Development and testing of anode-supported solid oxide fuel cells with slurry-coated electrolyte and cathode

Muccillo, R.; Muccillo, E.N.S.; Fonseca, Fábio C.; França, Y.V.; Porfirio, T.C.; Florio, Daniel Z. de; Berton, Marcos Antonio Coelho; Garcia, Carlos Alexandre de Amorim

doi:10.1016/j.jpowsour.2005.06.021

Cited by 28 publications

(25 citation statements)

References 13 publications

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“…It is possible to compare these first results with literature data and safely state that the LSCF-SDC cathode composite is qualitatively better than other plain standard materials or cathode composites already reported. It should also be mentioned that the result obtained at 800 ºC is similar to that reported by Muccillo et al (Muccillo et al, 2006) for a SOFC single cell with LSM-YSZ cathode, Ni-YSZ anode and 70 µm thick YSZ electrolyte. Nonetheless, voltage and power density values cannot be compared to literature data because of the thick (200 µm) electrolyte used as cell support, which is responsible for high ohmic polarization.…”

Section: Characterization Of a Sofc Single Cellsupporting

confidence: 89%

Infrared Spectroscopy Techniques in the Characterization of SOFC Functional Ceramics

Macedo¹,

Cesário²,

Souza³

et al. 2012

Infrared Spectroscopy - Materials Science, Engineering and Technology

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Section: Characterization Of a Sofc Single Cellsupporting

confidence: 89%

Infrared Spectroscopy Techniques in the Characterization of SOFC Functional Ceramics

Macedo¹,

Cesário²,

Souza³

et al. 2012

Infrared Spectroscopy - Materials Science, Engineering and Technology

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“…The reagents used were cerium nitrate (Ce(NO 3 ) 3 The resulting solution was stirred continuously for complete homogenization and heated in a hotplate to 90 °C to vaporize excessive water, forming a brown gel-like solution. After that, the temperature was elevated to 300°C and the combustion reaction took place.…”

Section: Synthesismentioning

confidence: 99%

“…Solid oxide fuel cells (SOFCs) can provide high-energy conversion efficiency for a variety of applications ranging from large scale power plants to mobile applications for vehicles and portable electronics [2,3]. Yttria stabilized zirconia (YSZ), commonly used as an electrolyte material in SOFCs, requires temperatures above 800 °C for the cell operation, leading to high costs of interconnectors and other construction materials, as well as problems with thermal degradation and thermal expansion mismatch.…”

Section: Introductionmentioning

confidence: 99%

New Ionic Conductor as Solid Electrolyte for Solid Oxide Fuel Cell Application

Ferreira¹,

Berton²

2014

Proceedings of the 1st International Seminar on Industrial Innovation in Electrochemistry

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In this work, ceria-doped electrolytes with general formula of Ce 0.8 Y 0.2-x La x O 1.9 (x=0.00; 0.05; 0.10; 0.15; 0.20) were synthesized by combustion method, using glycine as a fuel. The phase identification and morphology of the powders was studied by X-ray diffraction (XRD), surface area measurements (BET) and Raman spectroscopy. The consistency of particle sizes, calculated by the Scherrer formula, and BET measurements suggests that all as-synthesized powders were composed of weakly agglomerated crystallites. After the sintering process (1450 °C/5h) all pellets reach relative densities above 94% of the theoretical density. The contributions of grains and grain boundaries to the total conductivity, were investigated by a.c. impedance spectroscopy, in temperature range of 200-500 °C. The results show that the substitution of the yttrium by lanthanum mainly affects the grain boundary conductivity.

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“…O catodo La 0,65 Sr 0,3 MnO 3 (LSM) foi preparado pelo método dos precursores poliméricos [17,18] e a camada desse foi depositada sobre o eletrólito por wet powder spraying (WPS) usando suspensões à base de etanol. Um tratamento térmico final a 1200°C completou a fabricação das células unitárias.…”

Section: Materiais E Métodosunclassified

Desenvolvimento e testes de células a combustível suportadas pelo anodo com eletrólitos depositados por spin-coating

Tabuti

Fonseca²,

Florio

2013

Matéria (Rio J.)

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RESUMONo presente estudo são apresentados os desenvolvimentos de células suportadas pelo anodo usando os materiais convencionais, à base de zircônia estabilizada com ítria (ZEI) e NiO, e técnicas químicas de síntese e de deposição de camadas dos demais componentes: camada funcional, eletrólito e catodo. Os eletrodos foram sintetizados no Instituto de Pesquisas Energéticas e Nucleares (IPEN) por técnicas químicas que garantem homogeneidade de fases e controle de distribuição de tamanho de partículas. Suspensões de ZEI foram desenvolvidas para a deposição por spin-coating (SC) com características que permitam a deposição de camadas do eletrólito com cerca de 10 µm de espessura em poucas etapas. Após as deposições, as meias células são co-sinterizadas em temperaturas na faixa de 1300-1500°C. A deposição de catodos à base de manganita de lantânio dopada com estrôncio (LSM) foi feita pela técnica de wet powder spray de suspensões à base de etanol. As propriedades eletroquímicas das Células a Combustível de Óxidos Sólidos (CCOSs) unitárias foram medidas na faixa de temperatura entre 600 e 800°C, usando hidrogênio umidificado (3 vol.%H 2 O) como combustível e ar como oxidante. Os principais resultados mostram que as camadas do eletrólito são homogêneas e estanques. As células exibiram voltagem de circuito aberto ~1 V e bom desempenho em temperaturas intermediárias, confirmando a boa qualidade dos eletrólitos produzidos por SC.Palavras chaves: suporte anodo, spin coating, deposição, eletrólito. ABSTRACTThe present study shows the development of anode-supported solid oxide fuel cells (SOFC) using conventional yttria stabilized zirconia (YSZ) materials and wet chemistry techniques for both the synthesis and deposition of components. Electrodes have been synthesized at IPEN by using wet chemistry techniques, which result in controlled phase composition and homogeneous particle size distribution. Ceramic suspensions of YSZ were developed for their deposition by spin coating to attain ~10 µm thick layers with a reduced number of coating steps. Half-cells (anode support/electrolyte) are co-sintered in the 1300 -1500°C temperature range. Strontium-doped lanthanum manganite cathodes were deposited by wet powder spray of ethanol-based suspensions, followed by a heat treatment at 1200°C. The electrochemical properties of single SOFCs were measured in the 600-800°C temperature range, using humidified hydrogen (3 vol. % H 2 O) as fuel and air as the oxidant. The main results evidenced that electrolyte layers are dense and homogeneous, as inferred from scanning electron microscopy analysis. Single SOFCs showed open circuit voltage of ~1V and good performance at intermediate temperatures, further confirming the gas tightness and good quality of spin coated electrolyte layers.

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Development and testing of anode-supported solid oxide fuel cells with slurry-coated electrolyte and cathode

Cited by 28 publications

References 13 publications

Infrared Spectroscopy Techniques in the Characterization of SOFC Functional Ceramics

Infrared Spectroscopy Techniques in the Characterization of SOFC Functional Ceramics

New Ionic Conductor as Solid Electrolyte for Solid Oxide Fuel Cell Application

Desenvolvimento e testes de células a combustível suportadas pelo anodo com eletrólitos depositados por spin-coating

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