Dip-coating of 8YSZ nanopowder for SOFC applications

Tikkanen, Hanna; Suciu, Crina; Wærnhus, Ivar; Hoffmann, Alex C.

doi:10.1016/j.ceramint.2011.05.006

Cited by 21 publications

(14 citation statements)

References 38 publications

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“…After depositing a second LSCF layer, no disconnected regions were identified by the SEM analysis. The improved wetting in the additional dip-coatings would be due to the enhanced capillary force generated from the previously deposited porous LSCF layer on the tubular single cells (Yamaguchi et al, 2007;Tikkanen et al, 2011). Generally, the thickness of the cathode was found to increase from 2.5 to 25 µm as the number of dip-coatings varied from one to six.…”

Section: Electrical Resistancementioning

confidence: 97%

Cathode Optimization for an Inert-Substrate-Supported Tubular Solid Oxide Fuel Cell

et al. 2018

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Inert-substrate-supported tubular solid oxide fuel cells with multi-functional layers were fabricated in this work. The tubular single cells consisted of a porous yttria-stabilized zirconia inert-substrate supporting layer, a Ni anode current collecting layer, a NiCe 0.8 Sm 0.2 O 1.9 anode electrochemical layer, an yttria-stabilized zirconia/Ce 0.8 Sm 0.2 O 1.9 bi-layer electrolyte, and a La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3−δ cathode. Thickness of the La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3−δ cathode layer could be varied from 2.5 to 25.0 µm by controlling the number of dip-coatings in the single cell fabrication process. Electrochemical performance of the tubular single cells was investigated as a function of cathode thickness. Area specific resistance and maximum power density of the single cell were significantly affected by the thickness of the cathode. Increasing the cathode thickness to 15 µm was effective in reducing the sheet resistance of the layer and the area specific resistance of the single cell. Further increasing the cathode thickness induced a higher electrode polarization loss, which originated from insufficient gas diffusion and transport processes. Therefore, the optimum thickness of the La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3−δ cathode layer was determined to be 15 µm. At 800 • C, the tubular single cell with the optimum cathode thickness displayed the highest observed maximum power density of 559 mWcm −2 under the hydrogen/air operation mode. Additionally, the tubular single cell exhibited good thermal cycling stability between 800 and 25 • C for five cycles. These results illustrate the advantages of this system for future applications of the inert-substrate-supported tubular single cells in repeated startup and shut down conditions.

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Section: Electrical Resistancementioning

confidence: 97%

Cathode Optimization for an Inert-Substrate-Supported Tubular Solid Oxide Fuel Cell

et al. 2018

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“…Other slurry based processes have also been applied to SOFCs such as ink jet printing, dip coating, spraying, spin coating, and while they have produced effective results they have not quite found the same widespread penetration of screen printing and tape casting. This could be due to a number of factors such as slower deposition times or the need for inherently batch‐based production.…”

Section: Thick Film Processingmentioning

confidence: 99%

Trends in the processing and manufacture of solid oxide fuel cells

Cassidy

2017

WIREs Energy & Environment

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Electrochemical devices based on solid‐state ceramic materials such as solid oxide fuel cells (SOFCs) and solid oxide electrolysis cells (SOECs) are promising technologies which are gaining importance in today's rapidly developing energy frameworks. In particular, these high‐temperature variants offer further potential benefits such as increased fuel flexibility and higher system efficiencies. One of the significant challenges for SOFCs is the creation of robust, durable, and affordable cells. While the search for new materials remains an important research activity, the role of process development for fabrication and manufacture should not be underestimated. Indeed better understanding between materials, processing, and the resulting microstructure is vital for improving cell performance. The links between cell design and various processing techniques are explored. The most common approaches are based on thick film ceramic processes where recent trends include areas such as production of thinner tape cast layers and challenges in the application of aqueous systems to cell processing. Decoupling the processing and control of bulk and catalytic microstructures within the cell has recently been a very active area of development with techniques such as impregnation and exsolution showing increasingly promising results. Thin film techniques such as physical vapor deposition are also still being investigated for micro SOFCs or thin interfacial layers. In all cases, materials and process development should be closely linked, as high quality, reliable microstructures are essential to optimize the chemistry taking place on the materials and viable routes to manufacture are vital to transferring new materials into commercial devices. WIREs Energy Environ 2017, 6:e248. doi: 10.1002/wene.248 This article is categorized under: Fuel Cells and Hydrogen > Science and Materials

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“…In this paper, La 1-x Sr x MnO 3 (x=0.1) was synthesized via a modified sol-gel route [21,22]. The present paper aims to obtain nanosized LSMO at the lowest temperature possible, to investigate the influence of calcination periods on the formation of LSMO, and to determine the magnetic properties of the synthetized nanopowders.…”

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confidence: 99%

Structural and Magnetic Properties of La0.9Sr0.1MnO3 Nanoparticles Prepared via Sol-gel Process

Marincaş¹,

Goga²,

Dudric³

et al. 2019

Rev. Chim.

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In the present paper, nanosized La0.9Sr0.1MnO3 particles were synthesized via a facile modified sol-gel route using two cheap and environmentally friendly organic chemicals, namely sucrose and pectin. The obtained powders were characterized by thermo gravimetric analysis (TGA), X-ray diffraction (XRD), transmission electron microscopy (TEM), and magnetic measurements. The optimal temperature for obtaining nanosized particles was determined as 1000�C and 1h dwell time was enough to obtain crystalline nanoparticles. Magnetic properties of samples calcined with different calcination period were analyzed and both samples shown a transition temperature around 274 K.

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Dip-coating of 8YSZ nanopowder for SOFC applications

Cited by 21 publications

References 38 publications

Cathode Optimization for an Inert-Substrate-Supported Tubular Solid Oxide Fuel Cell

Cathode Optimization for an Inert-Substrate-Supported Tubular Solid Oxide Fuel Cell

Trends in the processing and manufacture of solid oxide fuel cells

Structural and Magnetic Properties of La0.9Sr0.1MnO3 Nanoparticles Prepared via Sol-gel Process

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