Ascendable method for the fabrication of micro-tubular solid oxide fuel cells by ram-extrusion technique

Durango-Petro, Jorge Mario; Usuba, Jonathan; Valle, Hernán; Abarzua, Gonzalo; Flies, Host; Udayabhaskar, R.; Mangalaraja, Ramalinga Viswanathan

doi:10.1016/j.ceramint.2019.08.252

Cited by 13 publications

(16 citation statements)

References 59 publications

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“…The typical synthesis of NiO, GDC, and LSCF powders with corresponding precursor reagents is reported elsewhere. 28 For better crystallinity, the obtained powders were subjected to calcination (800 • C, 2 h).…”

Section: Methodsmentioning

confidence: 99%

“…For the micro-tubular electrode preparation, we followed the similar strategy that reported elsewhere. 28 The reported new ceramic paste formulation as a pre-step to the ram extrusion process was adopted for obtaining porous and mechanically sustainable micro-tubular anodes. The ceramic paste formulation consists of a liquid phase and a solid phase (ceramic powder + pore former).…”

Section: Methodsmentioning

confidence: 99%

“…Details related to rheological behavior with varying pore former versus ceramic powder and ternary plot of ceramic powder (%):pore former (%):binder (ml) was reported elsewhere. 28 The solid and liquid phases were well mixed (Prep-Mixer (Bra bender R ), 60 rpm, 20 min) and the homogeneous ceramic paste was moulded into micro-tubes by ram extrusion with a conical die of 40 mm in length (with 6 and 3 mm of external and internal diameter, respectively). The extruded tubes were left undisturbed for 5 days to dry at room temperature and hereafter they are referred as green tubes (GT) for convenience.…”

Section: Methodsmentioning

confidence: 99%

“…Further, the electrolyte slurry was obtained by the addition of additives such as polyethylene glycol (3.2%, as plasticizer), glycerol (3.2%, as plasticizer), 1-octanol (0.2%, as defoamer), 2,4,7,9-tetramethyl-5-decyne−4,7-diol ethoxylate (0.1%, as surfactant) and polyacrylic acid (1.74%, as dispersant). 28 On the other hand, the slurry for the cathode has the same proportions described above, except that 35% is LSFC-GDC as a solid charge. The final viscosity of 150 mPa was maintained for the electrolyte and cathode suspensions (SV-10 viscometer, A&D Company Limited series) at room temperature, which was ideal for coating by airbrush spraying.…”

Section: Methodsmentioning

confidence: 99%

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A feasible strategy for tailoring stable spray‐coated electrolyte layer in micro‐tubular solid oxide fuel cells

Abarzua

Udayabhaskar

Mangalaraja

et al. 2022

Int J Applied Ceramic Tech

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By this work, the viability of the spray coating as a cost‐effective and reliable technique for the coating of Ce0.9Gd0.1O1.95 (GDC) electrolyte layer on the mini‐tubular NiO–GDC anodes based a solid oxide fuel cell (SOFC) fabrication was assessed. The compatibility of the anode and electrolyte was analyzed by using XRD. The variation in thickness and morphology of the electrolyte film as a function of the coating cycles was discussed with optical and scanning electron microscopes. By similar formulation, the coating of La0.6Sr0.4Fe0.8Co0.2O3 –Ce0.9Gd0.1O2–δ (LSCF–GDC) was performed to achieve porous cathode. An individual micro‐tubular anode supported cell with configuration NiO–GDC/GDC/LSCF–GDC as anode/electrolyte/cathode was tested in the SOFC mode with humidified hydrogen as fuel and stationary air as oxidant. The fabricated mini‐SOFC prototype that generated a maximum power density of 0.510 W/cm2 at 600°C signifies the potential of this industrially scalable low‐cost coating technique.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

A feasible strategy for tailoring stable spray‐coated electrolyte layer in micro‐tubular solid oxide fuel cells

Abarzua

Udayabhaskar

Mangalaraja

et al. 2022

Int J Applied Ceramic Tech

Self Cite

View full text Add to dashboard Cite

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“…The pastes are more conductive than typical anode cermets and cathode materials and so the paste will increase the overall conductivity of the cell in the axial and radial directions, acting as a current collection layer, which is particularly important for larger cells [105,106]. Pastes can also be used to secure the electrode to the current collector and are sintered to enhance their mechanical adhesion once applied [107]. Pastes are usually hand-painted, which is a cause for concern in terms of w.r.t reproducibility and manufacturability [104].…”

Section: Conductive Pastes Paints and Inksmentioning

confidence: 99%

The Development of Current Collection in Micro-Tubular Solid Oxide Fuel Cells—A Review

2021

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Micro-tubular solid oxide fuel cells (µT-SOFCs) are suited to a broad range of applications with power demands ranging from a few watts to several hundred watts. µT-SOFCs possess inherently favourable characteristics over alternate configurations such as high thermo-mechanical stability, high volumetric power density and rapid start-up times, lending them particular value for use in portable applications. Efficient current collection and interconnection constitute a bottleneck in the progression of the technology. The development of current collector designs and configuration reported in the literature since the inception of the technology are the focus of this study.

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Manipulating and Optimizing the Hierarchically Porous Electrode Structures for Rapid Mass Transport in Solid Oxide Cells

Hou

Pan

et al. 2022

Adv Funct Materials

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Over the past decades, considerable efforts have been made to develop hierarchically porous electrodes for the high surface area, the fast velocity of fuels/products to/away from the reaction site, and the high loading of thermal-and/or electrochemical-catalysts. Manipulation of the hierarchical structure is one of the key steps for high performance in applications of efficient energy storage and conversion such as solid oxide cells. This review starts with a brief introduction to the basic concept of mass transport and how mass transport may affect performance. Then, the latest developments in enhancing the performance of cells through modification or optimization of the hierarchically porous electrode structures, including altering the geometry or morphology and increasing the triple-phase boundaries length of electrodes are summarized. Subsequently, the unique characteristics of microstructures that are critical to enhancing electrode performance and provide important insights into the mechanisms of performance (activity and durability) enhancement, aiming at achieving the rational design of better electrode architecture are highlighted. Finally, the remaining challenges for the knowledge-based design of highly efficient electrodes for electrochemical devices, together with possible directions and future perspectives for the development of highly efficient electrodes through optimization of microstructure are discussed.

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Ascendable method for the fabrication of micro-tubular solid oxide fuel cells by ram-extrusion technique

Cited by 13 publications

References 59 publications

A feasible strategy for tailoring stable spray‐coated electrolyte layer in micro‐tubular solid oxide fuel cells

A feasible strategy for tailoring stable spray‐coated electrolyte layer in micro‐tubular solid oxide fuel cells

The Development of Current Collection in Micro-Tubular Solid Oxide Fuel Cells—A Review

Manipulating and Optimizing the Hierarchically Porous Electrode Structures for Rapid Mass Transport in Solid Oxide Cells

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