Mechanical behaviour of multi-layer half-cells of microtubular solid oxide fuel cells fabricated by the co-extrusion process

Mani, Behtash

doi:10.1016/j.ceramint.2015.11.093

Cited by 17 publications

(5 citation statements)

References 10 publications

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“…Various methods have been applied to prepare tubular SOFC supports, including compaction (12,13), extrusion (14)(15)(16), gel-casting (17,18), phase inversion (19)(20)(21), freeze casting (22,23), slip casting (24)(25)(26), tape-casting coupled with lamination (27)(28)(29), electrophoretic deposition (30,31), and dip-coating (32)(33)(34)(35). Dip-coating stands out among the mentioned methods as a simple process with promising reproducibility, high contact quality, and low capital cost (11,33).…”

Section: Introductionmentioning

confidence: 99%

Micro-Tubular Solid Oxide Fuel Cells with One Closed-End Fabricated Via Dip-Coating and Co-Firing

Hedayat

2021

ECS Trans.

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The tubular solid oxide fuel cells (SOFCs) with one closed-end configuration have high thermal-cycling tolerance owing to the capability of expanding and shrinking freely in response to thermal stresses. The tubular cells with one closed-end have simple sealing requirements, and enable making the stacks with uniform temperature distribution. In this study, anode supported micro-tubular SOFCs with one closed-end were manufactured successfully by dip-coating and co-firing methods using carbon rods as a template. A dense electrolyte layer was obtained at a co-firing temperature of 1400°C, followed by cathode deposition and sintering. The prepared micro-tubular SOFCs were comprised of Ni-yttria-stabilized zirconia, Ni–scandia-stabilized zirconia (SSZ), SSZ, strontium-doped lanthanum manganite (LSM)-SSZ, and LSM as the anode support, anode functional layer, electrolyte, cathode functional layer, and cathode current collector, respectively. The developed dip-coating method is fast in turnaround time and enables fabricating the one closed-end tubes of various lengths and diameters by co-firing.

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Section: Introductionmentioning

confidence: 99%

Micro-Tubular Solid Oxide Fuel Cells with One Closed-End Fabricated Via Dip-Coating and Co-Firing

Hedayat

2021

ECS Trans.

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“…The manufacturing of planar cells is inexpensive because they can be prepared by simple and potentially low-cost fabrication processes such as tape-casting and screen printing (7). Various methods have been used to manufacture tubular SOFC supports, including iso-pressing (11), extrusion (7,12), plasma spaying (9), sequential dip-coating (13,14), slip-casting (15), freeze-casting (16,17), and tape-casting (18,19).…”

Section: Introductionmentioning

confidence: 99%

Tubular Solid Oxide Fuel Cells Fabricated by Tape-Casting and Dip-Coating Methods

Hedayat

2019

ECS Trans.

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Tubular anode-supported solid oxide fuel cells (SOFCs) generate lower current densities than the planar SOFCs, but they have several advantages such as ease of sealing, high durability, and thermal-cycling stability. In this study, tubular anode supported SOFCs were fabricated by coupling the tape-casting and dip-coating methods. An anode support tape-cast was rolled into tubular shape over a mandrel. The seam joined to form a tube by solvent-assisted lamination at room temperature. The sample was pre-sintered at 900 °C, followed by dip-coating and co-sintering of the electrolyte at 1400 °C. The cathode layers were dip-coated onto the electrolyte and sintered at 1150 °C. The electrochemical performance of the prepared tubular SOFC was evaluated in N2/H2 gas at 650–800 °C. The cell exhibited a maximum power density of 281 mW cm-2 at 800 °C. The results confirmed that using simple low-cost methods including tape-casting, solvent-assisted lamination and dip-coating has the potential for the mass production of tubular SOFCs.

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“…For example, ceramic core-shell rods based on zirconia and/or other ceramic materials have been applied as PZT actuators [3], bioceramic implants with a bone structure [7][8][9], solid oxide fuel cells [10,11] or as oxygen separation membranes [12,13]. Such structures can be fabricated by many methods such as freeze casting [5,7,14,15], slip casting or extrusion followed by a coating process [6,16,17], electrophoretic deposition [18], and co-extrusion [3,4,19,20]. The last mentioned method, co-extrusion, exhibits many processing advantages such as simple production with excellent interface between the core and shell materials, lowcost production and better mechanical properties of coextruded bodies compared with other shaping methods [16,21,22].…”

Section: Introductionmentioning

confidence: 99%

“…Such structures can be fabricated by many methods such as freeze casting [5,7,14,15], slip casting or extrusion followed by a coating process [6,16,17], electrophoretic deposition [18], and co-extrusion [3,4,19,20]. The last mentioned method, co-extrusion, exhibits many processing advantages such as simple production with excellent interface between the core and shell materials, lowcost production and better mechanical properties of coextruded bodies compared with other shaping methods [16,21,22]. During ceramic extrusion, a ceramic paste, often referred to as feedstock, is pushed through a shaping nozzle.…”

Section: Introductionmentioning

confidence: 99%

“…In the co-extrusion process, two or more feedstocks are extruded simultaneously. There are two basic possibilities of feedstock arrangement for ceramic co-extrusion: i) the multi-channel or multi-billet extrusion [16,[23][24][25], and ii) co-extrusion of a preform, which is often referred to as feed rod, with serial [20,[26][27][28] or parallel [3,4,19,29,30] ordering of feedstocks in the feed rod. Recently, Kastyl et al [4] have reported on bimaterial core-shell rods composed of dense zirconia toughened alumina (ZTA) core and dense alumina shell that exhibited a combination of high surface hardness of alumina with high fracture force in bending that even exceeded the value of monolithic ZTA.…”

Section: Introductionmentioning

confidence: 99%

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Co-extrusion of zirconia core-shell rods with controlled porosity in the core

Kaštyl

Pouchlý

Trunec

2018

PAC

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A method for manufacturing bi-layered zirconia rods of core-shell geometry with a porous core and a dense shell has been developed. Core-shell rods were successfully prepared by thermoplastic co-extrusion of assembled feed rods composed of core and shell zirconia feedstocks. Rheological analysis and adjustment of the feedstock viscosities enabled co-extrusion of regular core-shell rods of uniform shell thickness. Tapioca starch was used as a pore-forming agent in the core feedstock. Binder removal and high temperature treatment had to be modified in order to safely remove the starch particles. Sintering analysis revealed constrained sintering of porous cores in the core-shell rods due to the rigid dense shell, which resulted in an increased porosity in the core. Defect-free core-shell rods with a core porosity of up to 40% and different thicknesses of the dense shell were prepared.

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Mechanical behaviour of multi-layer half-cells of microtubular solid oxide fuel cells fabricated by the co-extrusion process

Cited by 17 publications

References 10 publications

Micro-Tubular Solid Oxide Fuel Cells with One Closed-End Fabricated Via Dip-Coating and Co-Firing

Micro-Tubular Solid Oxide Fuel Cells with One Closed-End Fabricated Via Dip-Coating and Co-Firing

Tubular Solid Oxide Fuel Cells Fabricated by Tape-Casting and Dip-Coating Methods

Co-extrusion of zirconia core-shell rods with controlled porosity in the core

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