High-performance ultra-thin film solid oxide fuel cell using anodized-aluminum-oxide supporting structure

Hong, Soonwook; Bae, Jiwoong; Koo, Bongjun; Kim, Young‐Beom

doi:10.1016/j.elecom.2014.07.008

Cited by 66 publications

(26 citation statements)

References 17 publications

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“…However, the cell performance was very low (<1 mW cm −2 at 550°C) due to physical defects induced by the chemical etching process leading to chemical shorting through the electrolyte. ALD YSZ electrolytes on a nanoporous substrate ALD thin films have also been widely employed as dense electrolytes for nanoporous substrates (e.g., anodized aluminum-oxide (AAO))-based MEA designs [59][60][61][62][63][64][65][66][67][68][69][70][71]. In 2011, ALD Al 2 O 3 , which is not an ionic conductor, was used to fabricate gas-tight electrolytes by physically filling pinholes and voids.…”

Section: Ald Ysz For 3d Structured Electrolytesmentioning

confidence: 99%

“…Cha's group reported the use of an ALD YSZ layer at the anode to impede reduction of doped CeO 2 (GDC or YDC) at elevated temperature [60,61,70,71]. By adopting the ALD YSZ layer, the OCV increased from ∼0.3 V to >1.0 V. Hong et al reported anodized aluminum oxide (AAO)-based SOFCs with a 180 nm layer of YSZ electrolyte fabricated by ALD [62]. In this study, pinholes could be avoided even with a much thinner electrolyte using ALD-fabricated YSZ as compared to sputtered YSZ-only electrolytes (0.5-1 μm) for a perfect gas permeation block with high OCV value of about 1.05 V. By optimizing the thickness of an ALD-fabricated YSZ-only electrolyte, they achieved 5.5 times higher performance than the cell with a 500 nm thick layer.…”

Section: Ald Ysz For 3d Structured Electrolytesmentioning

confidence: 99%

“…First, when the ALD oxide is employed as the electrolyte, the blocking effect of gas permeation as well as electronic conduction (when it is used with a doped CeO 2 electrolyte) is clearly shown by high OCV [68], and therefore the use of much thinner electrolytes become possible [62] while the ionic conductivity is comparable to or slightly lower than that of the bulk counterpart (in YSZ case) [52,57]; additionally, the high exchange current density due to the high surface GB density of ALD oxide leads to less activation loss, the combined effects of which improve the MPD of the thin-film SOFC by up to a few times [52, 61, 62, 68, 71, 74].…”

Section: Quantitative Comparison In Performance Enhancementmentioning

confidence: 99%

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Review on process-microstructure-performance relationship in ALD-engineered SOFCs

Shin

Kye

et al. 2019

J. Phys. Energy

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Solid oxide fuel cells (SOFCs) are promising candidates for next-generation energy conversion devices, and much effort has been made to lower their operating temperature for wider applicability. Recently, atomic layer deposition (ALD), a novel variant of chemical vapor deposition, has demonstrated interesting research opportunities for SOFCs due to its unique features such as conformality and precise thickness/doping controllability. Individual components of SOFCs, namely the electrolyte, electrolyte-electrode interface, and electrode, can be effectively engineered by ALD nanostructures to yield higher performance and better stability. While the particulate or porous structures may benefit the electrode performance by maximizing the surface area, the dense film effectively blocks the chemical or physical shorting even at nanoscale thickness when applied to the electrolyte, which helps to increase the performance at low operating temperature. In this article, recent examples of the application of ALD-processed nanostructures to SOFCs are reviewed, and the quantitative relationship between ALD process, ALD nanostructure and the performance and stability of SOFCs is elucidated. Abbreviations

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Section: Ald Ysz For 3d Structured Electrolytesmentioning

confidence: 99%

Section: Ald Ysz For 3d Structured Electrolytesmentioning

confidence: 99%

Section: Quantitative Comparison In Performance Enhancementmentioning

confidence: 99%

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Review on process-microstructure-performance relationship in ALD-engineered SOFCs

Shin

Kye

et al. 2019

J. Phys. Energy

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“…Therefore, LT-SOFC with a sub-micrometer-thick electrolyte fabricated by a vacuum-based deposition process is called a thin-film solid oxide fuel cell (TF-SOFC) [3,4]. One of the 2 of 8 typical fabrication methods for TF-SOFC, in which a thin film is directly deposited on a nano-porous template, such as anodic aluminum oxide (AAO), has been extensively studied due to the simple fabrication steps by consecutive deposition processes [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Reducing In-Plane Resistance of Nickel Oxide-Samaria-Doped Ceria Anode in Thin-Film Solid Oxide Fuel Cells

et al. 2020

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Metal/NiO-Smarium-doped ceria (SDC) nano-composite thin film anodes were deposited on anodic aluminum oxide by co-sputtering to enhance the in-plane current-collecting ability and investigated by varying the composition of metal materials (Pt and Au). Full fuel cells with these nano-composites were fabricated and tested at 500 °C. Columnar anodes with a sponge structure were fabricated by varying the DC sputtering source power and they were thermally stable at the operating temperature. By adding metal material, the ohmic resistance, including the current collecting resistance, was drastically reduced and the polarization resistance also decreased. The nano-composite electrode with a Pt content of 61 at% showed the highest performance, which is a maximum power density of 212.5 mW/cm2 at 500 °C. In addition, Au was considered to reduce the current collecting resistance and the corresponding power density was 3 times higher than that with the NiO-SDC anode.

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“…Thus, the demand for low-cost solid oxide fuel cells (SOFCs) has stimulated research to develop low-temperature SOFCs (LTSOFCs, ≤500°C) [1]. Since the high performance of SOFCs requires high operating temperature to activate electrochemical reactions and charge transport processes, reduction in operating temperature will sacrifice performance of SOFCs.…”

Section: Introductionmentioning

confidence: 99%

Chemical Solution Deposition Technique of Thin-Film Ceramic Electrolytes for Solid Oxide Fuel Cells

Biswas¹,

Su²

2017

Modern Technologies for Creating the Thin-Film Systems and Coatings

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Chemical solution deposition (CSD) technique is recently gaining momentum for the fabrication of electrolyte materials for solid oxide fuel cells (SOFCs) due to its costeffectiveness, high yield, and simplicity of the process requirements. The advanced vacuum deposition techniques such as sputtering, atomic layer deposition (ALD), pulsed laser deposition (PLD), metallo-organic chemical vapor deposition (MOCVD) are lacking in scalability and cost-effectiveness. CSD technique includes a variety of approaches such as sol-gel process, chelate process, and metallo-organic decomposition. The present chapter discusses briefly about the evolution of CSD method and its subsequent entry to the field of SOFCs, various solution methods associated with different chemical compositions, film deposition techniques, chemical reactions, heat treatment strategies, nucleation and growth kinetics, associated defects, etc. Examples are cited to bring out the history dating back to the discovery of amorphous zirconia film through the successful fabrication of the crystalline fluorite-type films such as yttria-stabilized zirconia (YSZ), scandia-doped ceria (SDC), and crystalline perovskitetype films such as yttria-doped barium zirconate (BZY) and yttria-doped barium cerate (BCY), to name a few.

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High-performance ultra-thin film solid oxide fuel cell using anodized-aluminum-oxide supporting structure

Cited by 66 publications

References 17 publications

Review on process-microstructure-performance relationship in ALD-engineered SOFCs

Review on process-microstructure-performance relationship in ALD-engineered SOFCs

Investigation of Reducing In-Plane Resistance of Nickel Oxide-Samaria-Doped Ceria Anode in Thin-Film Solid Oxide Fuel Cells

Chemical Solution Deposition Technique of Thin-Film Ceramic Electrolytes for Solid Oxide Fuel Cells

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