Improvement of solid oxide fuel cell by imprinted micropatterns on electrolyte

Xu, Yating; Tsumori, Fujio; Osada, Toshiko; Miura, Hideshi

doi:10.1049/mnl.2013.0310

Cited by 42 publications

(33 citation statements)

References 13 publications

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“…The aim of our study is to develop a processing method of the thin and wavy YSZ sheet for SOFC electrolyte. We will introduce advanced process based on micro powder imprint (μPI) [4][5][6][7][8] in this paper.…”

Section: Sofc (Solid Oxide Fuel Cells) Is a Kind Of Fuel Cells Sofc Hasmentioning

confidence: 99%

Development of Corrugated Ceramic Sheet for SOFC Electrolyte by Micro Imprint Process

Tsumori

Tokumaru

Kudo

et al. 2016

J. Jpn. Soc. Powder Powder Metallurgy

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Yttria-stabilized zirconia (YSZ) has been used for an electrolyte of solid oxide fuel cells (SOFC). To enhance the efficiency of SOFC, we developed a corrugated, or wavy-shaped, YSZ sheet for the electrolyte. As the corrugated sheet has larger surface area than a flat-type sheet, higher energy density can be obtained. We have proposed micro powder imprint (μPI) with multi-layer imprint process to fabricate micro scale pattern on the both surfaces of a thin YSZ sheet. The μPI is a combined process of nano imprint lithography and powder metallurgy; the resolution is high, and the process is mass-productive. In this work, we selected a compound material containing YSZ powder and a binder consisting of thermoplastic resin as a starting material. The compound sheet was prepared by tape casting from slurry and was imprinted by a fine-patterned mold with stacked on a silicone rubber sheet. The silicone rubber was so flexible that micro patterns on the both sides of the compound sheet was obtained after imprint. In the present work, the process condition of μPI and the heat program of debinding and sintering were also considered. As a result, a wave-type sintered YSZ sheet without significant defects was successfully obtained.

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Section: Sofc (Solid Oxide Fuel Cells) Is a Kind Of Fuel Cells Sofc Hasmentioning

confidence: 99%

Development of Corrugated Ceramic Sheet for SOFC Electrolyte by Micro Imprint Process

Tsumori

Tokumaru

Kudo

et al. 2016

J. Jpn. Soc. Powder Powder Metallurgy

Self Cite

View full text Add to dashboard Cite

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“…Alternatively, Xu et al [6] used a process where micropatterns were imprinted on the surface of a sheet of the ceramic material. They were able to obtain a dense ceramic sheet with different micropattern geometries (100 and 500 μm of characteristic length) after debinding and sintering the ceramic sheets.…”

Section: Introductionmentioning

confidence: 99%

Optimization of laser-patterned YSZ-LSM composite cathode-electrolyte interfaces for solid oxide fuel cells

Cebollero

Laguna‐Bercero

Lahoz³

et al. 2019

Journal of the European Ceramic Society

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A B S T R A C TPatterned cathode/electrolyte interfaces formed by a hexagonal array of ∼22 μm deep wells with 24 μm lattice parameter have been prepared by pulsed laser machining to enlarge the contact surface and, consequently, to reduce the cathode polarization of Solid Oxide Fuel Cells. These new interfaces have been tested in YSZ-LSM/ YSZ/YSZ-LSM symmetrical cells, where the cathode is deposited by dip-coating. Appropriate ceramic suspensions have been formulated to penetrate into deep wells without presenting interfacial delamination after sintering. We analyse their applicability by comparing their rheology with the microstructure and electrochemical performance of the cells. The activation component of the polarization resistance is reduced by ∼50% using ethanol-based suspensions with 20 wt% solids loading, although the gas diffusion component increases due to excessive densification. Alternative ceramic suspensions with 17.5 wt% solids loading provide optimum electrode gas diffusion but lower activation components, resulting in an overall decrease of ∼20% in polarization resistance.

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“…In the process of forming ceramic micro channels, micro powder imprinting method, which has been developed by our group [6][7][8][9][10][11][12][13] , was employed in order to fabricate alumina compound sheets with surface patterns. The micro powder imprinting method has been proposed to enable micro patterning on the surface of ceramic sheets.…”

Section: Introductionmentioning

confidence: 99%

Wavy Micro Channels in Micropatterned Ceramic Sheet Formed by Combined Process of Laser Beam Machining and Imprinting

Tsumori

Hunt

Kudo

et al. 2016

J. Jpn. Soc. Powder Powder Metallurgy

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Micro channels made of polymers are commonly used for MEMS and μTAS (micro-total analysis system) devices. In this research, we developed a process for fabricating a ceramic sheet with micro channels. The developed process is based on powder metallurgy process. A compound material, a mixture of ceramic powder and polymer, was prepared as sheet material. We employed laser machining to machine the sacrificial layer to form micro channels inside the sheet. We also employed imprinting, which is a process of pressing with a mould while heating, to form a structure with surface patterns and micro channels curving along with it. After the imprinted sheet was debound and sintered by heating, a ceramic sheet with micro-surface patterns and micro channels was obtained. As ceramics have high heat durability and low chemical reactivity, ceramic micro channels can be used for flow sensors or chemical reaction testers operated in harsh environments, such as high temperature or mechanical parts operated with reactive chemicals. In addition, by imprinting wavy patterns, the surface area can be increased. Therefore high efficiency heat exchangers can be built. Moreover, this method can be applied on SOFCs (solid oxide fuel cell) by fabricating YSZ (yttria stabilized zirconia) micro channels.

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Improvement of solid oxide fuel cell by imprinted micropatterns on electrolyte

Cited by 42 publications

References 13 publications

Development of Corrugated Ceramic Sheet for SOFC Electrolyte by Micro Imprint Process

Development of Corrugated Ceramic Sheet for SOFC Electrolyte by Micro Imprint Process

Optimization of laser-patterned YSZ-LSM composite cathode-electrolyte interfaces for solid oxide fuel cells

Wavy Micro Channels in Micropatterned Ceramic Sheet Formed by Combined Process of Laser Beam Machining and Imprinting

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