Fabrication and structural properties of porous Cu–YSZ cermets for solid oxide fuel cells

Kim, C.M.; Kim, J.; Park, K.

doi:10.1016/j.powtec.2014.01.007

Cited by 8 publications

(3 citation statements)

References 22 publications

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“…Copper does not present the inconvenience of carbon deposition, it is reasonably tolerant to the presence of sulfur and is cheaper than nickel. Copper-based composites 20,21 . However, a major limitation for those applications is to find suitable processing routes capable to produce homogeneous mixtures of metal powders with small amounts of ceramic particles.…”

Section: Introductionmentioning

confidence: 99%

Processing of Copper Based Foil Hardened with Zirconia by Non-Deformation Method

et al. 2017

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Flat sintered copper and copper-zirconia substrates, with zirconia nanoparticles contents of 1 and 3 vol%, were produced by aqueous tape casting and controlled sintering. Aqueous suspensions were prepared to a solid content of 58 vol% using 3 wt% commercial binder emulsion. The green tapes were treated at 350 ºC in air to remove organics and sintered at temperatures ranging from 800 to 1000 ºC in atmosphere of Ar/5%H 2 . Copper tapes reached almost full densification at 900 ºC. Composite with 1 vol% zirconia, sintered at 800 ºC, maintained high density and provided a noticeable increase of the mechanical strength, whereas further additions up to 3 vol% reduced the densification and the resulting mechanical performance became poorer.

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Section: Introductionmentioning

confidence: 99%

Processing of Copper Based Foil Hardened with Zirconia by Non-Deformation Method

et al. 2017

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“…These kind of anodes have demonstrated effective behavior with a variety of hydrocarbon fuels, and are highly resistant to deactivation by carbon deposition, even considering the direct conversion of hydrocarbons without prior reform in CO and H 2 [9]. Cu-based anodes have the additional advantage of being reasonably tolerant to sulfur [10].…”

Section: Introductionmentioning

confidence: 99%

One-step synthesis and microstructure of CuO-SDC composites

et al. 2017

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An in situ one step synthesis route based on the polymeric precursor method was used to produce dual phase CuO-samaria doped ceria (SDC) nanocomposite powders. This chemical route allowed to obtain composite powders with reduced particle size and uniform distribution of Cu, Ce and Sm elements. The particulate material was characterized by powder X-ray diffraction (XRD) combined with Rietveld refinement. CuO-SDC sintered in air between 950 to 1050 °C and subsequently reduced to Cu-SDC cermets were further characterized by XRD and scanning electron microscopy. The open porosity was measured using the Archimedes' principle. Suitable microstructures for both charge transfer and mass transport processes (30 to 45% porosity) were attained in Cu-SDC cermets previously fired at 1000 to 1050 °C. Overall results indicated that CuO-SDC composites and Cu-SDC cermets with potential application as anodes for solid oxide fuel cells (SOFCs) can be obtained by microstructural design. An anode supported half-cell was prepared by co-pressing and co-firing gadolinia doped ceria (CGO) and the herein synthesized CuO-SDC nanocomposite powder.

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“…Debido a su baja temperatura de fusión, el óxido CuO puede reducirse a Cu con el gas del combustible durante el funcionamiento de la celda y así mejorar su funcionamiento [12,14]. Cabe resaltar que el reciente desarrollo de materiales para celdas SOFC libres de Ni, tales como NdBaCo 2/3 Fe 2/3 Cu 2/3 O 5+␦ [15] Cu-Co/CeO 2 [16], CuFe/CeO 2 [17], Cu-YSZ [18] y óxidos tipo perovskita [19]. LaCrO 3 , La(Ti,Mn)O 3 , Sr(Nb,Mn)O 3 como ánodos alternativos para celdas SOFC han despertado una gran atención.…”

Section: Introductionunclassified

Impregnación de la perovskita La0.8Sr0.2Cr0.5Mn0.5O3-δ como ánodo en celdas SOFC

Flores¹,

Cabrera²,

Valencia³

et al. 2015

Boletín de la Sociedad Española de Cerámica y Vidrio

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información del artículo Historia del artículo: Recibido el 11 de mayo de 2015 Aceptado el 20 de julio de 2015 On-line el xxx Palabras clave: Celdas de combustible de óxido sólido Sol-gel Estructura de la perovskita Impregnación r e s u m e n Se han sintetizado a través del método sol-gel, y caracterizado por varias técnicas, nuevos compósitos tipo perovskita de La 0,8 Sr 0,2 Cr 0,5 Mn 0,5 O 3-␦ (LSCM), utilizando cobre (XCu; X = 25, 35 y 45%) como aditivo formador del cermet LSCM + Cu para utilizarse como ánodos alternativos en celdas de combustible de óxido sólido de temperatura intermedia (IT-SOFC). Se confirma por difracción de rayos X (XRD) la formación de fase de los cermets LSCM-Cu. La conductividad eléctrica obtenida desde temperatura ambiente hasta 800 • C indica la presencia de 2 tipos de comportamiento tanto semiconductor como metálico. Cuando la concentración de Cu fue del 25 y del 35%, el comportamiento que dominó fue del tipo semiconductor. La determinación de los coeficientes de expansión térmica (TEC) mostró una dependencia lineal inversamente proporcional a la concentración de Cu. Nuestros resultados de conductividad eléctrica, análisis morfológico y TEC sugieren que los ánodos con 25 y 35% de Cu tienen la mayor posibilidad para aplicarse en las celdas tipo SOFC-IT. © 2015 Publicado por Elsevier España, S.L.U. en nombre de SECV. Este es un artículo Open Access bajo la licencia CC BY-NC-ND (http://creativecommons.org/licenses/by-nc-nd/4.0/). Keywords: Solid oxide fuel cells Sol-gel Perovskite structure Impregnation a b s t r a c t New types of La 0,8 Sr 0,2 Cr 0,5 Mn 0,5 O 3-␦ (LSCM) perovskite composites with the addition of copper(Cu), XCu (X = 25, 35 and 45%) as forming additive, were synthesized via the sol-gel method as alternative anodes for intermediate-temperature solid oxide fuel cells (IT-SOFCs) and characterized by several techniques. Phase formation of the LSCM-Cu cermets was confirmed by X-ray diffraction (XRD). Electrical conductivity was obtained from room temperature to 800 • C, indicating the presence of two types of behaviors: both semiconductor and metal. When the concentration of Cu was 25 and 35%, the dominant behavior was the semiconductor type. The thermal expansion coefficient (TEC) determined was linearly inversely proportional to the concentration of Cu. The results of electrical conductivity, TEC, * Autor para correspondencia.Correo electrónico: cedhryck@hotmail.com (J. Alvarado-Flores). http://dx.

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Fabrication and structural properties of porous Cu–YSZ cermets for solid oxide fuel cells

Cited by 8 publications

References 22 publications

Processing of Copper Based Foil Hardened with Zirconia by Non-Deformation Method

Processing of Copper Based Foil Hardened with Zirconia by Non-Deformation Method

One-step synthesis and microstructure of CuO-SDC composites

Impregnación de la perovskita La0.8Sr0.2Cr0.5Mn0.5O3-δ como ánodo en celdas SOFC

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