Microextrusion printing for increasing electrode–electrolyte interface in anode-supported solid oxide fuel cells

Seo, Haewon; Kishimoto, Masashi; Ding, Changsheng; Saito, Motohiro; Yoshida, Hideo

doi:10.1016/j.jpowsour.2019.227682

Cited by 36 publications

(48 citation statements)

References 32 publications

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“…Using a self-made lab-scale 3D printer, which comprises motorized x-y-axis stages, a manual z-axis stage, and a syringe pump as schematically shown in Figure 1, the slurry was printed in a line shape on the surface of the flat green disk in a target region of 20 mm 20 mm. More details of the 3D printer can be found in literature [20]. The slurry was placed into a gas-tight syringe after degassing, then a nozzle tip with an inner diameter of 100 mm (Nordson Corp., USA) was attached to the end of the syringe.…”

Section: Anode Fabrication and Evaluationmentioning

confidence: 99%

“…A YSZ electrolyte thin film was prepared by spin coating [20]. A mixture of 10.0 wt.% YSZ powder, 0.8 wt.% polyveryl butyral (PVB) (Sigma-Aldrich Co., LLC, USA), and 89.2 wt.% ethanol was added dropwise onto the presintered anode disk and immediately spun at 3,000 rpm for 30 s. After 20 cycles of spin coating, the NiO-YSZ anode and YSZ electrolyte were cosintered at 1,350°C for 5 h at heating and cooling rates of 120 and 200°C h -1 , respectively.…”

Section: Cell Preparationmentioning

confidence: 99%

“…After the electrochemical testing, the anode ridge structures and GDC nanoparticles were observed by scanning electron microscopy (SEM). For the mesostructure observation, the tested cells were impregnated with epoxy resin (EpoFix, Struers, Denmark) under a vacuum condition, which was followed by cutting and then polishing to observe the cross sections by SEM (Miniscope TM3000, Hitachi High-Tech Corp., Japan) [20]. For the nanostructure observation, small pieces of the cells whose cathode materials were LSCF and LSCF-GDC were mounted on a specimen stub and painted with a silver paste (Ted Pella, Inc., USA) to prevent electrostatic charging during the SEM observation.…”

Section: Structure Observationmentioning

confidence: 99%

“…As another approach to increasing the density of reaction sites, extending the electrode-electrolyte interfacial area by fabricating a mesostructure in the range of 10-100 mm at the interface [7,[13][14][15][16][17][18][19][20] is attracting widespread attention. Cebollero et al [16,19] fabricated symmetrical cells with an extended interfacial area between a cathode and an electrolyte using a laser machining process.…”

mentioning

confidence: 99%

“…We also investigate whether or not the mesoscale and nanoscale structural modifications have a synergistic effect in the performance improvement. First, NiO-YSZ anode ridge structures are fabricated on the surface of a flat NiO-YSZ anode disk using a microextrusion printing technique proposed in our previous report [20]. Subsequently, a YSZ electrolyte, a GDC barrier layer, and an LSCF cathode are prepared.…”

mentioning

confidence: 99%

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Improvement in the Electrochemical Performance of Anode‐supported Solid Oxide Fuel Cells by Meso‐ and Nanoscale Structural Modifications

et al. 2020

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To improve the electrochemical performance of anode-supported solid oxide fuel cells (SOFCs), microextrusion printing and wet infiltration techniques are employed for structural modification on the meso-(10-100 mm) and nanoscale order, respectively. In the mesoscale structural modification, anode ridge structures are fabricated by extruding an anode slurry on the surface of a flat anode disk to extend the electrodeelectrolyte interfacial area. In the nanoscale structural modification, gadolinium-doped ceria (GDC) nanoparticles are introduced into a porous lanthanum strontium cobalt ferrite (LSCF) cathode. To investigate the effects of mesoscale and nanoscale structural modifications, four different types of anode-supported SOFC including a conventional cell are prepared , and their performance is evaluated at several operating temperatures. It is found that both the mesoscale and nanoscale structural modifications reduce not only the polarization resistance but also the ohmic resistance in the cells, resulting in the improvement in cell performance. Moreover, it is clarified that the improvement in cell performance becomes greater with decreasing operating temperature. Specifically, the maximum power density in the cell where both mesoscale and nanoscale structural modifications are applied is increased by 66% at 600°C and 34% at 700°C, compared with that in the conventional cell.

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Section: Anode Fabrication and Evaluationmentioning

confidence: 99%

Section: Cell Preparationmentioning

confidence: 99%

Section: Structure Observationmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Improvement in the Electrochemical Performance of Anode‐supported Solid Oxide Fuel Cells by Meso‐ and Nanoscale Structural Modifications

et al. 2020

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A review on the preparation of anode materials and anode films for solid oxide fuel cell applications

Hadi

Somalu

Osman

et al. 2021

Intl J of Energy Research

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The primary components of SOFCs are the anode, cathode, and the electrolyte. Anode is critical in achieving the effective electrochemical oxidation of fuel; thus, its performance can be improved using homogenous powder synthesized through an appropriate method. Various synthesis methods, including solidstate reaction and wet chemical methods have been used to synthesize anode materials. However, each technique has several advantages and disadvantages.Given that anode is a porous electrode, few criteria, such as high conductivity, tolerance towards carbon deposition, chemical stability, and thermal stability, must be fulfilled. Researchers also modified the existing synthesis method to improve the performance of the anode. In addition, various anode fabrication techniques including physical and colloidal deposition techniques are briefly discussed to understand their effect on the performance of the deposited layers.The aim of this review is to discuss the various anode synthesis and deposition techniques and their influence on the properties and performance of SOFCs.

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Temperature‐controlled microextrusion printing for mesoscale interfacial designing in solid oxide fuel cells

2023

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A temperature-controlled microextrusion printing technique is proposed to realize the increased aspect ratio of mesoscale convex structures at the anodeelectrolyte interface in solid oxide fuel cells (SOFCs). The rheological properties of the anode ink for microextrusion printing are experimentally measured at various temperatures, and it is found that the viscosity of the ink and the wettability of the ink to the anode substrate decrease at lower temperatures, which is desirable for the ink to retain its shape on the substrate. The anode-supported SOFC button cells are fabricated by microextrusion printing with and without temperature control and compared in terms of their interfacial structures and electrochemical performance. The aspect ratio of the interfacial structure is increased from 0.16 to 0.28 by lowering the ink temperature, resulting in a higher interface enlargement of 25%. Owing to the enlarged interfacial area, enhanced cell performance is also achieved.

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Microextrusion printing for increasing electrode–electrolyte interface in anode-supported solid oxide fuel cells

Cited by 36 publications

References 32 publications

Improvement in the Electrochemical Performance of Anode‐supported Solid Oxide Fuel Cells by Meso‐ and Nanoscale Structural Modifications

Improvement in the Electrochemical Performance of Anode‐supported Solid Oxide Fuel Cells by Meso‐ and Nanoscale Structural Modifications

A review on the preparation of anode materials and anode films for solid oxide fuel cell applications

Temperature‐controlled microextrusion printing for mesoscale interfacial designing in solid oxide fuel cells

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