Design and Fabrication of a Novel Electrode‐Supported Honeycomb SOFC

Yamaguchi, Toshiaki; Shimizu, Sota; Suzuki, Toshio; Fujishiro, Yoshinobu; Awano, Masanobu

doi:10.1111/j.1551-2916.2008.02688.x

Cited by 22 publications

(13 citation statements)

References 22 publications

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“…Their results showed good thermo-mechanical properties and enhanced performance for the fuel cell. Yamaguchi et al [7] fabricated a cathode-supported honeycomb SOFC via extrusion of a monolith and used a slurry injection method for the channel surface coating in order to increase the volumetric power density. Ruiz-Morales et al [8] fabricated a honeycomb electrolyte to reduce the electrolyte thickness and increase the structure's mechanical strength.…”

Section: Introductionmentioning

confidence: 99%

Additive manufacturing and mechanical characterization of high density fully stabilized zirconia

Ghazanfari

Leu

et al. 2017

Ceramics International

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Mechanical properties of additively manufactured 8 mol% yttria-stabilized zirconia (8YSZ) parts were extensively studied for the first time. A novel freeform extrusion fabrication process, called Ceramic On-Demand Extrusion (CODE), was employed to deposit an aqueous viscous suspension (~50 vol% solids loading) of fully stabilized zirconia powder in a layer-by-layer fashion. Each layer was exposed to infrared radiation after deposition to attain partial solidification due to drying. Before exposure, the layer was surrounded by oil to preclude nonuniform evaporation, which could cause warpage and crack formation. After the fabrication process was completed, the parts were humid-dried in an environmental chamber and densified by sintering under atmospheric pressure. Standard test methods were employed to examine the properties of sintered parts including density, Vickers hardness, fracture toughness, Young's modulus, and flexural strength. Microstructural evaluation was also performed to observe the

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Section: Introductionmentioning

confidence: 99%

Additive manufacturing and mechanical characterization of high density fully stabilized zirconia

Ghazanfari

Leu

et al. 2017

Ceramics International

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“…Therefore, the selection of adequate shaping techniques is critical for the production of such layered structures. Several shaping techniques have been used for the manufacture of porous LSM electrodes, including pressing [22], extrusion [24], screen printing [25], dip coating [26], and tape casting [27,28]. Another way to improve the efficiency of the cell is maximizing the contact area between electrode and electrolyte, for instance, by pulsed laser machining of YSZ and subsequent dip coating of an LSM/YSZ composite [29].…”

Section: Introductionmentioning

confidence: 99%

Colloidal Processing of Y0.08Zr0.92O2/La0.80Sr0.20MnO3 Semi-Cells Using a Sr-Doped Lanthanum Manganite Synthesized by a Citrate Route

2021

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In this paper, the interface between yttria stabilized zirconia (Y0.08Zr0.92O2, YSZ) electrolyte and Sr-doped lanthanum manganite (La0.80Sr0.20MnO3, LSM) cathode for solid oxide fuel cells (SOFCs) is studied. For such a purpose, the combination of a suitable synthesis route for obtaining fine powders and simple aqueous colloidal shaping routes is proposed. The synthesis of nanosized particles of La0.80Sr0.20MnO3 by a citrate route and their full characterization, including the colloidal stability and the densification and phase development determined by X-ray diffraction and electron microscopy at different temperatures, is reported. In a second step, YSZ tapes were obtained by aqueous tape casting and used as substrates for the preparation of LSM coatings by dip-coating using aqueous slurries. YSZ tapes were used either in the green state or after a pre-sintering treatment. Co-sintering at 1350 °C led to a sharp interface with excellent adhesion, also achieved when coating pre-sintered tapes. In both cases, the substrates are dense and the coatings are porous, with thicknesses of 85 and 60 μm for green and pre-sintered tapes, respectively. No diffusion of Zr and Y occurs at the LSM layer, but some diffusion of La and Mn towards the YSZ layer takes place.

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“…In particular, forming LSM ceramics is crucial in the design and fabrication of cathode-supported SOFCs [13], which is associated not only with structures and shapes but also with manufacturing costs. Currently, a variety of forming techniques, including dry pressing [14,15], dip coating [7], screen-printing [16], tape casting [17], gel casting [18,19,20] and extrusion molding [21], have been utilized to fabricate porous LSM ceramic electrodes for planar, tubular and honeycomb cathode-supported SOFCs. However, it is still a challenging task for the development of advanced shaping technologies to meet urgent demands of geometrical optimization and cost reduction in the rapidly growing area of cathode-supported SOFCs in micro/meso-scale.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Lanthanum Strontium Manganite Ceramics via Agar Gel Casting and Solid State Sintering

et al. 2019

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Fabricating lanthanum strontium manganite (LSM) ceramics with certain shapes is important for the design and construction of high-temperature energy conversion and storage devices. Here, we describe a low-cost and environmentally friendly method for fabricating LSM ceramics via agar gel casting and high temperature sintering. This new approach uses temperature tuning to fabricate LSM gel bodies, not only by manufacturing in the secondary process but also by remolding and recycling during the gel casting process. The effect of the sintering temperature on the properties of LSM ceramics was investigated as well. As a result, the porosity and compressive strength of LSM ceramics sintered at 1000 °C are ~60% and 5.6 MPa, respectively. When the sintering temperature increases to 1200 °C, the porosity decreases to ~28%, whereas the compressive strength increases to 25 MPa, which is able to meet the requirement of cathode-supported SOFCs (solid oxide fuel cells).

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Design and Fabrication of a Novel Electrode‐Supported Honeycomb SOFC

Cited by 22 publications

References 22 publications

Additive manufacturing and mechanical characterization of high density fully stabilized zirconia

Additive manufacturing and mechanical characterization of high density fully stabilized zirconia

Colloidal Processing of Y0.08Zr0.92O2/La0.80Sr0.20MnO3 Semi-Cells Using a Sr-Doped Lanthanum Manganite Synthesized by a Citrate Route

Fabrication of Lanthanum Strontium Manganite Ceramics via Agar Gel Casting and Solid State Sintering

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