Relevant bibliographies by topics / Oxyde de lanthane strontium manganèse (LSMO)

Academic literature on the topic 'Oxyde de lanthane strontium manganèse (LSMO)'

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Published: 25 May 2024

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Journal articles on the topic "Oxyde de lanthane strontium manganèse (LSMO)"

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McNally, Frank, Jin Hyeok Kim, and F. F. Lange. "Fatigue Properties of Lanthanum Strontium Manganate–lead Zirconate Titanate Epitaxial Thin Film Heterostructures Produced by a Chemical Solution Deposition Method." Journal of Materials Research 15, no. 7 (July 2000): 1546–50. http://dx.doi.org/10.1557/jmr.2000.0221.

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A liquid-precursor process was used to produce an epitaxial all-oxide ferroelectric memory device structure. The lanthanum strontium manganate–lead zirconate titanate–lanthanum strontium manganate (LSMO–PZT–LSMO) structure used for this device shows excellent polarization and fatigue behavior with a remnant polarization Pr of 42 µC/cm2 and a coercive field Ec of 68 keV. The polarization was found to only slightly degrade after over 1010 fatigue cycles. This behavior is contrasted with epitaxial PZT using a metal top electrode. In addition, the use of a top LSMO electrode was a sufficient barrier to Pb loss during heating to allow subsequent (or prolonged) heat treatments that would generally lead to Pb loss.
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Kulkarni, Vaishnavi M., Dhananjay Bodas, and Kishore M. Paknikar. "Lanthanum strontium manganese oxide (LSMO) nanoparticles: a versatile platform for anticancer therapy." RSC Advances 5, no. 74 (2015): 60254–63. http://dx.doi.org/10.1039/c5ra02731d.

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BEHERA, Swayam Aryam, Ali AMANAT, and P. Ganga Raju ACHARY. "Photocatalytic degradation of ciprofloxacin drug utilizing novel PVDF/polyaniline/ lanthanum strontium manganate@Ag composites." Journal of Metals, Materials and Minerals 34, no. 1 (December 19, 2023): 1896. http://dx.doi.org/10.55713/jmmm.v34i1.1896.

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Poly (vinylidene fluoride) (PVDF) is the first-choice ferroelectric support or membrane material. The lanthanum strontium manganite (LSMO) is a well-known electrode material in the class of the solid oxide fuel cell (SOFC) materials. A set of four polymer composites PVDF-LSMO-PANI(5.0 wt%) with different amount of silver doping were fabricated with the silver nitrate and reducing agent. The characterization of these four novel PVDF based composites were characterized by the XRD, FTIR, SEM, UV-Visible DRS. The present communication highlights: (I) the effect of PANI in the PVDF-LSMO-PANI (PLP) composites towards the photocatalytic degradation of ciprofloxacin drug. (II) the effect of Ag doping in the Ag-PVDF-LSMO-PANI (Ag-PLP) composites towards the photocatalytic degradation of ciprofloxacin drug. It is observed that the incorporation of PANI in PVDF-LSMO and Ag in PVDF-LSMO-PANI polymer ceramic composites showed enhanced photocatalytic degradation of ciprofloxacin in the irradiation of visible radiation. The plausible separation of photo-generated e- hole pairs (e- and h+) carried on by charge migration kind of mechanism is being studied here to understand the improved photocatalytic activity of Ag-PVDF-LSMO-PANI composites.
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Zurauskiene, Nerija, Voitech Stankevic, Skirmantas Kersulis, Milita Vagner, Valentina Plausinaitiene, Jorunas Dobilas, Remigijus Vasiliauskas, et al. "Enhancement of Room-Temperature Low-Field Magnetoresistance in Nanostructured Lanthanum Manganite Films for Magnetic Sensor Applications." Sensors 22, no. 11 (May 25, 2022): 4004. http://dx.doi.org/10.3390/s22114004.

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The results of colossal magnetoresistance (CMR) properties of La1-xSrxMnyO3 (LSMO) films grown by the pulsed injection MOCVD technique onto an Al2O3 substrate are presented. The grown films with different Sr (0.05 ≤ x ≤ 0.3) and Mn excess (y > 1) concentrations were nanostructured with vertically aligned column-shaped crystallites spread perpendicular to the film plane. It was found that microstructure, resistivity, and magnetoresistive properties of the films strongly depend on the strontium and manganese concentration. All films (including low Sr content) exhibit a metal–insulator transition typical for manganites at a certain temperature, Tm. The Tm vs. Sr content dependence for films with a constant Mn amount has maxima that shift to lower Sr values with the increase in Mn excess in the films. Moreover, the higher the Mn excess concentration in the films, the higher the Tm value obtained. The highest Tm values (270 K) were observed for nanostructured LSMO films with x = 0.17–0.18 and y = 1.15, while the highest low-field magnetoresistance (0.8% at 50 mT) at room temperature (290 K) was achieved for x = 0.3 and y = 1.15. The obtained low-field MR values were relatively high in comparison to those published in the literature results for lanthanum manganite films prepared without additional insulating oxide phases. It can be caused by high Curie temperature (383 K), high saturation magnetization at room temperature (870 emu/cm3), and relatively thin grain boundaries. The obtained results allow to fabricate CMR sensors for low magnetic field measurement at room temperature.
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Kulkarni, Vaishnavi M., Dhananjay Bodas, and Kishore M. Paknikar. "ChemInform Abstract: Lanthanum Strontium Manganese Oxide (LSMO) Nanoparticles: A Versatile Platform for Anticancer Therapy." ChemInform 46, no. 36 (August 20, 2015): no. http://dx.doi.org/10.1002/chin.201536302.

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CESÁRIO, Moisés Rômolos, Daniel Araújo MACEDO, Bráulio Silva BARROS, Patrícia Mendonça PIMENTEL, Marcus Antonio de Feitas MELO, and Dulce Maria de Araújo MELO. "SYNTHESIS AND CHARACTERIZATION OF LSM/SDC FILMS AS COMPOSITE CATHODES FOR SOLID OXIDE FUEL CELLS." Periódico Tchê Química 07, no. 14 (August 20, 2010): 16–22. http://dx.doi.org/10.52571/ptq.v7.n14.2010.17_periodico14r_pgs_16_22.pdf.

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The study of the strontium-doped lanthanum manganites in the form of films covers a large area of technological applications, such as ceramics semiconductors and solid oxide fuel cell cathode. Strontium-doped lanthanum manganite and samarium-doped ceria has been used as composite cathode of solid oxide fuel cells (SOFCs) because of its excellent performance in electronic and ionic conductivity. In this work, we produced films of the cathode LSM / SDC on yttria stabilized zirconia (YSZ) electrolytes. La0.8Sr0.2MnO3 (LSM) and Ce0.8Sm0.2O1.9 (SDC) powders were synthesized by a synthesis route similar to the Pechini method, in which the gelatin replaced the ethylene glycol as polymerizing agent. Precursor powders of LSM and SDC phases were calcined at 900 ºC. In the step of films production were prepared suspensions of the LSM and SDC powders with addition of ethyl cellulose as a pore-forming agent. The ceramic suspensions were deposited on YSZ electrolyte using the spin coating method. After sintering to 1150 °C for 4 h the films were characterized by XRD and SEM. The film with 10 wt.% ethyl cellulose presented porous and strongly adhered to the YSZ substrate.
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Gao, Min, Cheng Xin Li, Ming De Wang, Hua Lei Wang, and Chang Jiu Li. "Influence of the Surface Roughness of Plasma-Sprayed YSZ on LSM Cathode Polarization in Solid Oxide Fuel Cells." Key Engineering Materials 373-374 (March 2008): 641–44. http://dx.doi.org/10.4028/www.scientific.net/kem.373-374.641.

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Under SOFCs operating condition, the cathode reaction rate is determined by triple phase boundary (TPB) areas which are associated with the geometry of the interface between the cathode and the electrolyte. In this paper, YSZ electrolyte was deposited by atmospheric plasma spraying (APS). A nano-scaled lanthanum strontium manganate (LSM) cathode was prepared by sol-gel process on APS YSZ with different surface roughness to aim at increasing the TPB. The polarization curves of LSM cathode were characterized by potentiostat. The influence of the roughness of APS YSZ on the polarization of LSM cathode was investigated. It was found that the overpotential of the LSM cathode is significantly reduced with the increase of YSZ surface roughness.
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Tarragó, Diego Pereira, Célia de Fraga Malfatti, and Vânia Caldas de Sousa. "Combustion Synthesis of LSM Powders from a Precursor Solution with Mixed Fuels." Materials Science Forum 727-728 (August 2012): 1329–33. http://dx.doi.org/10.4028/www.scientific.net/msf.727-728.1329.

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For the combustion synthesis of strontium doped lanthanum manganite (LSM), different fuels can be used influencing the phase formation and also the powder morphology. Both are important features that can improve the material performance when used in a solid oxide fuel cell cathode. Urea and sucrose are fuels used to synthesize distinct LSM powders, thus the purpose of this work was to mix these fuels in order to obtain nanocrystalline LSM powders with a differentiated morphology, more convenient for the desired application. After calcination at 750°C for 3 hours the powder generated a pure phase LSM X-ray diffraction pattern and the micrographs taken in the transmission and scanning electron microscopes revealed a very peculiar morphology with specific surface area (BET) of 13 m²/g. Calcination led to a single phase and more crystalline material but showed no influence in the powder morphology.
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Rabo, Jennet R., and Rinlee Butch M. Cervera. "Fabrication of Solid Oxide Electrolysis Single Cell Using NiO-YSZ/YSZ/LSM-YSZ via Drop-Coating Method." Key Engineering Materials 847 (June 2020): 129–34. http://dx.doi.org/10.4028/www.scientific.net/kem.847.129.

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Solid oxide electrolysis cell (SOEC) is a highly efficient and environmentally friendly technology for future hydrogen generation. In this study, electrolyte-supported SOEC single cell was fabricated via a simple and facile drop-coating technique. Thin film electrodes of nickel oxide/yttria stabilized zirconia (NiO-YSZ) cathode and strontium-doped lanthanum manganite/ytrria-stabilized zirconia (LSM-YSZ) anode were deposited onto yttria-stabilized zirconia (YSZ) solid electrolyte substrate. Scanning electron microscopy (SEM) with energy dispersive analysis (EDS) was used to study the microstructural properties of the heat-treated samples and revealed a successful thin film deposition of porous electrodes onto the dense YSZ substrate. XRD patterns showed the desired crystal structure of the deposited electrode thin films. Distinct phases of cubic YSZ and monoclinic LSM were observed for the LSM-YSZ anode while cubic NiO and YSZ phases were observed for the deposited cathode. Electrochemical conductivity of the cell was investigated using electrochemical impedance spectroscopy analysis (EIS) which revealed a total conductivity of about 2.0 mS/cm at 700 °C.
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Gómez, Laura, J. Escobar, Maria Teresa Colomer, and Rodrigo Moreno. "Manufacture of YSZ-LSM Semi-Cell by Colloidal Processing." Materials Science Forum 727-728 (August 2012): 746–51. http://dx.doi.org/10.4028/www.scientific.net/msf.727-728.746.

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Yttria stabilized zirconia (YSZ) is the most common electrolyte in solid oxide fuel cells (SOFC). The planar configuration is widely used for designing single cells, in which a thick cathode layer can be used as the supporting electrolyte film. The manufacture of the semi-cell formed by anode and electrolyte has been widely studied and there are many works dealing with its colloidal processing. However, the semi-cell formed by cathode and electrolyte has received much lower attention. This work deals with the manufacture of a semi-cell consisting of YSZ as electrolyte and strontium-doped lanthanum manganite (LSM) as a cathode through a colloidal processing route. The colloidal behavior of diluted suspensions of YSZ and the rheology of their concentrated suspensions were studied as a function of deflocculant content, mixing time by using ultrasounds probe and ageing time. The colloidal stability of aqueous suspensions of LSM was studied by measuring the zeta potential as a function of pH and deflocculant content. These concentrated suspensions were used to obtain thick self-sustained substrates by casting methods. The YSZ electrolyte and LSM cathode were prepared by tape casting in water medium.
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Dissertations / Theses on the topic "Oxyde de lanthane strontium manganèse (LSMO)"

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Gong, Minhui. "Etude des électrodes sur batterie zinc-air." Electronic Thesis or Diss., Université Paris sciences et lettres, 2021. http://www.theses.fr/2021UPSLC024.

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La batterie zinc-air devient une alternative potentielle à la batterie lithium-ion en raison de son avantage en termes de ressources, de sa densité d'énergie théorique élevée et de son faible potentiel de risque pour la sécurité. Ce travail met l'accent sur les problèmes conventionnels impliquant à la fois l'électrode à zinc et à air, visant à l'application.Pour l'électrode de zinc, deux configurations maison sont utilisées pour étudier la croissance des dendrites de zinc et l'évolution de l'hydrogène pendant le dépôt avec un électrolyte statique et en flux, respectivement. On trouve qu'une concentration élevée de zincate dans un électrolyte avec 7 M KOH (> 0,4 M ZnO) et la présence de circulation de l’électrolyte sont préférables pour réduire la croissance des dendrites. Cependant l'électrolyte en circulation générerait plus de dégagement d'hydrogène. Pour l'électrode à air, une étude de voltampèremètre cyclique détaillée de l'activité catalytique de pérovskites de lanthane- manganèse dopés au strontium (LSMO) vis-à-vis de la réaction de réduction de l'oxygène est menée. Une nouvelle méthodologie est proposée pour la comparaison de l'activité catalytique des LSMO. L'assemblage de la batterie zinc-air est également testé en formulant les électrodes avec un polymère PVDF-HFP prometteur dans les applications d’électrode à air
Zinc-air battery is becoming a potential alternative for lithium-ion battery owing to its resource stock advantage, high theoretical energy density, and low potential of safety risk. This work emphasizes the conventional issues involving both zinc and air electrode, aiming to application.For the zinc electrode, two homemade setups are used to study the zinc dendrite growth and hydrogen evolution during deposition with static and flowing electrolyte, respectively. It is found that high zincate concentration in electrolyte with 7 M KOH (>0.4 M ZnO) and flowing electrolyte are preferable for depressing dendrite growth. While flowing electrolyte would generate more hydrogen evolution. For the air electrode, a detailed cyclic voltametric investigation of the catalytic activity of lanthanum strontium manganese oxides (LSMO) towards oxygen reduction reaction is conducted. A new current normalization method is proposed for comparison of catalytic activity of the LSMOs. Zinc-air battery assembly is also tested, while remaining to be improved. Nevertheless, cost-effective PVDF-HFP is found to be a promising binder for air electrode formulation
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Esteve, David. "Développement d'une technique de caractérisation optique appliquée au suivi in situ de la croissance d'oxydes fonctionnels par ablation laser pulsé." Paris 11, 2010. http://www.theses.fr/2010PA112385.

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Une instrumentation optique entièrement statique permettant le suivi in situ de la croissance d'oxydes fonctionnels par ablation laser pulsé, est présenté. Au travers de l'étude de deux système modèles, que sont la croissance de films minces de La₀. ₆₇Sr₀. ₃₃LMnO₃ sur des pseudo-substrats de SrTiO₃/Si et de couches minces de SrRuO₃ déposées sur des substrats de SrTiO₃ vicinaux, le dispositif proposé permet d'obtenir une précision de mesure sur les épaisseurs de l'ordre de la maille atomique (4Å), d'extraire les paramètres physiques de diffusion des espèces en surface (énergie d'activation de diffusion), mais aussi d'observer et d'identifier les modes de croissance. Ces résultats sont en parfait accord avec la simulation numérique développée, reposant sur des modèles de traitement de réflectivité de systèmes multi couches combiné avec la théorie des milieux effectifs
A fully static set up allowing in situ observation of the growth of functionnal oxides grown by pulsed laser deposition, is presented. Through the study of two model systems, those are the growth of thin films of La₀. ₆₇Sr₀. ₃₃LMnO₃ on pseudo-substrate of SrTiO₃/Si and thin layers of SrRuO₃ grown on vicinal substrate of SrTiO₃, the proposed instrumentation permit to achieve a precision about one unit cell (4Å) on thickness measurments, to extract physical parameters of the diffusion of species on the surface (activation energy of diffusion), but also observing and identifying growth modes. These results are in good agreement with the numerical simulation developped, based on the treatment of the reflectivity of multi-layers systems combined with effective medium theory
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Cooper, Celeste Eaton. "Degradation in Performance of Lanthanum Strontium Manganite Based Solid Oxide Fuel Cell Cathodes Under Accelerated Testing." Case Western Reserve University School of Graduate Studies / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=case1485524881843845.

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Book chapters on the topic "Oxyde de lanthane strontium manganèse (LSMO)"

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Borrell, Amparo, Rut Benavente, René M. Guillén, María D. Salvador, Vaclav Pouchly, Martina Ilcikova, Richard Krumpolec, and Rodrigo Moreno. "Study of SPS sintering of strontium-doped lanthanum manganite (LSM) by surface modification of powders using DCSBD and ALD." In Ceramic Materials - Present and Future [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.1002035.

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Throughout the ceramic processing cycle, it is well known that a small change in the surface energy of as-received powders can cause a considerable effect on the final properties of consolidated materials. The main objective of this chapter is to describe the design and manufacture of new ceramic materials based on strontium-doped lanthanum manganites, LSM (La0.8Sr0.2MnO3) and LSM-8YTZP composites, for cathode in solid oxide fuel cells (SOFC) applications due to their excellent properties, by modifying the surface energy of the starting powder using techniques, such as Diffuse Coplanar Surface Barrier Discharge (DCSBD) and atomic layer deposition (ALD). Subsequently, in order to evaluate the activation energy and optimise the sintering behaviour of these powders, the Spark Plasma Sintering (SPS) technique will be used. SPS allows the complete densification of pieces by a fast and low energy consumption processing.
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Conference papers on the topic "Oxyde de lanthane strontium manganèse (LSMO)"

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Harris, William M., George J. Nelson, Jeffrey J. Lombardo, Alex P. Cocco, John R. Izzo, Wilson K. S. Chiu, Pietro Tanasini, et al. "Analysis of Solid Oxide Fuel Cell LSM-YSZ Composite Cathodes With Varying Starting Powder Sizes." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-64237.

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Solid oxide fuel cell cathodes have been examined using non-destructive x-ray nanotomography. The cathodes examined were a composite of strontium-doped lanthanum manganite (LSM) and yttria-stabilized zirconia (YSZ), with three different starting powder sizes of 0.3 μm, 0.5 μm, and 1 μm. Differential absorption contrast imaging was performed over the manganese K-edge (6539 eV) for the identification of the LSM, YSZ, and pore phases. The three phases were each segmented from reconstruction of the tomography data. Three dimensional volumes of the segmented phases were used to calculate structural characterization parameters of the sample including porosity, pore size distributions, and mean phase sizes. These parameters are reported and some correlations are drawn to the starting powder size.
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Brüning, B., B. Gries, H. Nakadate, and S. Zimmermann. "New Thermal Spray Powders for SOFC Components." In ITSC2011, edited by B. R. Marple, A. Agarwal, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima, and A. McDonald. DVS Media GmbH, 2011. http://dx.doi.org/10.31399/asm.cp.itsc2011p0127.

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Abstract In Solid Oxide Fuel Cells (SOFC), thermal spraying has become a preferred process in order to create functional and protective coatings. After a long period of research, SOFC is on the way to become a fully developed technology starting into mass production. Cost aspects of coating generation are becoming decisive. For this reason, thermal spraying has become the preferred process to apply e.g. Manganese Cobalt Iron Oxide (MCF) coatings which prevent the formation of volatile Cr oxides in the SOFC air supply and off-gas. Also Lanthanum Strontium Manganese Oxide (LSM) is now preferentially applied via thermal spraying. The presentation highlights the properties of commercially available spray powders for SOFC, their processing via different spray processes, and the properties of coatings achieved.
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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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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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Zhang, C., W. Y. Li, H. Liao, C. Coddet, C. J. Li, and C. X. Li. "Microstructure and Electrical Conductivity of Atmospheric Plasma Sprayed LSM-YSZ Composite Cathode Coating." In ITSC2007, edited by B. R. Marple, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima, and G. Montavon. ASM International, 2007. http://dx.doi.org/10.31399/asm.cp.itsc2007p1064.

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Abstract Yttria stabilized zirconia and lanthanum strontium manganate (YSZ/LSM) have been employed to fabricate the composite cathode functional layer for solid oxide fuel cells (SOFCs). In the present study, the YSZ/LSM composite coating was deposited by atmospheric plasma spray (APS). The electrical conductivity of the composite coating was measured by the means of Direct Current (DC) measurement in a temperature range of 500-900 °C. The electrical conductivity of YSZ- 50%LSM coating changed from 2.17 S/cm to 3.60 S/cm along the direction parallel to the coating surface at the temperature range. For the same specimen, the electrical conductivity in the perpendicular direction is less than one-tenth of that in the parallel direction. The anisotropy of the electrical conductivity is attributed to the phases of different properties in the composite coating and the APS coating structure characteristics. The activation energy of the composite coating at both directions was calculated. The results showed that the electrical conduction of the composite was strongly influenced by the YSZ content.
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Martins, R. F., M. C. Brant, R. Z. Domingues, and T. Matencio. "NiO/YSZ Composites for SOFC: Synthesis and Characterization." In ASME 2006 4th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2006. http://dx.doi.org/10.1115/fuelcell2006-97146.

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Solid oxide fuel cell (SOFC) works at high temperature and is normally used in stationary devices which are of wide interest in the world market. The most currently SOFC developers utilize yttria-stabilized zirconia (YSZ) as electrolyte, strontium-doped lanthanum manganite (LSM) as cathode and a Ni/YSZ cermet obtained from NiO/YSZ in situ reduction as anode. The electrode performance is directly influenced by powder grain sizes, homogeneity, purity, and amount of Ni. Although physical mixture is a simpler procedure it hardly gives homogeneous materials as suitable to SOFC applications. Alternative chemical methods are sol-gel, impregnation and those derived from Pechini route. The present work compares thermal stability and hydrogen reducibility of NiO/YSZ composites prepared by impregnation (I), Pechini (P) and physical mixture (PM) procedures.
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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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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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Marchand, O., R. Rampon, and G. Bertrand. "Anode SOFCs Produced by Suspension Plasma Spraying: Interests and Prospects." In ITSC2008, edited by B. R. Marple, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima, and G. Montavon. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 2008. http://dx.doi.org/10.31399/asm.cp.itsc2008p1097.

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Abstract:
Abstract In order to achieve Solid Oxide Fuel Cells (SOFC) with reduced costs, the atmospheric plasma spray process (APS) could be an attractive technique. However, it is difficult to produce plasma sprayed coatings with the appropriate porosity for the electrodes and full density for the electrolyte. The spray process has been adapted by providing a suspension or a powder as feedstock material combined with optimized spray conditions to manufacture SOFC layers with required compositions, microstructures and properties. Suspensions or powders were injected in a plasma jet originating from a conventional torch (F4) implementing external devices. By using optimized suspensions of nickel oxide (NiO) and yttria stabilized zirconia (YSZ) in ethanol, porous anodes have been produced with thicknesses around 50 µm. By the same way aqueous suspensions of yttria stabilized zirconia (YSZ) powders have been prepared to achieve a fine layer as electrolyte to produce the first half cells and the porous cathode layers based on lanthanum strontium manganite (La0.8Sr0.2MnO3 or LSM) have been manufactured by conventional atmospheric plasma spraying of powders.
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10

Sukeshini, A. M., T. Jenkins, P. Gardner, R. M. Miller, and T. L. Reitz. "Investigation of Aerosol Jet Deposition Parameters for Printing SOFC Layers." In ASME 2010 8th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2010. http://dx.doi.org/10.1115/fuelcell2010-33262.

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Abstract:
This work entails an investigation of the Aerosol Jet® Printing (AJP) method for depositing dense and porous layers necessary for the fabrication of solid oxide fuel cells (SOFCs). Ink preparation, method of printing, and the impact of various printing and processing parameters on the microstructure of layers will be presented. In addition, the electrochemical performance of anode supported button cells produced via the AJP process will be discussed. Thin electrolyte and cathode layers were deposited onto a standard anode-supported substrate and consisted of a yttria stabilized zirconia (YSZ) electrolyte, a strontium doped lanthanum manganate (LSM)/YSZ cathode functional interlayer, and a neat LSM cathode current collection layer. Optimal printing parameters for depositing dense electrolyte layers with thickness ranging from a few microns to a few tens of microns (8–33 μm) were identified. Porous composite cathode interlayers were printed from mixtures of individually aerosolized components of YSZ and LSM. Button cells incorporating the electrolyte and cathode layers on a NiO/YSZ support substrate exhibited stable voltage of 1.16–1.20 V at open circuit at 700–850 °C for hydrogen and air as fuel and oxidant, respectively. The results demonstrate the capability and potential of AJP method for deposition of layers necessary for SOFC fabrication and suggest that the method is very viable for obtaining highly reproducible microstructures with potential for mass manufacturing.
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