YSZ films fabricated by a spin smoothing technique and its application in solid oxide fuel cell

Wang, Jiaming; Lü, Zhe; Huang, Xiqiang; Chen, Kongfa; Ai, Na; Hu, Jinyan; Su, Wenhui

doi:10.1016/j.jpowsour.2006.09.064

Cited by 38 publications

(16 citation statements)

References 19 publications

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“…Directly reducing the electrolyte thickness offers a comparatively simple and effective way to achieve high cell performance. While methods such as dry-pressing [22], tape casting [23], screen printing [24], slurry spin-coating [25][26][27][28], etc., are readily available to fabricate electrolytes like Samaria-doped ceria (SDC), yttria-stabilized zirconia (YSZ), the approach used most frequently to prepare BaZr 0.1 Ce 0.7 Y 0.2 O 3-d (BZCY) electrolyte based fuel cells has been limited to dry-pressing [29,30] or spray-coating [31][32][33] to date. Dry pressing method is a cost-effective method.…”

Section: Introductionmentioning

confidence: 99%

A Performance Study of Solid Oxide Fuel Cells With BaZr_0.1Ce_0.7Y_0.2O_3–δ Electrolyte Developed by Spray‐Modified Pressing Method

et al. 2012

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Fuel cells with BaZr0.1Ce0.7Y0.2O3–δ (BZCY) proton‐conducting electrolyte is fabricated using spray‐modified pressing method. In the present study the spray‐modified pressing technology is developed to prepare thin electrolyte layers on porous Ni‐BZCY anode supports. SEM data show the BZCY electrolyte film is uniform and dense, well‐bonded with the anode substrate. An anode‐supported fuel cell with BZCY electrolyte and Ba0.5Sr0.5Co0.8Fe0.2O3–δ (BSCF) cathode is characterized from 600 to 700 °C using hydrogen as fuel and ambient air as oxidant. Maximum power density of 536 mW cm–2 along with a 1.01 V OCV at 700 °C is obtained. Impedance spectra show that Ohmic resistances contribute minor parts to the total ones, for instance, only ~23% when operating at 600 °C. The results demonstrate that spray‐modified pressing technology offers a simple and effective way to fabricate quality electrolyte film suitable to operate in intermediate temperature.

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Section: Introductionmentioning

confidence: 99%

A Performance Study of Solid Oxide Fuel Cells With BaZr_0.1Ce_0.7Y_0.2O_3–δ Electrolyte Developed by Spray‐Modified Pressing Method

et al. 2012

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“…While electrolyte supported cell (ESC) technology has an established open circuit voltage (OCV) greater than 1.1 V, anode supported cell (ASC) technology often yield lower OCVs [6][7][8]. This unfortunate phenomenon is often attributed to defects within the YSZ electrolyte, and not leak current as with some ceria-based electrolytes [9].…”

Section: Introductionmentioning

confidence: 99%

Thin film YSZ coatings on functionally graded freeze cast NiO/YSZ SOFC anode supports

et al. 2008

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Intermediate temperature (600-800°C) solid oxide fuel cell (SOFC) technology is often limited by inadequate gas transport in electrodes, and high ion transport resistance electrolytes. In this study, large area filtered arc deposition (LAFAD) and hybrid filtered arc-assisted e-beam physical vapor deposition (FA-EBPVD) technologies, in combination with freeze-tape-casting, were used to fabricate SOFC anode/electrolyte bi-layers with functionally graded porous anode microstructures and thin film electrolytes favorable for both gas transport and low resistance. Traditionally-processed NiO/YSZ in addition to freeze-tape-cast NiO/YSZ anode substrates were fabricated and subsequently coated with thin film (\1-20 lm) YSZ via LAFAD and FA-EBPVD. LAFAD was found to be effective in applying thin (*1 lm) dense YSZ films on porous substrates at *400°C. FA-EBPVD produced relatively thick (*10-20 lm) dense YSZ coatings on porous substrates, with columnar morphology and nano-metrical grain size. A *10 lm FA-EBPVD YSZ coating was observed to bridge NiO/YSZ surface pores of *10 lm, which typically requires pre-filling prior to conventional thin film coating processes. Coated substrates exhibited negligible curvature, yielding flat anode/electrode bi-layers up to 2.5 cm in diameter. These results are presented with conderations for future SOFC development discussed.

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“…As suspensões utilizadas na deposição do eletrólito foram preparadas usando uma mistura de terpineol com etil celulose [10][11][12][13][14][15][16], e concentração de sólidos entre 20% e 40%. A suspensão do anodo funcional, a camada interfacial entre o anodo e o eletrólito, foi preparada com concentração de sólidos de 30% em uma mistura de terpineol e etil celulose.…”

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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YSZ films fabricated by a spin smoothing technique and its application in solid oxide fuel cell

Cited by 38 publications

References 19 publications

A Performance Study of Solid Oxide Fuel Cells With BaZr_0.1Ce_0.7Y_0.2O_3–δ Electrolyte Developed by Spray‐Modified Pressing Method

A Performance Study of Solid Oxide Fuel Cells With BaZr_0.1Ce_0.7Y_0.2O_3–δ Electrolyte Developed by Spray‐Modified Pressing Method

Thin film YSZ coatings on functionally graded freeze cast NiO/YSZ SOFC anode supports

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

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YSZ films fabricated by a spin smoothing technique and its application in solid oxide fuel cell

Cited by 38 publications

References 19 publications

A Performance Study of Solid Oxide Fuel Cells With BaZr0.1Ce0.7Y0.2O3–δ Electrolyte Developed by Spray‐Modified Pressing Method

A Performance Study of Solid Oxide Fuel Cells With BaZr0.1Ce0.7Y0.2O3–δ Electrolyte Developed by Spray‐Modified Pressing Method

Thin film YSZ coatings on functionally graded freeze cast NiO/YSZ SOFC anode supports

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

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A Performance Study of Solid Oxide Fuel Cells With BaZr_0.1Ce_0.7Y_0.2O_3–δ Electrolyte Developed by Spray‐Modified Pressing Method

A Performance Study of Solid Oxide Fuel Cells With BaZr_0.1Ce_0.7Y_0.2O_3–δ Electrolyte Developed by Spray‐Modified Pressing Method