately, the limiting factor to the long-term commercialisation of SOFC systems is the redox instability, coking intolerance and sulphur poisoning of the state-of-the-art Ni-based cermet composite anode material. This research explores the ‘powder to power' development of alternative SOFC anode catalyst systems by impregnation of an A-site deficient La0.20Sr0.25Ca0.45TiO3 (LSCT[sub](A-)) anode ‘backbone' microstructure with coatings of ceria-based oxide ion conductors and metallic electrocatalyst particles, in order to create a SOFC anode which exhibits high redox stability, tolerance to sulphur poisoning and low voltage degradation rates under operating conditions. A 75 weight percent (wt. %) solids loading LSCT[sub](A-) ink, exhibiting ideal properties for screen printing of thick-film SOFC anode layers, was screen printed with 325 and 230 mesh counts (per inch) screens onto electrolyte supports. Sintering of anode layers between 1250 °C and 1350 °C for 1 to 2 hours indicated that microstructures printed with the 230 mesh screen provided a higher porosity and improved grain connectivity than those printed with the 325 mesh screen. Sintering anode layers at 1350 °C for 2 hours provided an anode microstructure with an advantageous combination of lateral grain connectivity and porosity, giving rise to an ‘effective' electrical conductivity of 17.5 S cm−1 at 850 °C. Impregnation of this optimised LSCT[sub](A-) anode scaffold with 13-16 wt. % (of the anode mass) Ce0.80Gd0.20O1.90 (CGO) and either Ni (5 wt. %), Pd, Pt, Rh or Ru (2-3 wt. %) and integration into SOFC resulted in achievement of Area Specific Resistances (ASR) of as low as 0.39 Ω cm−2, using thick (160 μm) 6ScSZ electrolytes. Durability testing of SOFC with Ni/CGO, Ni/CeO2, Pt/CGO and Rh/CGO impregnated LSCT[sub](A-) anodes was subsequently carried out in industrial button cell test rigs at HEXIS AG, Winterthur, Switzerland. Both Ni/CGO and Pt/CGO cells showed unacceptable levels of degradation (14.9% and 13.4%, respectively) during a ~960 hour period of operation, including redox/thermo/thermoredox cycling treatments. Significantly, by exchanging the CGO component for the CeO2 component in the SOFC containing Ni, the degradation over the same time period was almost halved. Most importantly, galvanostatic operation of the SOFC with a Rh/CGO impregnated anode for >3000 hours (without cycling treatments) resulted in an average voltage degradation rate of < 1.9% kh−1 which, to the author's knowledge, has not previously been reported for an alternative, SrTiO3-based anode material. Finally, transfer of the Rh/CGO impregnated LSCT[sub](A-) anode to industrial short stack (5 cells) scale at HEXIS AG revealed that operation in relevant conditions, with low gas flow rates, resulted in accelerated degradation of the Rh/CGO anode. During a 1451 hour period of galvanostatic operation, with redox cycles and overload treatments, a voltage degradation of 19.2% was observed. Redox cycling was noted to briefly recover performance of the stack before rapidly degrading back to the pre-redox cycling performance, though redox cycling does not affect this anode detrimentally. Instead, a more severe, underlying degradation mechanism, most likely caused by instability and agglomeration of Rh nanoparticles under operating conditions, is responsible for this observed degradation. Furthermore, exposure of the SOFC to fuel utilisations of >100% (overloading) had little effect on the Rh/CGO co-impregnated LSCT[sub](A-) anodes, giving a direct advantage over the standard HEXIS SOFC. Finally, elevated ohmic resistances caused by imperfect contacting with the Ni-based current collector materials highlighted that a new method of current collection must be developed for use with these anode materials.

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CHIBA, RUBENS. "Obtencao e caracterizacao de manganito de lantanio dopado com estroncio para aplicacao em celulas a combustivel de oxido solido." reponame:Repositório Institucional do IPEN, 2005. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11234.

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IPEN/D
Intituto de Pesquisas Energeticas e Nucleares, IPEN/CNEN-SP

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Books on the topic "Lanthanum chromite; Fuel cells"

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Gore, Russell Bryan. The relationship of minor phase concentration to sintering densification of Sr and Ca doped LaCrO₃ and YCrO₃. 1993.

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Book chapters on the topic "Lanthanum chromite; Fuel cells"

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Setz, L. F. G., H. P. S. Correa, C. Yamagata, and S. R. H. Mello-Castanho. "Synthesis and Sintering Behavior of Lanthanum Chromite Doped with Strontium and Cobalt for SOFC Interconnect Applications." In Advances in Solid Oxide Fuel Cells III, 237–54. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2009. http://dx.doi.org/10.1002/9780470339534.ch23.

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Belda, Charif, Egle Dietzen, Mihails Kusnezoff, Nikolai Trofimenko, Uladimir Vashook, Alexander Michaelis, and Ulrich Guth. "Interaction of perovskite type lanthanum-calcium-chromites-titanates La1−xCaxCr1−yTiyO3−δwith solid electrolyte materials." In Advances in Solid Oxide Fuel Cells X, 41–53. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119040637.ch5.

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Yamada, T., N. Chitose, H. Eto, M. Yamada, K. Hosoi, N. Komada, T. Inagaki, et al. "Application of Lanthanum Gallate Based Oxide Electrolyte in Solid Oxide Fuel Cell Stack." In Advances in Solid Oxide Fuel Cells III, 79–89. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2009. http://dx.doi.org/10.1002/9780470339534.ch9.

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Yoshida, Hiroyuki, Mitsunobu Kawano, Koji Hashino, Toru Inagaki, Hiroshi Deguchi, Yoshiyuki Kubota, and Kei Hosoi. "Evaluation of the Residual Stress Profiles of Practical Size Lanthanum Gallate-Based Cells in Radial Direction." In Advances in Solid Oxide Fuel Cells IV, 125–35. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2009. http://dx.doi.org/10.1002/9780470456309.ch12.

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Hu, Boxun, Manoj K. Mahapatra, Vinit Sharma, Rampi Ramprasad, Nguyen Minh, Scott Misture, and Prabhakar Singh. "Durability Of Lanthanum Strontium Cobaltferrite ((La0.60Sr0.40)0.95(Co0.20Fe0.80)O3-x) Cathodes In CO2And H2O Containingair." In Advances in Solid Oxide Fuel Cells and Electronic Ceramics, 75–82. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119211501.ch8.

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Chiba, Rubens, Reinaldo Azevedo Vargas, Marco Andreoli, and Emília Satoshi Miyamaru Seo. "Solid Oxide Fuel Cells: Strontium-Doped Lanthanum Manganite Obtained by the Citrate Technique." In Materials Science Forum, 643–48. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-423-5.643.

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Yamada, T., N. Chitose, H. Etou, M. Yamada, K. Hosoi, N. Komada, T. Inagaki, et al. "Development of Solid Oxide Fuel Cell Stack Using Lanthanum Gallate-Based Oxide as an Electrolyte." In Advances in Solid Oxide Fuel Cells II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 4, 16–25. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470291337.ch2.

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PARK, SUN-YOUNG, HO-IL JI, HAE-RYOUNG KIM, KYUNG JOONG YOON, JI-WON SON, HAE-WEON LEE, and JONG-HO LEE. "EFFECT OF LANTHANUM-STRONTIUM-COBALTITE CATHODE CURRENT-COLLECTING LAYER ON THE PERFORMANCE OF ANODE SUPPORTED TYPE PLANAR SOLID OXIDE FUEL CELLS." In Solid State Ionics, 198–203. WORLD SCIENTIFIC, 2012. http://dx.doi.org/10.1142/9789814415040_0024.

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Conference papers on the topic "Lanthanum chromite; Fuel cells"

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Eguchi, Koichi, and Ryuji Kikuchi. "Development of Solid Oxide Fuel Cells and the Component Materials." In ASME 2004 2nd International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2004. http://dx.doi.org/10.1115/fuelcell2004-2500.

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In addition to the high conversion efficiency, the solid oxide fuel cell (SOFC) is quite attractive from the viewpoint of fuel flexibility, especially the possibility of internal reforming of methane and other hydrocarbons for power generation. The systems with several kW to tens kW-class modules have been successfully operated and tested in Japan. The SOFC systems with internal steam reforming reaction over a Ni-YSZ anode or pressurized condition have been tested as a suitable operation mode. Methane internal reforming proceeded without deterioration with time, whereas the power generation with ethane and ethylene suffered from carbon deposition even at high steam-to-carbon ratio. Carbon deposition region and equilibrium partial pressure of oxygen in the C-H-O diagram were estimated from the thermodynamic data. Reduced temperature SOFC operation is another approach, especially for small scale applications, in which scandia-stabilized zirconia, lanthanum gallate, or rare earth-doped ceria were employed as candidate for the electrolyte.

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Lassman, Alexander, Alevtina Smirnova, and Nigel Sammes. "An Investigation of Doped Perovskites Based on La, Pr, and Sm Ferrites as Cathode Materials for Solid Oxide Fuel Cells." In ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/fuelcell2008-65153.

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Perovskites with the composition ABO3 have been studied as cathode candidate materials for solid oxide fuel cells. Both the A and B sites can be doped. This paper investigates ABO3 perovskites in which the A site ion is lanthanum (La), praseodymium (Pr), or samarium (Sm), doped with strontium (Sr). The B site ion is iron (Fe) doped with cobalt (Co) or nickel (Ni). Powders were prepared by the glycine-nitrate process, and were calcined at temperatures between 700°C and 900°C. XRD analysis was performed to determine the effect of calcination temperature on structure. Cathode pellets were made and sintered at 1200°C for 4 hours. The electrical conductivity of these pellets was measured, in ambient air, at temperatures ranging from 200°C to 800°C. The measured conductivity was generally higher for the ferrite-nickelates than the ferrite-cobaltites. Additionally, the samples with lanthanum as the A site cation demonstrated higher electrical conductivity than those with samarium or praseodymium.

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Mohammadi, Alidad, Alevtina L. Smirnova, and Nigel M. Sammes. "Mechanical Properties of LSGM as an Electrolyte for Solid Oxide Fuel Cells." In ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/fuelcell2008-65151.

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Strontium- and magnesium-doped lanthanum gallate (LSGM) due to its high ionic conductivity and chemical stability over a wide range of oxygen partial pressures and temperatures has been considered as an alternative electrolyte for solid oxide fuel cell (SOFC) systems. Mechanical properties of LSGM electrolyte layer however need to be well studied. An overview of mechanical behavior of LSGM on an all-perovskite SOFC is presented in this work. Dense La0.8Sr0.2Ga0.7Mg0.3O2.8 electrolyte pellets were studied. Mechanical properties, such as hardness, elastic modulus, fracture toughness, and modulus of rupture (MOR) of the electrolyte pellets at different sintering temperatures were measured and correlated with the SEM morphological characterization. Samples sintered for 2h at 1500°C demonstrated slightly enhanced mechanical properties than those sintered at 1450°C and 1400°C.

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Xu, Zhigang, Devdas Pai, and Jag Sankar. "Processing of Composite Cathode and YSZ Coatings for Solid Oxide Fuel Cells." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-61012.

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In our research, composite cathodes of strontium-doped lanthanum manganite (LSM) and yttria-stabilized zirconia (YSZ) were produced by using slurry casting and sintering procedures. The slurry was prepared using ball milling. The time of ball milling was studied in terms of particle size and homogeneity of the powder in the slurry. The effect of the composition of the slurry on the microstructure was studied to obtain cathodes with desired porosity. The sintering process was also optimized to compromise the porosity, grain size, and strength of the cathodes. The YSZ coating was implemented using electrophoretic deposition in liquid phase. Different charging methods of the YSZ powder in the suspension was used and their results were compared. The microstructures of cathodes and YSZ coatings were characterized using scanning electron microscope (SEM).

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Absah, H. Q. H. H., S. A. M. Ali, M. Anwar, A. M. Abdalla, A. H. Karim, M. R. Somali, J. Y. Park, and A. K. Azad. "Synthesis and Characterization of La9.95Ba0.05Si5.8Zn0.2O26.775 Co-doped Lanthanum Silicate Electrolyte For Intermediate Temperature Solid Oxide Fuel Cells." In 7th Brunei International Conference on Engineering and Technology 2018 (BICET 2018). Institution of Engineering and Technology, 2018. http://dx.doi.org/10.1049/cp.2018.1544.

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Akhtar, Naveed, Stephen P. Decent, Daniel Loghin, and Kevin Kendall. "Modelling of Co-Planar Type Single-Chamber Solid Oxide Fuel Cells (SC-SOFCs)." In ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/fuelcell2008-65150.

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A two dimensional, non-isothermal numerical model of a single-chamber solid oxide fuel cell (SC-SOFC) has been developed. For the sake of simplicity in developing the model, hydrogen-air mixture (80% hydrogen, 20% air by volume which is considered as safe) has been chosen instead of hydrocarbon-air mixtures (which require complex modelling strategy such as reforming via partial oxidation, modelling of two active fuels, i.e. hydrogen and carbon monoxide). The model is based on considering yttria-stabilized zirconia (YSZ) as electrolyte supported material, nickel yttria-stabilized zirconia (Ni-YSZ) as anode and lanthanum strontium manganite (LSM) as cathode material. Effect of varying distance between anode and cathode, flow rate, temperature, porosity and electrolyte thickness has been investigated in terms of electrochemical performance. It has been found that the flow rate and distance between the electrodes pair are the most sensitive parameters in such type of fuel cells. The model was coded in a commercial software package of finite element analysis, i.e. COMSOL Multiphysics, 3.3a.

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Tucker, David, Ayyakkannu Manivannan, Dan Haynes, Harry Abernathy, Nick Miller, Karon Wynne, and Angine´s Matos. "Evaluating Methods for Infiltration of LSCF Cathodes With Mixed Electric/Ionic Conductors for Improved Oxygen Exchange." In ASME 2010 8th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2010. http://dx.doi.org/10.1115/fuelcell2010-33214.

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Infiltration methods for improving lanthanum strontium cobalt ferrite (LSCF) cathode performance through catalyst surface modification were evaluated at the U.S. Department of Energy, National Energy Technology Laboratory. Infiltration of mixed conductors into LSCF cathodes of solid oxide fuel cells promises a low cost method of improving oxygen exchange and performance in these materials at lower temperatures. LSCF cathodes on Nickel-Yttria Stabilized Zirconia (Ni-YSZ) anode supported cells were infiltrated with strontium-doped lanthanum zirconate (LSZ) pyrochlores using two methods. An aqueous solution of nitrate salts was vacuum infiltrated into the cathodes of anode supported button cells, and the cells were heated to form the pyrochlore phase in-situ. This was compared to the efficacy of infiltrating a suspension of pyrochlore nanoparticles. Different dispersants were used to prepare the nanoparticle suspensions at varying concentrations and pH levels, and the results are compared.

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Gunda, Naga Siva Kumar, and Sushanta K. Mitra. "Quantification of Microstructural and Transport Properties of Solid Oxide Fuel Cells From Three-Dimensional Physically Realistic Network Structures." In ASME 2011 9th International Conference on Fuel Cell Science, Engineering and Technology collocated with ASME 2011 5th International Conference on Energy Sustainability. ASMEDC, 2011. http://dx.doi.org/10.1115/fuelcell2011-54929.

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The present work investigated a new method of calculating effective transport properties of solid oxide fuel cell (SOFC) electrodes from three-dimensional (3D) physically realistic network structures. These physically realistic network structures are topological equivalent representations of reconstructed microstructures in the form of spheres (nodes or bodies) and cylinders (segments or throats). Maximal ball algorithm is used to extract these physically realistic network structures from the series of two-dimensional (2D) cross-sectional images of SOFC electrodes. Dual-beam focused ion beam - scanning electron microscopy (FIB-SEM) is performed on SOFC electrodes to acquire series of 2D cross-sectional images. Finite element method is implemented to compute the effective transport properties from the network structures. As an example, we applied this method to calculate the effective gas diffusivity of lanthanum strontium manganite (LSM) of SOFC. The results obtained from physically realistic network structures are compared with reconstructed 3D microstructures.

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Kim-Lohsoontorn, P., H. B. Yim, and J. M. Bae. "Electrochemical Performance of Ni-YSZ, Ni/Ru-GDC, LSM-YSZ, LSCF and LSF Electrodes for Solid Oxide Electrolysis Cells." In ASME 2010 8th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2010. http://dx.doi.org/10.1115/fuelcell2010-33017.

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The electrochemical performance of solid oxide electrolysis cells (SOECs) having nickel – yttria stabilized zirconia (Ni-YSZ) hydrogen electrode and a composite lanthanum strontium manganite – YSZ (La0.8Sr0.2MnO3−δ – YSZ) oxygen electrodes has been studied over a range of operating conditions temperature (700 to 900°C). Increasing temperature significantly increased electrochemical performance and hydrogen generation efficiency. Durability studies of the cell in electrolysis mode were made over 200 h periods (0.1 A/cm2, 800°C, and H2O/H2 = 70/30). The cell significantly degraded over the time (2.5 mV/h). Overpotentials of various SOEC electrodes were evaluated. Ni-YSZ as a hydrogen electrode exhibited higher activity in SOFC mode than SOEC mode while Ni/Ru-GDC presented symmetrical behavior between fuel cell and electrolysis mode and gave lower losses when compared to the Ni-YSZ electrode. All the oxygen electrodes gave higher activity for the cathodic reaction than the anodic reaction. Among the oxygen electrodes in this study, LSM-YSZ exhibited nearest to symmetrical behavior between cathodic and anodic reaction. Durability studies of the electrodes in electrolysis mode were made over 20–70 h periods. Performance degradations of the oxygen electrodes were observed (3.4, 12.6 and 17.6 mV/h for LSM-YSZ, LSCF and LSF, respectively). The Ni-YSZ hydrogen electrode exhibited rather stable performance while the performance of Ni/Ru-GDC decreased (3.4 mV/h) over the time. This was likely a result of the reduction of ceria component at high operating voltage.

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Song, Jung-Hoon, Nigel M. Sammes, and Xiaoyu Zhang. "Fabrication of Anode-Supported Micro-Tubular Solid Oxide Fuel Cell Using an Extrusion and Vacuum Infiltration Technique." In ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/fuelcell2008-65264.

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A simple and mass productive extrusion technique was applied to fabricate anode-supported micro-tubular solid oxide fuel cells (SOFCs). A standard NiO/8YSZ (Nickel oxide/8 mol % yttria stabilized zirconia) cermets anode, 8 YSZ electrolyte, and LSM (Lanthanum strontium manganite) cathode were used as the materials components. SEM (secondary electron microscopy) images indicated vacuum infiltration method successfully generated the thin electrolyte layer (10∼15 μm) with a structurally effective three phase boundaries. Fabricated unit cell showed the open circuit voltage of 1.12 V without any fuel leaking problems. Electrochemical tests showed a maximum power density up to 0.30 W/cm2 at 800 °C, implying the excellent performance as micro-tubular SOFCs. This study verified that the extrusion aided by vacuum infiltration process could be a promising technique for mass production of microtubualr SOFCs.

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