Atmospheric Plasma-Sprayed Metal-Supported Solid Oxide Fuel Cells with Varying Cathode Microstructures

Harris, Jeffrey; Kuhn, Joel; Kesler, Olivera

doi:10.1149/2.1591704jes

Cited by 5 publications

(2 citation statements)

References 27 publications

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“…Early work 33,41,42 indicated high surface roughness, and cracks in the surface, leading to poor cell performances in the 650-750 C (OCVs from 0.9 to 1 V), on YSZ electrolyte cells with SS430L ferritic steel porous supports (2009-2011). There has been tremendous evolution in optimization of PS techniques, reported by the same author, 21,34,[47][48][49]51 culminating in some very high performances mentioned earlier in the technology development section, and in Table 11.…”

Section: Review Of Advanced Manufacturing and Cell-stack Integrationmentioning

confidence: 97%

Recent developments in metal‐supported solid oxide fuel cells

Krishnan

2017

WIREs Energy & Environment

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Metal‐supported solid oxide fuel cells (MSCs) offer certain strategic advantages over the more conventional solid oxide fuel cells (SOFCs), which comprise only ceramic materials. Since alloys such as ferritic steels are very similar in their coefficient of thermal expansion (CTE) with ceramic components, viz., cerias, zirconias, and nickel oxide doped with either of them, they could provide excellent thermal cyclability while maintaining a strong interlayer bond. Therefore, in an anode‐supported cell the entire NiO‐ceramic support can be replaced by a ferritic steel porous support—the catalytically active NiO is therefore, a functional layer only. A huge savings in materials cost is achievable, because cerias and zirconias [usually doped with Y, Gd, Sm rare earth (RE) elements] are considerably more expensive that ferritic steels. Lowering the capital costs for SOFCs is an extensive global undertaking with US Department of Energy (DOE) laying down targets such as ~$ 200/kW for the stack itself, in order for SOFCs to become competitive with grid power costs and to offer a power source that promises 24 × 7 power supply for critical applications. This will eventually lead to a premier electricity generation device in the distributed power space, with the highest known electrical efficiencies (>50%). MSCs need very robust, high precision, and cost‐effective manufacturing techniques, which are scalable to high volumes. One of the main goals in this review is to showcase some of the work done in this area since the last review (2010), and to assess the technology challenges, and new solutions that have emerged over the past few years. WIREs Energy Environ 2017, 6:e246. doi: 10.1002/wene.246 This article is categorized under: Fuel Cells and Hydrogen > Science and Materials

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Section: Review Of Advanced Manufacturing and Cell-stack Integrationmentioning

confidence: 97%

Recent developments in metal‐supported solid oxide fuel cells

Krishnan

2017

WIREs Energy & Environment

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“…Además, se han empleado varias técnicas diferentes para fabricar SOFC planares [89][90][91]. Pero las más comunes son tape casting [92], dry pressing [93] y screen printing [94].…”

Section: Tipo De Diseños De Sofcunclassified

Construcción de una Celda de Combustible de Óxido Sólido para la Producción de Electricidad, Mediante el Uso y Optimización de la Perovskita La1-xSrx MnO3 (x = 0.2, 0.4) como Material Constituyente del Electrodo de Oxígeno.

Guillermo

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La perovskita La1-xSrxMnO3 (x = 0.2, 0.4) (LSM) como material de electrodo de oxígeno para las celdas de combustible de óxido sólido (SOFC) se sintetizó por el método de combustión rápida en solución y se evaluaron sus características estructurales, morfológicas, mecánicas, eléctricas y ópticas mediante las herramientas de caracterización correspondientes. Los resultados de DRX mostraron la coexistencia de los polimorfos romboédricos R-3c y Pm-3m para la fase perovskita, corroboradas por imágenes HR-TEM, mostrando que el método de combustión rápida no permitió la formación pura de la fase La1-xSrxMnO3 (x = 0.2, 0.4) para las temperaturas de calcinación inferiores a 1400 y 1500°C respectivamente, debido a la rapidez de la síntesis de combustión 500°C durante 5 min. Se observó que el tamaño medio de los granos aumentaba con el tiempo de calcinación. El análisis EDS mostró una mejor concordancia de la estequiometría con la composición teórica. La porosidad aparente disminuyó con el aumento de la temperatura y el tiempo de calcinación debido a la coalescencia de los poros de sinterización. La dureza mejoró con el aumento del tiempo y la temperatura de calcinación y alcanzó un valor máximo de 5.7 GPa que coincidía simplemente con la densidad aparente. Se observó una tendencia similar en los estudios de resistividad en función de la temperatura y todas las muestras presentaron una resistividad baja de ~1.2 Ω-cm en el rango de temperaturas de 600-700°C. Para la muestra La0.6Sr0.4MnO3 la brecha de banda calculados oscilan entre 3.71 y 3.95 eV, lo que demuestra que el compuesto también puede ser un candidato adecuado para el desarrollo de dispositivos optoelectrónicos de alta frecuencia. A partir de estos fue construido una SOFC con diseño planar soportado sobre electrolito mediante la técnica de Screen Printing, tomando como electrolito el LSGM (La0.8Sr0.2Ga0.8Mg0.2O3) y electrodo de combustible LSCM (La0.75Sr0.25Cr0.5Mn0.5O3). La celda fue evaluada a 600 y 700 °C con 100 ml.min-1 de H2. La curva IV indicaba que el OCV aumentaba ligeramente al aumentar la temperatura, mientras que en circuito cerrado se obtenía una mayor potencia a temperaturas más elevadas. La potencia máxima alcanzada fue de 4.3 mW.cm-2 a 700°C, que correspondía al intervalo más bajo señalado en la bibliografía para este tipo de celdas de combustible. Los posibles factores que afectan al rendimiento son las perdidas por polarización debido al grosor de las capas de electrodos depositadas y la existencia de micro fisuras en el electrodo de combustible LSCM.

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Fabrication and performance of atmospheric plasma sprayed solid oxide fuel cells with liquid antimony anodes

Jiang

Cao

et al. 2021

Int J Coal Sci Technol

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A solid oxide fuel cell (SOFC) with a liquid antimony anode (LAA) is a potential energy conversion technology for the use of impurity-containing fuels. Atmospheric plasma spraying (APS) technology has become a promising LAA-SOFC preparation method because of its economy and convenience. In this paper, button SOFCs with different cathode materials and ratios of pore former were prepared by the APS method and were operated at 750 °C. The effect of the cathode structure on the electrochemical performance of the LAA-SOFCs was analyzed, and an optimized spraying method for LAA-SOFCs was developed. A tubular LAA-SOFC was prepared using the APS method based on the optimized spraying method, and a peak power of 2.5 W was reached. The tubular cell was also measured at a constant current of 2 A for 20 h and was fed with a sulfur-containing fuel to demonstrate its impurity resistance and electrode stability.

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Atmospheric Plasma-Sprayed Metal-Supported Solid Oxide Fuel Cells with Varying Cathode Microstructures

Cited by 5 publications

References 27 publications

Recent developments in metal‐supported solid oxide fuel cells

Recent developments in metal‐supported solid oxide fuel cells

Construcción de una Celda de Combustible de Óxido Sólido para la Producción de Electricidad, Mediante el Uso y Optimización de la Perovskita La1-xSrx MnO3 (x = 0.2, 0.4) como Material Constituyente del Electrodo de Oxígeno.

Fabrication and performance of atmospheric plasma sprayed solid oxide fuel cells with liquid antimony anodes

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